Now showing items 1-20 of 6732

    • Black Campus Life

      Tichavakunda, Antar (SUNY Press, 2021-12-01)
      An in-depth ethnography of Black engineering students at a historically White institution, Black Campus Life examines the intersection of two crises, up close: the limited number of college graduates in science, technology, engineering, and math (STEM) fields, and the state of race relations in higher education. Antar Tichavakunda takes readers across campus, from study groups to parties and beyond as these students work hard, have fun, skip class, fundraise, and, at times, find themselves in tense racialized encounters. By consistently centering their perspectives and demonstrating how different campus communities, or social worlds, shape their experiences, Tichavakunda challenges assumptions about not only Black STEM majors but also Black students and the “racial climate” on college campuses more generally. Most fundamentally, Black Campus Life argues that Black collegians are more than the racism they endure. By studying and appreciating the everyday richness and complexity of their experiences, we all—faculty, administrators, parents, policymakers, and the broader public—might learn how to better support them.
    • Virtual Connectedness: Working Together to Create a Companion Site for Spanish Phonetics & Phonology

      Escudero, Alejandra; Carbone, Alyssa; Barreca, Nicole (2021)
      The creation of a resource for students who are struggling or who simply want to practice their skills, that is accessible to all, is crucial, especially during the current times of virtual learning. We have created a companion site for the Spanish Phonetics & Phonology course for all SUNY students to use, as there is no resource of its kind, that is in the target language (Spanish) and is free of cost for all students and faculty. This will be a long-lasting tool that will allow for clarification of concepts, practice with engaging virtual exercises, and many opportunities to exercise skills and learning. After students learn concepts in class, they can access the companion site to further reinforce the comprehension of content, test what they know, see diagrams, practice, and get tips from other students who have already taken the course. We use h5p plugins in order to create different types of interactive activities for students in each module, which enhance the practice and learning experience. Each module in the site follows the same structure: 1) objectives of the module, 2) a short pre-reading quiz, 3) the content of the module, used to review concepts covered in class with examples and diagrams, 4) a “tips from other students” section so that students can learn from other students who already took the course and remember some tricks that will help them when preparing for exams, 5) a section for activities and practice, and 6) a summary of what was covered in the module. Two key resources that have been crucial to the creation of the companion site are Pressbooks and Monday.com. Pressbooks is the site used to create content and interactive activities. Monday.com is a site that allows for task management, progress tracking, making comments, and for student-faculty accountability. This companion site is an Open Educational Resource (OER) and is ADA-compliant, so that all students- regardless of income and potential disability- can access it for free. This resource also falls into the category of Open Pedagogy, with our companion site being one of the few Open Pedagogy projects across the SUNY system, where content is planned and created by students under faculty supervision.
    • Meta-Analysis of Alzheimer's Disease Risk with Obesity, Diabetes, and Related Disorders

      Profenno, Louis A.; Porsteinsson, Anton P.; Faraone, Stephen V. (Elsevier BV, 2010-03)
      Background: Late-onset Alzheimer’s disease (AD) is a multifactorial and heterogeneous disorder with major risk factors including advanced age, presence of an apolipoprotein E 4 (APOE4) allele, and family history of AD. Other risk factors may be obesity and diabetes and related disorders, which are highly prevalent. Methods: We reviewed longitudinal epidemiological studies of body mass, diabetes, metabolic syndrome, and glucose and insulin levels on risk for AD. We conducted meta-analyses of the results from these studies. Results: For obesity assessed by body mass index, the pooled effect size for AD was 1.59 (95% confidence interval [CI] 1.02–2.5; z 2.0; p .042), and for diabetes, the pooled effect size for AD was 1.54 (95% CI 1.33–1.79; z 5.7; p .001). Egger’s test did not find significant evidence for publication bias in the meta-analysis for obesity (t 1.4, p .21) or for diabetes (t .86, p .42). Since these disorders are highly comorbid, we conducted a meta-analysis combining all studies of obesity, diabetes, and abnormal glucose or insulin levels, which yielded a highly significant pooled effect size for AD of 1.63 (95% CI 1.39 –1.92; z 5.9; p .001). Conclusions: Obesity and diabetes significantly and independently increase risk for AD. Though the level of risk is less than that with the APOE4 allele, the high prevalence of these disorders may result in substantial increases in future incidence of AD. Physiological changes common to obesity and diabetes plausibly promote AD.
    • RASD2, MYH9, and CACNG2 Genes at Chromosome 22q12 Associated with the Subgroup of Schizophrenia with Non-Deficit in Sustained Attention and Executive Function

      Liu, Yu-Li; Fann, Cathy Shen-Jang; Liu, Chih-Min; Chen, Wei J.; Wu, Jer-Yuarn; Hung, Shuen-Iu; Chen, Chun-Houh; Jou, Yuh-Shan; Liu, Shi-Kai; Hwang, Tzung-Jeng; et al. (Elsevier BV, 2008-11)
      Background: In a previous linkage study of schizophrenia that included Taiwanese samples, the marker D22S278 (22q12.3) was significantly linked to schizophrenia (p .001). Methods: We conducted fine mapping of the implicated genomic region, with 47 validated single nucleotide polymorphism (SNP) markers around 1 Mb of D22S278, in a Taiwanese sample of 218 pedigrees with at least 2 siblings affected with schizophrenia. We examined the association of these SNPs and their haplotypes with schizophrenia and with subgroups defined by the presence and absence of deficits in sustained attention as assessed by undegraded and degraded continuous performance tests (CPTs). We also examined subgroups defined by deficits in categories achieved in the Wisconsin Card Sort Test (WCST). Results: Three of five candidate vulnerability genes (RASD2, APOL5, MYH9, EIF3S7, and CACNG2), which had marginally significant associations with schizophrenia, had significant associations with schizophrenic patients who did not have deficits in sustained attention on the undegraded CPT (RASD2 gene SNP rs736212; p .0008 with single locus analysis) and the degraded CPT (MYH9 gene haplotype 1-1-1-1 of SNP rs3752463 - rs1557540 - rs713839 - rs739097; p .0059 with haplotype analysis). We also found a significant association for patients who showed no deficits in executive function as measured by categories achieved in the WCST (CACNG2 gene haplotype 2-1-1-1 of SNP rs2267360 - rs140526 - rs1883987 - rs916269; p .0163 with haplotype analysis). Conclusions: The genes RASD2, MYH9, and CACNG2 might be vulnerability genes for neuropsychologically defined subgroups of schizophrenic patients.
    • Advanced Paternal Age and Early Onset of Schizophrenia in Sporadic Cases: Not Confounded by Parental Polygenic Risk for Schizophrenia

      Wang, Shi-Heng; Hsiao, Po-Chang; Yeh, Ling-Ling; Liu, Chih-Min; Liu, Chen-Chung; Hwang, Tzung-Jeng; Hsieh, Ming H.; Chien, Yi-Ling; Lin, Yi-Ting; Huang, Yen-Tsung; et al. (Elsevier BV, 2019-07)
      BACKGROUND:Whether paternal age effect on schizophrenia is a causation or just an association due to con-founding by selection into late parenthood is still debated. We investigated the association between paternal age andearly onset of schizophrenia in offspring, controlling for both paternal and maternal predisposition to schizophrenia asempirically estimated using polygenic risk score (PRS) derived from the Psychiatric Genomics Consortium.METHODS:Among 2923 sporadic schizophrenia cases selected from the Schizophrenia Trio Genomic Research inTaiwan project, 1649 had parents’genotyping data. The relationships of paternal schizophrenia PRS to paternal ageatfirst birth (AFB) and of maternal schizophrenia PRS to maternal AFB were examined. A logistic regression model ofpatients’early onset of schizophrenia (#18 years old) on paternal age was conducted.RESULTS:Advanced paternal age over 20 years exhibited a trend of an increasing proportion of early onset ofschizophrenia (odds ratio per 10-year increase in paternal age = 1.28,p= .007) after adjusting for maternal age, sex,and age. Older paternal AFB also exhibited an increasing trend of paternal schizophrenia PRS. Additionally, aU-shaped relationship between maternal AFB and maternal schizophrenia PRS was observed. After adjusting forboth paternal and maternal schizophrenia PRS, the association of paternal age with patients’early onset ofschizophrenia remained (odds ratio = 1.29,p= .04).CONCLUSIONS:The association between paternal age and early onset of schizophrenia was not confounded byparental PRS for schizophrenia, which partially captures parental genetic vulnerability to schizophrenia. Ourfindingssupport an independent role of paternal age per se in increased risk of early onset of schizophrenia in offspring
    • Ships as Sites of Memory: Collecting Maritime History

      Rapp, Renae (2021-10-07)
      A poster presentation from Mid-Atlantic Regional Archives Conference (MARAC) October 7, 2021.
    • A Twin Study of Sexual Behavior in Men

      Lyons, Michael J.; Koenen, Karestan C.; Buchting, Francisco; Meyer, Joanne M.; Eaves, Lindon; Toomey, Rosemary; Eisen, Seth A.; Goldberg, Jack; Faraone, Stephen V.; Ban, Rachel J.; et al. (Springer Science and Business Media LLC, 2004-04)
      The role of genetic and environmental influences on age of initiation of first sexual relations and engaging in sexual activity with multiple partners (10 or more partners in 1 year) was investigated in male twins (N = 6, 744) from the Vietnam Era Twin Registry. Individual differences in both types of sexual behaviors were heritable, but only age of onset of sexual relations was significantly influenced by the environment shared by the twins. There was a moderate negative correlation between age of initiation of sexual relations and the multiple partners variable; initiating sexual relations earlier was associated with a higher probability of having multiple partners. The additive genetic influence on age of initiation also influenced the multiple partners variable. The substantial unique environmental influences on each variable were uncorrelated with each other. The data suggest that the observed association between age of initiation of sexual relations and having multiple partners is due to genetic influences common to both behaviors.
    • Associations Between ADHD and Psychoactive Substance use Disorders:Findings from a Longitudinal Study of High-Risk Siblings of ADHD Children

      Milberger, Sharon; Biederman, Joseph; Faraone, Stephen V.; Wilens, Timothy; Chu, Monica P. (Wiley, 1997-01)
      The purpose of this study was to determine whether the single nucleotide polymorphisms (SNPs) within candidate genes for attention deficit hyperactivity disorder (ADHD) are associated with the age at onset for ADHD. One hundred and forty-three SNPs were genotyped across five candidate genes (DRD5, SLC6A3, HTR1B, SNAP25, DRD4) for ADHD in 229 families with at least one affected offspring. SNPs with the highest estimated power to detect an association with age at onset were selected for each candidate gene, using a power-based screening procedure that does not compromise the nominal significance level. A time-to-onset analysis for family-based samples was performed on these SNPs to determine if an association exists with age at onset for ADHD. Seven consecutive SNPs surrounding the D5 dopamine receptor gene (DRD5), were associated with the age at onset for ADHD; FDR adjusted q-values ranged from 0.008 to 0.023. This analysis indicates that individuals with the risk genotype develop ADHD earlier than individuals with any other genotype. A haplotype analysis across the 6 significant SNPs that were in linkage disequilibrium with one another, CTCATA, was also found to be significant (p-value = 0.02). We did not observe significant associations with age at onset for the other candidate loci tested. Although definitive conclusions await independent replication, these results suggest that a variant in DRD5 may affect age at onset for ADHD
    • The Impact of Ruling Family Board Members on the Performance of Commercial Banks

      Kienpin, Tee; Garas, Samy (Association for Accountancy & Business Affairs, 2021)
      We examine the impact of royal family involvement in the ownership and strategic management of commercial banks within the Gulf Cooperation Council (GCC) region. Existing finance literature has examined the impact of board members with political connections on bank performance to find mixed evidence of whether such connections have a positive or negative impact. However, such empirical studies have not been applied to the commercial banks of the GCC region. Our empirical analysis uses four separate metrics of performance to examine what influence board membership, board chairmanship and bank ownership shares by a royal family member has on bank performance. Our panel data analysis of GCC commercial bank data across six countries from 2013 to 2018 reveals that all three potential royal family roles exert a positive influence over GCC commercial bank performance. We derive these empirical results using relevant control variables at both the firm level and the industry level. Furthermore, we apply a system generalized moments of methods specification to our sample and find that these results are invariant to various specification robustness checks. Our results appear to support the Resource Dependency Theory (RDT), where the commercial banks rely on external resources to enhance financial performance.
    • Wildlife Response to Wildfire in a Northern New York Jack Pine Barrens

      Cave, Hannah; Adams, Matthew; Jaeger, Tristan; Peet, Taylor; Staats, Lloyd; Garneau, Danielle; Lesser, Mark (MDPI AG, 2021-05-25)
      Natural disturbances are an integral part of forested ecosystem function and successional path-ways. In many forested ecosystems, wildfires are critical to shaping composition and structure, which in turn has major implications for wildlife usage and behavior. In July 2018 a wildfire burned 225 ha of the Altona Flat Rock pine barrens in northern New York. This event presented the opportunity to study how wildlife respond to the immediate effects of disturbance in this unique habitat but also how that response would change through time as regeneration progressed. Game cameras were deployed from September 2018-September 2020 at two reference (unburned) and two disturbed (burned) sites within the pine barrens. We analyzed total and seasonal occurrences, to determine how usage differed between disturbed and reference conditions, and with time since disturbance. Additionally, for coyote (Canis latrans, Say), white-tailed deer (Odocoileus virginianus, Zimmermann), and snowshoe hare (Lepus americanus, Erxleben), we evaluated daily activity patterns and overlap to determine how predator-prey relationships differed between conditions, and with time since disturbance. Over 730 days a total of 1,048 wildlife occurrences were captured across 23 wildlife species. Fifty-seven percent of all occurrences were at reference sites with over 100 more occurrences than disturbed sites, however, differences were most pronounced immediately following the fire and overall occurrences have grown more similar between the sites over time. Specifically, deer and hare were found more often at reference sites immediately following the fire, but shifted to using both conditions equally by the first growing season. Habitat overlap among sympatric prey (deer, hare) can be explained by understory regeneration increasing foraging opportunities and concealment cover in the disturbed condition, while predators (coyotes) tracked prey availability regardless of the habitat condition. This study provides wildlife management guidance on habitat use and response to disturbance for this unique sandstone pavement barrens.
    • Predicted Metabolic Function of the Gut Microbiota of Drosophila melanogaster

      Ankrah, Nana Y. D.; Barker, Brandon E.; Song, Joan; Wu, Cindy; McMullen, John G.; Douglas, Angela E. (American Society for Microbiology, 2021-06-29)
      An important goal for many nutrition-based microbiome studies is to identify the metabolic function of microbes in complex microbial communities and their impact on host physiology. This research can be confounded by poorly understood effects of community composition and host diet on the metabolic traits of individual taxa. Here, we investigated these multiway interactions by constructing and analyzing metabolic models comprising every combination of five bacterial members of the Drosophila gut microbiome (from single taxa to the five-member community of Acetobacter and Lactobacillus species) under three nutrient regimes. We show that the metabolic function of Drosophila gut bacteria is dynamic, influenced by community composition, and responsive to dietary modulation. Furthermore, we show that ecological interactions such as competition and mutualism identified from the growth patterns of gut bacteria are underlain by a diversity of metabolic interactions, and show that the bacteria tend to compete for amino acids and B vitamins more frequently than for carbon sources. Our results reveal that, in addition to fermentation products such as acetate, intermediates of the tricarboxylic acid (TCA) cycle, including 2-oxoglutarate and succinate, are produced at high flux and cross-fed between bacterial taxa, suggesting important roles for TCA cycle intermediates in modulating Drosophila gut microbe interactions and the potential to influence host traits. These metabolic models provide specific predictions of the patterns of ecological and metabolic interactions among gut bacteria under different nutrient regimes, with potentially important consequences for overall community metabolic function and nutritional interactions with the host.
    • Succinate: a microbial product that modulates Drosophila nutritional physiology

      Zhang, Freya Q.; McMullen, John G.; Douglas, Angela E.; Ankrah, Nana Y.D. (Wiley, 2021-02-24)
      Gut microorganisms process food in animal guts and release many metabolic by-products, which are predicted to influence host physiological processes such as energy and lipid metabolism. Here, we investigate how succinate, a TCA cycle intermediate that is a major predicted release product of gut bacteria in Drosophila, influences the nutritional physiology of its Drosophila host. We administered succinate as a dietary supplement to microbe- free Drosophila, and quantified key nutritional indices. Dietary succinate significantly reduced fly lipid levels by up to ∼50%. This response was not replicated in parallel experiments conducted with dietary fumarate supplement, indicating that it could not be attributed to a general effect of TCA intermediates. We hypothesize that microbe-derived succinate may contribute to the reduced lipid content of Drosophila bearing gut bacteria, relative to axenic Drosophila. More generally, this study high- lights the importance of microbial-derived metabolites as regulators of host metabolism.
    • Can athletes be tough yet compassionate to themselves? Practical implications for NCAA mental health best practice no. 4

      Stamatis, Andreas; Deal, Paul J.; Morgan, Grant B.; Forsse, Jeffrey S.; Papadakis, Zacharias; McKinley-Barnard, Sarah; Scudamore, Eric M.; Koutakis, Panagiotis (Public Library of Science (PLoS), 2020-12-31)
      Recent tragic events and data from official NCAA reports suggest student-athletes’ wellbeing is compromised by symptoms of mental health (MH) disorders. Self-compassion (SC) and mental toughness (MT) are two psychological constructs that have been shown effective against stressors associated with sports. The purpose of this study was to investigate SC, MT, and MH in a NCAA environment for the first time and provide practical suggestions for MH best practice No.4. In total, 542 student-athletes participated across Divisions (Mage = 19.84, SD = 1.7). Data were collected through Mental Toughness Index, Self-Compassion Scale, and Mental Health Continuum–Short Form. MT, SC (including mindfulness), and MH were positively correlated. Males scored higher than females on all three scales. No differences were found between divisions. SC partially mediated the MT-MH relationship, but moderation was not significant. Working towards NCAA MH best practice should include training athletes in both MT and SC skills (via mindfulness).
    • High-Intensity Interval Exercise Performance and Short-Term Metabolic Responses to Overnight-Fasted Acute-Partial Sleep Deprivation

      Papadakis, Zacharias; Forsse, Jeffrey S.; Stamatis, Andreas (MDPI AG, 2021-04-01)
      People practicing high-intensity interval exercise (HIIE) fasted during the morning hours under a lack of sleep. Such a habit may jeopardize the health benefits related to HIIE and adequate sleep. Fifteen habitually good sleeper males (age 31.1 ± 5.3 SD year) completed on a treadmill two isocaloric (500 kcal) HIIE sessions (3:2 min work:rest) averaged at 70% VO2reserve after 9–9.5 h of reference sleep exercise (RSE) and after 3–3.5 h of acute-partial sleep deprivation exercise (SSE). Diet and sleep patterns were controlled both 1 week prior and 2 days leading up to RSE and SSE. HIIE related performance and substrate utilization data were obtained from the continuous analysis of respiratory gases. Data were analyzed using repeated measures ANOVA with the baseline maximum oxygen uptake (VO2max) and body fat percentage (BF%) as covariates at p < 0.05. No difference was observed in VO2max, time to complete the HIIE, VE, RER, CHO%, and FAT% utilization during the experimental conditions. Whether attaining an adequate amount of sleep or not, the fasted HIIE performance and metabolism were not affected. We propose to practice the fasted HIIE under adequate sleep to receive the pleiotropic beneficial effects of sleep to the human body.
    • Baseball performance via the lens of anthropometric testing, fitness metrics, and statistics: a longitudinal cross-sectional study

      Papadakis, Zacharias; Padgett, Robert N.; Stamatis, Andreas; Karasch, Richard A. (Ovid Technologies (Wolters Kluwer Health), 2021-03)
      Background: Anthropometric testing (AT) and fitness metrics (FM) are contributing factors for success in sports. Limited evidence exists regarding longitudinal baseball AT or FM roles on baseball performance statistics (PS). AT, FM, and PS associations were examined for 5 yr to create a performance model. Methods: Eighty collegiate Division I players participated in this study. Height, mass, and body fat percentage (BF%) were selected as AT variables of interest. Grip strength (GS), one repetition maximum squat (1RMSQ), and vertical-jump height were selected for FM. Batting average percentage (AVG), slugging percentage (SLG), on-base percentage (OBP) baseball statistics were selected as offensive PS. Earned run average (ERA), batting average against percentage (B/ AVG), and strike-out per innings pitched for 9 innings (SO/IP)*9 were selected for defensive PS. Results: Offensive (r=−0.15, P<0.005; rs=−0.17, P<0.001) and defensive (r =−0.253, P<0.001; rs=−0.314, P<0.001) statistics correlated with BF%. Offensive (r =0.26, P<0.001; rs=0.43, P<0.001) and defensive (r =0.39, P <0.001) statistics correlated with GS. Offensive (r =0.26, P<0.001; rs=0.43, P <0.001) and defensive (r =0.27, P <0.001) statistics correlated with 1RMSQ. Offensive statistics AVG (R2=0.48) and SLG (R2=0.46) were explained by 1RMSQ. For defensive statistics, 1RMSQ was the best fit for (SO/IP)*9 (R2=0.43) and B/AVG (R2=0.52), and GS was the best fit for ERA (R2=0.39). Squat and time interaction for B/AVG was significant (P=0.04). Conclusions: Baseball PS are associated with 1RMSQ and GS. Time moderates the effect of squat training on B/AVG. Pitchers need to include squats to lower their B/AVG. Coaches may focus on improving such FM variables and consider the time effect on selected FM that may affect PS.
    • Forest pests and wood pellets: A literature review of the opportunities and risks in the United States’ northeastern forests

      Neidermeier, Alex; Danks, Cecilia; Coleman, Kimberly; Wallin, Kimberly (Elsevier BV, 2020-11)
      As interest in alternatives to fossil fuels increases, low quality timber may become more attractive as feedstock material for biomass energy. This low-quality timber, referred to here as salvage wood, can be used to manu- facture wood pellets, a densified biomass energy product which can be used for electricity and heating. The process of converting wood to pellets also results in total pest mortality in the final product, an important consideration given wood pellet’s international market and global concerns about phytosanitation, or the risk of pest spread. However, there is still potential to spread pests in the wood pellet supply chain. To better under- stand the potential benefits for forest health and the phytosanitary risks of the use of salvaged wood in the wood pellet supply chain, our study systematically reviews the literature published between 2000 and 2018, gleaning applicable considerations for the northeastern United States (US), a region already affected by the highest density of damaging forest pests in the country and an up-tick in wood pellet use. Our review focuses on three pest species likely to incur considerable change in northeastern US forests: emerald ash borer (Agrilus planipennis or EAB; an exotic, invasive species), hemlock woolly adelgid (Adelges tsugae Annand, or HWA; an exotic, invasive species), and southern pine beetle (Dendroctonus frontalis Zimmermann, or SPB, a native species). Our review finds that wood pellets are being recognized as phytosanitary in their final form and that the forest health opportunities for the use of salvaged wood exist are beginning to be acknowledged in the region. However, our results also indicate that the spread of pests is still possible in the feedstock pre-treatment supply chain, which have yet to be directly addressed in US-related scientific literature. Our review concludes that further research and action on the phytosanitary risks in the supply chain focus on individual pest species behavior during harvesting, on-site comminution of feedstock material, and local processing at facilities within USDA APHIS (United States Department of Agriculture Animal and Plant Health Inspection Service) quarantine zones for maximum mitigation. The results of these considerations can accrue benefits for forest health, mitigate the spread of forest pests, and support the use of an alternative energy to fossil fuels in a changing climate.
    • Bringing the Forest Home: Lessons Learned during the COVID-19 Pandemic about E-Planning in Community Forestry Contexts

      Beck, Samantha; Coleman, Kimberly; Tapper, J Ethan (Oxford University Press (OUP), 2021-09-11)
      This paper examines “e-planning,” or the use of computer-based systems to conduct planning and decision-making, in the context of community forest management. E-planning is growing in the field of environmental planning, as it promises greater equity in terms of public participation. However, a lack of scholarly work exists on the applicability for forest planning. During the COVID-19 pandemic, county foresters and other natural resource professionals in Vermont turned to e-planning when safety restrictions limited their ability to engage in face-to-face efforts. This provided an opportunity to collect empirical data about the potential for e-planning to support the public engagement process in the context of forest planning. We provide an overview of e-planning theory and examine data from Vermont to explore the promise of e-planning for forest management. We make recommendations about the applicability of e-planning in the context of forest planning, and highlight areas for future research to investigate.
    • Melange fabrics of the northern Appalachians

      Caine, Jonathan Saul (1991-05)
      Melange and phacoidal or scaly cleavage have been observed in both ancient and modern day accretionary tectonic environments throughout the world. This unique structural fabric reflects common structural elements from microscopic to macroscopic scales of observation and from one region to another. Structures include: distinct individual polyhedral phacoids, phacoidal shear-aparts, rootless dismembered bedlets of silt, isolated rootless near isoclinal fold noses, seams of preferentially oriented phyllosilicates that generally parallel the foliation, abundant pyrite that ranges in form from large globular masses to small euhedral framboids, and calcite present as foliation-parallel veins and as intergranular precipitates. The characteristic phacoid shape is defined by an anastomosing network of regularly intersecting curviplanar slip surfaces whose average orientation defines a macroscopic and microscopic foliation. In three dimensions these intersections form individual phacoidal forms. The relationship of these lensoid shapes to their internal geometry and the overall stress environment in which they form is the least understood aspect of this fabric. By comparing structural data from Taconic melange in western Newfoundland, Canada and eastern New York State insight into the nature of the fabric has been gained. Three primary analytical techniques were used to obtain data for this study: microstructural analysis of thin-sections, analysis of individual phacoid specimens, and manual dissection of large hand samples. Because of the friable nature of phacoidally cleaved material, a method of dissection was developed to measure structural data such as phacoidal surface orientations and associated slickenline orientations. Data collected from these techniques was analyzed using standard stereographic methods using the computer program Orient. In addition, a stress analysis of the foliation and lineation data was done. The results of these analyses suggest that the lensoid shape of individual phacoids is significant at all scales, similar structures are observed from one location to another, and from ancient to modern day tectonic environments. In addition, the presence of phacoidal cleavage in shales and shaly sediments can be used, along with other geologic parameters, as a genetic indicator of the accretionary environment. The distinct phacoidal shape ranges from highly euhedral polyhedrons with triclinic symmetry to subhedral faceted forms that are best described as elongated oblate ellipsoids. These shapes are interpreted to reflect the internal arrangement of seams of preferentially oriented phyllosilicate grains that have apparently undergone rotation, intergranular particulate flow, and possibly recrystallization in an environment of high shear stress, flattening, and progressive deformation. In addition, conjugate microfaulting along phacoidal surfaces that generally parallel the seams acts in concert with the above mechanisms to accommodate the deformation in the accretionary prism environment. The presence of abundant precipitates of pyrite and calcite are interpreted to reflect dewatering processes that are syntectonic to the development of the fabric in the accretionary environment. The results of the stress analysis has demonstrated that the fabric axes, as defined by individual phacoid axes which are generally symmetrical to the axes of the fabric as a whole, are symmetrical to the principal stress axes. Comparison of the geometric, and petrographic data with the stress analysis data confirms this relationship and places the maximum principal stress at a high angle to the average orientation of the dominant foliation. This further indicates that the fabric is the result of shortening symmetrical to the fabric. The state of strain in phacoidally cleaved shales remains ambiguous because of a lack of strain markers and because there is no prefabric frame of reference with which to evaluate it.
    • Rigid Flexibility: Seeing the Opportunities in “Failed” Qualitative Research

      CohenMiller, Anna S.; Schnackenberg, Heidi; Demers, Denise (SAGE Publications, 2020-10-19)
      This article highlights an experience of “failing” within a qualitative research study. Specifically, the authors speak to the failure of recruiting participants in conducting synchronous video and telephone interviews. Drawing from literature in business and examples from research method texts to demonstrate the cross-disciplinary concerns and insights of failure within one’s work, the authors discuss how failure can be reframed as opportunity through the lens of “rigid flexibility” and the innovative steps they implemented. Providing additional insight into the process of framing and reframing failure in research, the authors integrate poetic inquiry as a tool for reflection to highlight their process and suggested steps for new researchers. The authors argue that researchers can approach studies with the idea that failures in the planning and/or execution can lead to opportunities and new insights.
    • Further evidence of an association between maternal smoking during pregnancy and attention deficit hyperactivity disorder: Findings from a high-risk sample of siblings

      Milberger, Sharon; Biederman, Joseph; Faraone, Stephen V.; Jones, Janice (Informa UK Limited, 1998-09)
      The authors investigated the relationship between attentiondeficit/byperactivity disorder (ADHD) and cigarette smoking in siblings of ADHD and non-ADHD probands. They conducted a 4-year follow-up of siblings from ADHD and control-group families. In the siblings of ADHD probands, ADHD was associated with higher rates and earlier onset of cigarette smoking. There was also a significant positive association between cigarette smoking and conduct disorder, major depression, and drug abuse in the siblings, even after adjusting for confounding variables. Moreover, smoking was found to be familial among ADHD families but not control-group families. Our findings indicate that ADHD is a risk factor for early initiation of cigarette smoking in the high-risk siblings of ADHD probands