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Consumer Spaces, Objects, and Bodies
Get PDFConsumer Spaces, Objects, and Bodies is an exploration of consumerism and a study of objects, delving into the different marketplaces and products designed to influence our behavior. Using methods of collecting and image making, I question the relationship to my own consumption and challenge how I am programmed to respond as a consumer
Testing for Spatial Correlation under a Complete Bipartite Network
Get PDFThis note shows that for a spatial regression with a weight matrix depicting a complete bipartite network, the Moran I test for zero spatial correlation is never rejected when the alternative is positive spatial correlation no matter how large the true value of the spatial correlation coefficient. In contrast, the null hypothesis of zero spatial correlation is always rejected (with probability one asymptotically) when the alternative is negative spatial correlation and the true value of the spatial correlation coefficient is near -1
Exploring the Impact of Lake Browning on the Production of Singlet Oxygen in Adirondack Surface Waters
No full textMany inland lakes in temperate and boreal regions, including those in the Adirondack region of New York, are experiencing browning due to increased terrestrial inputs of colored dissolved organic matter (DOM). This phenomenon results from watershed recovery following declines in atmospheric acid deposition and shifts in precipitation patterns. Close coupling of changes in dissolved organic carbon levels and DOM quality in Adirondack lakes has important implications for ecosystem services, ranging from aquatic food web functioning to drinking water production. However, comparatively little is known about the potential effects of lake browning on carbon cycling and contaminant attenuation driven by the photochemical production of reactive intermediates from DOM. To address this gap, I measured singlet oxygen production in 131 surface water samples collected from 38 drainage and seepage lakes in the Adirondack region over three sampling seasons. Furfuryl alcohol was applied as a chemical probe under simulated sunlight conditions to determine the apparent quantum yields of singlet oxygen, which were then paired with solar irradiance predicted by the Simple Model of the Atmospheric Radiative Transfer of Sunshine program to estimate the noontime steady-state concentrations of singlet oxygen in the epilimnion of Adirondack lakes on sampling dates. Overall, the apparent quantum yields of singlet oxygen for Adirondack lake water samples ranged from 0.3 to 5.3 × 10^-2 mol per mol-photons and were higher for samples from drainage lakes than from seepage lakes. The apparent quantum yields of singlet oxygen did not vary significantly across seasons at the observed scale despite spatial heterogeneity among individual lakes. The noontime, epilimnion-averaged steady-state concentrations of singlet oxygen in Adirondack lakes were estimated to range from 1.1 × 10^-15 to 3.6 × 10^-14 M, which were 11±6 times lower than those estimated for the near-surface layer. The noontime, epilimnion-averaged steady-state concentrations of singlet oxygen estimated for the fall-winter season were lower than those for the spring-summer and summer-fall seasons, although they did not differ between drainage and seepage lakes. The seasonal Mann-Kendall test confirmed statistically significant increases in DOC in most Adirondack lakes over the past 30 years (1992 – 2022), whereas generalized additive mixed modeling revealed that DOC trend directions were somewhat heterogeneous across lakes. The apparent quantum yields of singlet oxygen for samples from lakes with lower seasonal Theil-Sen’s slopes of DOC were higher than those from lakes experiencing higher rates in DOC increase; however, the noontime, epilimnion-averaged steady-state concentrations of singlet oxygen were lower in lakes featuring upward DOC trends compared to those estimated for lakes with stable or inconsistent DOC trend directions during the most recent decade (2012 – 2022). Overall, this work provided new insights into the spatiotemporal distribution of singlet oxygen production in Adirondack lakes and explored its relationship to long-term DOC trends, finding decreasing patterns of photoreactivity with increased DOC concentrations. This highlighted the need for continued research into the complex interplay between browning and photoreactivity in these and other similar surface water ecosystems, as it will impact the fate of organic contaminants, trace metals, and pathogens
Computational Approaches to Bilingualism in Spanish Education: a Database for Natural Science Students
Get PDFTerminographic resources in Spain, including databases, glossaries, and multilingual dictionaries created by Royal Academies and other organizations are generally designed for experts, rarely to young students. The Ministry of Education and Vocational Training aims to strengthen multilingual and technological skills by the end of Primary Education and promote open educational resources. However, there is a lack of linguistic infrastructure for students in bilingual (Spanish-English) subjects. This work compiles a corpus to analyze common terms in Natural Science, resulting in a database to meet the terminological needs of students aged six to twelve, proposed as a future reference for teachers and students in Primary Education
Indonesia’s Clove Exports in the Global Market: Trends, Forecasts, and Competitiveness
Get PDFIndonesia is one of the global market\u27s largest producers and exporters of cloves (Syzygium aromaticum). Analyzing the export trends and competitiveness of Indonesia’s cloves in the global market is crucial for addressing challenges and seizing opportunities in international trade. This study was conducted to analyze the export trends of Indonesia’s cloves in the global market, forecast their supply over the next 20 years with the Least Squares Method, and analyze the competitiveness of Indonesia’s cloves in the global market with the Export Product Dynamics (EPD) Approach. The results of the analyses showed that Indonesia\u27s clove exports have a quadratic trendline, indicating that the value and volume of Indonesia\u27s clove exports in the global market initially declined. However, this decline gradually lessened over time. After reaching its lowest point, the growth has increased annually, and it is forecasted to keep rising. The competitiveness of Indonesia\u27s clove exports from 2017 to 2021 was in the rising star quadrant. The change in position every five years indicates the difficulty of maintaining a strong and stable position in the international market, thus requiring comprehensive policies
