Genetic Diversity and Relationships of Tlingit Moieties

The Tlingit from Southeast Alaska belong to the Northwest Coast cultural tradition, which is defined by regionally shared sociocultural practices. A distinctive feature of Tlingit social organization is the matrilineal exogamous marriage system among clans from two opposite moieties: the Raven/Crow and Eagle/Wolf. Clan and moiety membership are determined by matrilineal descent, and previous genetic studies of Northwest Coast populations have shown that there is a relationship between clan membership and genetic variation of matrilines and patrilines. To further understand this association, mitochondrial DNA (mtDNA) sequences from the Tlingit (n=154) are examined. By comparing mtDNA with moiety membership information, we explore the impact of marriage traditions among the Tlingit with their observable genetic variation. At the genetic level, the results support cultural persistence of Tlingit maternal moiety identity despite the negative impacts of European colonization. Our study additionally illustrates the relevance of data derived from Tlingit oral traditions to test hypotheses about population history on the Northwest Coast

TsanA ntyqanA renqA tqwaA tyqaI tqoE

Originally produced by students in the Winter 2018 Language Revitalization course at Dartmouth College, taught by Hilaria Cruz, Neukom Postdoctoral Fellow in Linguistics and Anthropology.https://digitalcommons.dartmouth.edu/motherlanguage/1005/thumbnail.jp

Restoring What? And for Whom? Listening to Karuk Ecocultural Revitalization Practitioners and Uncovering Settler Logics in Ecological Restoration.

What does it mean to restore a landscape degraded by settler colonialism? How might a well intentionedprocess like ecological restoration end up causing harm from underlying settler colonial logics? This thesis explores these questions through interviews with nine Karuk ecocultural practitioners, and offers pathways forward for collaborative ecological restoration processes that support Indigenous ecocultural revitalization efforts and stand-up to destructive settler logics

OT Graduate Students’ Perceived Preparedness for Level II Fieldwork: Traditional, Nontraditional and Mixed Fieldwork I Experiences

This study explored the perceived level of preparedness of occupational therapy (OT) graduate students for entering Level II fieldwork after completing nontraditional, traditional, and mixed Level I fieldwork experiences. This mixed-methods exploratory study included an online 22-question survey that was delivered to Occupational Therapy Doctoral (OTD) and Master of Occupational Therapy (MOT) programs throughout the United States. Participants were selected through voluntary convenience response sampling. Students (N=145) self-reported their level of preparedness for Level II fieldwork experiences. The quantitative data collected in this study reflected a statistically significant difference between Level I fieldwork experience-related questions for the three groups, including traditional, nontraditional, and mixed traditional and nontraditional fieldwork experiences. More specifically, students that took traditional fieldwork experiences felt that traditional fieldwork positively contributed to their preparedness for Level II fieldwork compared to those who took nontraditional fieldwork or a mix of traditional and nontraditional fieldwork. The qualitative data, analyzed through thematic analysis, indicated that students felt a combination of nontraditional and traditional fieldwork provided the most significant benefit from Level I fieldwork experiences. Results suggest that most OT students preferred either a combination of nontraditional Level I fieldwork and traditional Level I fieldwork or solely traditional Level I fieldwork for increasing their perceived preparedness prior to starting Level II fieldwork. This study has implications for OTD and MOT fieldwork curriculum development and implications for addressing the needs of OT students to feel better prepared for Level II fieldwork

Photoinduced charge separation in Q1D heterojunction materials: Evidence for electron-hole pair separation in mixed-halide MXMX solids

Resonance Raman experiments on doped and photoexcited single crystals of mixed-halide $MX$ complexes ($M$=Pt; $X$=Cl,Br) clearly indicate charge separation: electron polarons preferentially locate on PtBr segments while hole polarons are trapped within PtCl segments. This polaron selectivity, potentially very useful for device applications, is demonstrated theoretically using a discrete, 3/4-filled, two-band, tight-binding, extended Peierls-Hubbard model. Strong hybridization of the PtCl and PtBr electronic bands is the driving force for separation.Comment: n LaTeX, figures available by mail from JTG ([email protected]

Social Sciences and climatic change

Few currently deny that extreme weather and climate change are among the most pressing problems of our times. For the past hundred years, the American Meteorological Society (AMS) has supported and fostered science focusing on meteorology and climatic change but only more recently has this effort included the social sciences (Demuth, Gruntfest, et al. 2007). In this chapter, we review some of the social science currently informing understandings of human interactions with all forms of climatic change including weather, hazards, and climate change, and/as well as their impacts and potential solutions.</p

Metrology and quality assurance from surveillance of gas compositions over PuO[sub 2]

Until the late 1980s, a primary mission of the Department of Energy (DOE) has been the production of nuclear materials for nuclear weapons. Termination of the Cold War in 1989 and the subsequent nuclear weapons treaties dramatically decreased the inventory needs for nuclear weapons. These activities resulted in the consolidation of nuclear material inventories and activities, generating substantial amounts of surplus nuclear materials ranging from plutonium metal and pure oxides to impure plutonium residues. Packaging and storage of these materials in physically and environmentally safe configurations for significant time periods were required. In 1993 the Defense Nuclear Facility Safety Board (DNFSB) and the DOE Office of Nuclear Safety examined the storage of metal and oxides at the Rocky Flats Plant that ultimately resulted in recommendation 94-1, calling for a standard to define the processing and storage of plutonium bearing materials. This recommendation generated a standard for storage of plutonium metals and oxides, DOE-STD-3013-2000, which is now in its fourth revision. The current DOE 3013 Standard is limited to metal and oxides, which contain greater than 30 weight percent plutonium and uranium. The 3013 Standard requires that the oxide be calcined to 950 C for two hours in an oxidizing environment. Before packaging, the oxide is required to have less than 0.5 weight percent moisture. Up to five kilograms of the stabilized oxide material is subsequently sealed in a set of two-nested welded stainless steel container, which must have a power less than 19 Watts

Pressure Tuning of the Charge Density Wave in the Halogen-Bridged Transition-Metal (MX) Solid Pt2Br6(NH3)4Pt_2Br_6(NH_3)_4

We report the pressure dependence up to 95 kbar of Raman active stretching modes in the quasi-one-dimensional MX chain solid $Pt_2Br_6(NH_3)_4$. The data indicate that a predicted pressure-induced insulator-to-metal transition does not occur, but are consistent with the solid undergoing either a three-dimensional structural distortion, or a transition from a charge-density wave to another broken-symmetry ground state. We show that such a transition cacan be well-modeled within a Peierls-Hubbard Hamiltonian. 1993 PACS: 71.30.+h, 71.45.Lr, 75.30.Fv, 78.30.-j, 81.40.VwComment: 4 pages, ReVTeX 3.0, figures available from the authors on request (Gary Kanner, [email protected]), to be published in Phys Rev B Rapid Commun, REVISION: minor typos corrected, LA-UR-94-246