An examination of discourse concerned with PCB remediation in the Hudson River

Remediation of PCB contamination in the Hudson River is an issue hotly contested within local communities, the media, and between government agencies and corporate entities. In recent years, the EPA has decided to revisit their 1984 no-action decision for the Hudson River and in December 2000, issued a Feasibility Study recommending partial dredging of the 200 miles of the Hudson floor deemed a Superfund site. The EPA\u27s reevaluation of their 1984 decision has spurred an enormous amount of literature from corporate, non-profit volunteer, and government agencies. The rhetorical theory of social constructionism and the ethical theory of environmental pragmatism are used to analyze the often conflicting and contradictory governmental, corporate, and nonprofit discourse concerned with PCB remediation in the Hudson and to demonstrate both effective and ineffective examples of environmental rhetoric. The theories of social constructionism and environmental pragmatism have been found very useful in suggesting methods for constructing discourse as well as evaluating environmental rhetoric

Calcium and magnesium absorption and retention by growing goats offered diets with different calcium sources

Calcium addition is necessary in order to balance the high phosphorus concentrations that are characteristic of high-concentrate ruminant diets. However, calcium sources differ in their bioavailability. Our objective was to determine apparent calcium and magnesium absorption and retention in goats offered diets containing different sources of calcium. Spanish-Boer goats (n = 18; 19.6 ± 1.88 kg) were stratified by body weight (BW) and sex and randomized to dietary treatments consisting of Purina Antlermax 16 containing either calcium carbonate (CC), Calmin (CM) or Milk Cal (MC). Goats were adapted to a control, corn-based high-concentrate diet on pasture and then moved to individual 1.0 × 1.5-m pens with plastic coated expanded metal floors, and adjusted to their respective diets along with removal of hay from the diet over a 7-d period. Goats were then offered their respective diets at a total of 2% of BW in equal feedings at 8:30 AM and 5:00 PM for an additional 14-d adaption period to diet and facilities followed by a 7-d collection of total urine and feces. Data were analyzed using PROC MIXED of SAS. Calcium and magnesium intake were not different (P ≥ 0.12) among diets. Calcium and magnesium apparent absorption and retention (g/d and % of intake) were greatest (P \u3c 0.05) in goats offered CC and did not differ (P ≥ 0.20) between goats offered the CM and MC diets. Therefore, calcium and magnesium were more available for goats from the diet containing calcium carbonate compared with diets containing Calmin and Milk Cal

Clinical vignette: VIPoma as a cause of persistent diarrhea

A 48-year-old man originally presented with a 5-day history of watery, nonbloody diarrhea without recent travel or contact with ill people. His medical history was significant for a prolonged course of Clostridium difficile diarrhea 1 year earlier. On physical exam, he had orthostatic hypotension, dry mucous membranes, mild right lower quadrant tenderness to palpation, and hyperactive bowel sounds. Laboratory testing revealed a sodium level of 130 mEq/L, a potassium level of 1.7 mEq/L, a chloride level of 102 mEq/L, a bicarbonate level of 13 mEq/L, a blood urea nitrogen level of 43 mg/dL, a creatinine level of 1.6 mg/dL, and a calcium level of 11.4 mg/dL. Despite several liters of IV hydration and aggressive potassium repletion, he remained severely hypokalemic with a potassium level of 1.5 mEq/L. He was admitted to the medical ICU for further resuscitation. Stool testing was negative for C. difficile and other infectious organisms. The patient\u27s symptoms resolved before additional evaluation, and he was discharged with a presumed diagnosis of severe viral gastroenteritis. The patient returned 1 week later with recurrence of profuse diarrhea. His physical examination was notable for a blood pressure of 104/59 mm Hg (nonorthostatic) and a pulse of 106 beats/min, again with dry mucous membranes and mild tenderness to palpation of the right lower quadrant. Serum chemistry panel revealed a sodium level of 137 mEq/L, a potassium level of 2.3 mEq/L, a chloride level of 111 mEq/L, a bicarbonate level of 10 mEq/L, a blood urea nitrogen level of 38 mg/dL, a creatinine level of 2.3 mg/dL, and a calcium level of 10.4 mg/dL. Testing was again negative for an infectious source of diarrhea, and colonoscopy was not suggestive of inflammatory bowel disease. An abdominal CT revealed a 5-cm pancreatic tail mass. The patient was later found to have an elevated vasoactive intestinal peptide (VIP) level of 1,765 pg/mL (reference range, 0 to 60 pg/mL). Fecal osmolality was not obtained. The tumor was resected, and histology confirmed a neuroendocrine tumor

The L.E.A.D. Project: Leading educational achievement through dialogue 2010

The L.E.A.D. Project: Leading Educational Achievement Through Dialogue 2010 is the report of the research team from the University of Notre Dame Australia funded by the Australian Government Quality Teacher Program. It is a multi-site case study which gathered data on high performing secondary schools in the Catholic system of Western Australia The data was gathered from 9 secondary schools in the Catholic system. All Principals and Deputy Principals (Curriculum) were interviewed for the study. Focus groups of Heads of Learning were interviewed, in total 32 Heads of Learning participated. Focus groups of teachers were interviewed, in total 38 teachers participated in the interviews. Focus groups of recent past students were interviewed, in total 26 past students participated in the interviews. Focus groups of parents were interviewed, in total 28 parents participated. In addition a 21 item Likert scale survey was used to gather data from all teachers in the 9 schools in the study, a total of 447 teachers responded to the Likert scale (Appendix A)

Prospectus, February 28, 1990

https://spark.parkland.edu/prospectus_1990/1006/thumbnail.jp

Stability limits and tuning recommendation of the classical current control providing inertia support

The drastic increase in renewable energy sources in power grids has raised stability concerns. A particular concern exists in the ability of the converters to preserve frequency stability, due to their inherent lack of inertia provision. Grid forming converters have been presented as a solution to this issue, however the control structure for such converters is significantly different from the vector current control structures utilized by most installed control-converter systems. The classical current controller with a Phase Locked Loop (PLL) can be modified to provide inertia by including an additional control loop that injects active power in the case of a frequency event. This paper presents a detailed stability study, using a small signal model, and presents a set of controller tuning recommendations for the classical current controller with inertia emulation capability. The investigation found that the classical current and PLL tuning decreases the power that can be provided using the inertia emulation loop. Reducing the current loop time constant can allow for stable inertia emulation with classical vector current control

Improved earthquake response via simulation and integrated space- and ground-based technologies: the TREMOR proposal

Earthquakes occurring around the world each year cause thousands of deaths, millions of dollars in damage to infrastructure, and incalculable human suffering. In recent years, satellite technology has been a significant boon to response efforts following an earthquake and its after-effects by providing mobile communications between response teams and remote sensing of damaged areas to disaster management organizations. In 2007, an international team of students and professionals assembled during the International Space University’s Summer Session Program in Beijing, China to examine how satellite and ground-based technology could be better integrated to provide an optimised response in the event of an earthquake. The resulting Technology Resources for Earthquake MOnitoring and Response (TREMOR) proposal describes an integrative prototype response system that will implement mobile satellite communication hubs providing telephone and data links between response teams, onsite telemedicine consultation for emergency first-responders, and satellite navigation systems that will locate and track emergency vehicles and guide search-and-rescue crews. A prototype earthquake simulation system is also proposed, integrating historical data, earthquake precursor data, and local geomatics and infrastructure information to predict the damage that could occur in the event of an earthquake. The backbone of these proposals is a comprehensive education and training program to help individuals, communities and governments prepare in advance. The TREMOR team recommends the coordination of these efforts through a centralised, non-governmental organization

Prospectus, February 7, 1990

https://spark.parkland.edu/prospectus_1990/1003/thumbnail.jp

Prospectus, May 10, 1990

https://spark.parkland.edu/prospectus_1990/1014/thumbnail.jp