The Role of Sculpture in Communicating Archaeology in Museums

In this article I discuss an innovative museum strategy that aims to create a more evocative and engaging visitor experience. I argue that the inclusion of contemporary art, and specifically sculpture in exhibition design, activates visitor agency, empowering the public to take part in interpreting the human past. I explore the unique sensory engagement sculpture provides and the important role this can play for the public presentation of archaeology. I also examine an existing project that has called upon sculpture as an interpretive resource at the National Museum of Scotland, discussing its impact on visitors and its contribution to the discipline. I conclude with a discussion of a selection of living sculptors including Rachel Whiteread and Antony Gormley whose work, I argue, signals exciting opportunities for future artist-curator collaboration. By considering both current examples and future possibilities, this article builds a case for sculpture as an important and dynamic tool for the public understanding of archaeology in museums

Photonic microstructures as laser mirrors

Deeply etched 1-D third-order Bragg reflectors have been used as mirrors for broad-area semiconductor lasers operating at 975-nm wavelength. From a threshold and efficiency analysis, we determine the mirror reflectivity to be approximately 95%. The design of the GaAs-based laser structure features three InGaAs quantum wells placed close (0.5 μm) to the surface in order to reduce the required etch depth and facilitate high-quality etching. Despite the shallow design and the proximity of the guided mode to the metal contact, the threshold current density (J_(th) = 220 A/cm^2 for infinite cavity length) and internal loss (α_i = 9±1 cm^(−1)) are very low

Investigating the Self-Efficacy Awareness of Black Female Technology Leaders

Black female technology leaders lack leadership opportunities, which affects their self-efficacy and is a crucial concern. Self-efficacy is based on the concept that an individual’s belief in what they can achieve influences their actions and how much effort they invest in the selected action. Self-persuasion can provide high or low self-satisfaction as a determinant for creating incentives for success or failure and converting thoughts and emotions to actions. Limited research has investigated the mindset, the thought patterns, and the self-belief undertaken by Black females in the world of technology. Despite limited amounts of research, data suggest that Black female leaders in technology develop self-belief, self-influence, and self-empowerment for self-sustainment to face and overcome the challenges placed before them in their occupational environment. With 10 Black female technology leaders from various parts of the United States, this qualitative study was conducted based on data from a demographic interview questionnaire. Using NVivo, the researcher analyzed (a) the experiences, successes, challenges, barriers, needs, and awareness of the participants and (b) the extent to which the participants articulated a connection between mental fortitude and the workplace environment. Each examination was aimed toward the individual’s self-belief, self-perception, and self-discernment of their conduct to identify transformative measures to remove disparities in the technology atmosphere. The data are organized into six encompassing themes (a) history of working women, (b) history of African American women in technology, (c) factors of leadership that demotivate hiring Black females, (d) barriers for Black females working in technology, (e) ways to promote self-efficacy and self-awareness, and (f) future leadership roles for Black females. This study provides crucial insight into the fundamental survival-to-thriving techniques Black female technology leaders associate with developing success within the workplace environment, where too many Black females did not find a pathway to high attainment. This research study was composed to showcase the lived experiences of Black female technology leaders who honed their self-belief expertise, moving beyond perceived and actual barriers to create an inner-winner strategy. The arduous journey of self-belief and self-awareness instills self-knowledge that makes the individual their most potent

High resolution radio study of the Pulsar Wind Nebula within the Supernova Remnant G0.9+0.1

We have conducted a radio study at 3.6, 6 and 20 cm using ATCA and VLA and reprocessed XMM-Newton and Chandra data of the pulsar wind nebula (PWN) in the supernova remnant (SNR) G0.9+0.1. The new observations revealed that the morphology and symmetry suggested by Chandra observations (torus and jet-like features) are basically preserved in the radio range in spite of the rich structure observed in the radio emission of this PWN, including several arcs, bright knots, extensions and filaments. The reprocessed X-ray images show for the first time that the X-ray plasma fills almost the same volume as the radio PWN. Notably the X-ray maximum does not coincide with the radio maximum and the neutron star candidate CXOU J174722.8-280915 lies within a small depression in the radio emission. From the new radio data we have refined the flux density estimates, obtaining S(PWN) ~ 1.57 Jy, almost constant between 3.6 and 20 cm. For the whole SNR (compact core and shell), a flux density S(at 20 cm)= 11.5 Jy was estimated. Based on the new and the existing 90 cm flux density estimates, we derived alpha(PWN)=-0.18+/-0.04 and alpha(shell)=-0.68+/- 0.07. From the combination of the radio data with X-ray data, a spectral break is found near nu ~ 2.4 x 10^(12) Hz. The total radio PWN luminosity is L(radio)=1.2 x 10^(35) erg s^(-1) when a distance of 8.5 kpc is adopted. By assuming equipartition between particle and magnetic energies, we estimate a nebular magnetic field B = 56 muG. The associated particle energy turns out to be U(part)=5 x 10^(47) erg and the magnetic energy U(mag)=2 x 10^(47) erg. Based on an empirical relation between X-ray luminosity and pulsar energy loss rate, and the comparison with the calculated total energy, a lower limit of 1100 yr is derived for the age of this PWN.Comment: 10 pages,8 figures, accepted for publication in A&A, June 13 200

Effects of No-Tillage Production Practices on Crop Yields as Influenced by Crop and Growing Environment Factors

This paper evaluated differences between yields of no-tillage compared to conventional or reduced tillage and their associated downside risk. Six crops were evaluated along with how those yields and risks differed by various environmental factors such geographic location, precipitation, soil type and how long the practice had been used.no-tillage, conservation, conventional tillage, downside-risk, yield, Agribusiness, Environmental Economics and Policy, Farm Management, Land Economics/Use, Production Economics, Risk and Uncertainty,

XMM-Newton and ESO observations of the two unidentified gamma-ray sources 3EG J0616-3310 and 3EG J1249-8330

The limited angular resolution of gamma-ray telescopes prevents a direct identification of the majority of sources detected so far. This is particularly true for the low latitude, probably galactic, ones only 10 % of which has been identified. Most counterparts of the identified low-latitude gamma-ray sources are Isolated Neutron Stars (INS), both radio-loud and radio-quiet (Geminga-like) objects, which are characterised by an extremely high value of the X-ray-to-optical flux ratio f_X/f_opt. Therefore, the systematic X-ray and optical coverage of low-latitude unidentified gamma-ray sources aiming at high f_X/f_opt sources seems one of the most promising ways to spot INS candidate counterparts. Since low latitude sources are heavily affected by the interstellar absorption at both X-ray and optical wavelengths, we have focussed on two middle-latitude, probably galactic, GRO/EGRET sources: 3EG J0616-3310 and 3EG J1249-8330. These two sources, which could belong to a local galactic population, have been selected owing to their relatively good positional accuracy, spectral shape and lack of candidate extragalactic radio counterparts. Here we report on X-ray observations of the two gamma-ray error boxes performed with XMM-Newton and on their optical follow-up carried on with the Wide Field Imager at the ESO/MPG 2.2m telescope. Less than half of the ~300 sources detected by the X-ray coverage have no optical counterparts. Among those, we have selected few interesting sources with f_X/f_opt > 100, which we consider promising INS candidates.Comment: 18 pages, 10 figures, 8 tables. Accepted for publication by Astronomy & Astrophysic

The Self-Designing High- Reliability Organization

Recent studies of large, formal organizations that perform complex, inherently hazardous, and highly technical task under conditions of tight coupling and severe time pressure have generally concluded that most will fail spectaculatory at some point, with attendant human and social const of great severity. The notion that accidents in these systems are normal, that is, to be expected given the coditions and risks of operations and risk of operation, appears to be as well grounded in experience as in theory