The local electronic structure of alpha-Li3N

New theoretical and experimental investigation of the occupied and unoccupied local electronic density of states (DOS) are reported for alpha-Li3N. Band structure and density functional theory calculations confirm the absence of covalent bonding character. However, real-space full-multiple-scattering (RSFMS) calculations of the occupied local DOS finds less extreme nominal valences than have previously been proposed. Nonresonant inelastic x-ray scattering (NRIXS), RSFMS calculations, and calculations based on the Bethe-Salpeter equation are used to characterize the unoccupied electronic final states local to both the Li and N sites. There is good agreement between experiment and theory. Throughout the Li 1s near-edge region, both experiment and theory find strong similarities in the s- and p-type components of the unoccupied local final density of states projected onto an orbital angular momentum basis (l-DOS). An unexpected, significant correspondence exists between the near-edge spectra for the Li 1s and N 1s initial states. We argue that both spectra are sampling essentially the same final density of states due to the combination of long core-hole lifetimes, long photoelectron lifetimes, and the fact that orbital angular momentum is the same for all relevant initial states. Such considerations may be generically applicable for low atomic number compounds.Comment: 34 pages, 7 figures, 1 tabl

‘Everyone should do it’: Client experience of a 12-week dialectical behaviour therapy group programme – An interpretative phenomenological analysis

Objective: There is a dearth of practice-based evidence of adapted or ‘DBTinformed’ transdiagnostic models, which could provide services and clinicians with information of what works and for whom, in which settings. This paper aims to bridge this gap by exploring the client experience of a 12-week transdiagnostic dialectical behaviour therapy (DBT) group programme in a private psychiatric hospital. Method: Five participants with varied clinical diagnoses and previous therapeutic experiences were interviewed following completion of one or more of the same adapted DBT programme, comprising of the standard four modules over 12 weeks, including a weekly skills group and 1:1 therapy. Interpretative phenomenological analysis (IPA) was applied to give voice to the clients’ lived experience of the group. Results: Three master themes were identified: ‘Pre DBT: Crisis & Desperation’; ‘In-session: Belonging’; and ‘The Real World: Living’, each characterised by four sub-themes, highlighting helpful and hindering factors of clients’ current and previous therapeutic experiences. Conclusion: Overall this version of DBT in a transdiagnostic setting was experienced as helpful and positive by participants; main outcomes included being able to build a life worth living, feel hope and joy, build DBT skills into a lifestyle, and develop reflective practice. Implications for clinical practice, service delivery and policy are also discussed. The article aims to provide clinicians with practice-based evidence to inform the delivery of DBT as well as supporting the case for the use of DBT with various disorders, thus paving the way for future research in this area

An Application of the SLEUTH Model: Future Urbanization of Davidson County, Tennessee

As the urban population is expected to grow in the coming decades, there is pressure on urban areas to expand to accommodate this growth. Often times, these expansions are not sustainable, they consume valuable lands and cause significant environmental, social, and economic burdens, a theory which is known as urban sprawl. Therefore it is often imperative to model areas more likely to urbanize in order for cities to plan for their expansion in the most sustainable way possible. Nashville, Tennessee located within Davidson County is an area that has been experiencing a significant period of urban growth. The objective of this case study is to model the urban expansion of Davidson County in Tennessee for the period of 2017-2040 using a cellular automata model known as the SLEUTH model. Historical imagery of slope, land use, excluded areas, transportation, and hillshade of Davidson County for 2001, 2006, 2011, and 2016 were collected and used to calibrate the SLEUTH model to simulate urban growth for the period of 2017-2040. The urban area for 2016 was 119.81 mi2 and from the SLEUTH model is said to increase to 121.90 mi2 for 2040. The urbanization rate during the historical time period (2001-2016) is 11.11% but the SLEUTH model predicts a much slower urbanization rate during the simulated time period (2017-2040) of 1.59%. This study shows how beneficial the SLEUTH model can be in modeling future urban growth but highlights a need to model more accurately development within intra urban areas as well as vertical urbanization within already densely urban regions

Lymphangitic Retroperitoneal Carcinomatosis Occurring From Metastatic Sarcomatoid Chromophobe Renal Cell Carcinoma

AbstractA 45-year-old man with left renal mass underwent nephrectomy to reveal a 20-cm tumor diagnosed as sarcomatoid chromophobe renal cell carcinoma. Lymph node metastasis of chromophobe and sarcomatoid components, disseminated tumor in retroperitoneal fat, lymphatic vessels, and perirenal adipose tissue in lymphangitic carcinomatosis pattern were identified. Chromophobe epithelial cells were positive for epithelial membrane antigen, c-Kit, and cytokeratin 7; sarcomatoid cells were positive for CD10 and smooth muscle antigen with high proliferation index. Chromophobe epithelial cells had loss of heterozygosity in chromosomes 1p and 1q, whereas sarcomatoid cells had loss of heterozygosity in 3p, 1p, and 1q. In conclusion, sarcomatoid chromophobe renal cell carcinoma has aggressive biologic behavior and potential to metastasize in unusual patterns

Bench-scale synthesis of nanoscale materials

A novel flow-through hydrothermal method used to synthesize nanoscale powders is introduced by Pacific Northwest Laboratory. The process, Rapid Thermal Decomposition of precursors in Solution (RTDS), uniquely combines high-pressure and high-temperature conditions to rapidly form nanoscale particles. The RTDS process was initially demonstrated on a laboratory scale and was subsequently scaled up to accommodate production rates attractive to industry. The process is able to produce a wide variety of metal oxides and oxyhydroxides. The powders are characterized by scanning and transmission electron microscopic methods, surface-area measurements, and x-ray diffraction. Typical crystallite sizes are less than 20 nanometers, with BET surface areas ranging from 100 to 400 sq m/g. A description of the RTDS process is presented along with powder characterization results. In addition, data on the sintering of nanoscale ZrO2 produced by RTDS are included