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127 results on '"Cheng Y.J."'

3. Strengthening and toughening strategies of weld metal for in-situ nanoparticle reinforced tin bronze alloy

Author

Chen X.H., Ma Y.F., Wang Z.D., Cheng Y.J., Yang M., Jiang W.W., Cao Y.D., Chen X.H., Ma Y.F., Wang Z.D., Cheng Y.J., Yang M., Jiang W.W., and Cao Y.D.

Abstract

As-cast in-situ nanoparticle reinforced CuSn10Zn2Fe1.5Co0.5 (wt-%) alloy was selected as base metal (BM) and filler for welding. Butt joints were obtained by tungsten inert gas (TIG) welding. Microstructure of weld metal was characterised. Nanoparticles with an average diameter of about 5 nm are uniformly dispersed in the primary copper matrix in size of micro or nano scales for weld metal. A large number of nano grains with size of about 20 nm can be found in the weld metal as well. Mechanical properties of weld metal were comparable to those of heat-treated BM. Strengthening and toughening strategies for the weld metal were discussed through fabricating in-situ nanoparticles and nano grains in the weld metal., As-cast in-situ nanoparticle reinforced CuSn10Zn2Fe1.5Co0.5 (wt-%) alloy was selected as base metal (BM) and filler for welding. Butt joints were obtained by tungsten inert gas (TIG) welding. Microstructure of weld metal was characterised. Nanoparticles with an average diameter of about 5 nm are uniformly dispersed in the primary copper matrix in size of micro or nano scales for weld metal. A large number of nano grains with size of about 20 nm can be found in the weld metal as well. Mechanical properties of weld metal were comparable to those of heat-treated BM. Strengthening and toughening strategies for the weld metal were discussed through fabricating in-situ nanoparticles and nano grains in the weld metal.

Published
2021

9. Effects of physical activity on exercise tests and respiratory function

Author

Cheng, Y.J., Macera, C.A., Addy, C.L., Sy, F.S., Wieland, D., and Blair, S.N.

Subjects
Exercise -- Health aspects, Lung diseases -- Care and treatment, Health, Sports and fitness, Care and treatment, Health aspects
Abstract

Br J Sports Med 2003;37:521-528 Background: Exercise is an important component of pulmonary rehabilitation for patients with chronic lung disease. Objective: To explore the role of physical activity in maintaining [...]

Published
2003

15. Prevalence of doctor-diagnosed arthritis and arthritis-attributable activity limitation-United States, 2007 and 2009

Author

Cheng, Y.J., Hootman, J.M., Murphy, L.B., and Helmick, C.G.

Subjects
United States. Centers for Medicare and Medicaid Services, Arthritis -- Diagnosis, Arthritis -- Care and treatment
Abstract

The National Health Interview Survey (NHIS) data from 2007-2009 has shown that the prevalence of doctor-diagnosed arthritis and arthritis-attributable activity limitation (AAAL) has increased in the U.S. This major health problem can be addressed at least in part by implementing proven obesity prevention strategies and increasing availability of effective physical activity programs and self-management education courses in local communities.

Published
2010

16. Prevalence of doctor-diagnosed arthritis and arthritis-attributable effects among Hispanic adults, by Hispanic subgroup--United States, 2002, 2003, 2006, and 2009

Author

Murphy, L.B., Hootman, J.M., Langmaid, G.A., Brady, T.J., Helmick, C.G., Cheng, Y.J., Schieb, L., and Bolen, J.

Subjects
Medical care, Cost of, Prevalence studies (Epidemiology), Arthritis, Adults, African Americans, Health
Abstract

Arthritis affects approximately 50 million adults in the United States, making it one of the most prevalent health conditions among U.S. adults and the most common cause of disability (1). [...]

Published
2011

17. Prevalence of doctor-diagnosed arthritis and arthritis-attributable activity limitation - United States, 2007-2009

Author

Cheng, Y.J., Hootman, J.M., Murphy, L.B., Langmaid, G.A., and Helmick, C.G.

Subjects
Prevalence studies (Epidemiology) -- Analysis -- Surveys -- Reports, Arthritis -- Diagnosis -- Surveys -- Reports, Public health -- Analysis -- Surveys -- Reports, Health
Abstract

Arthritis is a large and growing public health problem in the United States (1), resulting in costs of $128 billion annually, and continues to be the most common cause of [...]

Published
2010

20. Slow Food: Sustained Impact of Harder Foods on the Reduction in Energy Intake over the Course of the Day

Author

Bolhuis, D.P., Forde, C.G., Cheng, Y.J., Xu, H.H., Martin, N., de Graaf, C., Bolhuis, D.P., Forde, C.G., Cheng, Y.J., Xu, H.H., Martin, N., and de Graaf, C.

Abstract

Background: Previous research has shown that oral processing characteristics like bite size and oral residence duration are related to the satiating efficiency of foods. Oral processing characteristics are influenced by food texture. Very little research has been done on the effect of food texture within solid foods on energy intake. Objectives: The first objective was to investigate the effect of hardness of food on energy intake at lunch, and to link this effect to differences in food oral processing characteristics. The second objective was to investigate whether the reduction in energy intake at lunch will be compensated for in the subsequent dinner. Design: Fifty subjects (11 male, BMI: 21 +/- 2 kg/m(2), age: 24 +/- 2 y) participated in a cross-over study in which they consumed ad libitum from a lunch with soft foods or hard foods on two separate days. Oral processing characteristics at lunch were assessed by coding video records. Later on the same days, subjects consumed dinner ad libitum. Results: Hard foods led to a similar to 13% lower energy intake at lunch compared to soft foods (P <0.001). Hard foods were consumed with smaller bites, longer oral duration per gram food, and more chewing per gram food compared to the soft foods (P <0.05). Energy intake at dinner did not differ after both lunches (P=0.16). Conclusions: Hard foods led to reduced energy intake compared to soft foods, and this reduction in energy intake was sustained over the next meal. We argue that the differences in oral processing characteristics produced by the hardness of the foods explain the effect on intake. The sustained reduction in energy intake suggests that changes in food texture can be a helpful tool in reducing the overall daily energy intake.

Published
2014

22. Correctable visual impairment among persons with diabetes--United States, 1999-2004

Author

Zhang, X., Gregg, E.W., Cheng, Y.J., Thompson, T., Geiss, L.S., Duenas, M.R., and Saaddine, J.B.

Subjects
Vision disorders -- Surveys, Visually disabled persons -- Surveys
Abstract

Persons with diabetes are more likely to be visually impaired than persons without the disease (1). In 2005, CDC estimated that 14.6 million persons in the United States had diagnosed [...]

Published
2006

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