2,584 research outputs found
Measurements of heavy ion beam losses from collimation
The collimation efficiency for Pb ion beams in the LHC is predicted to be
lower than requirements. Nuclear fragmentation and electromagnetic dissociation
in the primary collimators create fragments with a wide range of Z/A ratios,
which are not intercepted by the secondary collimators but lost where the
dispersion has grown sufficiently large. In this article we present
measurements and simulations of loss patterns generated by a prototype LHC
collimator in the CERN SPS. Measurements were performed at two different
energies and angles of the collimator. We also compare with proton loss maps
and find a qualitative difference between Pb ions and protons, with the maximum
loss rate observed at different places in the ring. This behavior was predicted
by simulations and provides a valuable benchmark of our understanding of ion
beam losses caused by collimation.Comment: 12 pages, 20 figure
Erinnern um dazuzugehören. Kulturelles GedÀchtnis, Zugehörigkeitsstruktur und normative Vergangenheit
Pan-Africanism: a contorted delirium or a pseudonationalist paradigm? Revivalist critique
This essaic-article goes against established conventions that there is anything ethno-cultural (and hence national) about the so-called African tribes. Drawing largely from the culture history of precolonial/prepolitical Africansâthat is, the Bantu/Cushitic-Ethiopians (Azanians)âthe author has demonstrated vividly that far from being distinct ethno-culture national communities, the so-called tribes of African states are better considered subculture groups, whose regional culture practices erstwhile paid tribute to their nationâs main culture center in Karnak. For example, using the culture symbols and practices of some local groups and linking them to the predynastic and dynastic Pharaonic periods, I argued that there is compelling evidence against qualifying Africaâs tribes as distinct ethno-culture national entities. In genuine culture context, I stressed that the Ritual of Resurrection and its twin culture process of the mummification of deceased indigenous Pharaohs tend to suggest that the object of the Bantu/Cushitic-Ethiopians national culture was life (in its eternal manifestation) and then resurrection later, and that there are recurring (culturally sanctioned) ethical examples among the culture custodians of these subculture groups that generally pay tribute to the overarching culture norm. Furthermore, the fact that the Ritual of Resurrection began in the Delta region and ended at the Sources of the Nile, where the spirit of the deceased indigenous Pharaohs was introduced into the spiritual world of their ancestors, contradicts conventional perceptions that ancient Egypt was a distinct national community isolated from precolonial/prepolitical Africa/Azania
Produção de gado de corte e acĂșmulo de matĂ©ria seca em sistemas de integração lavoura: pecuĂĄria em presença e ausĂȘncia de trevo branco e nitrogĂȘnio.
O trabalho foi conduzido com o objetivo de verificar a influĂȘncia da adubação nitrogenada em uma pastagem de azevĂ©m (Lolium multiflorium L.) e aveia (Avena strigosa Scherb) em presença e ausĂȘncia de trevo branco (Trifolium repens L.), conferida pelo acĂșmulo e produção de matĂ©ria seca, ganho mĂ©dio diĂĄrio, ganho de peso vivo e carga animal no sistema de integração lavoura-pecuĂĄria sob sistema de plantio direto. A cultura antecessora da pastagem foi a soja (Glycine Max L.). O delineamento experimental foi em blocos completos ao acaso, com parcelas subdivididas e trĂȘs repetiçÔes. Nas parcelas, foram testadas quatro doses de nitrogĂȘnio (0, 100, 200 e 300 kg.ha-1) e nas subparcelas, a combinação de presença e ausĂȘncia de trevo branco. A elevação das doses crescentes de N aumentaram de forma linear crescente o acĂșmulo e a produção de matĂ©ria seca da pastagem. A carga animal e o ganho de peso vivo por hectare de bovinos aumentaram com o incremento de nitrogĂȘnio. Os resultados demonstram o efeito da adubação nitrogenada no acĂșmulo diĂĄrio, na produção de matĂ©ria seca, carga animal e no ganho de peso vivo
Whole proteome identification of plant candidate G-protein coupled receptors in Arabidopsis, rice, and poplar: computational prediction and in-vivo protein coupling
Computational prediction and in vivo protein coupling experiments identify candidate plant G-protein coupled receptors in Arabidopsis, rice and poplar
Standing osteosynthesis of an accessory carpal bone fracture in a Warmblood mare with a 6âhole 3.5 talonavicular fusion plate and 3.5âmm screws
A 9-year-old Warmblood, high-level showjumping mare sustained an acute, closed, vertical, comminuted fracture of the left accessory carpal bone (ACB) during a fall. The fracture was repaired under standing sedation and local anaesthesia, using a 6-hole APTUSÂź 3.5 TFP and 5âĂâ3.5-mm self-tapping TriLock© screws. The mare recovered from surgery without complications. Upon follow-up examination 9âmonths post-operatively the mare was sound in all gaits and back to full athletic activity. The ACB fracture had completely healed. The displaced dorsoproximal fracture fragment was in a stationary position and there was evidence of mild nonprogressive osteoarthritis of the antebrachiocarpal joint
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