The Working Life Span of American Workers

The attitude of physicians toward retirement was studied using a questionnaire sent to physicians aged 65 and older. The information obtained was supplemented by organizing a study group of interested doctors. Of the 58 respondents whose average age was 71, 54 were still in practice and 65% had no plans for retirement. There was a strong urge to maintain the status quo. The group discussion centered around the loss of control over one's declining practice and the fear of diminishing competence with advancing age. The dedicated lifetime pursuit of a medical practice makes retirement extremely difficult for today's older physician. This study supports surveys on the working life span, longevity and mortality of North American physicians.

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The Effects of Chlorine Depletion of Antioxidants in Polyethylene

Polymers and Polymer Composites ◽

10.1177/096739110100900101 ◽

2001 ◽

Vol 9 (1) ◽

pp. 1-13 ◽

Cited By ~ 10

Author(s):

John P. Dear ◽

Nick S. Mason

Keyword(s):

Water Treatment ◽

Life Span ◽

World Wide ◽

Working Life ◽

Distribution Networks ◽

Environmental Stresses ◽

Dry Air ◽

Polyethylene Pipes ◽

The World

For many polyethylene products, their working life-span depends on retention by the material of its antioxidant. In dry air, when the working and environmental stresses remain within defined limits, the life-span of the material can be many decades. Immersed in water, for example, the diffusion and loss of antioxidant from the material's surface can increase. Also, some types of aggressive agents, if in the water, can enter the material's surface and migrate into the material to increase the depletion of the antioxidant population. Researched in this study, is the depletion of antioxidants in polyethylene when exposed to water containing different chlorine concentrations. This research relates to the world-wide use of polyethylene pipes in water treatment and distribution networks.

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The long life-span of a Li-metal anode enabled by a protective layer based on the pyrolyzed N-doped binder network

Journal of Materials Chemistry A ◽

10.1039/c7ta02144e ◽

2017 ◽

Vol 5 (19) ◽

pp. 9339-9349 ◽

Cited By ~ 32

Author(s):

Zhenggang Zhang ◽

Zhe Peng ◽

Jieyun Zheng ◽

Susu Wang ◽

Zixuan Liu ◽

...

Keyword(s):

Porous Structure ◽

Life Span ◽

Protective Layer ◽

Working Life ◽

Metal Anode ◽

Li Metal Anode ◽

Long Life

We utilize a protective porous structure based on the pyrolyzed PAN binder to stabilize the electrolyte/lithium interface to prolong its working life.

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Pemeliharaan Dan Penyimpanan Peralatan Laboratorium Kimia

Jurnal Pengelolaan Laboratorium Pendidikan ◽

10.14710/jplp.1.1.26-32 ◽

2009 ◽

Vol 1 (1) ◽

pp. 26

Author(s):

Jufriyah Jufriyah ◽

Isna Mar'ah ◽

Kelik Isharyudono

Keyword(s):

Life Span ◽

Working Life ◽

Classification Method ◽

Direct Impact ◽

Laboratory Equipment ◽

Chemical Laboratory ◽

Frequency Of Use ◽

Group Frequency ◽

And Storage

Improper maintenance and storage of laboratory equipment, will shorten the life span. Damage to the tool will have a direct impact on the costs that must be incurred to replace damaged equipment components or even procurement of new equipment. The purpose of this paper is to provide an understanding of how to maintain and store chemical laboratory equipment. And can identify damage to chemical laboratory equipment. Broadly speaking, the tool maintenance method is divided into two parts: planned maintenance and unplanned maintenance. For storage of tools using the classification method based on the tool group, frequency of use and the nature of the tool. Maintenance and storage of chemical laboratory equipment is an activity process in order to anticipate damage as early as possible so that it can increase the efficiency of the working life of the equipment used. So that the chemical laboratory equipment can function optimally and always in a state of ready use, it is necessary to have knowledge about how to maintain and store laboratory equipment and how to identify equipment damage as early as possible. Maintenance and storage of chemical laboratory equipment properly can prevent damage to chemical laboratory equipment that will extend the life of the equipment, and ensure the comfort and safety of the user.

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