Guide to Relationship-Rich Education in Teaching & Learning: Introduction to the 2022 Pedagogicon Proceedings

The Guide to Relationship-Rich Education is a compilation of teaching strategies that promote relationship-rich education strategies (Felten & Lambert, 2020) across higher education contexts. In this guide, teacher-scholars present relationship-rich strategies and corresponding analyses across teaching and learning environments

Agile Teaching & Learning: Approaches and Applications: Introduction to the 2021 Pedagogicon Proceedings

The authors review Agile teaching and learning in light of extant research and offer applications based on presentations shared during the 2021 Pedagogicon

Energy Efficient Process Heating: Managing Air Flow

Much energy is lost through excess air flow in and out of process heating equipment. Energy saving opportunities from managing air flow include minimizing combustion air, preheating combustion air, minimizing ventilation air, and reconfiguring openings to reduce leakage. This paper identifies these opportunities and presents methods to quantify potential energy savings from implementing these energy-savings measures. Case study examples are used to demonstrate the methods and the potential energy savings.The method for calculating savings from minimizing combustion air accounts for improvement in efficiency from increased combustion temperature and decreased combustion gas mass flow rate. The method for calculating savings from preheating inlet combustion air consists of fundamental heat exchanger and combustion efficiency equations. This method accounts for the reduction of combustion air flow as fuel input declines, which is often neglected in many commonly-used methods. The method for calculating savings from reducing forced ventilation in ovens accounts for flow rate of ventilation air and air temperature when entering and exhausting the oven. The method for calculating savings from reconfiguring oven openings accounts for flow rate of air entering and exiting the oven due to buoyancy forces

Energy Efficient Process Heating: Insulation and Thermal Mass

Open tanks and exterior surfaces of process heating equipment lose heat to the surroundings via convection, radiation, and/or evaporation. A practical way of reducing heat loss is by insulating or covering the surfaces. This paper presents methods to quantify heat loss and energy savings from insulating hot surfaces and open tanks. The methods include radiation and evaporation losses, which are ignored by simplified methods. In addition, thermal mass, such as refractory, conveyor and racking equipment, acts as a heat sink and increases heating energy use in process heating applications. This paper presents lumped capacitance and finite-difference methods for estimating heat loss to thermal mass, and savings from reducing this loss. The methods described above have been incorporated in free software, and are demonstrated using case study examples. The examples demonstrate the magnitude of the potential error from using simplified methods

Quantifying Savings From Improved Boiler Operation

On/off operation and excess combustion air reduce boiler energy efficiency. This paper presents methods to quantify energy savings from switching to modulation control mode and reducing excess air in natural gas fired boilers. The methods include calculation of combustion temperature, calculation of the relationship between internal convection coefficient and gas flow rate, and calculation of overall heat transfer assuming a parallel-flow heat exchanger model. The method for estimating savings from changing from on/off to modulation control accounts for purge and drift losses through the boiler and the improved heat transfer within the boiler due to the reduced combustion gas flow rate. The method for estimating savings from reducing excess combustion air accounts for the increased combustion temperature, reduced internal convection coefficient and increased residence time of combustion gasses in the boiler. Measured boiler data are used to demonstrate the accuracy of the methods

Peer Writing Tutors and the On-Going Conversation About Student Engagement

The presenters -- directors and a student-leader of two writing and communication centers -- will take the ongoing conversation of student engagement and writing centers in a new direction. Building on the conversation Kail, Gillespie, and Hughes initiated on assessing peer tutor alumni, presenters will examine how centers create the types of learning experiences that engage staff members within their centers, universities, and communities. Using student engagement research as a foundation, the two centers developed “engagement surveys” that measured how working in the writing center influenced their tutors’ experiences as students. Presenters analyze results and implications for the role writing centers should play in student engagement and how such can be assessed

Debris Disks in the Scorpius-Centaurus OB Association Resolved by ALMA

We present a CO(2-1) and 1240 um continuum survey of 23 debris disks with spectral types B9-G1, observed at an angular resolution of 0.5-1 arcsec with the Atacama Large Millimeter/Submillimeter Array (ALMA). The sample was selected for large infrared excess and age ~10 Myr, to characterize the prevalence of molecular gas emission in young debris disks. We identify three CO-rich debris disks, plus two additional tentative (3-sigma) CO detections. Twenty disks were detected in the continuum at the >3-sigma level. For the 12 disks in the sample that are spatially resolved by our observations, we perform an independent analysis of the interferometric continuum visibilities to constrain the basic dust disk geometry, as well as a simultaneous analysis of the visibilities and broad-band spectral energy distribution to constrain the characteristic grain size and disk mass. The gas-rich debris disks exhibit preferentially larger outer radii in their dust disks, and a higher prevalence of characteristic grain sizes smaller than the blowout size. The gas-rich disks do not exhibit preferentially larger dust masses, contrary to expectations for a scenario in which a higher cometary destruction rate would be expected to result in a larger mass of both CO and dust. The three debris disks in our sample with strong CO detections are all around A stars: the conditions in disks around intermediate-mass stars appear to be the most conducive to the survival or formation of CO.Comment: 16 pages, 6 figures, accepted for publication in Ap

The Impact of Gender Identity, Medical Transition, and Other Substances on Marijuana Use for Transgender Adults

Transgender individuals have been identified as having greater rates of substance use. Previous research often focused on the intersection of HIV risk and substance use on specific age ranges or on how minority stress and discrimination relate to substance use. Using data from the 2015 United States Transgender Survey, our study is one of the first to explore the relationship among gender identity, age, the role of medical transition, and the use of marijuana within the transgender community. A deeper understanding of the relationship of these variables will benefit the transgender community by allowing for more thorough and accurate assessment protocols for individuals seeking medical transition. Our study used descriptive statistics to examine the intersection of gender identity, age, and use of alcohol, cigarettes, and marijuana. ANOVAs were completed to determine significant impact of gender identity, age, cigarette and alcohol use, and medical transition on the use of marijuana. Significantly, we found that 37% of marijuana use can be predicted by gender identity, age, medical transition, and alcohol and cigarette use. Individuals who experienced any surgical transition reported significantly more marijuana use compared with individuals with no history of surgical transition. Our study highlights the need for more in-depth research about the complicated factors that relate to the impact of transition-related medical care and the intersection of gender identity and age