Critical points on growth curves in autoregressive and mixed models

Adjusting autoregressive and mixed models to growth data fits discontinuous functions, which makes it difficult to determine critical points. In this study we propose a new approach to determine the critical stability point of cattle growth using a first-order autoregressive model and a mixed model with random asymptote, using the deterministic portion of the models. Three functions were compared: logistic, Gompertz, and Richards. The Richards autoregressive model yielded the best fit, but the critical growth values were adjusted very early, and for this purpose the Gompertz model was more appropriate

Surgical Treatment Of Avulsion Fractures Of The Knee Pcl Tibial Insertion: Experience With 21 Cases [tratamento Cirúrgico Da Fratura-avulsão Da Inserção Tibial Do L.c.p. Do Joelho: Experiência De 21 Casos]

We assessed 21 patients (16 males and 5 females), with mean age of 27.6 years who underwent surgical treatment for PCL avulsion fracture. In 57% of the cases, injuries were secondary to motorcycle accidents and 19% resulted from car accidents. Injuries on knee.s anterior surface were detected in 72% of the cases. The surgical procedure involved posterior approach and bone fragment fixation using nut and screw in 18 cases, the trans-bone suture loop fixation in 3 cases with small bone fragments. In 91% of the cases, surgery was performed within the first two weeks following injury. The patients were objectively (posterior drawer test) and subjectively (Lysholm scale) re-evaluated after a minimum follow-up period of 12 postoperative months. The statistical analysis of objective and subjective assessments did not demonstrate any significant difference (p = 0.05). The satisfactory results of the subjective clinical postoperative evaluation may have been due to the absence of peripheral ligament injury. However, the presence of residual tibial posteriorization suggests that the avulsion fracture of the PCL should be treated as bone-ligament injury, and not just as a bone lesion.155272275Wind WM Jr, Bergefeld JA, Parker RD. Evaluation and treatment of posterior cruciate injuries. Revisited. Am J Sports Med. 200432:1765-75Deeham, D.J., Pinczewski, L.A., Arthroscopic reattachment for an avulsion fracture of the tibial insertion of the posterior cruciate ligament. (2001) Arthroscopy, 17, pp. 422-425Girgis, F.G., Marshall, J.L., Monarem, A.R.S., The cruciate ligaments of the knee joint: Anatomical, functional and experimental analysis (1975) Clin Orthop Relat Res, 106, pp. 216-231Van Dommelen, B.A., Fowler, P.J., Anatomy of posterior cruciate ligament. A review (1989) Am J Sports Med, 17, pp. 24-29de Abreu, M.R., Kim, H.J., Ching, C.B., Jesus, J.M., Cho, J., Trudell, D., Posterior cruciate ligament recess and normal posterior capsular insertional anatomy: MR imaging of cadaveric knees (2005) Radiology, 236, pp. 968-973Meyers, M.H., Isolated avulsion of the tibial attachment of the posterior cruciate ligament of the knee (1975) J Bone Joint Surg Am, 57, pp. 669-672Trickey, E.L., Injuries of the posterior cruciate ligament: Diagnosis and treatment of early injuries and reconstruction of late instability (1980) Clin Orthop Relat Res, 147, pp. 76-81Torisu, T., Avulsion fractures to the tibial attachment of the posterior cruciate ligament: Indications and results of delayed repair (1979) Clin Orthop Relat Res, 143, pp. 107-114Torisu, T., Isolated avulsion fractures to the tibial attachment of the the posterior cruciate ligament (1977) J Bone Joint Surg Am, 59, pp. 68-72Seitz, H., Schlenz, I., Pajenda, G., Vecsei, V., Tibial avulsion fracture of the posterior cruciate ligament: K-wire or screw fixation? A retrospective study of 26 patients (1997) Arch Orthop Trauma Surg, 116, pp. 275-278Vaselko, M., Saciri, V., Posterior approach for arthroscopic reduction and antegrade fixation of avulsion fracture of the posterior cruciate ligament from the tibia with cannulated screw and washer (2003) Arthroscopy, 19, pp. 916-921Trickey, E.L., Rupture of the posterior cruciate ligament of the knee (1968) J Bone Joint Surg Br, 50, pp. 334-341Burks, R.T., Schaffer, J.J., A simplified approach to the tibial attachment of the posterior cruciate ligament (1990) Clin Orthop Relat Res, 254, pp. 216-219Lee, H.G., Avulsion fracture of the tibial attachments of the cruciate ligaments: Treatment by operative reduction (1937) J Bone Joint Surg, 19, pp. 460-468Brenan, J.J., Avulsion injuries of the posterior cruciate ligament (1960) Clin Orthop Relet Res, 18, pp. 153-163Kim, S.-J., Shin, S.-J., Cho, S.-K., Kim, H.-K., Arthroscopic suture fixation of bone avulsion of the posterior cruciate ligament (2001) Arthroscopy, 17, pp. 776-780Shino, K., Nakata, K., Mae, T., Yamada, Y., Shiozaki, Y., Toritsuka, Y., Arthroscopic fixation of tibial bone avulsion of the posterior cruciate ligament (2003) Arthroscopy, 19, pp. 12eInoue, M., Yasuda, K., Kondo, E., Saito, K., Ishibe, M., Primary repair of posterior cruciate ligament avulsion fracture. The effect of occult injury in the midsubstance on postoperative instability (2004) Am J Sports Med, 32, pp. 1230-123

ANÁLISE DE REGRESSÃO em EXPERIMENTOS em PARCELAS SUBDIVIDIDAS COM DADOS NÃO-BALANCEADOS: UMA SOLUÇÃO NA LINGUAGEM GLIM

São estabelecidas as matrizes necessárias para a realização da análise de variância de experimentos em parcelas subdivididas, com dados não-balanceados e balanceados, quando os tratamentos aplicados às parcelas e os tratamentos aplicados às subparcelas são ambos fatores quantitativos, usando a teoria de modelos lineares e de modelos lineares generalizados. Foi desenvolvido um programa computacional, na linguagem GLIM, para a realização da análise.The necessary matrices are formed to perform the analysis of variance of split-plot designs with unbalanced data, when the treatments applied to plots and treatments applied to subplots are both quantitative factors, using the linear model theory and the generalised linear model theory. A program using GLIM was developed to perform the analysis

Murcha de Veticillium em Tomateiro: I. Influência do Potencial de Inóculo de Verticillium Dahliae no Comportamento das Variedades de Tomateiro Angela Hiper e Marmande VR.

O comportamento das variedades de tomateiro Angela Hiper, suscetível, e Marmande VR, resistentes à raça 1 de Verticilhum dahhae, sob diferentes potenciais de inóculo do patógeno, foi estudado em condições controladas. A inoculação das plântulas foi realizada de 13 a 15 dias após a semeadura, através de imersão de raízes, por 15 minutos, em sus soes de inóculo ajustadas a diferentes concentrações. Para potenciais de inóculo de 10', lonnlo. conídiosliril, a evolução da doença e a severidade dos sintomas de murcha vascular foi tanto maior, em ambas as variedades, quanto mais elevado o potencial de inóculo dos isolados T- 1386 e T- 1439 de V. dahhae. Já para o isolado T- 1135, a variedade Marmande VR apresentou índices de doença muito baixos e lenta evolução de sintomas de quaisquer dos três potenciais de inóculo utilizados, sendo possível diferenciá-la da variedade A~pela Hiper. O mesmo foi observado para os isolados T- 1289 e T- 1355 inoculados com 10 e 10' conídiosinil. Entretanto, inoculaçôes com o isolado T-1289 à concentração de 10" conídiosíml proporcionaram elevados índices de doença na variedade Marmande VR, muito embora a mesma tenha se comportado como resistente em potenciais inferiores. O potencial de cerca de 10' conídios/nú mostrou ser o mais adequado para uso na identificação de raças do patógeno através da observação da reação das variedades Angela Hiper e Marinande VR de tomateiro, em condições controladas.Made available in DSpace on 2011-04-09T12:22:26Z (GMT). No. of bitstreams: 1 pab28novdez91.pdf: 767947 bytes, checksum: accb48f5c9dfa63b46ed79be0e615e4f (MD5) Previous issue date: 2002-02-08199