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Working Conditions of Dental Hygienists Employed in Japanese Hospitals
Kouji Wada,Noriko Takei,Noriko Kanazawa,Tomoe Miyoshi,Kanako Noritake 대한예방치과학회 2019 International Journal of Clinical Preventive Denti Vol.15 No.1
Objective: Although the number of dental hygienists employed in hospitals has increased in recent years, few studies have examined their working conditions. The purpose of this study was to analyze the working conditions of dental hygienists employed in hospitals, and to investigate any differences according to hospital characteristics. Methods: This study was based on anonymous data obtained in the Survey of Dental Hygienists Working at Hospitals conducted by the Japan Dental Hygienists Association in December 2016. Among the 1,163 respondents, 1,085 answered questions regarding the number of beds and the dental-related clinical specialties in the hospital where they work, were included in this study. Based on the number of beds and dental-related specialties, hospitals were divided into four groups. The chi-square test was used to test the differences in proportions between the groups. p-values less than 0.05 were considered statistically significant. Results: Among the four groups, there were significant differences in respondent age, length of service, the reasons why respondents were initially hired in the hospitals, the number of dental-related specialties claimed by the hospitals, and the main focus of the hospitals (such as ambulatory service or inpatient service) (p<0.05). Conclusion: This study revealed significant differences in the working conditions of dental hygienists depending on the size and characteristics of the hospitals.
Design of Low Power All-Optical Networks with Dynamic Lightpath Establishment
Kouji Hirata,Kohei Ito,Yutaka Fukuchi,Masahiro Muraguchi 한국통신학회 2016 Journal of communications and networks Vol.18 No.4
In multifiber all-optical networks, optical amplifiers areused for amplifying multiple optical signals with different wavelengthsin fibers. An optical amplifier operates when any of lightpathspasses through it. Therefore, it should simultaneously amplifyas many lightpaths as possible for efficiently utilizing itspower. This paper proposes a dynamic lightpath establishmentscheme considering the use efficiency of the optical amplifiers andthe depletion of the wavelength resources in multifiber all-opticalnetworks. The proposed scheme provides a routing and wavelengthassignment strategy that reduces both the power consumption ofthe optical amplifiers and the blocking probability of the lightpathestablishment. Through simulation experiments, we demonstratethe effectiveness of the proposed scheme.
kouji Shinohara 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The recent steady-state advanced tokamak researches on JT-60U are reviewed. For the further extension of the research, TF ripple reduction by a ferritic insertion was proposed. The design of the ongoing ferritic insertion is reviewed from the viewpoint of energetic ion behavior, together with a review of the pioneer work in the ferritic insert experiments on JFT-2M.
Articles : Separation of Fatty Acids By Crystallization Using Two Liquid Phases
( Kouji Maeda ),( Yoshihisa Nomura ),( Keisuke Fukui ),( Shouji Hirota ) 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.3
First, the phase diagrams for the water+ethanol+fatty acids system were described, and the separation method was considered. Second, the separation of lauric acid+myristic acid mixture in the ethanol aqueous solution including ethanol by liquid-liquid extraction and crystallization has been examined. The extraction of fatty acids from the organic phase to the aqueous solution has been done. Fatty acids in the aqueous solution were crystallized using the aqueous SLE surface. The solvent-free mole fraction of lauric acid in the aqueous solution was a little higher than that in the organic phase. Fine crystals made in the aqueous solution had better purity for lauric acid than the solvent-free mole fraction of lauric acid in the aqueous solution. The effects of the mole fraction of ethanol in the aqueous solution, the mole fraction of lauric acid in the organic solution, extraction temperature and crystallization temperature on the purity of the crystals were reported.