Population mean

We study the dynamics of a double-well BEC system subjected to oscillating dissipation. The macroscopic model is described within the mean-field approximation while the noise effect due to large reservoir fluctuation has been averaged out to zero. We chose a simple dissipative memory kernel to produce a time-dependent oscillating dissipation. Our numerically calculated phase-space portraits and Lyapunov exponents show an enhanced route to chaos as one increases the driving dissipation amplitude.

14p dianmotminh02 03-05-2024 1 1   Download

This study summarizes a sample of the managers of the Iraqi cellular communications company with 84 employees. The company is a service organization responsible for providing integrated telecommunications services. As a management system that uses human, technical, material and financial resources, its size and value increase in line with technical progress. The demand for telecommunication services is increasing for several factors, the most important being the only means available to the majority and to the increase in population.

6p longtimenosee10 26-04-2024 1 1   Download

Ebook "Selection methods in plant breeding (2nd edition)" considers consequently only the genetic efficiency, i.e. the rate of progress to be expected when applying a certain selection procedure. This means, in fact, that the breeder should be able to develop population genetic and quantitative genetic models that describe the observed mode of inheritance as satisfactorily as possible.

462p tachieuhoa 28-01-2024 4 2   Download

Ebook Economic development (Fourth edition): Part 1 include of the following contents: Chapter 1 introduction; chapter 2 the meaning and measurement of economic development; chapter 3 economic development in historical perspective; chapter 4 characteristics and institutions of developing countries; chapter 5 theories of economic development; chapter 6 poverty, malnutrition, and income inequality; chapter 7 rural poverty and agricultural transformation; chapter 8 population and development; chapter 9 employment, migration, and urbanization; chapter 10 education, health, and human capital; ch...

489p haojiubujain02 03-07-2023 3 1   Download

Ebook Introductory statistics: Part 2 includes the following content: Chapter 9 hypothesis tests about the mean and proportion, chapter 10 estimation and hypothesis testing: two populations, chapter 11 chi-square tests, chapter 12 analysis of variance, chapter 13 simple linear regression, chapter 14 multiple regression, chapter 15 nonparametric methods, appendix a sample surveys, sampling techniques, and design of experiments, appendix b explanation of data sets, appendix c statistical tables.

336p haojiubujain01 24-06-2023 8 5   Download

Gay, bisexual, and other men-who-have-sex-with-men (GBMSM) continue to be disproportionately affected by Human Immunodeficiency Virus (HIV). Although HIV pre-exposure prophylaxis (PrEP) ofers an effective means of reducing incident HIV among this population, the HIV-preventive success of oral-based PrEP is contingent upon regimen adherence

10p viferrari 29-10-2022 7 2   Download

Lecture Probability Theory - Lecture 5: Function of a Random Variable. Let Y be a random variable, discrete and continuous, and let g be a function from R to R, which we think of as a transformation. For example, Y could be a height of a randomly chosen person in a given population in inches, and g could be a function which transforms inches to centimeters, i.e. g(y) = 2.54 × y. Then W = g(Y) is also a random variable, but its distribution (pdf), mean, variance, etc. will differ from that of Y.

20p cucngoainhan0 10-05-2022 11 1   Download

Most older people with disabilities or illnesses continue to use long-term care (LTC) services for the rest of their lives. However, disasters can cause a discontinuation of LTC services, which usually means tragic outcomes of affected persons. In view of the recent progression of population aging and the increase in natural disasters, this study focuses on the impact of disasters on older people’s discontinuation of LTC services, and those more risk of such discontinuation than others. However, current evidence is scarce.

13p vinobelprisen 26-03-2022 11 4   Download

During the last decade, the analysis of ancient DNA (aDNA) sequence has become a powerful tool for the study of past human populations. However, the degraded nature of aDNA means that aDNA molecules are short and frequently mutated by post-mortem chemical modifications.

18p viarchimedes 26-01-2022 7 0   Download

The six populations (parents, F1, backcrosses and F2) of the two wheat crosses, Gemmeiza 9 · IL1 (C1) and Sids 1 · IL2 (C2) were grown under normal irrigation (N) and drought stress (D) at the farm of Faculty of Agriculture, Sohag University, Egypt to study the genetic background of drought stress tolerance. Genetic variation was found for No.

8p schindler 30-12-2021 12 0   Download

Earthworms are present in all types of soil. Changes in land use influence populations of earthworms. However, information on the dynamics of earthworm populations in northern Cameroon is not available. This paper highlights the research carried out on the abundance, biomass, and diversity of earthworm populations throughout four types of land use in northern Cameroon. Earthworms were sampled throughout the rainy season in three regions, across pastures, woody savannahs, grass savannahs, and fields, using formaldehyde and hand sorting.

11p dolomite36 30-12-2021 6 0   Download

Variations in the population of lancelets inhabiting Chabahar Bay were surveyed statistically. Multivariate analysis of the Iranian Branchiostoma population using 5 morphometric characteristics indicates no separation of populations by locality in the study area (ANOSIM global; R = 0.2). Principal component analysis of the mean values of the 5 meristic characteristics of the present population with those of conspecifics of other populations around the world showed that Iranian lancelet populations are very similar to B. lanceolatum and completely different from the B. arabia and B.

8p dolomite36 30-12-2021 8 0   Download

The invasive brown bullhead (Ameiurus nebulosus (Lesueur, 1918)) has been present in Europe since the late 19th century, but there is still a lack of reliable information about its distribution in Europe and the condition of its population. A long-term study (from 2000 to 2011) in three shallow lakes in Central Europe (eastern Poland) was carried out to determine the occurrence of the brown bullhead and its participation in the fish community. The brown bullhead was present in almost all the sampling fishing in all the lakes studied (Ci = 72%–82%).

11p dolomite36 30-12-2021 9 0   Download

In a moss sample collected from Mount Kulal in Kenya, a new population of Mesobiotus radiatus was found. Given that the original description of M. radiatus was based solely on the morphology observed by light microscopy and measurements based mostly on a single individual, here we describe the new population by means of integrative taxonomy and a large sample size.

18p dolomite36 30-12-2021 6 0   Download

Stone moroko (Pseudorasbora parva) is considered to be one of the most invasive fishes, dispersing rapidly all over Europe and also in the freshwaters of the Baltic Sea basin. A recent survey carried out in the catchment of the lower part of the Odra River (Poland) in 2015 and 2016 revealed a large new population of stone moroko, which had colonized the creek Wardynka.

12p dolomite36 30-12-2021 10 0   Download

We tracked yearly variation in breeding phenology in relation to weather parameters in a common European toad population from the southeastern part of its range. Phenological data were collected from 2001 to 2003 and from 2011 to 2017 and compared to open-access daily weather data from a nearby weather station. Data analysis revealed no significant effect of weather on initiation of breeding and a negative relationship between mean daily humidity and mean cloud cover on the duration of breeding season (P = 0.03).

7p dolomite36 30-12-2021 8 0   Download

Sequences of the mitochondrial cytochrome oxidase I (COI) gene of one Greek and 25 Turkish Myzus cerasi (Fabricus) (Hemiptera: Aphididae) populations collected from Prunus avium and Prunus cerasus were analyzed. The partial coding region of COI studied is 605 bp for all the populations, from which 565 nucleotides were conserved, 40 were variable, 37 were singleton, and 3 were parsimony-informative. Four haplotypes were identified based on nucleotide substitutions and the mean of intraspecific divergence was calculated to be 0.3%.

10p dolomite36 30-12-2021 19 0   Download

The age and growth in two breeding populations of A. danfordi, inhabiting altitudes ranging from 678 m a.s.l. to 1200 m a.s.l. in Turkey, were investigated. The age differences between sexes were not statistically significant in either population. The mean age was calculated as 8.73 ± 2.12 and 8.33 ± 1.8 years in Kozan and 7.25 ± 1.58 and 5.78 ± 1.64 years in Saimbeyli for males and females, respectively. The age distributions of males did not statistically differ between populations, but females in Kozan were significantly older than those in Saimbeyli.

8p dolomite36 30-12-2021 6 0   Download

The species could survive there and regular reports in the press (e.g., road kills) indicate that the species is still widespread and not extremely rare. Several animals were confirmed to live in a nature reserve established for the protection of Striped Hyaenas in the Hatay province. Altogether, the present-day distribution range of the Striped Hyaena in Turkey is split into two parts: a highly threatened relict populations in the west and a larger, slightly less threatened population in the southeast.

14p dolomite36 30-12-2021 7 0   Download

Medicago ciliaris (L.) Krock and Medicago intertexta (L.) Mill are most often found in saline regions and are considered as potential resources for genes related to salinity resistance. To explore the genetic diversity of these two species by mean of nrSSR (simplesequence repeats) markers, 11 accessions originated from different regions in north of Africa and Middle East were chosen. Ten among 14 markers turned out to be polymorphic and gave 72 alleles. Eight markers were very informative with PIC values > 0.5, and three of them were found to be nonneutral.

12p tudichquannguyet 29-11-2021 7 1   Download