315 research outputs found
Unforeseen Consequences of Visual Literacy: Alternative Mechanisms for Creating a More Inclusive Environment
Acknowledging the commendable efforts of colleagues in articulating significant concepts and theoretical approaches to enhance visual literacy within the LIS field, this work critically examines the Visual Literacy (VL) Framework. The analysis calls for a more inclusive representation of diverse experiences, particularly those of individuals with disabilities. Drawing inspiration from the conceptualization of critique as care, the study emphasizes a collaborative approach to integrate social justice, equity, and inclusion principles better into LIS work. While recognizing the VL Framework\u27s value as a starting point, the study identifies gaps related to universal accessibility and challenges in the language used. The chapter emphasizes the need for practical guidance on implementing the VL Framework components in real-time. The chapter delves into the language used in discussing visual literacy, highlighting its potential perpetuation of exclusion. In the context of visual literacy pedagogy, the study poses reflective questions to promote inclusivity in higher education settings. Ethical considerations regarding material interactions and institutional access are also explored.https://medica-musc.researchcommons.org/faculty-books/1004/thumbnail.jp
Low frequencies sound insulation in dwellings.
Low frequency noise transmission between dwellings is an increasing problem due to home entertainment systems with enhanced bass responses. The problem is exacerbated since there are not presently available methods of measurement, rating and prediction appropriate for low frequency sound in rooms. A review of the classical theory of sound insulation and room acoustics has shown that both theories are not applicable. In fact, the sound insulation of party walls at low frequencies is strongly dependent on the modal characteristics of the sound fields of the two separated rooms, and of the party wall. Therefore methods originally developed for measurement conditions where the sound field was considered diffuse, may not be appropriate for room configurations with volumes smaller than 50m3 and for frequencies where sound wavelengths are large. An alternative approach is proposed using a Finite Element Method (FEM) to study the sound transmission between rooms. Its reliability depends on the definition of the model, which requires validating measurement. FEM therefore does not replace field or laboratory measurements, but provides complementary parametric surveys not easily obtainable by measurements.The method involves modelling the acoustic field of the two rooms as an Acoustic Finite Element model and the displacement field of the party wall as a Structural Finite Element model. The number of elements for each model was selected by comparing the numerical eigenfrequencies with theoretical values within an acceptable processing time and error. The simulation of a single room and of two coupled rooms, defined by linking the acoustic model with the structural model, were validated by comparing the predicted frequency response with measured response of a 1:4 scale model. The effect of three types of party wall edge condition on sound insulation was investigated: simply supported, clamped, and a combination of clamped and simply supported. It is shown that the frequency trends still can be explained in terms of the classical mechanisms. A thin masonry wall is likely to be mass controlled above 50Hz. A thick wall is stiffness controlled, below 100Hz. A clamped thin wall provides a lower sound insulation than a simply supported, whereas a clamped masonry wall provides greater sound level difference at low frequencies than a simply supported.The sound insulation of masonry walls are shown to be strongly dependent on the acoustical modal characteristics of the connected rooms and of the structural modal characteristics of the party wall. The sound pressure level difference displays a sequence of alternating maxima and minima about a trend, dictated by the properties of the party wall. The sound insulation is lower in equal room than in unequal rooms, whatever the edge conditions and smaller wall areas provide higher sound insulation than large areas. A correction factor is proposed as a function of room configuration and wall area and edge conditions. Attempts to quantify the factor were made using statistical and deterministic analyse, but further work is required
Evaluation of Psychoacoustic Sound Parameters for Sonification
Sonification designers have little theory or experimental evidence to guide the design of data-to-sound mappings. Many mappings use acoustic representations of data values which do not correspond with the listener's perception of how that data value should sound during sonification. This research evaluates data-to-sound mappings that are based on psychoacoustic sensations, in an attempt to move towards using data-to-sound mappings that are aligned with the listener's perception of the data value's auditory connotations. Multiple psychoacoustic parameters were evaluated over two experiments, which were designed in the context of a domain-specific problem - detecting the level of focus of an astronomical image through auditory display. Recommendations for designing sonification systems with psychoacoustic sound parameters are presented based on our results
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Turning Missteps into Stepping Stones: Personal and Professional Growth as an Early Career Academic Librarian
This panel discussion will focus on the challenges and failures we have experienced as new and semi-new academic librarians. The all too familiar trend in libraries has been to do more with less: requests for library services have increased yet our budgets, time, and supplies have all decreased. While institutions have devised creative ways to adapt to new difficulties, including adopting new staffing models, the situation remains the same: we have been hired to do one job but inevitably end up doing much more. How did we as new librarians deal with systemic issues? How has it impacted our professional development (or lack thereof)? What did we learn or feel we failed at while coming into our own in this field? Our discussion will focus on shifts in working patterns, professional development (and the privilege that comes with being able to participate), the impact of institutional culture on “library work,” and proposals for success and change from the failures we have experienced. We also acknowledge that this is a panel of predominantly white, female-identified persons, and so our conversations are deeply rooted in systems of privilege. We are not speaking to the experiences of every librarian (nor should we aim to try), and we will also signal-boost counterspaces existing within our profession. This panel discussion will not be a venting session, but rather it is our hope to refocus the conversation to our experiences in the field and some possible solutions. Finally, we will consider how we have maintained professional direction and focus while allowing our career experiences to shape and inform us
Extensional faulting on Tinos island, Aegean sea, Greece: How many detachments?
Zircon and apatite fission track (ZFT and AFT) and (U-Th)/He, 40Ar/39Ar hornblende, and U-Pb zircon ages from the granites of Tinos Island in the Aegean Sea, Greece, suggest, together with published ZFT data, that there are three extensional detachments on Tinos. The Tinos granites crosscut the Tinos detachment. Cooling of the granites was controlled by the Livadi detachment, which occurs structurally above the Tinos detachment. Our U-Pb zircon age is 14.6 ± 0.2 Ma and two 40Ar/39Ar hornblende ages are 14.4 ± 0.4 and 13.7 ± 0.4 Ma. ZFT and AFT ages go from 14.4 ± 1.2 to 12.2 ± 1.0 Ma and 12.8 ± 2.4 to 11.9 ± 2.0 Ma. (U-Th)/He ages are from 10.4 ± 0.2 to 9.9 ± 0.2 Ma (zircon) and 11.9 ± 0.5 to 10.0 ± 0.3 Ma (apatite). All ages decrease northeastward in the direction of hanging wall transport on the Livadi detachment and age-distance relationships yield a slip rate of 2.6 (+3.3 / −1.0) km Ma−1. This rate is smaller than a published slip rate of 6.5 km Ma−1 for the Vari detachment, which is another detachment structurally above the Tinos detachment. Because of the different rates and because published ZFT ages from the footwall of the Vari detachment are ∼10 Ma, we propose that the Vari detachment has to be distinguished from the older Livadi detachment. We discuss various models of how the extensional detachments may have evolved and prefer a scenario in which the Vari detachment cut down into the footwall of the Livadi detachment successively exhuming deeper structural units. The thermochronologic ages demonstrate the importance of quantitative data for constraining localization processes during extensional deformation
Thermochronology of the modern Indus River bedload: New insight into the controls on the marine stratigraphic record
The Indus River is the only major drainage in the western Himalaya and delivers a long geological record of continental erosion to the Arabian Sea, which may be deciphered and used to reconstruct orogenic growth if the modern bedload can be related to the mountains. In this study we collected thermochronologic data from river sediment collected near the modern delta. U-Pb ages of zircons spanning 3 Gyr show that only ∼5% of the eroding crust has been generated since India-Asia collision. The Greater Himalaya are the major source of zircons, with additional contributions from the Karakoram and Lesser Himalaya. The 39Ar/40Ar dating of muscovites gives ages that cluster between 10 and 25 Ma, differing from those recorded in the Bengal Fan. Biotite ages are generally younger, ranging 0–15 Ma. Modern average exhumation rates are estimated at ∼0.6 km/m.y. or less, and have slowed progressively since the early Miocene (∼20 Ma), although fission track (FT) dating of apatites may indicate a recent moderate acceleration in rates since the Pliocene (∼1.0 km/m.y.) driven by climate change. The 39Ar/40Ar and FT techniques emphasize the dominance of high topography in controlling the erosional flux to the ocean. Localized regions of tectonically driven, very rapid exhumation (e.g., Nanga Parbat, S. Karakoram metamorphic domes) do not dominate the erosional record
Letter to NLM about MeSH
A letter written to the National Library of Medicine addressing concerns regarding the problematic medical subject heading, Blacks , other problematic terms, and the process by which they are selected. The letter concludes with recommendations for improvement by the authors and endorsed by several hundred signatories. In total, the letter was signed by 726 library workers from around the world and sent by email to National Library of Medicine representatives on Friday, June 10th, 2022. In addition, it was also shared with the Medical Library Association which distributed it through their website under the op-ed, Open Letter to NLM Regarding MeSH Term Changes and later as an MLAConnect post titled, NLM Responds to Librarians’ Open Letter re: MeSH Term Changes
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