Human values and natural systems

Coupled human and natural systems.

Humans have continuously interacted with natural systems, resulting in the formation and development of coupled human and natural systems (CHANS). Recent studies reveal the complexity of organizational, spatial, and temporal couplings of CHANS. These couplings have evolved from direct to more indirect interactions, from adjacent to more distant linkages, from local to global scales, and from si...

Coordinated Planning and Scheduling of Electricity and Natural Gas Systems

In this paper we propose a model for coordinated planning of power and natural gas systems, as a part of electricity supply chain. This model takes into account costs and constraints of both systems, and with hiring simplifications and linearization methods transforms initially nonlinear formulation to a mixed integer linear programming (MILP) problem. Natural gas would be assumed steady state,...

Complexity of coupled human and natural systems.

Integrated studies of coupled human and natural systems reveal new and complex patterns and processes not evident when studied by social or natural scientists separately. Synthesis of six case studies from around the world shows that couplings between human and natural systems vary across space, time, and organizational units. They also exhibit nonlinear dynamics with thresholds, reciprocal fee...

Adherence of Islamic values and human immunodeficiency virus prevention

The human immunodeficiency virus (HIV) is lentivirus (subgroup of retrovirus) which causes HIV infection and it acquired immunodeficiency syndrome (AIDS). HIV infection leads to low levels of CD4+T cells through number of mechanisms [1]. Our purpose is to review educative HIV prevention and control as Millennium Development Goal (MDG) and WHO's operational goal. In 2000, when ...

Modeling Causal Interaction Between Human Systems and Natural Systems