258 research outputs found
Aspectos histĂłricos do bicudo do algodoeiro (Anthonomus grandis Baheman).
bitstream/item/33276/1/ASPECTOS-HISTORICOS-DE-BICUDO.pd
ECLSS advanced automation preliminary requirements
A description of the total Environmental Control and Life Support System (ECLSS) is presented. The description of the hardware is given in a top down format, the lowest level of which is a functional description of each candidate implementation. For each candidate implementation, both its advantages and disadvantages are presented. From this knowledge, it was suggested where expert systems could be used in the diagnosis and control of specific portions of the ECLSS. A process to determine if expert systems are applicable and how to select the expert system is also presented. The consideration of possible problems or inconsistencies in the knowledge or workings in the subsystems is described
A diagnostic prototype of the potable water subsystem of the Space Station Freedom ECLSS
In analyzing the baseline Environmental Control and Life Support System (ECLSS) command and control architecture, various processes are found which would be enhanced by the use of knowledge based system methods of implementation. The most suitable process for prototyping using rule based methods are documented, while domain knowledge resources and other practical considerations are examined. Requirements for a prototype rule based software system are documented. These requirements reflect Space Station Freedom ECLSS software and hardware development efforts, and knowledge based system requirements. A quick prototype knowledge based system environment is researched and developed
Liberty and British identity: printed reactions to the Quebec Act 1774-1775
This thesis explores reactions to the Quebec Act of 1774 in pamphlets and newspapers within Britain and the American colonies. The Quebec Act was signed by George III in June of 1774, the bill instituted French Civil Law, put in place a military governor and a executive council, all of whom served at the will of the Crown, and effectively established Roman Catholicism in Canada under the Crown’s control. The rhetoric analyzed for this thesis came from a number of contemporary pamphlets and newspaper commentaries on the Quebec Act specifically,or on colonial policy, which included the Quebec Act, more generally. The pamphlets were written by ministers, politicians, public figures and anonymous individuals. The concepts, ideals, and words used by these various commentators suggest underlying concerns and ideals which they all share and which their audience would understand and identify with. In using the rhetoric employed in these sources this study hopes to show that in their reactions to the incorporation of French Catholics, under their own laws and religious traditions, British contemporaries revealed their conception of what it meant to be British.There is a strong sense that British Protestantism was not so unified that it would serve as an effective foundation to build an identity. Therefore, rather than simply being formed as a reaction against the French and Catholic Other, this identity seems to be rooted in a positive sense of the nature of English liberty, which was then extended to the British people. The rhetoric in the American colonies is used to show how an identity centered on the ideal of liberty functions on the periphery. This thesis hopes to also address the fact that the Quebec Act has been overlooked by many who address the issue of British identity. Such an event, even if overshadowed in popular history by the other Coercive Acts, is a valuable episode in the creation and expression of a British Identity
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Evaluation of rabbit breeds and crosses for overall commercial productivity
In two breeding experiments, straightbred and crossbred rabbits were evaluated for performance characters relating to reproduction, disease resistance, growth and carcass quality. In the first experiment,
New Zealand White CNN) and Flemish Giant (FG) straightbreds and FG sire x (Florida White-New Zealand White dam) terminal-crossbreds (TX) were involved. Reproductive performance was generally lower for small crossbred compared to straightbred doe groups, which were similar. However, doe group comparisons based on total production per unit of building area were not made. For NN straightbreds compared to FG straightbred and TX groups, litter size was larger and litter weight was heavier at 56 d and feed intake was increased. Average daily gain and 56 d weight per rabbit were larger but mortality from respiratory diseases was higher for FG straightbreds, while performance was similar between NN and TX groups. Total mortality was lowest in TX compared to straightbred litters. From carcass appraisal investigations, FG-sired progeny had more favorable body composition than NN progeny. Comparisons of terminal-crosses to straightbred groups revealed crossbred advantages for body measurement and lean yield traits. In the second experiment, three sire breeds: Californian (CC), NN and FG and four dam genetic groups: CC and NN straightbreds and
Californian x New Zealand White (CN) and New Zealand White xCalifornian (NC) reciprocal crossbred does were involved. In addition,two
diets were fed to does and litters, either a commercial control diet or a 74% alfalfa diet. Preweaning and postweaning traits involving reproduction, disease resistance and litter growth were significantly influenced by straightbred doe, maternal heterosis, maternal breed and dietary effects, while sire breed effects on litter performance were more important during the postweaning phase. Important breed additive effects were found for carcass quality and lean yield traits. Maternal breed and heterotic and direct heterotic effects on
carcass traits were generally of negligible importance. Carcass weights were heaviest in progeny of FG paternity and of crossbred dam
maternity. Total meat percentage of carcasses was similar for all genetic groups evaluated.
In conclusion, both experiments suggest the potential utilization of a large sire breed with straightbred or crossbred does of NN
maternity to increase litter growth, disease resistance and slaughter weights of terminal-cross rabbits
Pre-weaning growth performance of kits of a local Algerian rabbit population: influence of dam coat color, parity and kindling season
[EN] This study evaluated the effect of dam coat colours, doe’s parity order, year and kindling season on litter size and growth of suckling kits of a local Algerian rabbit population. Rabbits were reared in the rabbitry of Tizi Ouzou (Algeria) in wire mesh cages placed in a building with natural lighting and ventilation and absence of temperature regulation. Weights and size of 572 litters (3795 kits) at birth, 7, 14, 21 and 28 d were analysed. The mother’s coat colours (2 levels only: albino or coloured coat), the doe’s parity (1, 2, 3, 4-5, 6-8, ≥9 kindlings), the kindling year (4 consecutive years) and the kindling season (3 seasons: Feb-May, June-Sept and Oct-Jan), were used as main fixed factors in a factorial analysis. The population was characterised by an average individual weight of 54 g at birth and 404 g at 30 d, growth rate of 10.24 g/d between birth and 24 d and of 19.02 g/d between 24 and 30 d. The coloured females were more prolific than the albino ones: 5.59 vs. 5.09 weaned/litter (P=0.016); but kits born from albino does had a larger individual weight at weaning: 391 vs. 362 g (P=0.006). The doe’s parity order had no significant influence on the litter weight, individual weight or litter size at kindling. However, it influenced litter weight and litter size from 7 d of age up to 28 d in favour of 2nd and 3rd parity (P<0.02). Litter size was not significantly affected by year of kindling at any considered age. On the contrary, year of birth greatly influenced litter and individual weights. For example, the difference in individual weights at 28 d between the best and the worst year represented 19% of the average weight at this age. The birth season influenced mainly (P<0.001) litter size from birth until weaning in favour of the spring season: 5.92 weaned/litter vs. 5.05 or 5.04 for the 2 other seasons. From day 7 until weaning, the litter weight was larger for the Feb-May season (P<0.02) and represented +0.87 grams per litter at 28 d. The litter weight was similar for the 2 other seasons (non significant differences) whatever the age in consideration. Season had no significant effect on individual weight of kits from birth until weaning. Abdelli-Larbi, O.; Mazouzi-Hadid, F.; Berchiche, M.; Bolet, G.; Garreau, H.; Lebas, F. (2014). Pre-weaning growth performance of kits of a local Algerian rabbit population: influence of dam coat color, parity and kindling season. World Rabbit Science. 22(3):231-240. doi:10.4995/wrs.2014.1493.SWORD231240223Afifi E.A., Kadry A.E.H., Khalil M.H. 1985. Factors influencing preweaning body weights in rabbits. Al-Azhar J. Agric. Res., 3: 101-110.Afifi E.A., Emara M.E., Kadry A.E.H. 1987. Birth weight in purebred and crossbreed rabbits. J. Appl. Rabbit Res., 10: 133-137.Afifi E.A., Khalil M.H. 1991. Crossbreeding experiments of rabbits in Egypt: synthesis of results and overview. Options Méditerranéennes, Série A, Séminaires Méditerranéens, 17: 35-52.Cheeke P.R., Patton N.M., Lukefahr S.D., McNitt J.I. 1987. Rabbit production. Intersate Ed., Danville, IL, USA, 472 pp.Khalil M.H., Khalil H.H. 1991. Genetic and phenotypic parameters for weaning and preweaning body weights and gain in Bouscat and Giza White rabbits. J. Appl. Rabbit Res., 14: 44-51.Lukefahr S.D., Harris D.J., Cheeke P.R., Patton N.M. 1982. Influence of major coat colour genes on early survival and growth rate in rabbits. J. Appl. Rabbit Res., 5: 45-50.Lukefahr S.D. 1986. Basic inheritance of coat colour in rabbits. J. Appl. Rabbit Res., 9: 168-174.Mazouzi-Hadid F., Lebas F., Berchiche M., Bolet G. 2012. Influence of coat colour, season and physiological status on reproduction of rabbit does of an Algerian local population. In Proc.: 10th World Rabbit Congress, September 3-6, 2012, Sharm El-Sheikh, Egypt, 425-429.Robinson R. 1958. Genetic studies of the rabbit. Nijhoff Ed., The Hague, Netherlands. 370 pp.Robinson R. 1978. Color inheritance in small lives stock. Watmoughs Ltd., Idle, Bradford, England, 139-181.Singh U., Umesh S., Sharma S.R., Kumar D., Bhatt R.S., Risam K.S., Davendra K., Sawal R.K., Swain N. 2004. Effect of parity on reproductive performance of German Angora rabbits. Indian J. Anim. Sci., 75: 547-549.Szendrő Zs., Barna J. 1984. Some factors affecting mortality of suckling and growing rabbits. In Proc.: 3rd World Rabbit Congress, 1984, Rome, Italy, 2: 166-173.Zerrouki N., Bolet G., Berchiche M., Lebas F. 2004. Breeding performances of local Kabylian rabbits does in Algeria. In Proc.: 8th World Rabbit Congress, 7-10 September, 2004, Puebla, Mexico, 371-377
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