84 research outputs found
Measurement of the B0–B0 oscillation frequency Δmd with the decays B0→D−π+ and B0→ J/ψK∗0
No full textThe B
0
–B
0
oscillation frequency Δmd is measured by the LHCb experiment using a dataset corresponding
to an integrated luminosity of 1.0 fb−1
of proton–proton collisions at √
s = 7 TeV, and is found to be
Δmd
=0.5156±0.0051 (stat.)±0.0033 (syst.) ps−1
. The measurement is based on results from analyses
of the decays B
0
→ D
−π
+ (D
−
→ K
+π
−π
−) and B
0
→ J/ψK
∗0
(J/ψ →μ
+μ
−,K
∗0
→ K
+π
−) and
their charge conjugated modes
Fish is today one of the least known and most promising assets of the South
No full textThis is a news release written by Rachel Carson as part of the Department of the Interior Information Service; Office of the Coordinator of Fisheries. This report was "for office distribution only". This report states the catch of menhaden, mullet, shrimp, crabs, and oysters.OFFICE OF COORDINATORC F FISHERIES
For Release TO PM's, FRIDAY, OCTOBER 13, 1944.
Fish Is today one of the least known and most promising assets of the South,
according to a publication on the fshery reeources of that region just iesued by
the Interior Department's Office of the Coordinator of Fisheries.
The pamphlet is titled "Fish and Shellfiah of the South Atlantic and Gulf
Coasts" and was written by Rachel L. Carson, an aquatic biologist on the
Coordinator of Fisheries' staff. It is the third in a regional eeries of bulletins
by the same author dealing with the fisheries of the Unlted States.
Describing what the southern states have already done in building up their
fisherie's, the bulletin points out that at the present time "the South supplies
the United States with practically all of its shrimp, a third of its crabs, a
fourth of its' oysters, and a number of choice fishes that are not taken anywhere
else in abundance, like the red snapper, the Spanieh mackerel, and the pompano."
Although~fiah~and shellfish have been caught along the southern coasts ever
since the first settlements were made' in the region, "the ,fisheries of the South
Atl&ic &d Qulf coasts have by no means completed their development," accordi%
to Miss C&son. 'With a coastl.ine more than 2,500 mile@ long aa the crow flies,
the region produces only a little more than half a billion pounds of fishery
products -- 14 per cent of the total yield of the United States and:,Alaska."
Southern.coastal watere support a'greater variety of fish tid shellfish than
are found anywhere else in the country, but as yet only five major fisheries have
been developed -- those for menhaden, shrimpl mullet, .crabs, and oysters.
Describing the southern fisheries as. "a fertile field for exploration which
will reveal wh6ther they may in time yield &I, even larger and more valuable sea-food
harvest," the bulletin cites lack of sc'lentific exploration a8 one of the
reafsons for the slow development of the south~s.sea.-food resouroes, Comparatively
little is known either'of'the oceanography of the region or of the distrfbution
or habits of the fishes, With few exceptions, fishing operationa are confined to
waters close inshore.‘ .
,
Studies tie' needed; :t ls'pointsd o&, to fipd the areas where fieh may
congregate offshore, or whether such'areas exist. In addition to such explora-tions,
new methods of handling the catch would permit fuller use of apeciea known
to be abundant; T
Annual~landlngs of fish and shellfish in the states fro& North Carolina to
Texas total about'575,000,000 pounds, coneisting of come 85 different species.
(over)
The menh&en alone, 8; Iar@ member c the herrUg family, is 80 lnrpotia+t in tie
southern fishcries that It @&en up more thag half the total catch, and supports
the largest fishery of North Carolina, FlorMa, &d. M4aeie~13ppi, and the moet
valuable fishery of North Carolina, Menhaden Is an ?.xaportant source of meal end
oil umxl in enlmal fscidlnp; ma of oil .for bdustr~al wea.
The catch of shrimp ranl& next to 8lonhade.n in vo&x& and cxcounte for Q
quarter of the total landings, Shr%p fiehing 6 t&e principal aquatic industry
fra Georgja, Alobcma, Louisiana, end Texa#, and thw most valuable fiehery 18 most
aouthem atatee,
Mullet is the prinoigal food fieh of the eouh, ylaldlng an aanua.S catch of
35 t0 40 miil:!~ppould~. Laxgeet cat&e@ are mads on the weat coast of Florida
and ic~ the vicinity of Beaufort, J?orth Carol&a, the peak of the eeaeon coming in
the fall md ea;rly winter.
Mullet, crabs, and oysters epoch make up 3 ts 6 per cent of the total catch
of the region, all other *8pecle8 boiw caught in quantities of left@ than
10,000,000 pouade.
Differing greatly in the prodxxctivlty of thair fl.sherios, the eouthern state
are led by Florida which, with tts long coast Ilne, contributesl a third of the
total yield. North CerolJaa.1~1 a close eooond, with 30 per cent of the total,
nd xlotisiana la thS.rd, with 22 par cent,
Geographically, the producte of the southern fleherles (excl~~alve of the -'
canned pack) are dletrlbuted chiefly in the area bowed by the MLssiesippi River
on the west and the Ohio RiPer on the north, Certain speoios, however, have a
much wider dietribution, Probably shrimp and red snapper are 'chipped to more
distant cities than any other southern 80~ foode,
Can~@ng of sea food producta In the South ia XlmJ.tod almostenH.r&yto ehr'lmp
and oystera, The pator part of the &rimp &MI been canned in the past, but
there is now a strong-treti toward freezing more shrimp and cenning leers,
PractlcaUy all; the oyster cannw In the Unted Statee in done in the south, and
Blloxi, M&M., carrs more oysters than any .other city in the world,
Mc?t of the-fieh lasded. at southern ports entera the fresh-fish markets, ,&t
present the necessary shore facllitfce'for packa@% and frcoz?.ng .t& catch by the
meet modern hiboaf3 4827im3 tea in the South, The skQled.labor neceesarg to
operate such plants Is almost unobtainable u&x- war ponditions,
The new bulletin, whfch le bol3.cved3o be the first ~~bl,lshed account of the
fishery re8ourcea of the entire eouthern coast, contain@ Information on Bpproxi-mtely
29 different kinds pf fish and &oLljFl6h, In.cludln& many .of the lees known
and under utilized epecies of tht.region,
Copies of 'F3.ah and Shellfish of the south Atlantic and Gulf Coasts," Iu-mm
ae Conservation Bulletin 37 of the Department of the Interior, mayfbe obtained
from:tho Superintendent of Documents, Government PrIntiw OffQcs, Washn&on,
I>, C, for 10 cents each, 03: from membes of Congress on request,
P.N. 50033
First in the Nation in Education : Final Report,1984.
No full textThis report is one step in an ongoing process of change and is a plea for commitment for high standards in education in Iowa. Contains the final reports of the six subcommittees as adopted by the Excellence in Education Task Force, and the five recommendations made by the Task Force
Green behavior and sustainable consumption: a gratifying conclusion of environmental movement
No full textEarth is currently facing severe degradation, from global warming, ozone layer depletion, and large scale pollution among other causalities. Majority of these depredating forces have been traced back to exploitive human behaviors (UNEP, 2012). However, the environmental movement which was developed to protect the environment against such exploitive human actions, demands a change in our behavior towards the environment. The increasing awareness brought upon consumers by this movement, on the effect of our behavior on the environment, (Jackson 2005) which supports the adoption of environment friendly behavior. The concern over environmental degradation as a movement, first started in the United States of America (U.S.A), Europe, and then Asia. In United States of America, the movement appeared for the first time during the 1960s and 1970s, partially after experiencing the drawbacks from use of modern technology, and the first oil crisis (Grunert and Juhl, 1995). During the twentieth century, several environmental groups made attempts to create awareness among public on environmental conservation. For instance, Rachel Carson’s bestseller book entitled “Silent Spring” focused on the hazardous effects of application of DDT (Dichlorodiphenyltrichloroethane) and other human activities on the ecosystem and the environment (Carson, 1962). The author attempted to explain how each and every human activity had a direct or indirect effect on the food chain, its ecosystem, and ultimately the environment. The observations made by Rachel Carson were supported by then President of the United States of America, President John F. Kennedy, who acknowledged the importance of her book and environmental movement for the nation and the world
Quantification of food intake in Drosophila
No full textMeasurement of food intake in the fruit fly Drosophila melanogaster is often necessary for studies of behaviour, nutrition and drug administration. There is no reliable and agreed method for measuring food intake of flies in undisturbed, steady state, and normal culture conditions. We report such a method, based on measurement of feeding frequency by proboscis-extension, validated by short-term measurements of food dye intake. We used the method to demonstrate that (a) female flies feed more frequently than males, (b) flies feed more often when housed in larger groups and (c) fly feeding varies at different times of the day. We also show that alterations in food intake are not induced by dietary restriction or by a null mutation of the fly insulin receptor substrate chico. In contrast, mutation of takeout increases food intake by increasing feeding frequency while mutation of ovoD increases food intake by increasing the volume of food consumed per proboscis-extension. This approach provides a practical and reliable method for quantification of food intake in Drosophila under normal, undisturbed culture conditions
Scripting deliberative policy-making:Dramaturgic policy analysis and engagement know-how
No full textPublic engagers are officials tasked with facilitating collaborative performances in the theatres of deliberation that increasingly populate local governance. In Scotland, they work to involve citizens, communities and organizations in deliberative policy-making. Drawing on two years of ethnographic fieldwork, this paper shows how these policy workers deploy their own field of specialist knowledge during the scripting of participatory processes. The analysis eschewsconventional notions of “scripted participation” as tokenistic or manipulative, thus seeking a more sophisticated understanding of the know-how that animates engagement practice. The findings reveal the micro-politics of official participation processes through the “behind-the-scenes” work of engagement practitioners
Driven translocation of a semi-flexible polymer through a nanopore
No full text© 2017 The Author(s). We study the driven translocation of a semi-flexible polymer through a nanopore by means of a modified version of the iso-flux tension propagation theory, and extensive molecular dynamics (MD) simulations. We show that in contrast to fully flexible chains, for semi-flexible polymers with a finite persistence length l p the trans side friction must be explicitly taken into account to properly describe the translocation process. In addition, the scaling of the end-to-end distance R N as a function of the chain length N must be known. To this end, we first derive a semi-analytic scaling form for R N , which reproduces the limits of a rod, an ideal chain, and an excluded volume chain in the appropriate limits. We then quantitatively characterize the nature of the trans side friction based on MD simulations. Augmented with these two factors, the theory shows that there are three main regimes for the scaling of the average translocation time τ ∞N α . In the rod l p1, Gaussian l p 1 0 2 and excluded volume chain N / κ p 10 6 limits, α = 2, 3/2 and 1 + ν, respectively, where ν is the Flory exponent. Our results are in good agreement with available simulations and experimental data
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