Christopher Ellis

Dr. Christopher Ellis

Landscape Architecture Program, The University of Maryland, College Park, MD 20742, USA

Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 August 2021 in Sustainability
Verified
Journal Article
Open access
PDF file
BKByoung-Suk Kweon
Byoung-Suk Kweon
JNJody Rosenblatt naderi
Jody Rosenblatt naderi
Christopher EllisChristopher Ellis
Christopher Ellis
WSWoo-Hwa Shin
Woo-Hwa Shin
BDBlair Danies
Blair Danies
We investigated the effects of pedestrian environments on parents’ walking behavior, their perception of pedestrian safety, and their willingness to let their children walk to school. This study was a simulated walking environment experiment that created six different pedestrian conditions using sidewalks, landscape buffers, and street trees. We used within subjects design where participants were exposed to all six simulated conditions. Participants were 26 parents with elementary school children. Sidewalks, buffer strips, and street trees affected parents’ decisions to: walk themselves; let their children walk to school; evaluate their perception whether the simulated environment was safe for walking. We found that the design of pedestrian environments does affect people’s perceptions of pedestrian safety and their willingness to walk. The presence of a sidewalk, buffer strip, and street trees affected parents’ decision to walk, their willingness to let their children walk to school and perceived the pedestrian environment as safer for walking. The effects of trees on parents’ walking and perception of pedestrian safety are greater when there is a wide buffer rather than a narrow buffer. It was found that parents are more cautious about their children’s walking environments and safety than their own.

30 August 2023 in Sustainability
Verified
Journal Article
Open access
PDF file
ASAudrey Seiz
Audrey Seiz
BKByoung-Suk Kweon
Byoung-Suk Kweon
Christopher EllisChristopher Ellis
Christopher Ellis
HOHyuk Oh
Hyuk Oh
KPKyle Pietro
Kyle Pietro
Researchers have long explored how humans respond psychologically and physiologically to distinct landscapes and natural features. Walking in nature and viewing photographs of natural landscapes have been shown to reduce stress measured through the physiological responses of blood pressure, salivary cortisol concentration, and pulse rate. Exposure to natural landscapes has also been shown to improve feelings of relaxation and positive emotion. Little research, however, has focused on the potential impact of visualization through virtual reality (VR). This study explores how brain frequencies and psychological measures test the restorativeness of a virtual place. Utilizing VR, twenty-one participants observed a virtual, vegetated, vacant site as it exists currently and then again as a reimagined greenspace. The psychological responses were analyzed using the Perceived Restorativeness Scale (PRS), and the psychophysiological responses were analyzed using electroencephalography (EEG) with a specific focus on alpha and beta brain frequencies in the frontal and parietal lobes. Findings indicated that the perceived restorativeness of the designed site increased for two of the three determined factors. Alpha brain frequencies were not significantly different when viewing the vacant versus the designed site; however, beta brain frequencies demonstrated a marginally significant effect of sex with male beta power spectral density decreasing when viewing the designed site and female beta brain frequencies increasing. This research suggests that redesigning a vegetated urban vacant site can positively impact perceived restorativeness and unveils a potential gender effect present in beta brain frequencies.

JLJunga Lee
Junga Lee
BKByoung-Suk Kweon
Byoung-Suk Kweon
Christopher EllisChristopher Ellis
Christopher Ellis
Sang-Woo LeeSang-Woo Lee
Sang-Woo Lee
Ecosystem services depend on the interrelation between people and the environment, and people are increasingly recognizing the social value of ecosystem services. Based on humans needs related to the values of ecosystem services, riparian greenways, properly planned and managed for resiliency, could provide great opportunities for social ecological change and transformation toward sustainability. We focus on the ecosystem service values of such greenways based on resilience in urban communities. The purpose of this study is to assess the social value of ecosystem services for resilient riparian greenway planning and management based on a survey of residents living near the Yangjaecheon riparian greenway in Gwacheon, South Korea. First, cluster analysis was performed with data from 485 completed surveys to identify different groups of respondents. Importance-performance analysis (IPA) was then applied to develop planning and management guidance for the riparian greenway based on group characteristics. Two distinct groups were identified: the Strong Social Value of Ecosystem Services group and the Neutral Social Value of Ecosystem Services group. Different distributions were found between the two groups based on gender and residency period, and significant differences were also found for age and familiarity with the riparian greenway. The results show what each group perceived to be important and how well the riparian greenway met their expectations regarding ecosystem services. These results indicate the perceived value of ecosystem services on the basis of the group characteristics, helping establish the direction for resilient riparian greenway planning and management approaches.

6 February 2023 in Sustainability
Verified
Journal Article
Open access
PDF file
BKByoung-Suk Kweon
Byoung-Suk Kweon
WSWoo-Hwa Shin
Woo-Hwa Shin
Christopher EllisChristopher Ellis
Christopher Ellis
Today, few children walk or bike to school. According to the National Household Travel Survey, only 11% of children walk or bike to school. In 1969, almost 50% of children walked or biked to school in the US. Although our understanding is limited, previous research has shown that physical environments can influence non-automobile mode choices for travel to school. For example, landscape buffers and trees affect parents’ perceptions of their children’s safety and increase their willingness to let their children walk to school. We investigated how a number of physical attributes in the pedestrian environment influence children’s commutes to school. A total of 186 parents from four school walk zones in College Station, TX, participated in this study. We found that children walked more in neighborhoods with mature trees. Moreover, the mean walking and biking distances differed from each other, and both were influenced by the location of the school within the walk zones. Concerns about traffic safety and convenience were negatively related to walking and biking. The findings here suggest ways to shape better school walk zone guidelines that include neighborhood design, planning, and engagement in support of active and healthy children.

20 March 2015 in Sustainability
Verified
Journal Article
Open access
PDF file
JLJunga Lee
Junga Lee
Christopher EllisChristopher Ellis
Christopher Ellis
YCYun Eui Choi
Yun Eui Choi
YSYou Soojin
You Soojin
JCJinhyung Chon
Jinhyung Chon
This paper presents an integrated approach to mitigation wetland site selection using functional landscape connectivity and landscape structure. This approach enables landscape designers to evaluate the relative priorities of mitigation wetland areas based on functional landscape connectivity and wildlife mobility, as well as landscape structure, composition, and configuration. The least-cost path method is used to evaluate candidate sites for mitigation wetlands with regard to wildlife movement. A set of assessments for landscape indices using FRAGSTATS was applied to identify suitable mitigation wetland areas on the basis of landscape connectivity, composition, and configuration. The study was conducted in Gwacheon, Korea, where there are plans for regional development that will change the landscape. In the first step, a group of 14 candidate sites is identified via analysis of functional landscape connectivity using the least-cost path method. In the second step, candidate mitigation wetland areas are ranked according to landscape connectivity and composition. The five mitigation wetland areas that were found to be suitable were analyzed based on landscape configuration at the class level. This study demonstrates that functional landscape connectivity and landscape structure are important aspects to consider when identifying suitable sites for mitigation wetland planning and restoration.