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First Moment (first + moment)

Distribution by Scientific Domains

Chemistry	40%

Selected Abstracts

Day-of-the-Week Effect in High Moments

FINANCIAL MARKETS, INSTITUTIONS & INSTRUMENTS, Issue 3 2005
by Dan Galai
C14; C31; G14 Evidence from equity markets worldwide indicates that the Day-of-the-Week anomaly appears to fade from the first moment of the distribution of daily returns. We report highly significant pair-wise weekend effects in high moments when comparing the first and last trading days of the week. The second moment alone appears to distinguish the return distribution of the first trading day from all others. A probable explanation of the phenomena appears to be information dissemination: corporate announcements released after closing of the last trading day of the week spill-over to the opening of the first trading day, increasing its variability and carrying the closing sign. [source]

Spatial distributions of mean age and higher moments in steady continuous flows

AICHE JOURNAL, Issue 10 2010
M. Liu
Abstract Transport equations and boundary conditions for spatial distribution of age moments in steady continuous flows are derived. Mean age is the first moment. The coefficient of variation is obtained from the second moment. Mixing-cup averaged mean age and higher moments across the exit plane are identical to the corresponding moments of the residence-time distribution. Numerical solutions for a 2-D (two-dimensional) reactor are studied and compared with those from a transient tracer equation. Agreement is excellent. Local tracer distribution function curves reveal that mean age is located on the long tail for both convection dominated short circuiting paths and diffusion dominated dead zones. Computing cost for the mean age and higher moment equations is orders of magnitude lower than that for the transient tracer concentration equation, making this mean age method an efficient tool to study mixing in steady continuous flow systems. © 2010 American Institute of Chemical Engineers AIChE J, 2010 [source]

Massive trauma and the healing role of reparative justice

JOURNAL OF TRAUMATIC STRESS, Issue 5 2009
Yael Danieli
In this article, the author focuses on victims/survivors' experiences of justice processes after massive trauma. Reparative justice insists that every step throughout the justice experience,from the first moment of the court's encounter with a potential witness, to the follow-up of witnesses after their return home, to the aftermath of the completion of the case,presents an opportunity for redress and healing. Conversely, this experience may present a risk of missing opportunities for healing and reintegrating victims into their societies, or, worse, (re)victimizing and (re)traumatizing them. Although restitution, rehabilitation, or compensation may come only after this process has concluded, opportunities exist throughout. Although not sufficient in itself, reparative justice is a necessary component among the healing processes after massive trauma. [source]

Synthesis of 1-amino-2-methylindoline by Raschig process: Parallel reactions, modeling, and optimization

INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, Issue 10 2002
M. Elkhatib
The reaction between chloramine and 2-methylindoline was studied at pH 12.89, T = 40°C, and for different initial concentrations of reactants. The interaction includes two concurrent bimolecular mechanisms leading to 1-amino-2-methylindoline and 2-methylindole. The rate laws were determined at the first moments of the reaction by using a differential method. By considering the totality of the reactions that occur in the medium, an appropriate mathematical model was developed. It permits to follow the evolution of the system over time and to calculate the final yields of reaction products. An optimization in terms of the initial contents of 2-methylindoline and chloramine was performed. It indicated that the maximum yield of 1-amino-2-methylindoline does not exceed 56%. The results show the limit of the Raschig process for the synthesis of indolic hydrazines in aqueous medium. © 2002 Wiley Periodicals, Inc. Int J Chem Kinet 34: 575,584, 2002 [source]

General principles regarding the use of adult stem cells

CELL PROLIFERATION, Issue 2008
I. Carrasco de Paula
In the vast world of scientific investigation, few disciplines can boast of having realized documents of such ethical rigour, and respect for the integrity and intrinsic value of the human person has been one of the cardinal principles of the researcher. Research is intrinsic to the medical profession; the reward of research is knowledge and its techniques are ordered towards maintenance of human health. Since this end concerns human beings, it demands an extremely rigorous ethical approach. Ethical aspects are present from the first moments of the experimental project and occur on three levels: choice of the objectives, selection and use of the appropriate means for the study, and application of resultant new discoveries. Today, our moral attention cannot be reduced to a cost,benefit analysis. Biomedical sciences and medicine have overlapping areas of interest that can be sources of tension: the good of the subject versus scientific utility; profit versus complexity of research; liberty versus ethical and juridical bonds; the public versus the private; and the individual versus the community. Here, I attempt to formulate some essential principles that should guarantee humane measures for research on humans. [source]