Effect of age at first joining on lifetime production by Border Leicester × Merino ewes

1969 ◽  
Vol 9 (40) ◽  
pp. 477 ◽  
Author(s):  
DJ Cannon ◽  
JC Bath
Keyword(s):  
Birth Weight ◽  
Early Summer ◽  
The Other ◽  
Meat Production ◽  
Early Autumn ◽  
Other Hand ◽  
The Mean ◽  
Effect Of Age

Three hundred and fifty Border Leicester X Merino ewes, born March-April 1961, were drafted to two flocks, A and B. Flock A only was joined with rams on February 14, 1962. Subsequently both flocks were joined in November or December each year from 1962 to 1965. The flocks were depastured together on all occasions except for joining and lambing of flock A in 1962. There were negligible differences, between the flocks, in ewe deaths, wool cut, lambs born and reared, lamb birth weight and lamb carcase weight for the mean for the four years or in each of the years 1963 to 1966. Meat production in flock A was increased by 12 kg per ewe as a result of the extra lambing. On the other hand, 3 per cent of the ewes of flock A died in 1962 but no deaths occurred in flock B. Joining when 10-11 months old in early autumn did not disrupt the practice of joining when 20-21 months old in early summer, and, in the experiment, was the most profitable procedure.

Strategic dipping for control of the catle tick, Boophilus microplus (Canestrini), in South Queensland

1957 ◽  
Vol 8 (6) ◽  
pp. 768 ◽  
Author(s):  
KR Norris
Keyword(s):  
Early Summer ◽  
Boophilus Microplus ◽  
The Other ◽  
Effective Application ◽  
Early Autumn ◽  
Other Hand ◽  
Cattle Ticks ◽  
Cattle Herds ◽  
Critical Times

In the spring and early summer of 1953, three cattle herds in south Queensland were dipped in acaricides at intervals such that few or none of the cattle ticks (Boophilus microplus) attacking to the animals between dippings reached maturity. This was continued until the tick larvae hatching in the pastures in spring were greatly depleted in numbers, but was discontinued before they were exterminated, to avert the danger of the cattle losing their immunity to redwater fever. Throughout the rest of the summer and the early autumn these cattle were lightly infested, and required dipping relatively infrequently. On the other hand, on a property where early, intensive dipping had not been carried out, very heavy infestations of ticks were present throughout the summer and autumn in spite of monthly dippings. This procedure of relating times of dipping to the ecology of the tick has been termed "strategic dipping". In the 1954-55 season, results obtained by intensive spring and early summer dipping were not comparable with those of the 1953-54 season. This appeared to be attributable principally to delayed or relatively ineffective dippings at critical times. Effective application of strategic dipping, as during the 1953-54 season, would reduce the need for acaricidal treatment of the cattle in the summer months when dipping is likely to be delayed by rainy periods.

Effect on Polymer Chain Structure Caused by the Molar Fraction of 4-Hydroxybutyrate in Poly(3-hydroxybutyrate- co -4-hydroxybutyrate)

2012 ◽  
Vol 602-604 ◽  
pp. 776-780
Author(s):  
Zhi Qiang Li ◽  
Mei Li ◽  
Wei Jia Fan
Keyword(s):  
Molecular Weight ◽  
Intrinsic Viscosity ◽  
Polymer Chain ◽  
Molar Fraction ◽  
Chain Structure ◽  
The Other ◽  
Mean Square ◽  
Polarizing Microscope ◽  
Other Hand ◽  
The Mean

Poly(3-hydroxybutyrate-co-4-hydroxybutyrate)copolymer [P(3HB-co-4HB)] is a kind of biodegradable high molecular polymer produced by bioaccumulation. Because of the good biodegradability and biocompatibility, P(3HB-co-4HB)s have attracted wide attention . At first, the intrinsic viscosity[η] in good solvent of P(3HB-co-4HB) s with varying contents of 4HB was investigated in different temperature. Second, observed the changes of crystallization gathered state caused by the varying contents of 4HB by polarizing microscope. The results show that to the P(3HB-co-4HB)s in same molecular weight, the intrinsic viscosity[η] in good solvent barely changes when the mole fractions of 4HB increase. On the other hand, the mean square end to end distances[0] of macromolecular flexible chains increase with the mole fractions of 4HB. At the same time, the states of aggregation change from spherulites to dendrites. In this investigation, we discuss the reasons of the differences in depth.

scholarly journals Adult caddisflies (Trichoptera) attracted to artificial lights in the middle reaches of the Shinano River from 2005 to 2007

Zoosymposia ◽  
2011 ◽  
Vol 5 (1) ◽  
pp. 143-146 ◽  
Author(s):  
KIMIO HIRABAYASHI ◽  
GORO KIMURA ◽  
EISO INOUE
Keyword(s):  
Species Composition ◽  
Air Temperature ◽  
Large Scale ◽  
Abundant Species ◽  
The Other ◽  
Seasonal Abundance ◽  
Other Hand ◽  
The Mean ◽  
Summer Flood

The species composition and abundance of adult caddisflies attracted to the illuminated showcase of a vending machine set along the middle reaches of the Shinano River were investigated every Sunday night from April to November in 2005 to 2007. A total of 1,405 adult caddisflies was collected during the investigation periods. We identified a total of 13 species belonging to 11 genera of 8 families. The most abundant species was Psychomyia acutipennis (Ulmer 1908) each year. Psychomyia acutipennis adults were collected from mid-May to the beginning of October (the range of mean air temperature was 13.8 to 27.7°C), with its seasonal abundance divided into several peaks, i.e., the end of May, the beginning of June, and the end of August to the beginning of September in both 2006 and 2007. On the other hand, in 2005 when there was no large-scale summer flood and there were no marked abundance peaks. The present study suggests that the mean air temperature and summer floods impacted the seasonal abundance of P. acutipennis adults.

Allocation of Responsibility for Product Safety

1995 ◽  
Vol 39 (8) ◽  
pp. 435-439 ◽  
Author(s):  
Kenneth R. Laughery ◽  
David R. Lovvoll ◽  
Michael S. Wogalter
Keyword(s):  
Significant Interaction ◽  
User Study ◽  
Consumer Products ◽  
Product Safety ◽  
The Other ◽  
Product Use ◽  
Other Hand ◽  
High Hazard ◽  
The Mean

Three studies were carried out to explore how people allocate responsibility for safety during product use. In Study 1 29 consumer products were named and subjects apportioned safety responsibility to the manufacturer, the retailer, the user, and a potentially relevant organization not in the stream of commerce (e.g., FDA, CPSC, Underwriters Laboratories). The mean percent responsibility allocated to these four alternatives was 43%, 9%, 27% and 21% respectively. A significant interaction indicated that the allocation varied across products. In Study 2 safety responsibility for the same products was allocated to the manufacturer, retailer and user, but the “outside” organization was omitted. The mean percent allocated was 51%, 20% and 30% respectively. In this study, additional questions assessed various perceptions of the products and the subject's familiarity with the products. The results indicated that responsibility allocation was a function of perception of product hazardousness; the more hazardous a product is perceived to be, the more responsibility is allocated to the user. Study 3 investigated some of the attributes of high hazard products which are associated with various allocations of product safety. For high hazard products with open and obvious risks (chain saws, cutting torches), more responsibility was allocated to consumers as opposed to manufacturers. On the other hand, for those high hazard products with “hidden” risks (pesticides, antifreeze), manufacturers were typically allocated a much higher degree of responsibility.

Contribution to the Study of the Death-rate of Persons in Asylums

1879 ◽  
Vol 25 (109) ◽  
pp. 1-4
Author(s):  
Arthur Mitchell
Keyword(s):  
General Population ◽  
Death Rate ◽  
The Other ◽  
Other Hand ◽  
Different Ages ◽  
The Mean ◽  
General Community

In the population of Scotch Asylums, there are so few persons below the age of 10 years that, for practical purposes, it may be correctly said there are none. of the general community, on the other hand, 25·6 per cent. are persons below that age. It is clear, therefore, that the death-rate of the population of asylums cannot properly be compared with the death-rate of the general population. To make such a comparison it is necessary to deal only with the deaths occurring among the 74·4 per cent. of the general community who are above the age of 10 years. When this is done, it appears that the mean annual death-rate for the general population is 1·7 per cent. as compared with 8·3 per cent. for the population of asylums. These figures refer to the whole population of asylums, and to the whole of the general population above the age of 10 years; but in order to show the rates at which persons of different ages die in asylums, and the rates at which persons of corresponding ages die in the general community, the following table has been prepared. It is founded on 3,800 deaths occurring during the seven years, 1870–1876, in the Asylums of Scotland, which had a mean population of 6,421 during those years.

The effect of frontal eye field and superior colliculus lesions on saccadic latencies in the rhesus monkey

1987 ◽  
Vol 57 (4) ◽  
pp. 1033-1049 ◽  
Author(s):  
P. H. Schiller ◽  
J. H. Sandell ◽  
J. H. Maunsell
Keyword(s):  
Eye Movements ◽  
Superior Colliculus ◽  
Short Latency ◽  
The Other ◽  
Frontal Eye Field ◽  
Express Saccades ◽  
Unimodal Distribution ◽  
Other Hand ◽  
Eye Field ◽  
The Mean

Rhesus monkeys were trained to make saccadic eye movements to visual targets using detection and discrimination paradigms in which they were required to make a saccade either to a solitary stimulus (detection) or to that same stimulus when it appeared simultaneously with several other stimuli (discrimination). The detection paradigm yielded a bimodal distribution of saccadic latencies with the faster mode peaking around 100 ms (express saccades); the introduction of a pause between the termination of the fixation spot and the onset of the target (gap) increased the frequency of express saccades. The discrimination paradigm, on the other hand, yielded only a unimodal distribution of latencies even when a gap was introduced, and there was no evidence for short-latency "express" saccades. In three monkeys either the frontal eye field or the superior colliculus was ablated unilaterally. Frontal eye field ablation had no discernible long-term effects on the distribution of saccadic latencies in either the detection or discrimination tasks. After unilateral collicular ablation, on the other hand, express saccades obtained in the detection paradigm were eliminated for eye movements contralateral to the lesion, leaving only a unimodal distribution of latencies. This deficit persisted throughout testing, which in one monkey continued for 9 mo. Express saccades were not observed again for saccades contralateral to the lesion, and the mean latency of the contralateral saccades was longer than the mean latency of the second peak for the ipsiversive saccades. The latency distribution of saccades ipsiversive to the collicular lesion was unaffected except for a few days after surgery, during which time an increase in the proportion of express saccades was evident. Saccades obtained with the discrimination paradigm yielded a small but reliable increase in saccadic latencies following collicular lesions, without altering the shape of the distribution. Unilateral muscimol injections into the superior colliculus produced results similar to those obtained immediately after collicular lesions: saccades contralateral to the injection site were strongly inhibited and showed increased saccadic latencies. This was accompanied by a decrease of ipsilateral saccadic latencies and an increase in the number of saccades falling into the express range. The results suggest that the superior colliculus is essential for the generation of short-latency (express) saccades and that the frontal eye fields do not play a significant role in shaping the distribution of saccadic latencies in the paradigms used in this study.(ABSTRACT TRUNCATED AT 400 WORDS)

Sex Differences in Privacy Preferences

1987 ◽  
Vol 64 (3_suppl) ◽  
pp. 1239-1242 ◽  
Author(s):  
Darhl M. Pedersen
Keyword(s):  
College Students ◽  
Sex Differences ◽  
The Other ◽  
Three Dimensions ◽  
Female College Students ◽  
Female College ◽  
Privacy Preferences ◽  
Other Hand ◽  
The Mean

A Privacy Questionnaire was administered to 118 male and 142 female college students to determine differences in the patterns of privacy preferences between the sexes. The questionnaire contained factor scales for measuring six independent types of privacy. t-tests showed that the means for women were significantly higher than those for men in their preferences for Intimacy with Family and Intimacy with Friends. On the other hand, for Isolation the mean for men was significantly higher than that for women. There were no significant differences between the means for the two sexes on the remaining three dimensions, Reserve, Solitude, and Anonymity.

XLI.—The Efficiency of Metallic Filament Lamps

1910 ◽  
Vol 30 ◽  
pp. 555-561 ◽  
Author(s):  
R. A. Houstoun
Keyword(s):  
Electrical Energy ◽  
The Other ◽  
Standard Source ◽  
Initial Cost ◽  
Other Hand ◽  
Metallic Filament ◽  
The Mean ◽  
Commercial Value ◽  
Filament Lamps

Practical men are accustomed to measure the efficiency of a glow-lamp in watts per candle or, in other words, by the quantity of energy which must be supplied to it for every mean spherical candle-power of light it gives. The energy supplied is measured by an ammeter and voltmeter, and the mean spherical candle-power is obtained on the photometric bench by comparing the light given in different directions with that of some standard source. The watts per candle together with the life and initial cost of the lamp determine its commercial value.On the other hand, we may regard the lamp as an energy-transforming device, and measure its efficiency by the percentage of electrical energy it transforms into light.

The relation of weaning weight to birth weight of lambs

1955 ◽  
Vol 1955 ◽  
pp. 38-44 ◽  
Author(s):  
W. Thomson ◽  
I. McDonald
Keyword(s):  
Birth Weight ◽  
Later Life ◽  
The Other ◽  
Weaning Weight ◽  
The Past ◽  
Other Hand ◽  
Established Fact ◽  
High Level

It is now a well established fact that high-level nutrition of the in-lamb ewe during the later stages of pregnancy results in heavy lambs of high vitality at birth and in good milking ewes. On the other hand, when ewes are poorly fed during the same period, or suffer a check, they produce underweight lambs of low vitality and have poor milk yields. While it is agreed that underweight lambs are undesirable, one is often asked whether the larger and sturdier lambs at birth maintain their superiority in later life, a problem on which relatively few results have been published. A study has therefore been made of a large number of birth and weaning weights collected as a normal routine at the Rowett Institute during the past few years.

On the capture of interstellar matter by stars

1940 ◽  
Vol 36 (3) ◽  
pp. 314-322 ◽  
Author(s):  
R. d'E. Atkinson
Keyword(s):  
Radial Velocity ◽  
The Other ◽  
Interstellar Matter ◽  
Centre Of Gravity ◽  
Compelling Reason ◽  
Other Hand ◽  
The Mean ◽  
The One ◽  
The Individual ◽  
Capture Radius

The derivation given by Hoyle and Lyttleton for an accretion formula proposed by them is examined. A number of arguments against its validity are put forward, especially that on the one hand their capture radius depends on the theorem that if the velocity of certain masses of gas after collision is less than the velocity of escape at the point, they will not in fact escape, while on the other hand it is clear (and is now admitted) that the gas cannot in fact move with this velocity at all. It is also shown that since, ex hypothesi, the individual molecules will all, on the average, retain their hyperbolic velocities, there is not the compelling reason for their capture that there appeared to be in Hoyle and Lyttleton's argument, where only the mean radial velocity of the centre of gravity of the mass was considered. Further, it seems improbable that the temperature of the interstellar matter can be low enough for the initial assumptions of their theory to hold.

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