General characterization of Antarctic micrometeorites collected by the 39th Japanese Antarctic Research Expedition: Consortium studies of JARE AMMs (III)

From November 1998 to January 1999,the 39th Japanese Antarctic Research Expedition (JARE-39) undertook Japanese first large-scale collection of Antarctic micrometeorites (AMMs), with sizes larger than 10μm, at the Meteorite Ice Field around the Yamato Mountains in Antarctica (at three different locations, for a total of 24 collection sites). The number of collected AMMs larger than 40μm is estimated to be about 5000. Here we present the general characterization (i.e., micro-morphology and surface chemical composition using SEM/EDS) of ∿810 AMMs chosen from 5 of the 24 sites. Additionally, the mineral composition of 61 out of 810 AMMs was determined by Synchrotron X-ray radiation. Preliminary results on mineralogical and chemical compositions show similarities with that of previous studies, even though a pronounced alteration of some AMMs is noticed. A correlation is found between the Mg/Si ratio at the sample\u27s surfaces of unmelted AMMs and the age of snow/ice in which the AMMs are embedded

Research Integrity and Security : Stakeholder analysis on discourse relations and shared responsibilities in international research collaborations

一般講演要

Research integrity and misconduct in the academic profession

Integrity in research is fundamental to the advancement of knowledge, for the public’s support of research, and the autonomy of the academic profession. Misconduct in the forms of fabrication, falsification, and plagiarism introduces error and misrepresentation into the scientific record. This chapter reviews the history of research integrity and misconduct in the United States, as well as the nature and prevalence of misconduct. It then turns to factors associated with misconduct and efforts to promote integrity, which include policy and regulation, normative pressure, codes of conduct, training, and mentoring

Short-time-scale threshold voltage shifts in organic field-effect transistors caused by dipoles on insulator surface

AbstractWe previously reported that dipoles on the surface of the gate insulator layer in organic transistors cause time decay of the drain current on time scales of less than 0.1s from the application of the gate voltage. In this study, we investigated the relationship between the time decay and magnitude of the gate voltage. We found that this time decay can be attributed to threshold voltage shifts unaccompanied by mobility changes. When the insulator surface has dipoles that can move somewhat, the threshold voltage shift has two components: one with a time scale of approximately 0.1s and the other with a time scale of tens of minutes

Synthesis of 2,4-Diphenyl-1,3-dimethyl-1H-pyrrolo[2,3-d]pyridazines

Reaction of 4-benzoyl-3-methyl-2-phenyl-N-methylpyrrole with hydrazine dihydrochloride in the presence of either arylaldehyde or paraformaldehyde gave 7-aryl-2,4-diphenyl-1,3-dimethyl-IH-pyrrolo-[2, 3-d]pyridazines or the 7-unsubstituted derivative via the corresponding 6, 7-dihydro compounds

Synthesis of 2,4-Diphenyl-1,3-dimethyl-1H-pyrrolo[2,3-d]pyridazines

Reaction of 4-benzoyl-3-methyl-2-phenyl-N-methylpyrrole with hydrazine dihydrochloride in the presence of either arylaldehyde or paraformaldehyde gave 7-aryl-2,4-diphenyl-1,3-dimethyl-IH-pyrrolo-[2, 3-d]pyridazines or the 7-unsubstituted derivative via the corresponding 6, 7-dihydro compounds