Embodied meaning in architectural experience

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1992.Includes bibliographical references (p. 125-129).This thesis is an investigation of the natural or bodily-based meaning of architecture, understood in terms of the inherent qualities and relationships that arise out of movement within built environment, and based in a contemporary understanding of the relationship between man and world. This work. attempts a fundamental grounding of discussions of architectural meaning, through the rigorous application of our ever expansive knowledge base onto the realities of building and basic human understanding. Taking from environmental and perceptual psychology, and the cognitive sciences, the intent is to evolve a dialectic between science and contemporary theory that can advance our knowledge for architecture. This investigation of embodied experience revolves around two primary focal points. First, the increasing emphasis on vision and abstract objectivity has limited the range of the meaningful, and has led to a focus on abstract, intellectual meaning; this work. Attempts to demonstrate the potential that an interactive and complementary juxtaposition of kinesthetic signification could have. Second, architecture's greatest potency arises when it is considered in terms of the experience of both space and time -- specifically movement and the relationships between spaces that result from this movement. The body may be seen as a "paradigmatic ruler," a measuring tool for spatial experience, which in fact measures the spatially implicit meaning in bodily experience. Thus, this thesis is about trying to resolve the difficult juxtaposition of the transcendent qualities of embodied meaning with issues of time and movement, in order to derive an architecture fundamentally grounded in the body. The thesis surveys a cross-section of research and theory loosely categorized into three realms: embodied understanding, embodied meaning in architecture, and aesthetic issues of time and movement. The intent is to give direction to possible theories of architecture grounded in embodiment. This consideration of embodied meaning does not attempt to suggest an alternative to conscious, culturally-based meaning, nor to perpetuate the mind body split; rather the intent is to offer another frame of emphasis within our consciousness, and indicate the possibilities of the interaction and integral relationship between the intellectual and embodied realms, in designing for the modern world. Thesis Supervisor:by J. Chris Evans.M.S

PWSHAP: a path-wise explanation model for targeted variables

Predictive black-box models can exhibit high-accuracy but their opaque nature hinders their uptake in safety-critical deployment environments. Explanation methods (XAI) can provide confidence for decision-making through increased transparency. However, existing XAI methods are not tailored towards models in sensitive domains where one predictor is of special interest, such as a treatment effect in a clinical model, or ethnicity in policy models. We introduce Path-Wise Shapley effects (PWSHAP), a framework for assessing the targeted effect of a binary (e.g. treatment) variable from a complex outcome model. Our approach augments the predictive model with a user-defined directed acyclic graph (DAG). The method then uses the graph alongside on-manifold Shapley values to identify effects along causal pathways whilst maintaining robustness to adversarial attacks. We establish error bounds for the identified path-wise Shapley effects and for Shapley values. We show PWSHAP can perform local bias and mediation analyses with faithfulness to the model. Further, if the targeted variable is randomised we can quantify local effect modification. We demonstrate the resolution, interpretability and true locality of our approach on examples and a real-world experiment

Peatland initiation and carbon accumulation in the Falkland Islands

The Falkland Islands in the South Atlantic Ocean contain extensive peatlands at the edge of their global climatic envelope, but the long-term carbon dynamics of these sites is poorly quantified. We present new data for ten sites, compile previously-published data and produce a new synthesis. Many peatlands in the Falkland Islands developed notably early, with a fifth of basal 14 C dates pre-Holocene. Falkland Islands peats have high ash content, high carbon content and high bulk density compared to global norms. In many sites carbon accumulation rates are extremely low, which may partly relate to low average rainfall, or to carbon loss through burning and aeolian processes. However, in coastal Tussac peatlands carbon accumulation can be extremely rapid. Our re-analysis of published data from Beauchene Island, the southernmost of the Falkland Islands, yields an exceptional long-term apparent carbon accumulation rate of 139 g C m −2 yr −1 , to our knowledge the highest recorded for any global peatland. This high accumulation might relate to the combination of a long growing-season and marine nutrient inputs. Given extensive coverage and carbon-dense peats the carbon stock of Falkland Islands peatlands is clearly considerable but robust quantification will require the development of a reliable peat map. Falkland Island peatlands challenge many standard assumptions and deserve more detailed study

Potential Aboriginal-Occupation-Induced Dune Activity, Elbow Sand Hills, Northern Great Plains, Canada

Geomorphological and archeological evidence indicates potential linkages between Plains aboriginal occupation and dune activity in the Elbow Sand Hills of southern Saskatchewan, Canada. Vegetation encroachment has rapidly outpaced migration of an active dune complex over the last 65 years. Optical ages of stabilized dune remnants indicate that dune activity predates Euro-Canadian settlement (ca. AD 1900). Early Euro-Canadian explorers observed local occupation and exploitation of the sand hills by aboriginal groups for herding and impounding bison. Mapping of archeological sites in relation to physiography reveals that sand dunes, in close proximity to permanent water resources, were preferred areas of occupation. Collectively, these results support the hypothesis that aboriginal occupation disturbance may have perpetuated dune activity in the Elbow Sand Hills until the late 19th century, and that Euro-Canadian settlement and land use emphasizing conservation may have encouraged recent stabilization. We propose that similar aboriginal occupation disturbances may have been responsible for perpetuating dune activity in other dune fields in the Great Plains. To this end, climatic variability should not be considered exclusive of other drivers of dune activity in semivegetated inland dune fields of the Great Plains

Detrital Nutrient Content and Leaf Species Differenitally Affect Growth and Nutritional Regulation of Detritivores

© 2018 The Authors Resource nutrient content and identity are common bottom–up controls on organismal growth and nutritional regulation. One framework to study these factors, ecological stoichiometry theory, predicts that elevated resource nitrogen (N) and phosphorus (P) contents enhance organism growth by alleviating constraints on N and P acquisition. However, the regulatory mechanisms underlying this response – including whether responses depend on resource identity – remain poorly understood. In this study, we tested roles of detrital N and P contents and identity (leaf species) in constraining growth of aquatic invertebrate detritivores. We synthesized results from seven detritivore species fed wide nutrient gradients of oak and maple detritus in the laboratory. Across detritivore taxa, we used a meta-analytic approach quantifying effects of detrital leaf species and N and P contents on growth, consumption, and N- and P-specific assimilation and growth efficiencies. Detritivore growth rates increased on higher-N and P detritus and on oak compared to maple detritus. Notably, the mechanisms of improved growth differed between the responses to detrital nutrients versus leaf species, with the former driven by greater consumption rates despite lower assimilation efficiencies on higher-nutrient detritus, and the latter driven by improved N and P assimilation and N growth efficiencies on oak detritus. These findings suggest animal nutrient acquisition changes flexibly in response to resource changes, altering the fate of detrital N and P throughout regulation. We affirm resource identity and nutrients as important bottom–up controls, but suggest these factors act through separate pathways to affect organism growth and thereby change detrital ecosystems under anthropogenic forest compositional change and nutrient enrichment

Evidence for renoxification in the tropical marine boundary layer

We present 2 years of NOx observations from the Cape Verde Atmospheric Observatory located in the tropical Atlantic boundary layer. We find that NOx mixing ratios peak around solar noon (at 20-30pptV depending on season), which is counter to box model simulations that show a midday minimum due to OH conversion of NO2 to HNO3. Production of NOx via decomposition of organic nitrogen species and the photolysis of HNO3 appear insufficient to provide the observed noontime maximum. A rapid photolysis of nitrate aerosol to produce HONO and NO2, however, is able to simulate the observed diurnal cycle. This would make it the dominant source of NOx at this remote marine boundary layer site, overturning the previous paradigm according to which the transport of organic nitrogen species, such as PAN, is the dominant source. We show that observed mixing ratios (November-December 2015) of HONO at Cape Verde (∼ 3.5pptV peak at solar noon) are consistent with this route for NOx production. Reactions between the nitrate radical and halogen hydroxides which have been postulated in the literature appear to improve the box model simulation of NOx. This rapid conversion of aerosol phase nitrate to NOx changes our perspective of the NOx cycling chemistry in the tropical marine boundary layer, suggesting a more chemically complex environment than previously thought

Hospital-based specialist palliative care compared with usual care for adults with advanced illness and their caregivers: a systematic review

Background Most deaths still take place in hospital; cost-effective commissioning of end-of-life resources is a priority. This review provides clarity on the effectiveness of hospital-based specialist palliative care. Objectives The objectives were to assess the effectiveness and cost-effectiveness of hospital-based specialist palliative care. Population Adult patients with advanced illnesses and their unpaid caregivers. Intervention Hospital-based specialist palliative care. Comparators Inpatient or outpatient hospital care without specialist palliative care input at the point of entry to the study, or community care or hospice care provided outside the hospital setting (usual care). Primary outcomes Patient health-related quality of life and symptom burden. Data sources Six databases (The Cochrane Library, MEDLINE, EMBASE, Cumulative Index to Nursing and Allied Health Literature, PsycINFO and CareSearch), clinical trial registers, reference lists and systematic reviews were searched to August 2019. Review methods Two independent reviewers screened, data extracted and assessed methodological quality. Meta-analysis was carried out using RevMan (The Cochrane Collaboration, The Nordic Cochrane Centre, Copenhagen, Denmark), with separate synthesis of qualitative data. Results Forty-two randomised controlled trials involving 7779 participants (6678 patients and 1101 unpaid caregivers) were included. Diagnoses of participants were as follows: cancer, 21 studies; non-cancer, 14 studies; and mixed cancer and non-cancer, seven studies. Hospital-based specialist palliative care was offered in the following models: ward based (one study), inpatient consult (10 studies), outpatient (six studies), hospital at home or hospital outreach (five studies) and multiple settings that included hospital (20 studies). Meta-analyses demonstrated significant improvement favouring hospital-based specialist palliative care over usual care in patient health-related quality of life (10 studies, standardised mean difference 0.26, 95% confidence interval 0.15 to 0.37; I 2 = 3%) and patient satisfaction with care (two studies, standardised mean difference 0.36, 95% confidence interval 0.14 to 0.57; I 2 = 0%), a significant reduction in patient symptom burden (six studies, standardised mean difference –0.26, 95% confidence interval –0.41 to –0.12; I 2 = 0%) and patient depression (eight studies, standardised mean difference –0.22, 95% confidence interval –0.34 to –0.10; I 2 = 0%), and a significant increase in the chances of patients dying in their preferred place (measured by number of patients with home death) (seven studies, odds ratio 1.63, 95% confidence interval 1.23 to 2.16; I 2 = 0%). There were non-significant improvements in pain (four studies, standardised mean difference –0.16, 95% confidence interval –0.33 to 0.01; I 2 = 0%) and patient anxiety (five studies, mean difference –0.63, 95% confidence interval –2.22 to 0.96; I 2 = 76%). Hospital-based specialist palliative care showed no evidence of causing serious harm. The evidence on mortality/survival and cost-effectiveness was inconclusive. Qualitative studies (10 studies, 322 participants) suggested that hospital-based specialist palliative care was beneficial as it ensured personalised and holistic care for patients and their families, while also fostering open communication, shared decision-making and respectful and compassionate care. Limitation In almost half of the included randomised controlled trials, there was palliative care involvement in the control group. Conclusions Hospital-based specialist palliative care may offer benefits for person-centred outcomes including health-related quality of life, symptom burden, patient depression and satisfaction with care, while also increasing the chances of patients dying in their preferred place (measured by home death) with little evidence of harm. Future work More studies are needed of populations with non-malignant diseases, different models of hospital-based specialist palliative care, and cost-effectiveness. Study registration This study is registered as PROSPERO CRD42017083205. Funding This project was funded by the National Institute for Health Research (NIHR) Health Services and Delivery Research programme and will be published in full in Health Services and Delivery Research; Vol. 9, No. 12. See the NIHR Journals Library website for further project information

Advanced Oxygen Recovery via Series-Bosch Technology

Oxygen recovery from metabolically-produced carbon dioxide (CO2) is of critical importance for long-duration manned space missions beyond low Earth orbit. On the International Space Station (ISS), oxygen is provided to the crew through electrolysis of water in the Oxygen Generation Assembly (OGA). Prior to 2011, this water was entirely resupplied from Earth. A CO2 Reduction Assembly based on the Sabatier reaction (1) was developed by Hamilton Sundstrand and delivered to ISS in 2010. The unit recovers oxygen by reducing metabolic CO2 with diatomic hydrogen (H2) to produce methane and product water. The water is cleaned by the Water Purification Assembly and recycled to the OGA for continued oxygen production. The methane product is vented overboard