IWOCE RC PBC 2019

 
Welcome to International Workshop on Open Component Ecosystems 
Over the last years, the composition of software parts is increasingly considered a crucial operation to build and maintain large software systems.
The continuous and independent evolution of  readily available components suggested that open platforms can better accommodate and manage them as normally happens in systems like open  source software distributions, Eclipse, and J2EE, just to mention a few.
The critical mass represented by such software components requires organizations, such as companies, research groups, and open  source communities, to collaborate on custom software development,  implementation and shared services.
Such infrastructures can be  regarded as ecosystems, i.e., collections of software projects that possibly belong to organizations, developed in parallel by the organizations, and able to integrate each other at assembly time, during the configuration, and/or dynamically after the deployment. 

The capability of modeling, analyzing, and predicting the component behavior during these stages is intrinsically difficult and requires techniques, algorithms, and methods which are both expressive and computationally convenient in order to be engineered and conveyed in practical projects.
Moreover, when analyzing software ecosystems, exploration and visualization cannot be neglected because of the large amounts of information that are available about the ecosystem. 

Alternative energy

Alternative energy is any energy source that is an alternative to fossil fuel. The alternatives are intended to address concerns about fossil fuels, such as its high carbon dioxide emissions, an important factor in global warming. Marine energy, hydroelectric, wind, Geothermal and solar power are all alternative sources of energy.

The nature of what constitutes an alternative energy source has changed considerably over time, as have controversies regarding energy use. Because of the variety of energy choices and differing goals of their advocates, defining some energy types as "alternative" is considered very controversial.
The generation of alternative energy on the scale needed to replace fossil energy, in an effort to reverse global climate change, is likely to have significant negative environmental impacts. For example, biomass energy generation would have to increase 7-fold to supply current primary energy demand, and up to 40-fold by 2100 given economic and energy growth projections. Humans already appropriate 30 to 40% of all photosynthetically fixed carbon worldwide, indicating that expansion of additional biomass harvesting is likely to stress ecosystems, in some cases precipitating collapse and extinction of animal species that have been deprived of vital food sources. The total amount of energy capture by vegetation in the United States each year is around 58 quads (61.5 EJ), about half of which is already harvested as agricultural crops and forest products. The remaining biomass is needed to maintain ecosystem functions and diversity. Since annual energy use in the United States is ca. 100 quads, biomass energy could supply only a very small fraction. To supply the current worldwide energy demand solely with biomass would require more than 10% of the Earth's land surface, which is comparable to the area use for all of world agriculture (i.e., ca. 1500 million hectares), indicating that further expansion of biomass energy generation will be difficult without precipitating an ethical conflict, given current world hunger statistics, over growing plants for biofuel versus food.
Given environmental concerns (e.g., fish migration, destruction of sensitive aquatic ecosystems, etc.) about building new dams to capture hydroelectric energy, further expansion of conventional hydropower in the United States is unlikely. Windpower, if deployed on the large scale necessary to substitute fossil energy, is likely to face public resistance. If 100% of U.S. energy demand were to be supplied by wind power, about 80 million hectares (i.e., more than 40% of all available farmland in the United States) would have to be covered with wind turbines (50m hub height and 250 to 500 m apart). It is therefore not surprising that the major environmental impact of wind power is related to land use and less to wildlife (birds, bats, etc.) mortality. Unless only a relatively small fraction of electricity is generated by wind turbines in remote locations, it is unlikely that the public will tolerate large windfarms given concerns about blade noise and aesthetics.
Biofuels are different from fossil fuels in regard to net greenhouse gases but are similar to fossil fuels in that biofuels contribute to air pollution. Burning produces airborne carbon particulates, carbon monoxide and nitrous oxides.
Marine pollution

Marine pollution occurs when harmful effects result from the entry into the ocean of chemicals, particles, industrial, agricultural, and residential waste, noise, or the spread of invasive organisms. Eighty percent of marine pollution comes from land. Air pollution is also a contributing factor by carrying off pesticides or dirt into the ocean. Land and air pollution have proven to be harmful to marine life and its habitats.
The pollution often comes from nonpoint sources such as agricultural runoff, wind-blown debris, and dust. Nutrient pollution, a form of water pollution, refers to contamination by excessive inputs of nutrients. It is a primary cause of eutrophication of surface waters, in which excess nutrients, usually nitrates or phosphates, stimulate algae growth. Many potentially toxic chemicals adhere to tiny particles which are then taken up by plankton and benthic animals, most of which are either deposit feeders or filter feeders. In this way, the toxins are concentrated upward within ocean food chains. Many particles combine chemically in a manner highly depletive of oxygen, causing estuaries to become anoxic.

 

 
 
 

Member of IWOCE RC PBC 2019:



Professor

Roberto Di Cosmo


Definitions of different ecosystems


Research Proposal


Software Component Definition


History alternative energy


Enabling  technologies


Renewable energy vs non-renewable energy


Relatively new concepts for alternative energy


Research alternative energy


Disadvantages alternative energy


RC PBC
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