نتایج جستجو برای: neutron moderation

تعداد نتایج: 51301  

Journal: :iranian journal of radiation research 0
j.g. fantidis department of electrical engineering, technological education institute of eastern macedonia and thrace, saint loucas, kavala, greece a. antoniadis cardiovascular division, brigham and women's hospital, harvard medical school, boston, usa

background: a boron neutron capture therapy (bnct) facility, based on a dt neutron generator, with the final goal to find out a potential, alternative, solution to existing bnct treatment facilities which are based on nuclear reactors is examined. materials and methods: with the aim of the mcnp4b monte carlo code different beam-shaping assembly (bsa) configurations were considered. lead was sel...

Journal: :Physica Medica 2021

The Kansai BNCT Medical Center has a cyclotron based epithermal neutron source for clinical Boron Neutron Capture Therapy. system accelerates proton to an energy of 30 MeV which strikes beryllium target producing fast neutrons are moderated down use. While studies in the past have shown be highly effective malignant melanoma skin, apply superficial lesions using this it is necessary shift therm...

Journal: :international journal of nanoscience and nanotechnology 2013
sh. sohrabnezhad* d. rezaei ochbelgh n. morsali golboos

in this research, cobalt and nickel sulfide nanoparticles (nps) were grown on almcm-41 matrix by using ion exchange method. the prepared samples were irradiated by thermalized neutron that emitted from am-be source up to fluencies (7.9+e9n/cm2). after that, x-ray diffraction (xrd), uv-vis spectroscopy, fourier transform infrared (ftir), scanning electron microscopy (sem) and transmission electr...

2012
Andrew F. Hayes

Statistical mediation and moderation analysis are widespread throughout the behavioral sciences. Increasingly, these methods are being integrated in the form of the analysis of ―mediated moderation‖ or ―moderated mediation,‖ or what Hayes and Preacher (in press) call conditional process modeling. In this paper, I offer a primer on some of the important concepts and methods in mediation analysis...

Journal: :Psychological methods 2007
Jeffrey R Edwards Lisa Schurer Lambert

Studies that combine moderation and mediation are prevalent in basic and applied psychology research. Typically, these studies are framed in terms of moderated mediation or mediated moderation, both of which involve similar analytical approaches. Unfortunately, these approaches have important shortcomings that conceal the nature of the moderated and the mediated effects under investigation. Thi...

Journal: :Jurnal Transformatif (Islamic Studies) 2022

This study aims to determine the religious moderation hadith that focuses on tolerance between communities, asbab al wurud and relevance of moderated in Indonesia. The type research used is library or research. Primary sources are books Bukhari, Muslim, Musnad Ahmad. data analysis technique inductive descriptive analytic. results show Prophet Muhammad SAW, there traditions which also practiced ...

ژورنال: سنجش و ایمنی پرتو 2020

Neutron Generators (NG) are used as a neutron source for different applications. During recent years, major efforts are underway to develop a high yield compact NG. In this way, radiation protection aspects need to be considered during the operation of these high yield NGs. In this paper the neutron effective dose of a NG operator has been calculated using MCNPX Monte Carlo code. The results sh...

2007
Andrew B. Whinston Hong Xu Jianqing Chen

Online communities provide a social sphere for people to share information and knowledge. While information sharing is becoming a ubiquitous online phenomenon, how to ensure information quality or induce quality content, however, remains a challenge due to the anonymity of commentators. This paper introduces moderation into reputation systems. We show that moderation directly impacts strategic ...

Journal: :Computers in Human Behavior 2011
Christa S. C. Asterhan

The role of the human instructor in online learning has received increasingly more attention in the elearning literature. In the present paper we focus on the particular case of human moderation of peerto-peer debates in educational settings. A multi-dimensional methodology is proposed to identify and characterize different moderation styles in such settings. The method triangulates superficial...

Journal: :Psychological methods 2001
C M Judd D A Kenny G H McClelland

Analyses designed to detect mediation and moderation of treatment effects are increasingly prevalent in research in psychology. The mediation question concerns the processes that produce a treatment effect. The moderation question concerns factors that affect the magnitude of that effect. Although analytic procedures have been reasonably well worked out in the case in which the treatment varies...

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