Sustainability Commons^™

Soil Carbon Dynamics And Greenhouse Gas Emissions In Conservation Tillage Systems At Multiple Scales, Yawen Huang

Theses and Dissertations--Plant and Soil Sciences

Conservation tillage practices like no-tillage and reduced tillage have been widely implemented worldwide, with expectations they would provide multiple benefits (e.g., yield enhancement and soil carbon sequestration) for food security and climate adaptation and mitigation. However, the adoption of conservation tillage faces both opportunities and challenges. A knowledge gap still exists regarding the effects of conservation tillage on the carbon cycle in agroecosystems. This dissertation reflects a comprehensive evaluation of conservation tillage at multiple scales using an integrated systems approach, a combination of data synthesis, the agriculture ecosystem model, and field observations and measurements. I first conducted a meta-analysis to …

Transformative Education In Agroecology: Student, Teacher, And Client Involvement In Co-Learning, Charles A. Francis, Anna Marie Nicolaysen, Geir Lieblein, Tor Arvid Breland

Department of Agronomy and Horticulture: Faculty Publications

Educational methods have evolved rapidly in agroecology, which is a complex and holistic field without a long history or the formal tradition of any single academic discipline. Definitions of agroecology have evolved from its initial conception as a marriage of agriculture with ecology, to an aggregation of different paths including science, practices, and movements, and recently as a broad appreciation of the ecology of food systems. In contrast with traditional courses that begin with a history of the discipline and review the contributions of early leaders, we have embraced phenomenology to firmly establish roots in students’ learning through their experiences …

Urban Food Sovereignty: Urgent Need For Agroecology And Systems Thinking In A Post-Covid-19 Future, Ali Loker, Charles A. Francis

Department of Agronomy and Horticulture: Faculty Publications

The current COVID-19 pandemic has brought attention to challenges associated with our dominant industrial food system in the U.S. The general public now has more appreciation for farm workers and meatpacking employees, as well as those in grocery stores and in food transportation who are suddenly recognized as essential frontline workers. It apparently takes a crisis for us to focus clearly on the fragility of this system and the lives of people on whom we depend. In this commentary we discuss the definition of food sovereignty, how it manifests in urban areas, and how the COVID-19 pandemic can trigger viable …

Macro - And Microstructure Evaluation And Field Applications Of Concrete With Recycled Glass Pozzolan, Marija Krstic

Dissertations and Theses

Concrete is the most used material in the world, second only to water. Conventional concrete is produced with Portland cement (PC). The production of cement is an energy intensive operation that has raised significant environmental concerns, since one ton of cement generates an equal ton of CO₂. In the USA about 90 million tons of cement are used annually, with 3 million tons used in New York. Most contemporary concrete applications for buildings and infrastructure use high-performance concrete (HPC) mixtures which are produced by replacing a percentage of cement with supplementary cementitious materials (SCMs), consisting mainly of fly-ash …

Adapting To Extreme Heat: Social, Atmospheric, And Infrastructure Impacts Of Air Conditioning In Megacities - The Case Of New York City, Harold Gamarro

Dissertations and Theses

Extreme heat events are becoming more frequent and intense in most large cities. Built-up surfaces also limit cooling mechanisms, leading to warmer conditions in cities, a phenomenon called the Urban Heat Island (UHI). This presents major challenges to reduce adverse health effects of hot weather, particularly in vulnerable populations like the elderly and low-income communities. Here we explore the overall impacts of increasing air conditioning (AC) system adoption in residences as an adaptive measure to reduce human health risks under heat waves, with New York City (NYC) as a case study. This study uses AC adoption data from the 2017 …

Social Connectedness And Financial Independence Strategies Supporting Nonprofit Sustainability, Christopher Edmund Maylor

Walden Dissertations and Doctoral Studies

Leaders of nonprofit organizations (NPOs) often lack strategies to ensure the sustainability of their organizations beyond initial funding, resulting in significant risk to program continuity. Grounded in social entrepreneurship theory, the purpose of this qualitative single-case study was to explore strategies used by 3 leaders of a small NPO in the southwest region of the United States. Data were collected from semistructured interviews and a review of organizational documents. Through thematic analysis, 6 social themes emerged: optimization of business strategies, income and donor growth, program cost management, funding diversification, program licensing, and public awareness of NPO programs. The contributions to …

Use Of Force Citizen Complaints, Use Of Force Violations, And Early Intervention, Drema Ann Hymon

Walden Dissertations and Doctoral Studies

Abstract

Mounting public protests, increasing expensive payouts, and shootings of unarmed victims by police is a call to reexamine options to problem solving, service recovery, and preventing police misconduct as it pertains to the use of force. The purpose of this quantitative study was to examine the correlation between early intervention system data

(a) use of force, citizens' complaints (race and gender), and use of force violations (race, gender, and years of service for officers). The disruptive theoretical framework provided an innovative lens to examine police misconduct of a large midwestern large law enforcement agency. This secondary data study did …

Relationship Between Transformational Leadership Style And Financial Sustainability, Tameika R. Campbell

Walden Dissertations and Doctoral Studies

Only 50% of the U.S. small businesses opened in 2011 were able to maintain financial sustainability. Small business owners struggle with identifying the type of leadership style needed to increase financial sustainability. Grounded in the transformational leadership theory, the purpose of this correlational study was to examine the relationship between idealized influence, inspirational motivation, intellectual stimulation, individualized consideration, and financial sustainability. The participants consisted of 76 small business owners located in Arkansas, California, Louisiana, Maryland, Texas, and Virginia. The business owners completed a survey containing the Multifactor Leadership Questionnaire and the Financial Capability Scale. The data were analyzed using multiple …

Water Sustainability Leadership Fostering Stakeholder Engagement, Rosa Elena Bustillos Wong

Walden Dissertations and Doctoral Studies

Water conservation management and water use behaviors of U.S. citizens are critical to secure water for future generations. An American citizen consumes approximately 88 gallons of water per day. On a local scale, a Florida citizen uses 134 gallons per day and wastes 71% of the total municipal drinking water provision in landscape activities. The problem addressed in this study was that administrators working on water conservation programs undergo difficulty fostering stakeholder engagement to advocate a water use behavioral change. The purpose of this qualitative exploratory multiple case study was to understand how citizen water use behaviors influence stakeholder water …

Interfaces In Lead-Free Tin Perovskite Photovoltaics: An Investigation Of Energetics, Ion Mobility, Surface Modification, And Performance, Alex Boehm

Theses and Dissertations--Chemistry

Halide perovskites have generated tremendous interest as low-cost semiconductors for optoelectronics, such as photovoltaics, lasers, and light emitting diodes due to their extraordinary optical and transport properties. Perovskite photovoltaics in particular have demonstrated a meteoric rise in power conversion efficiencies and drawn considerable interest as a next-generation solar energy technology. The rapid development has centered around lead-based derivatives, and concerns regarding the toxicity of lead has sparked interest in low toxicity and more environmentally friendly perovskite derivatives. In this regime tin (Sn) is regarded as a prominent alternative owing to the ideal bandgap and reduced toxicity exhibited by Sn-halide perovskites. …

The Limits Of Lead (Pb) Phytoextraction And Possibilities Of Phytostabilization In Contaminated Soil: A Critical Review, Sara Perl Egendorf, Peter M. Groffman, Gerry Moore, Zhongqi Cheng

Advanced Science Research Center

This review article focuses on lead (Pb), one of the most ubiquitous and harmful toxicants found in soil. Our objective is to address misconceptions regarding the ability of plants to uptake Pb through their roots and translocate it to above-ground tissues, and their ability to act as hyperaccumulators and thereby phytoextract Pb. In accordance with a number of cited definitions, we suggest that species capable of Pb phytoextraction can be rated with the following three criteria: (1) root uptake above a nominal threshold of 1,000 mg Pb/kg, (2) bioconcentration factor (BCF or shoot/soil concentration) >1, and (3) translocation factor (TF …

University-Community Partnership For Water Technology Deployment And Co-Innovation: A Decade Of Engagement, Paul M. Cabacungan, Gregory L. Tangonan, Nerissa G. Cabacungan

Ateneo Innovation Center

The Ateneo de Manila University (Philippines), through its Ateneo Innovation Center (AIC), integrated existing simple technologies into one system – the Water-Electricity-Lighting System (WELS) – to respond to the need for potable water, lighting and communication. WELS is a portable clean water system with provision for lighting and cellular phone charging. It can be connected to a rainwater harvesting facility. Ten years of WELS deployments revealed its flexibility for customization in order to address varied water needs, especially for disaster response. Review of documentations done on past installation experiences highlights the value of engagement between university-based technology providers and community-recipients. …

Gulf Coast Marine Laboratories Past, Present And Future, Donald F. Boesch

Gulf and Caribbean Research

I spent my nearly 50—year career in marine science working at marine laboratories, most of that as a chief executive officer. So, it is appropriate that my reflections are about marine laboratories, rather than my own science. After relating my career course, I turn my attention to the history and development of marine laboratories along the U.S. coast of the Gulf of Mexico (GOM). Surprisingly, the region’s first laboratory was actually constructed in 1903 at Cameron, LA, but operated less than a decade before closing. It was not until after World War II that the university—affiliated marine laboratories of today …

Understanding And Measuring Net Positive Business Strategies, Luke Ruffner Robinson

Graduate Student Theses, Dissertations, & Professional Papers

Despite their attempts to mitigate ecological impacts through sustainability initiatives, businesses are a major cause of the world's ecological problems. Some progressive businesses are attempting to move beyond “net zero” in terms of achieving neutral environmental impacts and instead are now pursuing a goal of net positive. Net positive refers to the idea that business activities could contribute value-added benefits to earth’s ecological systems, for example, by using technologies that sequester and store carbon. However, except for a handful of high-profile corporate case studies, little is known about how companies are developing their strategies to become net positive and …

Sustainability Strategies Of Small Business Owners In Northcentral Texas, Danielson Ledum Dukor

Walden Dissertations and Doctoral Studies

While small businesses contribute significantly to job creation in the United States, they fail financially at alarming rates. Fifty percent of small businesses survive 5 years or longer, and only one-third of small business startups survive more than 10 years. Owners of small businesses could benefit from strategies used to mitigate the small firms’ failure rate by obtaining suitable leadership values and skills, understanding the business’s nature, and engaging in financial planning. Grounded in Schumpeter’s entrepreneurship theory, the purpose of this qualitative multiple case study was to explore strategies small home health business owners used to sustain their businesses beyond …

Strategies For Small Business Sustainability Beyond 5 Years In New Restaurant Industry, Alexandria Norma Wilhoite

Walden Dissertations and Doctoral Studies

More than half of small businesses in the United States are unsustainable within the first five years of existence. Small business owners who do not implement successful and sustainable strategies are at a high risk of failure. Grounded in the resource-based view theory, the purpose of this qualitative multiple case study was to explore strategies that some small restaurant owners use to sustain business beyond five years. The participants included three small business owners in Connecticut who have been in business for five years. Data were collected from semistructured interviews, company websites, and company documents. Yin’s 5-step thematic analysis was …

Effectively Managing Energy Costs In The Resort Industry, Justin Whitesides

Walden Dissertations and Doctoral Studies

Hawaii's commercial consumers pay the highest electricity rate in the United States;these costs are expected to rise 3-3.5% in 2021. Management in the Hawaiian resort industry that lacks adequate knowledge of controlling these rising costs is at a competitive disadvantage. Utilizing the diffusion of innovation theory, the purpose of this qualitative case study was to explore strategies used in the resort industry to control energy costs. The participants comprised of 10 energy management professionals with successful experience managing energy consumption in the resort industry. Data were collected through telephone interviews, archival documentation, and field notes. Using Yin's 5-step process of …

Seismic Behavior Of Composite Bridge Columns, Mohanad M. Abdulazeez

Doctoral Dissertations

“This study investigates experimentally and numerically the seismic behavior of large-scale hollow-core fiber-reinforced polymer-concrete-steel (HC-FCS) innovative bridge columns as a sustainable approach to endure and rapidly recover from natural disasters such as earthquakes. The HC-FCS column consisted of a concrete shell sandwiched between an outer fiber-reinforced polymer (GFRP) tube and an inner steel tube to provided continuous confinement for the concrete shell along with the height of the column. The columns have a slender inner steel tube with diameter-to-thickness (D_s/t_s) ratios ranged between 85 to 254. Each steel tube was embedded into the footing, while the …

Emotional Response To Climate Change Learning: An Existential Inquiry, Jennifer Hutchinson

Antioch University Dissertations & Theses

This qualitative study aims to explore and explain the existential underpinnings of learning about climate change and potential emotional responses to climate change learning. Undergraduate students in environmental sciences and studies classes at the University of Washingrounded theory on in Seattle, WA participated in semi-structured interviews. Participants were asked about their experiences learning about climate change and how they responded emotionally to the learning. This dissertation examines the responses from those interviews and builds a theory out of the data analyzed. Constructivist Grounded theory as outlined by Kathy Charmaz (2014) was used to analyze the interviews. Codes were created and …

Making It Personal: Developing Sustainability Leaders In Business, Aoife Brophy Haney, Jenny Pope, Zoe Arden

Research outputs 2014 to 2021

Sustainability challenges present organizations in many industries with the need to change. Leaders are critical to the process of becoming more sustainable, and yet leading change for sustainability requires new competencies. Learning at an individual level is central to developing new competencies; however, there has been limited focus to date in the literature on corporate sustainability on how leaders can learn to respond to sustainability challenges. In this article, we focus on how managers learn to become sustainability leaders in their organizations by exploring the phenomenon of experiential learning programmes. We do this by interviewing participants and organizers of four …