1,128 research outputs found
The Milch Goat
Interest in the milch goat has been stimulated by the world-wide food shortage and a keener appreciation of the food value of milk. Altho goats are kept mainly for the production of mohair, meat and hides, several milk-producing strains are recognized and in some countries a large percentage of the milk produced Is goat\u27s milk. Germany had at the beginning of the war about 4,000,000 milk producing goats which returned annually over three times their capitalized value in the form of milk and by-products. While goats are widely known as scavengers, they must be fed liberally and well managed to secure the highest production. Goats\u27 milk, tho ill adapted for butter making, is excellent for cheese making and !or Infants and invalids. Its apparent freedom from tuberculosis also enhances Its value for these purposes. Goats are not, however, as economical dairy animals as cows, requiring over three and a half times as much feed per quart of milk produced. Care should be exercised by purchasers of goats to secure animals adapted for milk production
Soiling crops for milk production
Rapid increase in the price of grains and concentrates, used in feeding dairy cows for milk production, has quickened the interest of dairymen in the feeding problem. The urgent demand for human food has resulted in a more extended use of cereals for that purpose, a practice which has limited quite largely the quantities of grain available for live stock feeding. The curtailment in the use of grain demands that more reliance be placed upon roughages in the ration in order to supply the nutrients required by heavy producing dairy cows. The importance of leguminous hays and corn silage as a basis for any satisfactory winter ration, which has for its purpose the stimulation of the dairy cow to her most economical production and the efficient saving of grain, has been amply demonstrated. However, the practice in so far as summer feeding may be concerned, is more varied
Rearing Dairy Calves
To replace the aged and unproductive dairy cows in this country from five to seven million calves must be raised annually. Of this number probably more than one-third prove worthless at maturity because of their very limited performance at the pail. These calves are a financial loss both while they arc being grown and later when they are milked, because they fail to produce enough for a profit and because the value of their carcasses for beef is below the cost of growing. With the upward trend in the price of feed it behooves the dairyman to consider seriously what heifer calves can be raised with profit
A Nonlinear Super-Exponential Rational Model of Speculative Financial Bubbles
Keeping a basic tenet of economic theory, rational expectations, we model the
nonlinear positive feedback between agents in the stock market as an interplay
between nonlinearity and multiplicative noise. The derived hyperbolic
stochastic finite-time singularity formula transforms a Gaussian white noise
into a rich time series possessing all the stylized facts of empirical prices,
as well as accelerated speculative bubbles preceding crashes. We use the
formula to invert the two years of price history prior to the recent crash on
the Nasdaq (april 2000) and prior to the crash in the Hong Kong market
associated with the Asian crisis in early 1994. These complex price dynamics
are captured using only one exponent controlling the explosion, the variance
and mean of the underlying random walk. This offers a new and powerful
detection tool of speculative bubbles and herding behavior.Comment: Latex document of 24 pages including 5 eps figure
Probing the Inner Circumgalactic Medium and Quasar Illumination around the Reddest `Extremely Red Quasar' (ERQ)
Dusty quasars might be in a young stage of galaxy evolution with prominent
quasar feedback. A recently discovered population of luminous, extremely red
quasars at ~2--4 has extreme spectral properties related to
exceptionally powerful quasar-driven outflows. We present Keck/KCWI
observations of the reddest known ERQ, at \,2.3184, with extremely fast
[\ion{O}{III}]~5007 outflow at 6000~km~s. The Ly
halo spans 100~kpc. The halo is kinematically quiet, with velocity
dispersion 300~km~s and no broadening above the dark matter
circular velocity down to the spatial resolution 6~kpc from the quasar.
We detect spatially-resolved \ion{He}{II}~1640 and
\ion{C}{IV}~1549 emissions with kinematics similar to the Ly
halo and a narrow component in the [\ion{O}{III}]~5007. Quasar
reddening acts as a coronagraph allowing views of the innermost halo. A narrow
Ly spike in the quasar spectrum is inner halo emission, confirming the
broad \ion{C}{IV}~1549 in the unresolved quasar is blueshifted by
~km~s relative to the halo frame. We propose the inner halo is
dominated by moderate-speed outflow driven in the past and the outer halo
dominated by inflow. The high central concentration of the halo and the
symmetric morphology of the inner region are consistent with the ERQ being in
earlier evolutionary stage than blue quasars. The
\ion{He}{II}~1640/Ly ratio of the inner halo and the asymmetry
level of the overall halo are dissimilar to Type~II quasars, suggesting unique
physical conditions for this ERQ that are beyond orientation differences from
other quasar populations. We find no evidence of mechanical quasar feedback in
the Ly-emitting halo.Comment: 20 pages, 18 figures, published in MNRA
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Unit costs of waste management operations
This report provides estimates of generic costs for the management, disposal, and surveillance of various waste types, from the time they are generated to the end of their institutional control. Costs include monitoring and surveillance costs required after waste disposal. Available data on costs for the treatment, storage, disposal, and transportation of spent nuclear fuel and high-level radioactive, low-level radioactive, transuranic radioactive, hazardous, mixed (low-level radioactive plus hazardous), and sanitary wastes are presented. The costs cover all major elements that contribute to the total system life-cycle (i.e., ``cradle to grave``) cost for each waste type. This total cost is the sum of fixed and variable cost components. Variable costs are affected by operating rates and throughput capacities and vary in direct proportion to changes in the level of activity. Fixed costs remain constant regardless of changes in the amount of waste, operating rates, or throughput capacities. Key factors that influence cost, such as the size and throughput capacity of facilities, are identified. In many cases, ranges of values for the key variables are presented. For some waste types, the planned or estimated costs for storage and disposal, projected to the year 2000, are presented as graphics
Hierarchically coupled ultradian oscillators generating robust circadian rhythms
Ensembles of mutually coupled ultradian cellular oscillators have been proposed by a number of authors to explain the generation of circadian rhythms in mammals. Most mathematical models using many coupled oscillators predict that the output period should vary as the square root of the number of participating units, thus being inconsistent with the well-established experimental result that ablation of substantial parts of the suprachiasmatic nuclei (SCN), the main circadian pacemaker in mammals, does not eliminate the overt circadian functions, which show no changes in the phases or periods of the rhythms. From these observations, we have developed a theoretical model that exhibits the robustness of the circadian clock to changes in the number of cells in the SCN, and that is readily adaptable to include the successful features of other known models of circadian regulation, such as the phase response curves and light resetting of the phase
Treatable brain network biomarkers in children in coma using task and resting-state functional MRI: a case series
The withdrawal of life-sustaining therapies is frequently considered for pediatric patients with severe acute brain injuries who are admitted to the intensive care unit. However, it is worth noting that some children with a resultant poor neurological status may ultimately survive and achieve a positive neurological outcome. Evidence suggests that adults with hidden consciousness may have a more favorable prognosis compared to those without it. Currently, no treatable network disorders have been identified in cases of severe acute brain injury, aside from seizures detectable through an electroencephalogram (EEG) and neurostimulation via amantadine. In this report, we present three cases in which multimodal brain network evaluation played a helpful role in patient care. This evaluation encompassed various assessments such as continuous video EEG, visual-evoked potentials, somatosensory-evoked potentials, auditory brainstem-evoked responses, resting-state functional MRI (rs-fMRI), and passive-based and command-based task-based fMRI. It is worth noting that the latter three evaluations are unique as they have not yet been established as part of the standard care protocol for assessing acute brain injuries in children with suppressed consciousness. The first patient underwent serial fMRIs after experiencing a coma induced by trauma. Subsequently, the patient displayed improvement following the administration of antiseizure medication to address abnormal signals. In the second case, a multimodal brain network evaluation uncovered covert consciousness, a previously undetected condition in a pediatric patient with acute brain injury. In both patients, this discovery potentially influenced decisions concerning the withdrawal of life support. Finally, the third patient serves as a comparative control case, demonstrating the absence of detectable networks. Notably, this patient underwent the first fMRI prior to experiencing brain death as a pediatric patient. Consequently, this case series illustrates the clinical feasibility of employing multimodal brain network evaluation in pediatric patients. This approach holds potential for clinical interventions and may significantly enhance prognostic capabilities beyond what can be achieved through standard testing methods alone
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