Control laws to improve efficiency and average life time of an adaptive multi-phases Control laws to improve efficiency and average life time of an adaptive multi-phases

2011 ◽  
pp. 1429-1434 ◽  
Author(s):  
A. Berasategi ◽  
Y. El Basri ◽  
C. Cavals ◽  
B. Estibals ◽  
M. Vermeersch ◽  
...  
Keyword(s):  
Life Time ◽  
Average Life ◽  
Control Laws ◽  
Improve Efficiency

Nuovi dati desunti dallo spoglio di un archivio parrocchiale di tre secoli

1963 ◽  
Vol 12 (1) ◽  
pp. 85-90
Author(s):  
L. Gandini
Keyword(s):  
Small Group ◽  
Life Time ◽  
Italian Population ◽  
Multiple Pregnancies ◽  
Average Life ◽  
Long Life ◽  
The Moment ◽  
Life Factor

SUMMARYIn this work the author by making use of parochial archives in Busnago (Milan) has controlled the long life proceeding of 187 among the 259 twins-pairs numbered during a period of three centuries (1632-1962). The author has verified the mothers' age at the moment of childbirth.He has been able to point out a greatest concordance in the average life time of the MZ pairs in comparison with the DZ ones, which agrees with the hypothesis of a genetic long life factor. The mothers' average age, studied on a small group of population during a period of three centuries resulted, in the 159 cases the author could peruse, to be from 30 to 35 years, of age in agreement with the data collected by Gedda on the global Italian population during short periods of time.This average age supports the hypothesis that among the factors of multiple pregnancies may be numbered besides mothers' age a geographic (racial) variability.

Attenuation of nursing-related ovarian suppression and high fertility in well-nourished, intensively breast-feeding Amele women of lowland Papua New Guinea

1993 ◽  
Vol 25 (4) ◽  
pp. 425-443 ◽  
Author(s):  
Carol M. Worthman ◽  
Carol L. Jenkins ◽  
Joy F. Stallings ◽  
Daina Lai
Keyword(s):  
Reproductive Function ◽  
Life Time ◽  
Natural Fertility ◽  
Ovarian Activity ◽  
High Fertility ◽  
Average Life ◽  
Birth Intervals ◽  
Equivalent Age ◽  
Reproductive Life ◽  
Reproductive Life Span

SummaryIntense, sustained nursing lengthens inter-birth intervals and is causally linked with low natural fertility. However, in traditional settings, the effects of such nursing on fertility are difficult to disentangle from those of nutrition. Results from an prospective, direct observational study of reproductive function in well-nourished Amele women who nurse intensively and persistently but who also have high fertility are here presented. Endocrine measures show that ovarian activity resumes by median 11·0 months postpartum. Median duration of postpartum amenorrhoea is 11·3 months, time to next conception is 19·0 months, and the inter-birth interval is 28·0 months. Average life time fertility is 6·8. High fertility in Amele women is due both to refractoriness of reproductive function to suckling stimuli, and to maintenance of equivalent age-specific fertility rates across the reproductive life span.

A STOCHASTIC MODEL FOR THE SPREADING OF AN IDEA IN A HUMAN COMMUNITY

2012 ◽  
Vol 17 ◽  
pp. 83-93
Author(s):  
FREDERIK W. WIEGEL
Keyword(s):  
Stochastic Model ◽  
Transition Probabilities ◽  
Life Time ◽  
Auxiliary Variable ◽  
Function Technique ◽  
Single Individual ◽  
Average Life ◽  
Human Community ◽  
Dimensionless Constant ◽  
The Moment

We call an idea "alive" in a human community of N individuals, if at least one of them accepts it. Such an individual will create "copies" of this idea; any such free-floating copy has a probability to be accepted by any other individual. In this way the idea can spread through the community. The opposite processes can also occur: somebody can drop a previously held notion; any free-floating copy of an idea can be annihilated (newspapers get thrown away, for example). We present a simplified stochastic model for these processes. The various transition probabilities combine into a single, dimensionless constant. A generating function technique is used to formulate the dynamics of the model in terms of a partial differential equation, which is first order in the time variable and second order in the auxiliary variable. Using this equation we calculate exactly the average life-time of an idea (the time between the moment the idea is "born" in a single individual, and the moment the idea goes extinct because it is dropped by the last person who still accepted it). This average life-time is a function of the dimensionless constant and N. It has a quite different form for the three basic cases in which the product of the dimensionless constant and N-1 is larger than, equal to, or smaller than unity. In the last section various extensions and relevant questions are discussed in a qualitative way.

scholarly journals THE PROTECTABILITY OF BLOCK COVERINGS OF INDUSTRIAL BUILDINGS WITH DEFECTIVE LOAD-BEARING STRUCTURES FROM PROGRESSIVE COLLAPSE

Vestnik MGSU ◽  
2015 ◽  
pp. 16-27 ◽  
Author(s):  
Gevorg Harutyunovich Harutyunyan
Keyword(s):  
Statistical Data ◽  
Progressive Collapse ◽  
Life Time ◽  
Industrial Building ◽  
Average Life ◽  
Metal Structures ◽  
Industrial Structures ◽  
Industrial Buildings ◽  
Operation Duration ◽  
Safety Operation

Beginning with the 20th century metal structures are widely used in the construction branch in Russia. The reason for it was in the development of calculation methods of structures. Beginning with 1930 and till now a substantial number of the industrial buildings (about 90 %) of production plants have been built of metal structures. The essential part of them - 20…60 % of the whole volume - has block coverings consisting of bearing and braced elements. At the present time the data on the operation duration of industrial structures is not systemized throughout Russia. This data may serve as one of characteristic factors for estimating safety operation level, because while the operation term increases, the wear also increases (mechanical damages), which influences the bearing capacity of the structures. The following article examines the collapse of industrial building coverings that may be accompanied not only by material losses, but also by fatal accidents. Statistical data of damageability of trusses and their elements are presented; the consequences of collapse are examined. The average life time of trusses is determined which is serving as a criteria that characterizes damage accumulation. The nature of the collapse of block coverings is revealed which, in most cases, may be classified as progressive.

scholarly journals A Two-Parameter Quasi Lindley Distribution in Acceptance Sampling Plans from Truncated Life Tests

2019 ◽  
pp. 39-47
Author(s):  
Amer Ibrahim Al-Omari ◽  
Amjad Al-Nasser
Keyword(s):  
Life Time ◽  
Acceptance Sampling ◽  
Average Life ◽  
Sampling Plans ◽  
Lindley Distribution ◽  
Confidence Levels ◽  
Operating Characteristic Function ◽  
Acceptance Sampling Plans ◽  
Life Tests ◽  
Two Parameter

In this paper, acceptance sampling plans are developed when the life test is truncated at a pre-assigned time. For different acceptance numbers, confidence levels and values of the ratio of the fixed experiment time to the specified average life time, the minimum sample sizes required to ensure the specified average life are calculate assuming that the life time variate of the test units follows a two-parameter Quasi Lindley distribution (QLD(2)). The operating characteristic function values of the new sampling plans and the corresponding producer's risk are presented.

scholarly journals Effects of Heifer Calving Date on Longevity and Lifetime Productivity in Western Canada

2018 ◽  
Vol 7 (4) ◽  
pp. 11 ◽  
Author(s):  
Daalkhaijav Damiran ◽  
Kathy Larson ◽  
Leah Pearce ◽  
Nathan Erickson ◽  
H. A. Lardner
Keyword(s):  
Life Time ◽  
Pregnancy Rates ◽  
Production Data ◽  
Western Canada ◽  
Average Life ◽  
Weaning Weight ◽  
Time Production ◽  
Period 2 ◽  
Calving Season ◽  
Second Period

The objective of this study is to determine the effect of calving early as a heifer on lifetime production in western Canada. This study evaluated the longevity and life time production data on 211 individual heifers (data gathered for 16 years) at the Western Beef Development Centre (WBDC), Saskatchewan. Heifers were classified as calving in the first (period 1; n= 87), second (period 2; n = 66), or third (period 3; n = 58) 21-day period of the calving season. For each subsequent calf born to the cow, calving period was reassigned in the same manner. The current study showed that the average life time number of calves weaned for heifers that calved in the 1st, 2nd, and 3rd 21-day period was 5.4 ± 0.32, 4.5 ± 0.37, and 4.2 ± 0.39, respectively. Retaining percentage rate of period 1 cows was 4.3-17.8 and 2.1-19.1% units greater than those of period 2 and period 3 cows, respectively. Period 1 heifers had the greatest life time produced total cumulative weaning weight (p <0.01) value of 1157 kg/cow, followed by period 2 and period 3 heifers, 947 and 841 kg/cow, respectively. Period 1 cows generated an additional $718 to $1077 in weaned calf revenues over their lifetime. This study suggested that, in western Canada, heifers that calved earlier had greater pregnancy rates, remained in the herd longer, and produced one more calf in their lifetime than those that calved in the later periods.

scholarly journals EAG Responses Increase of Spodoptera littoralis Antennae after a Single Pheromone Pulse

2014 ◽  
Vol 9 (8) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Carmen Quero ◽  
Berta Vidal ◽  
Angel Guerrero
Keyword(s):  
Olfactory Receptor ◽  
Spodoptera Littoralis ◽  
Antennal Lobe ◽  
Life Time ◽  
Olfactory Receptor Neurons ◽  
Average Life ◽  
Antennal Response ◽  
Behavioral Sensitivity ◽  
Response Increase ◽  
Receptor Neurons

Increased behavioral sensitivity to the pheromone after brief exposure of the whole insect to the sex pheromone has been documented in antennal lobe neurons of Spodoptera littoralis. We investigated whether a brief stimulus of the major component of the pheromone on naïve antenna separated from the head increased the electroantennographic responses after successive stimulations at different times. The response increase was clear 30 min after the first stimulation, and this effect lasted at least 60 min, the average life time of the antenna. Our results suggest that the olfactory receptor neurons, and not only the neurons in the antennal lobe, may be involved in the increased antennal response after a single pheromone pulse.

Comparative reproductive performance of Brahman and Santa Gertrudis cattle in a hot humid environment 2. Factors affecting calving interval

1974 ◽  
Vol 18 (1) ◽  
pp. 43-48 ◽  
Author(s):  
A. Wilson ◽  
M. B. Willis
Keyword(s):  
Reproductive Performance ◽  
Life Time ◽  
Calving Interval ◽  
Average Life ◽  
Factors Affecting ◽  
Humid Environment ◽  
Calving Intervals

SUMMARYOver a 15-year period 1011 calving intervals from 187 Brahman (B) cows and 687 calving intervals from 146 Santa Gertrudis (SG) were examined. Year of calving significantly affected intervals in both breeds. Season of calving and parity of dam were both important in SG. Longer intervals were seen in B than SG (437 v. 406 days). Repeatability of calving interval was low (< 0·02). The average life-time calving interval was significantly related to total calf production in that cows with shorter mean intervals had more calves in their lifetime.

Sign in / Sign up

Export Citation Format

Share Document