نتایج جستجو برای: systems change

تعداد نتایج: 1714047  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

Journal: :journal of paramedical sciences 0
seyed mohammad mahdavi department of biology, science and research branch, islamic azad university, tehran hedayat sahraei neuroscience research center, baqiyatallah university of medical sciences, tehran hassan tavakoli neuroscience research center, baqiyatallah university of medical sciences, tehran paricher yaghmaei department of biology, science and research branch, islamic azad university, tehran

various stresses during life can affect metabolism and brain activities, immune and endocrine systems directly and indirectly, and ultimately, causes animal behavior change. the cellular and molecular level change in neurotransmitter and hormone concentrations led to the functional changes of operating systems in the intracellular organelles.  these events cause of course oxidative stress. all ...

2003
David R. Mandel

Simulations of world history, like the real thing, are complex systems whose outcomes most often (if not always) constitute highly contingent events. Rarely (if ever) will researchers be able to find unqualified main effects that explain important outcome measures that affect the security and prosperity of the world community. The problem of contingency for testing hypotheses about the causes o...

2016
P. E. Campana A. Olsson J. Zhang J. Liu F. Kraxner H. Li J. Yan

Grassland plays a key role for the food security of China because of the large number of livestock raised in those areas. Thus, grassland degradation due to climate change and overgrazing is considered as one of the most severe environmental and economic threat for the future sustainable development of China. Photovoltaic water pumping systems for irrigation can play a fundamental role for the ...

Journal: :Science, Technology, & Human Values 2022

The ongoing energy transition toward more sustainable systems implies a change in the values for which such are designed. however is not just about sustainability but also like security and affordability, we witness emergence of new justice democracy. How can understand value changes how or should they affect design future systems? This introduction to special section on introduces main themes ...

Journal: :American journal of preventive medicine 2008
George Luber Michael McGeehin

The association between climate change and the frequency and intensity of extreme heat events is now well established. General circulation models of climate change predict that heatwaves will become more frequent and intense, especially in the higher latitudes, affecting large metropolitan areas that are not well adapted to them. Exposure to extreme heat is already a significant public health p...

Journal: :Annual Review of Environment and Resources 2012

Journal: :Communications of the ACM 1981

Journal: :Social Marketing Quarterly 2018

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