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The influence of geomorphological site characteristics on soil clay mineral stability of montmorillonite-containing horizons of a southern Wisconsin soil catena was interpreted in terms of the solute activity function values of pSi(OH)4, pH-1/2pMg2+ and pH-1/3pAl3+ in suspensions of the separated clay fractions. Montmorillonite stability and/or formation vs that of kaolinite for the soil clays was evaluated by a plot of the solute activity functions on a three dimensional diagram derived for montmorillonite, kaolinite, and gibbsite at constant temperature (25°C) and constant pressure (one atm.). Although all the soil clays contained both montmorillonite and kaolinite, the position of the soil clay solute activity functions in the stability diagram clearly reflected the influence of the geomorphological—geochemical site conditions in which each soil horizon was developed, with corresponding differences in the SiO2/Al2O3 molar ratio of the reactive fraction. Montmorillonite stability positions of the solute activity functions were induced by soils (clays with reactive fractions with SiO2/Al2O3 molar ratios = 3–4) from calcareous or poorly drained horizons, while kaolinite stability positions of the functions were induced by soils (clays with reactive fractions of SiO2/Al2O3 molar ratios = 2) from acid, freely drained horizons.
A steady state reaction of apparent equilibrium of K mica + Ca2+ ⇄ Ca vermiculite + K+ was indicated by prolonged dissolution extractions from Blount soil clay (from northern Indiana) abundant in dioctahedral mica and vermiculite, with log Keq = 2.92 for the reaction when extrapolated to infinite time. From this and published free energies of formation of mica and kaolinite, a mineral phase stability diagram depicting the phase joins of Ca vermiculite, muscovite, and kaolinite was constructed with the solute activity functions pH-pK+, 2pH-pCa2+, and pSi(OH)4. These solute functions for 14-day reactions of calcareous (and dolomitic), poorly drained Harps soil (from central Iowa) fell near the calcite-dolomite-CO2-H2O phase join, suggesting equilibrium. These functions for Harps soil and the control minerals muscovite, biotite, and (or) vermiculite plus calcite were plotted on the mica-vermiculite stability diagram for various CO2 partial pressures. The points fell on the vermiculite-stable side of the mica-vermiculite plane at CO2 partial pressures of 0.15 and 0.20 atm (similar to soil air that would exist under frozen soil during winter and early spring; 2pH-pCa2+ ≃ 10.3). They fell on the muscovite-stable side of the muscovite-vermiculite plane at CO2 partial pressures of 0.0001 and 0.001 atm (similar to soil air under natural summer conditions; 2pH-pCa2+, 13.6 and 12.6, respectively) and therefore K+ (and 137Cs+ in rainfall) would be expected to be fixed.
The 2pH-pMg2+ values determined for Harps soil at the various CO2 partial pressures plotted either in the Mg montmorillonite stability field or on the Mg-montmorillonite-kaolinite phase join, in concordance with the abundance of montmorillonite and some kaolinite in the medium and fine clay fractions. The solute values for the nearby Clarion soil (upland, noncalcareous) plotted on the montmorillonite-kaolinite join, or with higher CO2 partial pressure, in the kaolinite stability area. The Gibbs free energy of formation (△Gf0) for a dioctahedral Ca vermiculite of −1303.7 kcal per 010 was determined from the Keq. The solute functions for the Blount soil showed kaolinite to be the thermodynamically stable phase with respect to dioctahedral mica and (or) vermiculite. The 14-day solute values for the Harps and upland Clarion soils were also on the kaolinite stability side of the kaolinite-vermiculite join. The kinetics of kaolinite formation in the upper midwestern U.S.A. are apparently slow on a scale of ~ 104 years.
This chapter examines employment social enterprises (ESEs), organizations that provide employment opportunities to individuals marginalized and excluded in the labor market. Employment social enterprises employ chronically unemployed and underemployed individuals, including formerly incarcerated individuals, immigrants, and opportunity youth. This chapter begins by exploring the history, evolution, and prevalence of ESEs. We then highlight two exemplar ESEs to illustrate the design and demonstrate the impact of these organizations. After examining community power and psychological empowerment within ESEs, we explore different models of ESEs and identify topics for future research.
Introduced in the context of developmental psychopathology by Cicchetti and Rogosh in the Journal, the current paper incorporates the principles of equifinality and multifinality to support the use of tiered models to prevent the development of emerging child psychopathology and promote school readiness in early childhood. We use the principles of equifinality and multifinality to describe the limitations of applying one intervention model to address all children presenting with different types of risk for early problem behavior. We then describe the potential benefits of applying a tiered model for having impacts at the population level and two initial applications of this approach during early childhood. The first of these tiered models, Smart Beginnings, integrates the use of two evidenced-based preventive interventions, Video Interaction Project, a universal parenting program, and Family Check-Up, a selective parenting program. Building on the strengths of Smart Beginnings, the second trial, The Pittsburgh Study includes Video Interaction Project and Family Check-Up, and other more and less-intensive programs to address the spectrum of challenges facing parents of young children. Findings from these two projects are discussed with their implications for developing tiered models to support children’s early development and mental health.
To compare how clinical researchers generate data-driven hypotheses with a visual interactive analytic tool (VIADS, a visual interactive analysis tool for filtering and summarizing large datasets coded with hierarchical terminologies) or other tools.
Methods:
We recruited clinical researchers and separated them into “experienced” and “inexperienced” groups. Participants were randomly assigned to a VIADS or control group within the groups. Each participant conducted a remote 2-hour study session for hypothesis generation with the same study facilitator on the same datasets by following a think-aloud protocol. Screen activities and audio were recorded, transcribed, coded, and analyzed. Hypotheses were evaluated by seven experts on their validity, significance, and feasibility. We conducted multilevel random effect modeling for statistical tests.
Results:
Eighteen participants generated 227 hypotheses, of which 147 (65%) were valid. The VIADS and control groups generated a similar number of hypotheses. The VIADS group took a significantly shorter time to generate one hypothesis (e.g., among inexperienced clinical researchers, 258 s versus 379 s, p = 0.046, power = 0.437, ICC = 0.15). The VIADS group received significantly lower ratings than the control group on feasibility and the combination rating of validity, significance, and feasibility.
Conclusion:
The role of VIADS in hypothesis generation seems inconclusive. The VIADS group took a significantly shorter time to generate each hypothesis. However, the combined validity, significance, and feasibility ratings of their hypotheses were significantly lower. Further characterization of hypotheses, including specifics on how they might be improved, could guide future tool development.
Most students in MD-PhD programs take a leave of absence from medical school to complete PhD training, which promotes a natural loss of clinical skills and knowledge and could negatively impact a student’s long-term clinical knowledge. To address this concern, clinical refresher courses in the final year of PhD training have traditionally been used; however, effectiveness of such courses versus a longitudinal clinical course spanning all PhD training years is unclear.
Methods:
The University of Alabama at Birmingham MD-PhD Program implemented a comprehensive continuing clinical education (CCE) course spanning PhD training years that features three course components: (1) clinical skills; (2) clinical knowledge; and (3) specialty exposure activities. To evaluate course effectiveness, data from an anonymous student survey completed at the end of each semester were analyzed.
Results:
Five hundred and ninety-seven surveys were completed by MD-PhD students from fall 2014 to 2022. Survey responses indicated that the majority of students found the course helpful to: maintain clinical skills and knowledge (544/597, 91% and 559/597, 94%; respectively), gain exposure to clinical specialties (568/597, 95%), and prepare them for responsibilities during clinical clerkships. During semesters following lockdowns from the COVID-19 pandemic, there were significant drops in students’ perceived preparedness.
Conclusions:
Positive student survey feedback and improved preparedness to return to clinic after development of the course suggests the CCE course is a useful approach to maintain clinical knowledge during research training.
The hawksbill sea turtle Eretmochelys imbricata is categorized as Critically Endangered on the IUCN Red List and its population has declined by over 80% in the last century. The Eastern Pacific population is one of the most threatened hawksbill populations globally. Western Mexico is the northern distribution limit for hawksbill sea turtles in the Eastern Pacific and recent research indicates that the Mexican Pacific portion of the population is a separate management unit because of the restricted movements of these turtles. Here we use the most complete database of sighting records in the north-west Pacific of Mexico to identify sites where hawksbill turtles are present. We also develop a conservation index to determine the conservation status of hawksbill turtle sites. Our results demonstrate the importance of this region for juveniles and the relevance of rocky reefs and mangrove estuaries as habitats for hawksbill turtles. We identified 52 sites with records of hawksbill turtles. Most of these sites (71%) are not protected; however, sites with high conservation value included islands and coastal sites along the Baja California peninsula that are established as marine protected areas. Reefs and mangrove estuaries relevant for hawksbill turtles are probably also significant fish nursery areas that are important for local fishing communities, creating opportunities for conservation strategies that combine science, local engagement and policy to benefit both local fishing communities and hawksbill sea turtle conservation.
Crops emit a variety of volatile organic compounds (VOCs) that serve as attractants or repellents for pests and their natural enemies. Crop rotations, off-farm chemical inputs, and mechanical and cultural tactics – collectively called cropping systems – alter soil nutrients, moisture content, and microbial communities, all of which have the potential to alter crop VOC emissions. Soil legacy effects of diversified cropping systems have been shown to enhance crop VOC emissions in greenhouse studies, but how they influence emissions under field conditions remains virtually unknown. To determine the effect of cropping systems on plant VOC emissions in the field, air samples were collected from the headspace of wheat (Triticum aestivum L. Judee) grown in simplified wheat-fallow rotations or diversified wheat-cover crop rotations where cover crops were terminated by grazing cattle. Across two growing seasons, wheat grown in rotation with fallow emitted greater amounts of Z-3-hexenyl acetate and β-ocimene, key attractants for wheat stem sawfly (Cephus cinctus Norton), a major pest of wheat. While overall VOC blends were relatively similar among cropping system during the first growing season, emissions varied substantially in the second year of this study where wheat grown in rotation with cover crops emitted substantially greater quantities of volatile compounds characteristic of abiotic stress. Below-average precipitation in the second growing season, in addition to reduced soil water content in cover crop rotations, suggests that cropping system effects on wheat VOCs may have been driven primarily by water availability, a major factor limiting crop growth in dryland agriculture. While the specific mechanisms driving changes in VOC emissions were not explicitly tested, this work shows that agricultural practices applied in one growing season can differentially influence crop VOC emissions in the next through soil legacy effects, illustrating additional avenues through which cropping systems may be leveraged to enhance pest management.
To properly contextualise the bioarchaeological evidence presented in the chapters that follow, this chapter addresses pertinent issues of terminology and reception. Beginning with a consideration of terminology, key terms that are commonly used in discussions of ancient identity, such as ‘disability’, ‘deformity’, ‘poverty’, ‘class’, ‘status’, ‘ethnicity’, ‘ancestry’ and ‘race’, are defined and situated in their original cultural contexts. The focus then shifts to the Greek reception of marginalised persons by surveying the literary and visual evidence for Greek attitudes towards disabled people, non-elite individuals of low socioeconomic status and non-Greeks.
DEFINITIONS
Many of the terms and concepts explored in this book are far from self-evident. It is tempting to think that the concept of disability would have an ancient meaning similar to our modern understanding, but they simply do not equate. Indeed, scholars question whether the Greeks even recognised disabled people as a distinct group or class. To address issues of terminology, the sections that follow present definitions for key terms that will be used throughout this study of social marginalisation, namely disability, deformity, poverty, class, status, ethnicity, ancestry and race. Each concept is discussed in detail and situated within its original Greek cultural context.
Defining disability in the ancient G reek world
Today, ‘disability’ is generally defined as ‘any condition of the body or mind (impairment) that makes it more difficult for the person with the condition to do certain activities (activity limitation) and interact with the world around them (participation restrictions)’. However, scholars are divided on the question of whether there was a word for ‘disability’ in the ancient Greek world and cannot agree on the corollary issue of whether the disabled were recognised as a distinct minor group. Some maintain that adunatos, which is often translated as ‘unable’, is the closest Greek equivalent to ‘disabled’. Walter Penrose supports this position through the assertion that those considered to be adunatoi were exempt from military service and given financial assistance in Athens (Lysias 24; Aristotle, Athenian Constitution 49.2; Penrose 2015).
The concept of disability is a cultural construct. By simple definition, ‘disability’ can describe any number of physical, mental or medical conditions that cause someone to be labelled as ‘different’ or ‘unfit’ by other members of their society. As a result, the notion of what is disabling can vary widely over time and across cultures (Roberts 2000: 46). For instance, rickets, which is caused by prolonged vitamin D deficiency, results in bowed legs, curvature of the spine and stunted growth. In the past, rickets was seen as a disabling condition because it would have impaired an individual's mobility and aptitude for physical labour. Today rickets is rare, but when it does occur, there are surgical and therapeutic interventions widely available to help restore mobility. Furthermore, the understanding of what constitutes a disability can even differ among groups within a culture. An apt illustration of this comes from Martha's Vineyard, an island off the coast of Massachusetts. Throughout most of the United States, deafness is (and has traditionally been) viewed as a disabling and socially isolating condition, but on Martha's Vineyard, congenital deafness was endemic for approximately 250 years (the last deaf resident died in the early 1950s; Groce 1985). There, the incidence of congenital deafness was thirty-five times more common than the national average, which prompted all residents – those who could hear as well as those who could not – to use sign language. The unique bilingual nature of the island created a situation in which communication barriers and social stigmas usually associated with deafness were non-existent, thus ensuring the complete social integration of those who, in other circumstances, would most likely have been considered disabled. Deafness, therefore, was not deemed to be a disability on the Vineyard. Indeed, when asked about the status of the deaf on the island, a woman who grew up in the early twentieth century candidly remarked ‘those people weren't handicapped. They were just deaf’ (Groce 1985: 5).
In order to better understand ancient Greek societal attitudes towards disabled people, this chapter reviews the bioarchaeological evidence of physical difference in the Late Archaic/Classical Greek world (ca. sixth to fifth/fourth centuries bce).
Matters related to ancestry and ethnicity are among the most complex and contested issues in archaeology. Ancestry and ethnicity are facets of social identity, and each person has multiple strands of social identities that influence or dictate their roles in society. These strands are often connected with age, gender, class, status, rank, profession and sexuality, among others, and they all function differently in social group contexts. Rank and gender, for instance, are often cited as the causes of division among social groups, whereas ethnicity and ancestry are more cohesive in nature and have the capacity to bring groups together and strengthen bonds (MacSweeney 2009). Although ancestry and ethnicity are commonly understood as immutable and rooted in biology, the reality is far more complicated. Genealogy, for example, can be fabricated, and ethnic affiliations can shift in response to sociopolitical stimuli such as conflict, violence and changing constellations of power. Ancestry and ethnicity are always defined in response to political systems, and like many other social identities, they are cultural constructs characterised by their dynamism, flexibility and selfdefinition (Smedley and Smedley 2005: 17; Derks and Roymans 2009b: 1–2).
Two prominent historical figures, Herodotus and Philip II, illustrate the complexity of ethnic identity. Herodotus was born in the 480s BCE in Halicarnassus (modern Bodrum, Turkey) in the geographical region of Caria. Historically, the people of Caria did not speak Greek – indeed, Homer describes the Carians fighting for Troy as barbarophonos, or ‘of incomprehensible speech’ (Iliad 2.867). However, it was in this land of non-Greeks, approximately 500 years prior to Herodotus’ birth, that the polis of Halicarnassus was founded by Doric-speaking Greeks. It did not remain a strictly Dorian city throughout its history, as there is strong evidence that a significant portion of the population identified as Ionian in the fifth century BCE when the city was a member of the Delian League. At this point, official documents from Halicarnassus were issued in Ionian, and Herodotus composed his Histories in Ionic Greek. So, the population of Halicarnassus was of heterogeneous Greek ethnicity. It is also safe to assume that Halicarnassus was home to people of non-Greek ancestry and ethnicity, as it would have been a zone of contact for Greeks, Carians and Persians (Cartledge 2002: 52–3; Herda 2013).
The past lives of millions of ordinary people seem almost completely hidden from us now. Recent historical periods may be rich in surviving material culture and written sources, but even so many people still seem to be missing from our histories. They are concealed from us in historical and archaeological writing, just as they were concealed from (or by?) their contemporaries, whose narratives failed to represent them (Turner and Young 2007: 297).
We know a great deal about the ancient Greeks. We know what they ate, how they worshipped and how they fought. We know the types of houses they lived in and what they were furnished with. We know their politics, their philosophies and their arts. Despite all of this, our understanding of ancient Greek culture remains incomplete. With few exceptions, our knowledge is shaped by the narratives of the extraordinary members of society – men of high status, privilege and power. From the works of Herodotus, an aristocrat from Halicarnassus, to Xenophon, the Athenian son of a wealthy equestrian family, our libraries are filled with the writings of the elite. These men, though accomplished in their own right, experienced life in a markedly different way from the multitudes of ordinary people with whom they shared a society and a culture.
Likewise, the material culture of the people located at the centre of society – those whose histories have defined sociocultural normality – tends to be studied more often than that of others. Partially this is an issue of preservation; for example, grand houses of stone survive better in the archaeological record than modest dwellings of wattle and daub. Nevertheless, the resulting effect is that those who exist outside of societal norms, who occupy the periphery rather than the centre, become marginal in both a social and a material sense (Turner and Young 2007: 298).
When applied to individuals and groups, ‘marginality’ or ‘social marginalisation’ references the social, economic, political and legal spheres where people who are disadvantaged struggle to gain access to resources, which leads them to be ignored, excluded or neglected (Gurung and Kollmair 2005: 10). Greek literary sources, for instance, suggest that marginalised individuals experienced social exclusion (Herodotus 7.231–2; Aristotle, Athenian Constitution 22; Plutarch, Aristeides 73–4 on ostracism; Bremmer 1983 on scapegoat rituals), legal discrimination (Demosthenes 57.3), criminalisation (Demosthenes 24.123; Forsdyke 2008), poverty (Lysias 24) and often premature death (Xenophon, Hellenica 1.7.35).
The archaeological reconstruction of marginalised populations is complicated by a number of significant factors. This study, which focused on the Greek mainland during the Late Archaic/Classical period, was primarily impeded by a lack of known skeletal assemblages dating to the time frame under consideration. Another serious challenge was the general ‘invisibility’ of burials belonging to marginalised persons, as the marginalised are generally absent from Greek cemeteries. Although the reasons for their invisibility are not entirely clear, this lacuna most likely stems from the widespread practice of burying the marginalised outside of common burial grounds. As a result, these non-normative burials are left undiscovered when cemeteries are excavated.
This study focused exclusively on marginalising factors that can be discerned from burial contexts, namely physical disability, low socioeconomic status and non-Greek ethnicity or ancestry. It was found that traditional methods used to identify these characteristics could be ambiguous. For instance, methods for detecting non-Greeks in funerary contexts have tended to focus on material culture and burial rituals, but these would not have detected non-Greeks buried in normative Greek fashion and would have misidentified Greeks who embraced en vogue non-Greek motifs or objects. Funerary monuments from Athens, for example, demonstrate that many non-Greeks chose to commemorate themselves in an Athenian manner, while some elite Athenians were opting for non-Greek motifs. Complexities such as these illustrate the greater need for the contextual analysis of burial assemblages and careful consideration of all forms of available evidence. It is also clear that previously studied skeletal material would benefit from re-examination, especially in the area of biomolecular studies. In particular, stable isotopic studies of carbon and nitrogen can reveal dietary patterns, and stable isotopes of strontium, oxygen, sulphur and lead can identify migrants and potential non-Greeks.
Though sparse, there is bioarchaeological evidence of marginalising factors in burial assemblages from the Greek mainland dating to the Late Archaic/ Classical period. There are very few examples of physical impairment that derive from a Late Archaic/Classical context in the Greek mainland. Although the paucity of evidence prevents a focused synchronic study of the social ramifications of physical difference, widening the scope and considering case studies from different time periods allows for a diachronic glimpse into the ways in which disabled people were treated over time in ancient Greek society.