Heather Jordon

May 24th, 2018

El-Zanati, S. I., Jongthawonwuth, U., Jordon, H., & Vanden Eynden, C. (2018). Decomposing the complete graph and the complete graph minus a 1-factor into copies of a graph G where G is the union of two disjoint cycles. European Journal of Combinatorics, 68, 120-131.

Abstract: Let G of order n be the vertex-disjoint union of two cycles. It is known that there exists a G-decomposition of Kv for all v ≡ 1 (mod 2n). If G is bipartite and x is a positive integer, it is also known that there exists a G-decomposition of Knx − I, where I is a 1-factor. If G is not bipartite, there exists a G-decomposition of Kn if n is odd, and of Kn − I, where I is a 1-factor, if n is even. We use novel extensions of the Bose construction for Steiner triple systems and some recent results on the Oberwolfach Problem to obtain a G-decomposition of Kv for all v ≡ n (mod 2n) when n is odd, unless G = C4C5 and v = 9. If G consists of two odd cycles and n ≡ 0 (mod 4), we also obtain a G-decomposition of Kv − I, for all v ≡ 0 (mod n), v ≠ 4n.

Zhen Li

May 2nd, 2018

Li, Z., & Liao, Q. (2018). Economic solutions to improve cybersecurity of governments and smart cities via vulnerability markets. Government Information Quarterly, 35(1), 151-160.

Abstract: Cities are becoming smarter and smarter. While the rapid progress in smart city technologies is changing cities and the lifestyle of the people, it creates also huge attack surfaces for potential cyber attacks. The potential vulnerabilities of smart city products and imminent attacks on smart city infrastructure and services will have significant consequences that can cause substantial economic and noneconomic losses, even chaos, to the cities and the people. In this paper we study alternative economic solutions ranging from incentive mechanisms to market-based solutions to motivate governments, smart product vendors, and vulnerability researchers and finders to improve the cybersecurity of smart cities and e-government. These solutions can be integrated into policy instruments in defending smart cities and e-governments against cyber attacks.

Brad Chase

May 2nd, 2018

Chase, B., Meiggs, D., Ajithprasad, P., & Slater, P. A. (2018). What is left behind: Advancing interpretation of pastoral land-use in Harappan Gujarat using herbivore dung to examine biosphere strontium isotope (87Sr/86Sr) variation. Journal of Archaeological Science, 92, 1-12.


The analysis of strontium isotopes in archaeologically preserved biological tissues is most productive when these can be compared to naturally occurring variation in strontium isotope ratios across the physical landscape. Such work is in its infancy in South Asia. Here, we report on the first attempt to monitor 87Sr/86Sr variation across the Indian state of Gujarat using herbivore dung. As it incorporates plant material from throughout an individual animal’s grazing range, herbivore dung averages local isotopic variation in palatable vegetation and is therefore an ideal material for use in studies involving domestic livestock. In our analysis of 125 dung samples from 38 sampling locations across the study area, 87Sr/86Sr values and geographic variation are commensurate with expectations based on regional geology. The values that we report are significantly different from those reported for both ecosystem elements and archaeological humans and livestock that have been published for other regions of the Indus Civilization (2600–1900 BC). No individual humans or livestock in these studies appear to have their origins in Gujarat. The present study further allows for more detailed interpretations of our previously published study of strontium isotope ratios in faunal remains from the walled Indus manufacturing center of Bagasra in Gujarat (Chase et al., 2014b). Specifically, it is now clear that while most livestock show very little movement within the period of enamel formation, their places of origin were scattered throughout central Saurashtra, adjacent to the site, suggesting that a portion of the livestock consumed at Bagasra were initially raised in the many small unexcavated villages in the area. There is little evidence for the procurement of livestock from further afield within the region and none for livestock originating outside the region. These results demonstrate that monitoring geographic 87Sr/86Sr variation using herbivore dung has the potential to significantly advance archaeological interpretation of livestock mobility in the past and is applicable anywhere that modern livestock graze on natural vegetation.

Betty Okwako

March 29th, 2018

Grace, B. L., Nawyn, S. J., & Okwako, B. (2018). The Right to Belong (If You Can Afford It): Market-based Restrictions on Social Citizenship in Refugee Resettlement. Journal of Refugee Studies, 31(1), 42-62.

Abstract: This article uses data from face-to-face interviews with recently resettled Burundian and Burmese refugees in Michigan to explore the concept of market citizenship. Market citizenship (Brodie 1997) is defined as the allocation of citizenship rights based on an individual’s economic power and participation in the labour market. While refugees have legal access to certain social rights, through the limitations of market citizenship, they are frequently denied access to those rights. Our data illustrates some ways in which that denial occurs, but also points to ways that refugees use family relations to circumnavigate the barriers to social citizenship that they frequently experience during the immediate resettlement period. Refugee families reassemble household configurations such that they increase the number of work-eligible household members, adjusting what we call the ‘neo-liberal citizenship ratio’. We argue that citizenship is broadly constrained by neo-liberalism, and that refugee families’ creative mobilization of familial and community relations are often the only avenue refugee households have to survive under neo-liberal constraints.

Heather Betz

March 27th, 2018

Betz, H. H., Eisenmann, J. C., Laurson, K. R., DuBose, K. D., Reeves, M. J., Carlson, J. J., et al. (2018). Physical Activity, BMI, and Blood Pressure in US Youth: NHANES 2003–2006. Pediatric Exercise Science, 1-8.

Abstract: Purpose: The objective of this study was to examine the independent and combined association of physical activity and body mass index (BMI) with blood pressure in youth. Methods: Youth aged 8–18 years from the 2003–2006 National Health and Nutrition Examination Survey (NHANES) with BMI, blood pressure, and physical activity (accelerometer) were included in the analyses. A total of 2585 subjects (1303 males; 47% of all 8- to 18-year-olds) met these criteria. Results: Obese youth had a systolic blood pressure that was 8 mm Hg higher than normal weight youth. A significant interaction between BMI and physical activity on blood pressure was found (P < .001), and group differences among the BMI/activity groups showed that the 3 obese groups and the overweight/least active group had significantly higher systolic blood pressure than the normal weight/active group across all analyses. The overweight/least active and normal weight/least active groups had significantly higher diastolic blood pressure than the normal weight/active group as well. Conclusions: This study showed a significant independent and combined association of BMI and physical activity with blood pressure in youth. Interventions need to focus on the reduction of fatness/BMI as a way to reduce the cardiovascular risk in youth.

Matthew Schoene

March 15th, 2018

Schoene, M. (2018). Urban Protest in the European Union. Ps-Political Science & Politics, 51(1), 73-78.

Jeffrey Carrier

March 15th, 2018

Pratt, H. L., Pratt, T. C., Morley, D., Lowerre-Barbieri, S., Collins, A., Carrier, J. C., Hart, K. M., Whitney, N. M. (2018). Partial migration of the nurse shark, Ginglymostoma cirratum (Bonnaterre), from the Dry Tortugas Islands. Environmental Biology of Fishes.

Abstract: Nurse sharks have not previously been known to migrate. Nurse sharks of the Dry Tortugas (DRTO) mating population have a highly predictable periodic residency cycle, returning to the Dry Tortugas Courtship and Mating Ground (DTCMG) annually (males) or bi- to triennially (females) during the June/July mating season. For 23 years we have followed the movements of 76 recaptured adults of a total of 115 tagged adults. Telemetry detections of 40 females tagged with acoustic transmitters show that most tagged and presumably post-partum females are continuously present in the DRTO in the fall, winter and early spring following the June mating season but these females depart in late March to early May. Detections reveal these females avoid the DTCMG completely during the next mating season, returning from late summer to fall. Telemetry records of nine of 17 adult males that co-habited with these females in the DTCMG depart DRTO waters every July. Both sexes may overwinter in the DRTO. Between 2011 and 2016 three males and five females with transmitters were detected to move up the west coast of Florida outside of the mating season as far north as the waters off Tampa Bay (335 km). Six others were only detected in the lower Florida Keys (292 km). Nine sharks returned to DRTO; one returned six times. Some overwintered and some resumed courtship in June, demonstrating both resident and migratory contingents within their population, partial migration and an ability to navigate with high spatial and temporal precision.

Albion College Alumnus Co-Author: Nick Whitney, ’00

Kevin Metz

February 16th, 2018

Dominguez, C., Metz, K. M., Hoque, M. K., Browne, M. P., Esteban-Tejeda, L., Livingston, C. K., et al. (2018). Continuous Flow Synthesis of Platinum Nanoparticles in Porous Carbon as Durable and Methanol-Tolerant Electrocatalysts for the Oxygen Reduction Reaction. Chemelectrochem, 5(1), 62-70.

Abstract:  The development and commercialization of direct methanol fuel cells (DMFCs) as energy conversion devices remains a challenge despite their advantages in terms of energy density and energy-conversion efficiency. The bottleneck for the development of DMFCs is mainly caused by the sluggish kinetics of the oxygen reduction reaction (ORR) at the cathode of fuel cells, and the effect of the so-called methanol crossover in state-of-the-art Pt/C electrocatalysts. Herein, we report for the first time an easily scalable continuous flow method based on ultraspray pyrolysis (USP) for the preparation of Pt nanoparticles directly embedded on highly porous carbon spheres. A study on the effect that post-synthesis treatment procedures have on the level of graphitization and catalytic properties is described. Use of USP results in a substantial reduction of the final Pt content with respect to typical Pt/C electrocatalysts, while yielding also excellent durability and tolerance to methanol crossover under acidic conditions. These results demonstrate that the USP method reported herein is a good candidate for its use in the preparation of ORR catalysts in commercial applications.

Albion College Student Co-Author: Corbin Livingston, ’16

Vicki Baker

February 7th, 2018

Crisp, G., Baker, V. L., Griffin, K. A., Lunsford, L. G., & Pifer, M. J. (2017). Mentoring Undergraduate Students. ASHE Higher Education Report, 43(1), 7-103.



Philip Voss

February 2nd, 2018

Cross, D. S., Pore, J. L., Andreoiu, C., Ball, G. C., Bender, P. C., Chester, A. S., et al. (2017). Conversion-electron spectroscopy and gamma-gamma angular correlation measurements in 116Sn. The European Physical Journal A, 53(11), 216.


The 116Sn nucleus was studied via the β   β− \beta^{-} decay of 116In utilizing the 8π  8\pi spectrometer and its auxiliary detectors at TRIUMF-ISAC. The resulting K-shell conversion coefficients, K/L ratios, and multipole mixing ratios are presented. The 2 + 3 2 + 1 931 23+→21+931 2_{3}^{+} \rightarrow 2_{1}^{+} 931 keV and 2 + 2 2 + 1 819 22+→21+819 2_{2}^{+} \rightarrow 2_{1}^{+} 819 keV transition mixing ratios were re-measured and found to be δ=+1.8 +0.7 0.5  δ=+1.8−0.5+0.7 \delta = +1.8_{-0.5}^{+0.7} and 1.83(8) −1.83(8) -1.83(8) , respectively. Newly measured mixing ratios for transitions among the low-lying I π =4 +  Iπ=4+ I^{\pi} = 4^{+} states in 116Sn, when combined with γ γ \gamma -ray intensity data, suggest that the 2529 keV 4 + 2  42+ 4_{2}^{+} state possesses a neutron broken-pair admixture in addition to its dominant proton 2p-2h component.

Geoffrey Cocks

February 2nd, 2018

Cocks, G. (2017). Fathers and Sons: The Kohut Odyssey. In R. Frie (Ed.), History Flows Through Us: Germany, the Holocaust and the Promise of Empathy. New York: Routledge.


Mareike Wieth

January 24th, 2018

DeCaro, M. S., Van Stockum, C. A., Jr., & Wieth, M. B. (2017). The relationship between working memory and insight depends on moderators: Reply to Chuderski and Jastrzêbski (2017). Journal of Experimental Psychology: Learning, Memory, and Cognition, 43(12), 2005-2010.

Abstract: Chuderski and Jastrzêbski (2017) found a positive relationship between working memory capacity and insight problem solving, and concluded that “people with less effective cognition” are therefore “less creative” (p. 2003). This interpretation discounts substantial evidence that devoting less executive control facilitates insight. We develop an initial framework for understanding these contradictory findings. We describe (a) how both working memory-demanding processes and less-demanding associative processes impact insight and (b) how individual, situational, and task-specific factors interact to influence whether greater working memory is a help or a hindrance. We propose that insight will be supported if the level of executive control used matches the level of control optimal for different phases of insight problem solving. We use this framework to explain why Chuderski and Jastrzębski’s (2017) findings may have differed from DeCaro, Van Stockum, and Wieth (2016), and offer direction for a more unified account of insight problem solving.

Ola Olapade and Ken Saville

January 24th, 2018

Hanauer, D. I., Graham, M. J., SEA-PHAGES, Betancur, L., Bobrownicki, A., Cresawn, S. G., et al. (2017). An inclusive Research Education Community (iREC): Impact of the SEA-PHAGES program on research outcomes and student learning. Proceedings of the National Academy of Sciences, 114(51), 13531-13536.

Abstract: Engaging undergraduate students in scientific research promises substantial benefits, but it is not accessible to all students and is rarely implemented early in college education, when it will have the greatest impact. An inclusive Research Education Community (iREC) provides a centralized scientific and administrative infrastructure enabling engagement of large numbers of students at different types of institutions. The Science Education Alliance–Phage Hunters Advancing Genomics and Evolutionary Science (SEA-PHAGES) is an iREC that promotes engagement and continued involvement in science among beginning undergraduate students. The SEA-PHAGES students show strong gains correlated with persistence relative to those in traditional laboratory courses regardless of academic, ethnic, gender, and socioeconomic profiles. This persistent involvement in science is reflected in key measures, including project ownership, scientific community values, science identity, and scientific networking.


Joseph Ho

January 24th, 2018

Ho, J. W. (2017). Imaging Missions, Visualizing Experience: American Presbyterian Photography, Filmmaking, and Chinese Christianity in Interwar Republican China. In A. E. Clark (Ed.), China’s Christianity: From Mission to Indigenous Church. Leiden: Brill.


Vicki Baker

January 18th, 2018

Baker, V. L., Lunsford, L. G., & Pifer, M. J. (2017). Developing Faculty in Liberal Arts Colleges: Aligning Individual Needs and Organizational Goals. New Brunswick, NJ: Rutgers University Press.

Abstract:  Developing Faculty Members in Liberal Arts Colleges analyzes the career stage challenges these faculty members must overcome, such as a lack of preparation for teaching, limited access to resources and mentors, and changing expectations for excellence in teaching, research, and service to become academic leaders in their discipline and at these distinctive institutions.  Drawing on research conducted at the thirteen institutions of the Great Lakes Colleges Association, Vicki L. Baker, Laura Gail Lunsford, and Meghan J. Pifer propose a compelling Alignment Framework for Faculty Development in Liberal Arts Colleges to show how these colleges succeed—or sometimes fail—in providing their faculties with the right support to be successful.

Philip Voss

January 18th, 2018

Jigmeddorj, B., Garrett, P. E., Andreoiu, C. A., Ball, G. C., Bruhn, T., Cross, D. S., et al. (2017). High-Statistics β+/EC-Decay Study of 122Xe. Physics Procedia, 90(Supplement C), 435-439.

Abstract:  Low-lying excited states of 122Xe have been studied via the β+/EC decay of 122Cs with the 8π γ-ray spectrometer at the TRIUMF Isotope Separator and Accelerator facility. The data collected have enabled the observation of new in-band transitions in the excited 0+ state bands. In addition, the 2+ members of the second 0+ and third 0+ state bands have been firmly confirmed by angular correlation analysis.

Tammy Jechura

January 11th, 2018

Woodard, M. A., Jechura, T. J., & Elias, E. P. (2017). Sleep and College Satisfaction. North American Journal of Psychology, 19(3), 573-584.

Abstract: College students face a number of obstacles to achieving proper sleep hygiene and this could have an impact on their overall college experience, as much as on their day-to-day functioning. The current study was designed to assess the relationship between sleep and satisfaction with overall college experience. It was hypothesized that poorer sleep, including fewer hours of sleep and lower quality of sleep, would be correlated with a more negative view of one’s college experience. Students currently enrolled in a small midwestern college (n=74; 52 females) were assessed for sleep quantity and quality using a modified version of the Pittsburgh Sleep Quality Index (adapted from Buysse et al., 1988). A second questionnaire, adapted from the Satisfaction with Life Scale and the Index for Job Satisfaction (Brayfield & Rothe, 1951; Diener et al., 1985), was used to measure satisfaction with college experience. Results revealed that individuals with better sleep hygiene also had higher college satisfaction levels. Additionally, a mediational regression showed that mood mediates the relationship between sleep and college satisfaction. This implies that greater sleep disturbance leads to a more negative mood in students which, in turn, leads to less satisfaction with college experience.

Abigail Cahill

January 8th, 2018

Cahill, A. E., De Jode, A., Dubois, S., Bouzaza, Z., Aurelle, D., Boissin, E., et al. (2017). A multispecies approach reveals hot-spots and cold-spots of diversity and connectivity in invertebrate species with contrasting dispersal modes. Molecular Ecology, 26(23), 6563-6577.

Abstract: Genetic diversity is crucial for species’ maintenance and persistence, yet is often overlooked in conservation studies. Species diversity is more often reported due to practical constraints, but it is unknown if these measures of diversity are correlated. In marine invertebrates, adults are often sessile or sedentary and populations exchange genes via dispersal of gametes and larvae. Species with a larval period are expected to have more connected populations than those without larval dispersal. We assessed the relationship between measures of species and genetic diversity, and between dispersal ability and connectivity. We compiled data on genetic patterns and life history traits in nine species across five phyla. Sampling sites spanned 600 km in the northwest Mediterranean Sea and focused on a 50 km area near Marseilles, France. Comparative population genetic approaches yielded three main results. (1) Species without larvae showed higher levels of genetic structure than species with free-living larvae but the role of larval type (lecithotrophic or planktotrophic) was negligible. (2) A narrow area around Marseilles, subject to offshore advection, limited genetic connectivity in most species. (3) We identified sites with significant positive contributions to overall genetic diversity across all species, corresponding with areas near low human population densities. In contrast, high levels of human activity corresponded with a negative contribution to overall genetic diversity. Genetic diversity within species was positively and significantly linearly related with local species diversity. Our study suggests that local contribution to overall genetic diversity should be taken into account for future conservation strategies.

Holger Elischberger, Eric Hill and Lynn Verduzco-Baker

January 8th, 2018

Elischberger, H. B., Glazier, J. J., Hill, E. D., & Verduzco-Baker, L. (2018). Attitudes Toward and Beliefs about Transgender Youth: A Cross-Cultural Comparison Between the United States and India. Sex Roles, 78, 142-160.

Abstract: Using an internet-based survey, we examined attitudes toward transgender youth in the United States and India, two cultures with differences in conceptualizations of gender and treatment of transgender individuals in society, law, and religion. We found generally positive attitudes toward transgender youth in our U.S. (n = 218), but moderately negative ones in our Indian (n = 217), sample. Consistent with the literature on prejudice against transgender adults in many Western societies, general social conservatism in the form of religious beliefs and political ideology, gender-specific conservatism in the form of gender binary belief, and endorsement of environmental rather than biological causes of transgender identity were the best predictors of U.S. participants’ attitudes, although personal contact with gender and sexual minorities also played a role at the bivariate level. These findings suggest that the processes underlying prejudice against transgender youth are similar to those that foster adult-directed transphobia in that cultural context. In contrast, religion-based disapproval and environmental causal attributions were the best predictors of Indian respondents’ attitudes, whereas gender binary belief played only a minor role, and political conservatism and personal contact no role at all. Our regression analyses accounted for considerably more of the variability in U.S. than in Indian participants’ attitudes, highlighting the need for additional (qualitative) work to identify the factors that promote transprejudice in India. We discuss these findings in light of cross-cultural differences between the two countries in terms of our predictors and consider implications for efforts to reduce prejudice against transgender youth.

Albion College Student Co-Author: Jessica Glazier, ’16

Joseph Ho

November 17th, 2017

Charles, B., & Ho, J. W. (Eds.). (2017). War and occupation in China : the letters of an American missionary from Hangzhou, 1937-1938. Lanham, Maryland: Lehigh University Press.

Mareike Wieth

November 9th, 2017

Burns, B. D., Zhang, Y., Wieth, M., & Touyz, S. (2017). An exploratory study of creativity and eating disorders. Journal of Eating Disorders, 5(1), 45.

Abstract: We examined whether cognitive rigidity associated with having an eating disorder generalized to creativity. One hundred twelve participants from the participant pool of an Australian university were given a measure of disordered eating (EDE-Q), asked if they had ever had a diagnosis of an eating disorder (16 reported yes), and given 3 min to generate alternative uses for a paper-clip. The alternative uses task yielded measures of creative fluency, originality, elaboration and flexibility. A logistic regression found that only lower flexibility predicted a self-reported ED diagnosis. Across the spectrum of disordered eating behaviour there was no association between creativity measures and EDE-Q global scores. Our results were consistent with previous findings of an association between cognitive inflexibility and having an ED. However we found no evidence that cognitive inflexibility generalized to creativity more broadly. Our results may lend support to Cognitive Remediation Therapy, but further study is required.

Vicki Baker

November 2nd, 2017

Baker, V., & Terosky, A. (2017). Early Career Faculty Mentoring: Career Cycles, Learning and Support. In D. A. Clutterbuck, F. K. Kochan, L. Lunsford, N. Dominguez & J. Haddock-Millar (Eds.), The SAGE Handbook of Mentoring: SAGE Publishing.

Philip Voss

October 20th, 2017

Voss, P., Drake, T. E., Starosta, K., Andreoiu, C., Ashley, R., Ball, G. C., et al. (2017). Doppler-shift attenuation lifetime measurement of the  36Ar 21+ level. Physical Review C, 96(2), 024305.


At TRIUMF, the TIGRESS Integrated Plunger device and its suite of ancillary detector systems have been implemented for charged-particle tagging and light-ion identification in coincidence with γ-ray spectroscopy for Doppler-shift lifetime studies and low-energy Coulomb excitation measurements. As a test of the device, the lifetime of the first 2+ excited state in 36Ar was measured from the γ-ray line shape of the 2+1 →0+g.s. transition using the Doppler-shift attenuation technique following Coulomb excitation. The line-shape signatures, vital for precision lifetime measurements, were significantly improved by enhanced reaction-channel selectivity using a complementary approach of kinematic gating and digital rise-time discrimination of recoiling charged particles in a silicon PIN diode array. The lifetime was determined by comparisons between the data and simulated line shapes generated using our TIGRESS Coulomb excitation code as an input to the Lindhard method, which was then extended and included as a class in geant4. The model-independent lifetime result of 490±50 fs corresponds to a reduced quadrupole transition strength of B(E2;2+1 →0+g.s.)=56±6 e2 fm4 and agrees well with previous intermediate energy Coulomb excitation measurements, thereby resolving reported discrepancies in the 2+1 level lifetime in this self-conjugate nucleus.

Carrie Booth Walling

October 12th, 2017

Deloffre, M. Z., & Walling, C. B. (2017). Contentious Politics in the United States: What Role for Political Scientists? . PS: Political Science and Politics, 50(4), 985-989.


Ola Olapade

October 2nd, 2017

Olapade, O. A. (2018). Community Composition and Diversity of Coastal Bacterioplankton Assemblages in Lakes Michigan, Erie, and Huron. Microbial Ecology, 75(3), 598-608.

Abstract: The Laurentian Great Lakes, including Lakes Superior, Michigan, Huron, Erie, and Ontario, located in the eastern part of North America are considered the largest of freshwater lakes in the world; however, very little is known about the diversity and distribution of indigenous microbial assemblages within these vast bodies of freshwater systems. Therefore, to delineate the microbial structure and community composition in these aquatic environments, combinations of high-throughput sequencing and fluorescent in situ hybridization (FISH) approaches were utilized to quantitatively characterize the occurrence, diversity, and distribution of bacterioplankton assemblages in six different sites located along the coastal regions of Lakes Michigan, Huron, and Erie. Phylogenetic examination showed a diverse bacterial community belonging to 11 different taxonomic groups. Pyrosequencing results revealed that the majority of the sequences were clustered into four main groups, i.e., Proteobacteria, Bacteriodetes, Actinobacteria, and Cyanobacteria, while fluorescent in situ hybridization also showed the numerical dominance of members of the Gammaproteobacteria and the Cytophaga-Flavobacterium in the six lake sites examined. Overall, the assemblages were shown to be quite diverse in distribution among the lake sites examined, comprising mostly of various heterotrophic populations, with the exception of the Lake Erie-Sandusky Bay site with more than 50% domination by autotrophic Cyanobacteria. This indicates that combinations of factors including water chemistry and various anthropogenic disturbances as well as the lake morphometric characteristics are probably influencing the community structure and diversity of the bacterial assemblages within the systems.

Nicolle Zellner

September 22nd, 2017

Huang, Y. H., Minton, D. A., Hirabayashi, M., Elliott, J. R., Richardson, J. E., Fassett, C. I., Zellner, N.E.B. (2017). Heterogeneous impact transport on the Moon. Journal of Geophysical Research-Planets, 122(6), 1158-1180.

Abstract: Impact cratering is the dominant process for transporting material on the Moon’s surface. An impact transports both proximal material (continuous ejecta) locally and distal ejecta (crater rays) to much larger distances. Quantifying the relative importance of locally derived material versus distal material requires understandings of lunar regolith evolution and the mixing of materials across the lunar surface. The Moon has distinctive albedo units of darker mare basalt and brighter highland materials, and the contacts between these units are ideal settings to examine this question. Information on the amount of material transported across these contacts comes from both the sample collection and remote sensing data, though earlier interpretations of these observations are contradictory. The relatively narrow (similar to 4-5 km wide) mixing zone at mare/highland contacts had been interpreted as consistent with most material having been locally derived from underneath mare plains. However, even far from these contacts where the mare is thick, highland material is abundant in some soil samples (>20%), requiring transport of highland material over great distances. Any model of impact transport on the Moon needs to be consistent with both the observed width of mare/highland contacts and the commonality of nonmare material in mare soil samples far from any contact. In this study, using a three-dimensional regolith transport model, we match these constraints and demonstrate that both local and distal material transports are important at the lunar surface. Furthermore, the nature of the distal material transport mechanism in discrete crater rays can result in substantial heterogeneity of surface materials.

Allison Harnish

September 22nd, 2017

Graddy-Lovelace, G., Harnish, A., & Hazlewood, J. A. (2016). World Is Burning, Sky Is Falling, All Hands on Deck! Reflections on Engaged and Action-Oriented Socio-Environmental Scholarship. In N. Haenn, R. Wilk & A. Harnish (Eds.), The Environment in Anthropology: A Reader in Ecology, Culture, and Sustainable Living (Second edition ed., pp. 445-481). New York: New York University Press.

Ken Saville

September 7th, 2017

Leung, W., Shaffer, C. D., Chen, E. J., Quisenberry, T. J., Ko, K., Braverman, J. M., et al. (2017). Retrotransposons Are the Major Contributors to the Expansion of the Drosophila ananassae Muller F Element. G3-Genes Genomes Genetics, 7(8), 2439-2460.

Abstract: The discordance between genome size and the complexity of eukaryotes can partly be attributed to differences in repeat density. The Muller F element (similar to 5.2 Mb) is the smallest chromosome in Drosophila melanogaster, but it is substantially larger (>18.7 Mb) in D. ananassae. To identify the major contributors to the expansion of the F element and to assess their impact, we improved the genome sequence and annotated the genes in a 1.4-Mb region of the D. ananassae F element, and a 1.7-Mb region from the D element for comparison. We find that transposons (particularly LTR and LINE retrotransposons) are major contributors to this expansion (78.6%), while Wolbachia sequences integrated into the D. ananassae genome are minor contributors (0.02%). Both D. melanogaster and D. ananassae F-element genes exhibit distinct characteristics compared to D-element genes (e.g., larger coding spans, larger introns, more coding exons, and lower codon bias), but these differences are exaggerated in D. ananassae. Compared to D. melanogaster, the codon bias observed in D. ananassae F-element genes can primarily be attributed to mutational biases instead of selection. The 59 ends of F-element genes in both species are enriched in dimethylation of lysine 4 on histone 3 (H3K4me2), while the coding spans are enriched in H3K9me2. Despite differences in repeat density and gene characteristics, D. ananassae F-element genes show a similar range of expression levels compared to genes in euchromatic domains. This study improves our understanding of how transposons can affect genome size and how genes can function within highly repetitive domains.

Vicki Baker

September 7th, 2017

Baker, V. L., Terosky, A. L., & Martinez, E. (2017). Faculty Members’ Scholarly Learning Across Institutional Types (ASHE Higher Education Report, Volume 43, Number 2): Jossey-Bass.

Philip Voss

August 1st, 2017

Pore, J. L., Cross, D. S., Andreoiu, C., Ashley, R., Ball, G. C., Bender, P. C., et al. (2017). Study of the β decay of 116m1In: A new interpretation of low-lying 0+ states in 116Sn. The European Physical Journal A, 53(2), 27.

Abstract: The 116Sn nucleus contains a collective rotational band originating from proton π 2p-2h excitations across the proton Z = 50 shell gap. Even though this nucleus has been extensively investigated in the past, there was still missing information on the low-energy interband transitions connecting the intruder and normal structures. The low-lying structure of 116Sn was investigated through a high-statistics study of the β decay of 116m1In with the 8π spectrometer and its ancillary detectors at TRIUMF. These measurements
are critical in order to properly characterize the π 2p-2h rotational band. Weak γ-decay branches are observed utilizing γ-γ coincidence spectroscopy methods, leading to the first direct observation of the
85 keV 2+2 → 0+3 γ ray with a transition strength of B(E2) = 99.7(84) W.u. The analysis of these results strongly suggests that the 2027 keV 0+3 state should replace the previously assigned 1757 keV 0+2 state as the band-head of the π 2p-2h rotational band.