A reexamination of simple examples that we usually teach to our students in introductory courses is the starting point for a discussion about the principle of conservation of energy and Galilean invariance. (Contains 5 figures.)

Lakeland Community College is recognized for its energy conservation leadership in Ohio and nationally. The college's program will detail the practical, incremental approach taken in Lakeland's "Energy Journey." Setting the standard statewide, that journey recently resulted in a sustainable, guaranteed reduction of energy use by 40%.

While it is too early to measure changes in fall 2011 enrollments, overcrowding on campuses is likely to remain a problem, at least for the foreseeable future. For community colleges, many of which face steep budget cuts in the coming year, the challenge will be how to draw back spending without negatively affecting the student experience.…

Increased energy efficiency and reduced reliance on fossil fuels are both essential if people are to have any chance of avoiding escalating energy prices and the grim reality of catastrophic climate change. By increasing the diversity of energy sources people can also achieve increased security, reducing their dependence on imports. As…

Using two cardboard boxes, a light bulb socket, light bulbs of varying wattage, a thermometer, and some insulation, students can learn some interesting lessons about how heat loss occurs in homes. This article describes practical experiments that work well on units related to energy, sustainable energy, renewables, engineering, and construction.…

The modern food system involves high consumption of natural resources and other forms of environmental degradation. This paper is a presentation of internet resources such as scientific contributions, graphics, tables, images, animations and interactive atlases that can help to teach this subject. The discussion contains some subjects considered…

Nearly 50 years ago, Henry Bent published his groundbreaking article in this "Journal" introducing the "global" formulation of thermodynamics. In the following years, the global formulation was elaborated by Bent and by one of the present authors. The global formulation of the first law focuses on conservation of energy and the recognition that…

Kirchhoff's laws are usually considered as electrical current and voltage properties. Nevertheless, they are sometimes applied to nonelectrical systems. One way to increase their efficacy and range of applicability would be to show Kirchhoff's laws, and the properties deriving from them, as being independent of any physical system as far as…

When the term "green" is used to describe a product or way of life, it means "environmentally friendly." Followers of the green movement believe that by reducing their own usage of resources, they can reduce their negative impact on the environment and influence culture to the same ends. The green movement has spread from individuals to companies…

When construction slows and campus operating expenses are under the microscope, it is more important than ever to save energy dollars with the equipment and staff on hand. For the facilities manager who thinks out of the box, significant savings can be found on most school and college campuses. This article provides energy-conservation tips that…

Displacement ventilation (DV) units use the natural buoyancy of warm air to improve ventilation and comfort. Although relatively new to the United States, DV has been used in Scandinavian countries since the 1970s. Two types of DV can be used in a classroom: (1) Conventional displacement ventilation (CDV) units which are situated on an interior…

The influx of technology has brought significant improvements to school facilities. Many of those advancements can be found in classrooms, but when students head down the hall to use the washrooms, they are likely to find a host of technological innovations that have improved conditions in that part of the building. This article describes modern…

The Business and Society Research Cluster (BSRC) at the German University in Cairo, the El-Khazindar Business Research and Case Center at the American University in Cairo and Misr El-Kheir (MEK) Foundation, Egypt, hosted the region's first sustainability and corporate social responsibility (CSR) case studies conference, entitled "Toward a…

Switched-mode power supplies (SMPS) are becoming an essential part of many electronic systems as the industry drives toward miniaturization and energy efficiency. However, practical SMPS design courses are seldom offered. In this paper, a generalized MATLAB/SIMULINK modeling technique is first presented. A proposed practical SMPS design course at…

Prince George's County Public Schools in Maryland, just outside of Washington, DC, has 125,000 students, 200 schools, and an annual budget of about $1.6 billion. Last year that budget was cut by about $16 million. The year before it was cut by $80 million. Every year now, it seems, school districts are forced to leave no stone unturned when it…