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NC 선반에서 직선 사이클 평면 위치결정 정도 측정 시스템의 구성
김영석,김재열,송인석,곽이구,정정표,한지희 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
It is very important to measure linear cycle plane positioning accuracy of NC lathes as they affect those of all other machines machined by them in industries. For example, if the linear cycle plane positioning accuracy of each, axes directions is had, the accuracy of works will be wrong and the change-ability will be bad in the assembly of machine parts. In this paper, computer software systems are organized to measure linear displacements of ATC(Automatic tool changer) of NC lathes using linear scale and time pulses comming out from computer in order to get data at constant time intervals from the sensors. And each sets of error data gotten from the test is expressed to plots by computer treatment and the results of linear cycle plane positioning error motion estimated to numerics by statistical treatments.
NC 선반의 직선 사이클 평면 위치결정 정도 측정에 관한 연구
김영석,송인석,정정표,한지희,윤원주 한국공작기계학회 2003 한국생산제조학회지 Vol.12 No.2
It is very important to measure linear cycle plane positioning accuracy of NC lathe as it affects all other parts of machines machined by them in industries. If the plane positioning accuracy of NC lathe is bad, the dimension accuracy and the change-ability of works will be bad in the assembly of machine parts. In this paper, computer software systems are organized to measure linear cycle plane positioning displacements of ATC(Automatic tool changer) on zx plane of NC lathe using two linear scales and the time pulses comming out from computer in order to get data at constant time intervals from the linear scales. And each sets of error data obtained from the test is discripted to plots and the results of linear cycle plane positioning errors are expressed as numerics by computer treatment.
Lee, Eun Young,Lee, Sena,Rho, Semi,Kim, Jae-Ouk,Choi, Seuk Keun,Lee, Young Jin,Park, Joo Young,Song, Manki,Yang, Jae Seung 대한백신학회 2018 Clinical and Experimental Vaccine Research Vol.7 No.2
<P><B>Purpose</B></P><P>An oral cholera vaccine (OCV), Euvichol, with thimerosal (TM) as preservative, was prequalified by the World Health Organization (WHO) in 2015. In recent years, public health services and regulatory bodies recommended to eliminate TM in vaccines due to theoretical safety concerns. In this study, we examined whether TM-free Euvichol induces comparable immunogenicity to its TM-containing formulation in animal model.</P><P><B>Materials and Methods</B></P><P>To evaluate and compare the immunogenicity of the two variations of OCV, mice were immunized with TM-free or TM-containing Euvichol twice at 2-week interval by intranasal or oral route. One week after the last immunization, mice were challenged with <I>Vibrio cholerae</I> O1 and daily monitored to examine the protective immunity against cholera infection. In addition, serum samples were obtained from mice to measure vibriocidal activity and vaccine-specific IgG, IgM, and IgA antibodies using vibriocidal assay and enzyme-linked immunosorbent assay, respectively.</P><P><B>Results</B></P><P>No significant difference in immunogenicity, including vibriocidal activity and vaccine-specific IgG, IgM, and IgA in serum, was observed between mice groups administered with TM-free and -containing Euvichol, regardless of immunization route. However, intranasally immunized mice elicited higher levels of serum antibodies than those immunized via oral route. Moreover, intranasal immunization completely protected mice against <I>V. cholerae</I> challenge but not oral immunization. There was no significant difference in protection between two Euvichol variations.</P><P><B>Conclusion</B></P><P>These results suggested that TM-free Euvichol could provide comparable immunogenicity to the WHO prequalified Euvichol containing TM as it was later confirmed in a clinical study. The pulmonary mouse cholera model can be considered useful to examine <I>in vivo</I> the potency of OCVs.</P>