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Warming Up Cold Cases with Dr. Krystal Hans
Get PDFDr. Krystal Hans is an assistant professor of forensic entomology in the Department of Entomology. Dr. Hans teaches courses on forensic science and forensic entomology, including the “Forensic Investigation” (ENTM 22810) course, where a major component of the course is a cold case project. The cold case project focuses on accessing information about an unresolved case and trains students to engage with empathy as advocates for victims while developing skills in research, digital and information literacy, submission of a Freedom of Information Act (FOIA) request, designing infographics, and public speaking. Students produce digital case files and infographics to display the information about the case they research, providing a summary presentation at the end of the semester. During the fall 2022 semester, the students focused on unresolved cases in Indiana and attended the Cold Case Symposium that was cohosted by Dr. Hans to learn from families and victim advocates about cases that need support and from organizations dedicated to helping families impacted by the tragic loss of a loved one. Dr. Hans has partnered with Project: Cold Case, a nonprofit organization that was established to serve families who have lost loved ones to homicide after seeing a need for more support. The organization works closely with surviving family members and law enforcement to educate and assist while also memorializing their loved one. Project: Cold Case presented lectures to the students in the fall of 2022, offered guidance for cold case research, and will have a more active role in future versions of the cold case project. The infographics and materials designed by Purdue students will be on display at the 2023 Cold Case Symposium to raise awareness of the unresolved cases in Indiana, generate public interest, and offer support for local families
Ethofumesate-resistant annual bluegrass (Poa annua) in grass seed production systems
Get PDFThe prolific seed production and polyploidy of annual bluegrass allow for the rapid development of herbicide resistance. Ethofumesate-resistant annual bluegrass plants were identified in the 1990s in grass seed production in Oregon, but their prevalence and distribution are not well documented. Therefore a dose–response experiment was initiated to determine the potential level of ethofumesate resistance in seed production systems. Seeds from 55 annual bluegrass populations were obtained from three sources: seed production fields (31 populations), the seed cleaning process (6 populations), and seed testing lots prior to retail distribution (18 populations). Additionally, two populations, one with known ethofumesate resistance and one with known susceptibility, were identified in preliminary testing and used as controls in this experiment. Seed from each collected population was increased. Individual seedlings were then transplanted into separate cone-tainers, grown to a size of 2 to 3 tillers in the greenhouse, and then sprayed using a compressed air track spray chamber with 10 doses of ethofumesate at 0, 0.56, 1.1, 2.8, 5.6, 8.4, 11.2, 16.8, 22.4, and 44.8 kg ai ha−1, with 0.84 to 2.2 kg ha−1 as the label application rate for perennial ryegrass. The resistant to susceptible ratio of populations across all sources ranged from 0.5 to 5.5. The most resistant populations found in production fields, seed cleaning, and seed testing lots had the effective dose necessary to kill 50% of the population (ED50) of 12.1, 9.4, and 13.1 kg ha−1, respectively. Furthermore, 68% of the populations found in production fields had ED50 higher than 6 kg ha−1, indicating common annual bluegrass resistance in grass seed production. As such, growers should implement integrated weed management strategies, as herbicides alone will likely be ineffective at controlling annual bluegrass
Colored Sweet Bell and Tapered Pepper Cultivar Evaluation for High Tunnel Production in West-Central Indiana, 2023
Get PDFColored sweet bell-shaped and tapered pepper is a summer crop that is grown by many small and medium-sized farming operations in Indiana. Growers can choose to grow peppers out in the field or plant them under a protective structure. Sweet peppers, in particular, benefit from the unique growing environment created by a high tunnel. Planting of peppers can start at least 2-4 weeks earlier in the spring, and production can continue into the fall until the first hard freeze. Pepper variety performance data for Indiana is not readily available. We are working hard to change that. To date, we have evaluated thirty pepper varieties, and each variety is assessed in two production cycles. This paper reports on five sweet bell and five tapered pepper entries evaluated at the Purdue Student Farm, West Lafayette, Indiana
Evaluation of Five Roma Tomato Cultivars in Southwest Michigan in 2023
Get PDFA Roma tomato cultivar trial was planted at the Southwest Michigan Research and Extension Center (42.081985, -86.354087, Benton Harbor, Michigan). HM Claus (HM), PanAmerican (PA), and Sakata (SK) seed companies donated five Roma tomato cultivars for plastic-mulch bedded and trellised hand harvest. Overall trial quality was excellent, despite a dry start that brought in insects, and hard rains that flared bacterial diseases
Effectiveness and characteristics of a new technology to reduce ammonia, carbon dioxide, and particulate matter pollution in poultry production with artificial turf floor
Get PDFAmmonia (NH3), carbon dioxide (CO2), and particulate matter (PM) are three major aerial pollutants that threaten the health of workers and animals in poultry production. An experiment was conducted in four laying hen rooms, with 735 to 740 hens per room, to study a new technology using artificial turf (AstroTurf®) floor for mitigation of the three pollutants. Air was sampled at three locations in each room to measure ammonia and carbon dioxide concentrations with an Innova 1412 multi-gas monitor for 83 days. Particulate matter was measured at one location at bird height in each room using a Dylos DC1700 Air Quality Monitor for 35 days. Ventilation rates in all rooms were monitored with RM Young anemometers. Compared with two wood shavings rooms, the two artificial turf rooms significantly (p\u3c0.01) reduced concentrations of ammonia by 51.0%, carbon dioxide by 13.5%, small particles by 77.5%, and large particles by 83.6%. They also significantly (p\u3c0.01) reduced ammonia and carbon dioxide emission rates by 38.4% and 8.3%, respectively. The artificial turf rooms’ lower ammonia concentrations and emissions were a result of lower manure pH. The artificial turf rooms also retained more nitrogen in manure. Lower carbon dioxide concentrations and emissions were partially attributed to less carbon dioxide released from manure. Lower PM concentrations were related to reduced PM sources on floor surfaces. Artificial turf rooms had smaller in-room ammonia and carbon dioxide concentration gradients. Artificial turf is a promising new technology to improve indoor air quality in and reduce pollutant emissions from poultry production
COVID-19 as a Magnifying Glass: Exploring the Importance of Relationships as Education Students Learn and Teach Robotics via Zoom
Get PDFEd+gineering, an NSF-funded program, adapted hands-on robotics instruction for online delivery in response to the COVID-19 pandemic. This qualitative multiple case study shares the experiences of participating education students in spring 2021 as they collaborated virtually with engineering students and fifth graders to engineer bioinspired robots in an afterschool technology club adapted to be virtual. The online context reduced the education students’ interactions with people other than the engineering students and fifth graders on their team and thus positioned COVID-19 as a metaphorical magnifying glass amplifying the critical role that these relationships played in influencing the project’s outcomes. Through analyzing short-answer reflections, the researchers observed patterns in the ways the education students’ interactions with their engineering and fifth-grade partners shaped their teaching self-efficacy and intention to integrate engineering and coding. Education students appeared to gain the most self-efficacy from feeling supported by, but not dependent upon, their engineering partners, and from adopting engineering-teaching roles. Satisfying interactions with fifth graders and successful production of functioning robots appeared to enhance education students’ intention to integrate engineering and coding into their future instruction. Education students reported gaining self-efficacy for both engineering and coding during the experience, but were more likely to report feeling confident about teaching engineering than teaching coding at the project’s end. Implications and lessons learned are shared, which may be particularly relevant for educators who prepare elementary education students to teach engineering in K-6 settings
Second Reaction: Garvey’s Choice: A Perfect Novel Study for Children on the Body and Acceptance
Get PDFTerada Torahiko, a Physicist and a Haikai Poet
Get PDFTerada Torahiko is known as a scientific essayist in Japan, but hardly anyone knows he was a haikai poet as well as a physicist. According to him, haikai poetry and physics are two different ways of conceiving Nature, both valid and perhaps complementary to each other. Seeing his research in physics looking for regularities in apparently irregular phenomena in everyday life, we may say his haiku haikai spirit is manifest there and that he was pioneering a new science such as the one developed later by Ilya Prigogine. His association of haiku haikai poetry and Freudian interpretations of dreams leads us to rethink the relation between science and literature. This paper examines Terada\u27s poetics as well as his research in physics in order to see how one can associate the Two Cultures separated from each other for such a long time
Remembering Complicity and Resistance: A Review of Mihaela Mihai’s \u3cem\u3ePolitical Memory and the Aesthetics of Care: The Art of Complicity and Resistance\u3c/em\u3e (2022)
Get PDFThis article offers a review of Mihaela Mihai’s book Political Memory and the Aesthetics of Care: The Art of Complicity and Resistance (2022). In it, Mihai courageously brings together insights from critical theory, political and legal science, philosophy, literary studies, and feminist theory to argue for the need of rearticulating how we remember complicity and resistance in the aftermath of political violence. Mihai develops her argument in three steps. First, she provides an account of how complicity and resistance are misremembered after systemic violence. Second, she tracks the political, epistemic and ethical consequences that this faulty work of memory-making holds for the present and future. And third, she proposes a strategy for challenging reductive narratives of the past and fostering more nuanced models of remembrance. The review analyses each of these steps with the aim of sketching out Mihai’s contribution to the burgeoning scholarship on complicity and implication in violence