Search results for "determination"

Meaningfulness as a Resource to Mitigate Work Stress

2014

SEQUENTIALLY ADJUSTED RANDOMIZATION TO FORCE BALANCE IN CONTROLLED TRIALS WITH UNKNOWN PREVALENCE OF COVARIATES: APPLICATION TO ALCOHOLISM RESEARCH

2005

In treatment outcome studies with small to medium sample sizes (n200), the balance of groups with regard to important factors, which sometimes occur at low prevalence, is indispensable for adequate interpretation. This study tested a method for use in clinical alcoholism research, an uncomplicated procedure for satisfactory randomization of patients to different treatments, taking into account relevant background variables.An easily applicable modification of Efron's biased coin method for the randomization of treatments within strata of unknown but low prevalence was compared with the original approach and alternative methods by computer simulation (10,000 runs). An application example for…

Report of a european collaborative exercise comparing DNA typing results using a single locus VNTR probe

1991

A collaborative exercise was carried out in 1989 among 12 European forensic laboratories using the single locus VNTR probe pYNH24, the restriction enzyme HinfI, the same set of human genomic DNA samples, and a standardized DNA size marker. The objectives of the exercise were: (1) to study the degree of variation within and between laboratories, (2) to obtain information on requirements for technical standardization allowing the exchange of typing results and (3) to compare different approaches for the identification of allelic DNA fragments of unknown size. Each laboratory carried out up to 10 independent typing experiments using the same DNA samples. The results were analysed independently…

Connecting temporal identity to mitosis: the regulation of Hunchback in Drosophila neuroblast lineages.

2006

Both in vertebrates and invertebrates, neural stem cells generate different cell types at different times during development. It has been suggested that this process depends on temporal identity transitions of neural progenitors, but the underlying mechanism has not been resolved, yet. Recently, Drosophila neuroblasts (NBs) have been shown to be an excellent model system to investigate this subject. Here, changes in temporal identity are regulated by sequential and transient expression of transcription factors in the NB, such as Hunchback (Hb) and Kruppel (Kr). The temporal expression profile is maintained in the progeny. Hb is expressed first and thus defines the earliest identity in a giv…

Estimating soil loss of given return period by USLE-M-type models

2020

Many field investigations have clearly shown that rare and severe events control total soil erosion occurring over a long time period with up to 92% of total soil erosion over a 7‐year period resulting from just three daily events. Therefore, soil conservation strategies should be developed taking into account large events rather than long‐term average erosion. From an engineering point of view, establishing the soil loss of a given return period is needed. This can be obtained by the frequency analysis of soil loss measurements or by suitable soil erosion models. The USLE‐M modified and USLE‐M based are two empirical Universal Soil Loss Equation‐Modified (USLE‐M) type models which were dev…

Recensione di G. Giaimo, La volontà e il corpo, Giappichelli, Torino, 2019, pp. 224

2021

Il contributo recensisce il volume di G. Giaimo, La volontà e il corpo, Torino, 2019, mettendo in evidenza i diversi temi trattati e l'approccio dell'analisi. The contribution reviews the volume by G. Giaimo, La volontà e il corpo, Turin, 2019, highlighting the different themes dealt with and the analysis approach.

Non-response bias as a likely cause of the association between young maternal age at the time of delivery and the risk of cancer in the offspring.

2003

Some epidemiological studies have shown an association between young maternal age at the time of delivery and risk of cancer in the offspring. In a recent German case-control study, there was a twofold increase in the leukaemia risk for children whose mothers were aged < 20 years at the time of delivery. As the prevalence of younger mothers among control families was particularly low, data on maternal age distributions for the general population of Germany were obtained in order to examine the representativeness of the control sample. Despite the excellent sampling frame based on data from complete and up-to-date population registries and a satisfactory response rate among controls ( approx…

Annexation of Crimea – seizure of territories without a declaration of war: realities of the 21st century

2020

The thesis focuses on the main international legal aspects of the annexation by one State, namely the Russian Federation, of a part of another sovereign State, Ukraine. The annexation of the Crimean Peninsula is the first forced border shift of a State in Europe. The invading State justifies these actions by referring to the ethnic and historical ties between Russia and Crimea, basing its aggression on the right of peoples to self-determination. The peaceful coexistence of States and various nationalities within the European Union, the United States, Asia and the Middle East is now under threat. This Bachelor thesis aims to study the issue of the forcible seizure of the Crimean Peninsula, t…

An experimental investigation of claimed self-handicapping strategies across motivational climates based on achievement goal and self-determination t…

2020

The purpose of the present experiment was to investigate whether the motivational climates (MCs) drawn from achievement goal and self-determination theories would affect perceived competence and the use of claimed self-handicapping. Specifically, this study examined the effects of performance MC, mastery MC and need-supportive MC on these two variables. In the context of high school physical education, 37 participants had the opportunity to claim handicaps before performing an isometric resistance task in a given MC. This procedure was repeated three times at one-week intervals so that all participants were assigned to each of the three MCs. Consistent with our hypotheses, students claimed …

Statistical validation of simulation models of observable systems

2003

In this paper, for validating computer simulation models of real, observable systems, an uniformly most powerful invariant (UMPI) test is developed from the generalized maximum likelihood ratio (GMLR). This test can be considered as a result of a new approach to solving the Behrens‐Fisher problem when covariance matrices of two multivariate normal populations (compared with respect to their means) are different and unknown. The test is based on invariant statistic whose distribution, under the null hypothesis, does not depend on the unknown (nuisance) parameters. The sample size and threshold of the UMPI test are determined from minimization of the weighted sum of the model builder's risk a…