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CO 2 -based demand-controlled ventilation (DCV) is a ventilation method that resets outdoor air supply rates using CO 2 as an operating parameter (ASHRAE, 2007a). Even though CO 2 itself is not harmful, high levels of CO 2 concentration in indoor environments displace oxygen in the air and can cause a deficiency of oxygen for breathing. The most important aspect of CO 2 in DCV is that it is a good indicator of occupancy in indoor spaces. Therefore, CO 2 is an effective parameter for controlling ventilation based on occupancy level. CO 2 -based DCV has been increasingly used in recent years to optimize the energy consumption in ventilation systems as technological advances make its implementation more feasible and interest in environmentally responsible building design grows. This study aims to provide information about CO 2 -based DCV and suggest implications for interior design practitioners and educators. To achieve this purpose, this study reviewed previous studies and examined the current practices in CO 2 -based DCV in order to suggest guidelines for CO 2 -based DCV implementation for interior designers. The guidelines focused on proper CO 2 sensor location design, taking into consideration the activities and other equipment in the room. In addition, a study of CO 2 -based DCV in the lecture halls of a university campus was conducted. Physical measurements were done in the lecture halls, and trends data were collected from the university's facility management department to compare the measurements. A perceived indoor environmental quality survey was also done to explore the occupants' responses about CO 2 -based DCV.This study aims to provide information on CO 2 -based demand-controlled ventilation (DCV), an emerging technology for environmentally responsible interior design, in order to help interior designers understand the technology and its impact on building users.

Abstract-This study explored the use of interactive map for an academic library building. An interactive map was developed for six floors of the building. Participants used the map on a mobile device to conduct four different wayfinding tasks. A mobile eyetracking system was used to record gaze information that participants viewed. The gaze data were analyzed quantitatively and qualitatively using Begaze software. The results revealed that there were some trends. Individuals who were familiar with information technology devices were more successful in wayfinding making less error and hesitation. Individuals who had better sense of direction were more successful as well. However, familiarity with the building did not seem to be making a difference. Some design implications for interactive map design were suggested. The areas that are not open to public should have more explicit cues that the areas are not accessible such as crossing out the area.

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This study examined full-time recreational vehicle dwellers in the USA and revealed that mobile and stationary recreational vehicle dwellers were mainly the ‘young-old’ and those entering retirement ages, at an average of 60 years of age. Many recreational vehicle dwellers on limited incomes were found to occupy their recreational vehicles on a permanent basis. Because food security definitions require adequate space for food security, it was assumed that food strategies and food security in limited spaces such as the recreational vehicle might differ among mobile and stationary recreational vehicle dwellers based on their income levels and ability to comply with expected social and cultural standards for housing and recreational vehicle populations. By comparing mobile and stationary recreational vehicle dwellers and further grouping recreational vehicle dwellers as those over and under 65 years of age, this study examined how personal assessments varied in terms of kitchen space, food security and related household food strategies. This study focused on kitchen space assessments and their relation to food security. The stationary full-time occupancy of the recreational vehicles as primary housing is not regulated by law or housing codes. Thus, this study's results will be valuable to understanding aged individuals' housing perceptions and needs in order to provide foundational information for policy and regulation development for alternative housing, such as recreational vehicles and smaller dwellings.