A Profile of T. Ras Makonnen

Oda, Hideo

doi:10.11619/africa1964.1977.84

Cited by 2 publications

(2 citation statements)

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“…Aging research has also focused on positive aspects of old age (Kaufman, 1986; Takahashi and Takahagi, 1996). Since the 2000s, the need to focus on positive aspects has called for the examination of successful aging (Katagiri, 2012; Oda, 2004), active aging (Kaneko, 2014; Maeda, 2006), and productive aging (Saito, 2006). These studies have shown that old age can be an active and productive period of life, with most suggesting that an active life will likely result in a successful retirement period.…”

Section: Longevity In a Super-aged Societymentioning

confidence: 99%

Understanding diversity in later life and a new culture of aging: Sociology of aging in Japan

Watanabe

2021

International Sociology

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This essay introduces sociological studies on aging and related topics in Japan since 2000. It argues the three following points. First, the results of sociological studies on aging, and those from related social science disciplines, have moved away from a uniform understanding of aging to reveal greater diversity in the process. Second, it has become apparent that older people face various social problems, such as social isolation, social disparities, and family care problems. Studies have argued that it is essential to support mutual aid in the community. Finally, the reflexivity of high modernity attempts to push the problem of aging towards autonomy, but a new culture of aging assumes that dependence has the potential to overcome this reflexivity.

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Section: Longevity In a Super-aged Societymentioning

confidence: 99%

Understanding diversity in later life and a new culture of aging: Sociology of aging in Japan

Watanabe

2021

International Sociology

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“…The latest generation of graphite‐containing work roll shell materials, the so‐called “graphitic HSS” was intensively developed in the past 10 years. [ 2–4 ] These materials consist of significantly higher amounts of carbide forming elements such as V, Mo, W, Nb, and Ti in comparison to carbide‐enhanced indefinite‐chill materials with the aim to close the gap between high‐speed steel and indefinite‐chill work roll shell materials. In other words, this material type was developed to unify the high wear resistance of high‐speed steel materials and the low sensitivity against crack formation and propagation as well as the good surface quality of indefinite‐chill grades.…”

Section: Introductionmentioning

confidence: 99%

Influence of Carbide Types and Amounts on the Wear of Graphite‐Containing Alloys for Work Rolls

Paar¹,

Aigner²,

Reiter³

et al. 2022

steel research int.

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In the surface‐critical stands in hot rolling mills, the so‐called indefinite‐chill alloys are used as shell materials for the work rolls. The microstructure of these materials consists of cementite and graphite, as well as different other carbides, which are embedded in a martensitic/bainitic matrix. In the past 10 years, indefinite‐chill materials are intensively developed to meet the higher requirements in today's rolling mills. To measure the increase of the wear resistance, a wear test rig is designed and developed, which allows testing work roll materials under conditions that are very close to those in a rolling mill but still on a laboratory scale. This study shows the investigation results of four different indefinite‐chill and graphitic HSS alloys with different carbide amounts and types. The strong influence of MC and M2C/M6C‐carbides can be clearly seen but besides the carbides, also other microstructural phases have an influence on the wear of the alloys. It can be confirmed that with higher fractions of hard carbides the wear on the tested materials decreases. The results also clearly show that there has to be a correct balance between the different carbide types as well as the balance between the carbide, graphite, and matrix fractions.

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A Profile of T. Ras Makonnen

Cited by 2 publications

References 0 publications

Understanding diversity in later life and a new culture of aging: Sociology of aging in Japan

Understanding diversity in later life and a new culture of aging: Sociology of aging in Japan

Influence of Carbide Types and Amounts on the Wear of Graphite‐Containing Alloys for Work Rolls

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