116,682 research outputs found
Numerical simulation of ram extrusion in short-fiber-reinforced fresh cementitious composites
No full textThis is the author's accepted manuscript. The final published article is available from the link below. First published in JoMMS in 4(10), 2009, published by Mathematical Sciences Publishers.A series of ram extrusion tests was carried out on a short-fiber-reinforced, semisolid, fresh cementitious composite. An elastoviscoplastic constitutive model is proposed for the extrudable fresh cementitious composite. It features the associative flow rule, a nonlinear strain rate-hardening law, and the von Mises yield criterion. The model is then implemented in ANSYS/LS-DYNA explicit finite element code.
Various ram extrusion processes of the fresh cementitious composite were simulated. It has been found that the extrusion load versus imposed displacement predictions agree well with the experimental results. The fresh paste flow, through the die entry and the die-land, is then interpreted in light of the evolution of the deformation and distribution of state variables, mainly based on numerical results and the ram extrusion mechanism.
The effects of extrusion ratio and extrusion velocity on extrusion load are also investigated, based on the mechanical properties of the fresh cementitious composite. The study indicates that the numerical procedure established, together with the constitutive model proposed, is applicable for describing ram extrusion of short-fiber-reinforced fresh cementitious composites, which might provide a numerical rheometric tool from which ram extrusion of elastoviscoplastic paste-like materials can be examined and quantified.Hong Kong Research Grant Council and China Ministry of Science and Technology
ram n: ram pasture
No full textram nAccording to one informant, 'there were no rooms in the bunkhouses then. .they were just one big ram-pasture'. The phrase 'ram pasture' has been used to refer to the sleeping quarters of a lobster-packing factory in Prince Edward Island. .as well as to the large one-room accommodations for loggers in the bunkhouses of Maine. [Two refs to Edward D. Ives, the U.S. folklorist & collector]DNE Sup PRINTED ITEM 63[I wonder if any dictionaries have picked this up?] G. M. StoryMAR. 8 1988 WKUsed SupNot usedWithdraw
Scientometric portrait of Ram Gopal Rastogi
No full textPublication productivity of Indian scientist (R.G. Rastogi) has been documented.
Scientometric analysis of 312 papers by Ram Gopal Rastogi published during 1954 to 1992 in various domains: (a) Luni -solar activity and quiet -time E & F- region (57); (b) Equatorial electric field and low and mid latitude iof:osphere (78); (c) Ionospheric E- region irregularities (19); (dj Ionospheric F- region irregularities (32); and (e) Magnetic disturbance effects on the equatorial low and mid latitude ionosphere (23) were analysed. Interdomainery contents and of the number of papers: a+b were 36; b+c and b+d were 20 each; b+e were 16;. c+e were 5; a+e were 3; d+e were 2; and a+d had only one publication. Highest collaborations were with H. Chandra (61), M.R. Deshpande (42), and G. Sethia (19) out of his total 97 collaborators. His highest productivity was during 1978 with 28 papers followed by 19 papers during 1977. The core journals preferred by him for publishing papers were: Indian Journal of Radio & Space Physics, India, and Journal of Atomic & Terrestrial Physics, UK (59 each), followed by Proceedings of the Indian Academy of Sciences, India (34). Most prolific title keywords with their frequencies were: Ionosphere (92); Equatorial (61); F-region (53); Equatorial electrojet region (40), and Magnetic equator (30)
Integrated CMOS static RAM
No full textIntegrated CMOS static RAM characterized by a hierarchical and modular structure
ram n / ram-cat n
No full textram-cat n_OED_ ~ 'Now only _dial_'. 'A male cat.' first ci te is 1672 JOSSELYN 16 last is 1809. Smollett uses it in his tr of _Gil Blas_. _EDD_ ram sb� 1 (2) 'a tom cat', cites from So D Co. We'll try fieldwork for the sense of 'a male cat.'DNE SupJUN. 23 1988 G. M. StoryUsed I and SupUsed I and SupUsed
Influence of gastrointestinal trichostrongylidosis on ram fertility
No full textA study on the influence of gastrointestinal trichostrongyles on ram fertility was performed.
Two groups of semen donor rams (Sarda breed) were utilized; one was experimentally infected with
Haemonchus contortus, Trichostrongylus colubriformis and Teladorsagia circumcincta and the other
was used as a control group. In all animals, coprological, haematological and reproductive parameters
were studied. The results suggest that the parasites had a limited effect with some changes
in phosphorus, cholesterol and chlorine levels. In our experience the parasitic burden produced no
significant change on ram fertility
Efficacy of Different ELISA, Histopathology and PCR Assays for the Diagnosis of Ovine Brucellosis in Ram
No full textDiagnosis of ovine brucellosis infection inthe ram hasepididymitis and orchitis has not been established. The aim of this study,to investigate the diagnostic value of ELISA, Histopathology and PCR for ovine brucellosis in ram in Karbala city. 30 ram’s serum and semen were collected from ram for serological and molecular assay, in addition three testicular tissueswere castrated from ram forhistopathological diagnosis of Ovine brucellosis. Sensitivity and specificity of ELISA and PCR were 80% ,70%; and 87.5%, 57.14%; respectivel,Palpable enlargement of the epididymis and testicular hypoplasia. Sensitivity by ELISA was higher in the ovine brucellosis detection than PCR, but specificity values were lower. Grossly visible lesions in the epididymis associated with Ram Brucellosis withPocket of inspissate material resulting from extravasation of sperm
Oxidative and Molecular-Structural Alterations of Spermatozoa in Swine and Ram Exposed to the Triazole Ipconazole
No full textAuthor Contributions:
Conceptualization, W.H., E.T. and M.R.-G.; Data curation, L.B.-A.; Formal analysis, B.L.-M., A.R. and and E.R.; Funding acquisition, M.R.-G.; Investigation, C.F., B.L.-M., L.B.-A., O.R.-C., E.T. and M.R.-G.; Methodology, C.F., O.R.-C., E.T. and A.R.; Project administration, M.R.-G.; Resources, W.H., B.L.-M. and O.R.-C.; Software, A.R.; Validation, M.R.-G.; Visualization, W.H., L.B.-A.Triazole pesticides are widely used throughout the world, but their abuse causes toxic effects in non-targeted organisms. In the present study, the cytotoxic effect of the triazole ipconazole was evaluated in porcine and ram spermatozoa. Ipconazole significantly reduced sperm viability, increased ROS levels, altered catalase and SOD enzyme activity, and caused alterations in the molecular mRNA expression of structural biomarkers (PRM1, ODF2, AKAP4, THEG, SPACA3 and CLGN) related to fertility in males, as well as the overexpression of BAX (cell death) and ROMO1 (oxidative stress) mRNA. Our results indicate that the fungicide triazole is involved in cellular, enzymatic and molecular alteration of porcine and ram spermatozoa, and is possibly a factor in the development of infertility in male mammalsNational University of San Marcos (Italia)Depto. de Farmacología y ToxicologíaFac. de VeterinariaTRUEpu
Reproducci�n de la morena, Gymnothorax equatorialis (Pisces: Muraenidae) en Jalisco y Colima, M�xico
No full textCon el fin de analizar los aspectos reproductivos de Gymnothorax equatorialis se recolectaron mensualmente 707 organismos en las costas de Jalisco y Colima, M�xico, de diciembre de 1995 a diciembre de 1998 y de agosto a diciembre de 1999. Las hembras fueron m�s numerosas y presentaron una longitud (54.7 cm) mayor a la de los machos (52.1 cm). La fecundidad total m�nima fue de 9 660 huevos, la m�xima de 99 992 y la media fue 32 029 huevos. La talla en la que el 50 % de los individuos presentan g�nadas maduras (L50) fue de 43.7 cm de longitud total en hembras y de 42.7 cm en machos. Los ovarios presentaron dos tipos de ovocitos, los peque�os inmaduros en fase cromatina nucleolo (85.1 �m) y los grandes maduros en fase de vitelog�nesis secundaria (701.6 �m). En el test�culo maduro se observ� una gran cantidad de espermatozoides en el tubo seminal y el desarrollo del test�culo es de tipo lobular. Con base en las caracter�sticas de las g�nadas y la evoluci�n temporal del �ndice gonadosom�tico, se concluye que G. equatorialis se reproduce dos veces al a�o (a mediados y finales del a�o)
Great Expectatrics: Great Papers, Great Journals, Great Econometrics
No full textThe paper discusses alternative Research Assessment Measures (RAM), with an emphasis on the Thomson Reuters ISI Web of Science database (hereafter ISI). The various ISI RAM that are calculated annually or updated daily are defined and analysed, including the classic 2-year impact factor (2YIF), 5-year impact factor (5YIF), Immediacy (or zero-year impact factor (0YIF)), Eigenfactor score, Article Influence, C3PO (Citation Performance Per Paper Online), h-index, Zinfluence, and PI-BETA (Papers Ignored - By Even The Authors). The ISI RAM data are analysed for 8 leading econometrics journals and 4 leading statistics journals. The application to econometrics can be used as a template for other areas in economics, for other scientific disciplines, and as a benchmark for newer journals in a range of disciplines. In addition to evaluating high quality research in leading econometrics journals, the paper also compares econometrics and statistics, alternative RAM, highlights the similarities and differences in alternative RAM criteria, finds that several ISI RAM capture similar performance characteristics for the leading econometrics and statistics journals while the new PI-BETA criterion is not highly correlated with any of the other ISI RAM, and hence conveys additional information regarding ISI RAM, highlights major research areas in leading journals in econometrics, and discusses some likely future uses of RAM.Research assessment measures, impact factors, Immediacy, Eigenfactor score, Article influence, h-index, C3PO, Zinfluence, PI-BETA
- …
