90 research outputs found
Creating, Connecting, and Communicating: A look at social support for postpartum women
The prevalence of postpartum depression underscores the critical need for support systems for new mothers. Virtual support groups, such as the Fourth Trimester Support Group described in this paper, represent a promising avenue for addressing these challenges and providing much-needed support. This article describes the formation, activities, and evaluation of an online support group that leverages technology to foster a sense of community for new mothers. Further, the details within the case study provide a basic model for starting a similar support group
Estimation of Two-Stage Ditch Excavation Volume Using LiDAR Data
Drainage ditches are a major pathway for sediment, nutrients, and pesticides to enter stream systems, which threaten environmental and human health. Unlike trapezoidal ditches, two-stage ditches have a vegetated bench that acts as a floodplain, which helps to prevent erosion and to increase the processing of nutrients to improve water quality. Converting a trapezoidal ditch to a two-stage ditch is expensive, due to the large volumes of soil that need to be excavated. Since ditch geometries vary significantly and surveying each potential site by hand would be time consuming and expensive, a tool based upon online Light Detection and Ranging (LiDAR) data would be useful to estimate the volume.
The excavation volume for two ditches was calculated using two methods: the LiDAR digital elevation model, gridded to 3 m resolution, and a ground survey using an RTK GPS unit. ArcGIS was used to create profiles of the trapezoidal streams. Hypothetical two-stage cross-sections were created by calculating the bankfull depth, based on the drainage area, and the width, using a three to one bench slope. OriginPro was used to find the difference between the area under the two-stage cross-section and the original trapezoidal cross-section.
The estimated volume differed between the two methods. While the LiDAR based volume of one ditch was within 16.9% of the RTK GPS based volume, the other ditch’s volumes varied by 22.5%. This suggests that using the LiDAR DEM may not provide sufficient accuracy for this estimate, although it could provide a rough cost estimate without time-consuming surveys
Agricultural Impacts of Climate Change in Indiana and Potential Adaptations
While all sectors of the economy can be impacted by climate variability and change, the agricultural sector is arguably the most tightly coupled to climate where changes in precipitation and temperature directly control plant growth and yield, as well as livestock production. This paper analyzes the direct and cascading effects of temperature, precipitation, and carbon dioxide (CO2) on agronomic and horticultural crops, and livestock production in Indiana through 2100. Due to increased frequency of drought and heat stress, models predict that the yield of contemporary corn and soybean varieties will decline by 8–21% relative to yield potential, without considering CO2 enhancement, which may offset soybean losses. These losses could be partially compensated by adaptation measures such as changes in cropping systems, planting date, crop genetics, soil health, and providing additional water through supplemental irrigation or drainage management. Changes in winter conditions will pose a threat to some perennial crops, including tree and fruit crops, while shifts in the USDA Hardiness Zone will expand the area suitable for some fruits. Heat stress poses a major challenge to livestock production, with decreased feed intake expected with temperatures exceeding 29 °C over 100 days per year by the end of the century. Overall, continued production of commodity crops, horticultural crops, and livestock in Indiana is expected to continue with adaptations in management practice, cultivar or species composition, or crop rotation
Indiana’s Agriculture in a Changing Climate: A Report from the Indiana Climate Change Impacts Assessment
Indiana has long been one of the nation’s leaders in agricultural productivity. Favorable temperatures and precipitation help Indiana farmers generate over $31 billion worth of sales per year, making the state 11th in total agricultural products sold.
Changes to the state’s climate over the coming decades, including increasing temperatures, changes in precipitation amounts and patterns, and rising levels of carbon dioxide (CO2) in the air will result in several direct and indirect impacts to the state’s agricultural industry.
This report from the Indiana Climate Change Impacts Assessment (IN CCIA) describes how projected changes in the state’s climate will affect the health of livestock and poultry, growing season conditions for crops, the types of crops that can be planted, soil health and water quality as well as weed, pest and disease pressure for agricultural production statewide
Preparation of iron(IV) nitridoferrate Ca<sub>4</sub>FeN<sub>4</sub> through azide-mediated oxidation under high-pressure conditions
Photochemische Betrachtungen zur Wirkung ultravioletter Strahlung auf die menschliche Haut
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