Noise Contour Comparison of Stage 3 Hushkit Options for Boeing 727-200

Author(s):  
W. Evert Meyer ◽  
William J. Willkie

Because of the hushkitting of older Stage 2 aircraft such as the Boeing 727 to meet Part 36 Stage 3 requirements of Federal Aviation Regulations (FARs), up to 1,000 older and noisier aircraft may still be flying in the United States after December 31, 1999. Many noise studies with FAA’s Integrated Noise Model (INM) have predicted a significant decrease in the noise contours after this date, anticipating replacement of most Stage 2 aircraft with modern Stage 3 aircraft, such as Boeing 737-700 series, Boeing 757-200, and Airbus A320 series aircraft. The INM noise footprints of a Boeing 727-200 with the Federal Express Aviation Services Inc. (FedEx) and Raisbeck Stage 3 hushkit treatments were compared with that of an unmodified Boeing 727-200 as well as that of a Boeing 757-200, which is representative of a true new-technology Stage 3 aircraft. Although the FedEx and Raisbeck Stage 3 kits are extremely cost-effective solutions for achievement of Stage 3 compliance under FAR Part 36, the real benefits to the community are somewhat limited compared with those from an aircraft designed from the outset as a Stage 3 aircraft.

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Eko Wahyono ◽  
Rizka Amalia ◽  
Ikma Citra Ranteallo

This research further examines the video entitled “what is the truth about post-factual politics?” about the case in the United States related to Trump and in the UK related to Brexit. The phenomenon of Post truth/post factual also occurs in Indonesia as seen in the political struggle experienced by Ahok in the governor election (DKI Jakarta). Through Michel Foucault's approach to post truth with assertive logic, the mass media is constructed for the interested parties and ignores the real reality. The conclusion of this study indicates that new media was able to spread various discourses ranging from influencing the way of thoughts, behavior of society to the ideology adopted by a society.Keywords: Post factual, post truth, new media


1998 ◽  
Vol 9 (5) ◽  
pp. 549-568
Author(s):  
Noel D. Uri

The impact of energy on the adoption of conservation tillage is of special importance in addressing concerns about the effect of agricultural production on the environment in the United States. It is the subject of this paper. After establishing that a relationship exists between the price of energy and the adoption of conservation tillage via cointegration techniques, the relationship is quantified. It is shown that while the real price of crude oil, the proxy used for the price of energy, does not affect the rate of adoption of conservation tillage, it does impact the extent to which it is used. Finally, there is no structural instability in the relationship between the relative use of conservation tillage and the real price of crude oil over the period 1963 to 1997.


2015 ◽  
Vol 4 (6) ◽  
pp. 82 ◽  
Author(s):  
Julie M. Mhlaba ◽  
Emily W. Stockert ◽  
Martin Coronel ◽  
Alexander J. Langerman

Objective: Operating rooms (OR) generate a large portion of hospital revenue and waste. Consequently, improving efficiency and reducing waste is a high priority. Our objective was to quantify waste associated with opened but unused instruments from trays and to compare this with the cost of individually wrapping instruments.Methods: Data was collected from June to November of 2013 in a 550-bed hospital in the United States. We recorded the instrument usage of two commonly-used trays for ten cases each. The time to decontaminate and reassemble instrument trays and peel packs was measured, and the cost to reprocess one instrument was calculated.Results: Average utilization was 14% for the Plastic Soft Tissue Tray and 29% for the Major Laparotomy Tray. Of 98 instruments in the Plastics tray (n = 10), 0% was used in all cases observed and 59% were used in no observed cases. Of 110 instruments in the Major Tray (n = 10), 0% was used in all cases observed and 25% were used in no observed cases. Average cost to reprocess one instrument was $0.34-$0.47 in a tray and $0.81-$0.84 in a peel pack, or individually-wrapped instrument.Conclusions: We estimate that the cost of peel packing an instrument is roughly two times the cost of tray packing. Therefore, it becomes more cost effective from a processing standpoint to package an instrument in a peel pack when there is less than a 42%-56% probability of use depending on instrument type. This study demonstrates an opportunity for reorganization of instrument delivery that could result in a significant cost-savings and waste reduction.


ILR Review ◽  
2016 ◽  
Vol 70 (2) ◽  
pp. 519-551 ◽  
Author(s):  
Cory Koedel ◽  
P. Brett Xiang

The authors use data from workers in the largest public-sector occupation in the United States—teaching—to examine the effect of pension enhancements on employee retention. Specifically, they study a 1999 enhancement to the benefit formula for public school teachers in St. Louis, Missouri, that resulted in an immediate and dramatic increase in their incentives to remain in covered employment. To identify the effect of the enhancement on teacher retention, the analysis leverages the fact that the strength of the incentive increase varied across the workforce depending on how far teachers were from retirement eligibility when it was enacted. The results indicate that the St. Louis enhancement—which was structurally similar to enhancements that were enacted in other public pension plans across the United States in the late 1990s and early 2000s—was not a cost-effective way to increase employee retention.


2021 ◽  
Vol 21 (2) ◽  
pp. 252-264
Author(s):  
Nicholas Ross Smith ◽  
Ruairidh J. Brown

There is much pessimism as to the current state of Sino-American relations, especially since the onset of the COVID-19 pandemic in January 2020. Such pessimism has led to some scholars and commentators asserting that the Sino-American relationship is on the cusp of either a new Cold War or, even more alarmingly, something akin to the Peloponnesian War (via a Thucydides Trap) whereby the United States might take pre-emptive measures against China. This article rejects such analogizing and argues that, due to important technological advancements found at the intersection of the digital and fourth industrial revolutions, most of the real competition in the relationship is now occurring in cyberspace, especially with regards to the aim of asserting narratives of truth. Two key narrative battlegrounds that have raged since the onset of the COVID-19 pandemic are examined: where was the origin of the COVID-19 pandemic? and who has had the most successful response to the COVID-19 pandemic?. This article shows that Sino-American competition in cyberspace over asserting their narratives of truth (related to the COVID-19 pandemic) is fierce and unhinged. Part of what is driving this competition is the challenging domestic settings politicians and officials find themselves in both China and the United States, thus, the competing narratives being asserted by both sides are predominately for domestic audiences. However, given that cyberspace connects states with foreign publics more intimately, the international aspect of this competition is also important and could result in further damage to the already fragile Sino-American relationship. Yet, whether this competition will bleed into the real world is far from certain and, because of this, doomsaying via historical analogies should be avoided.


10.36469/9861 ◽  
2013 ◽  
Vol 1 (2) ◽  
pp. 134-150 ◽  
Author(s):  
J. Mark Stephens ◽  
Samuel Brotherton ◽  
Stephan C. Dunning ◽  
Larry C. Emerson ◽  
David T. Gilbertson ◽  
...  

Background: The costs of transporting end-stage renal disease (ESRD) patients to dialysis centers are high and growing rapidly. Research has suggested that substantial cost savings could be achieved if medically appropriate transport was made available and covered by Medicare. Objectives: To estimate US dialysis transportation costs from a purchaser’s perspective, and to estimate cost savings that could be achieved if less expensive means of transport were utilized. Methods: Costs were estimated using an actuarial model. Travel distance estimates were calculated using GIS software from patient ZIP codes and dialysis facility addresses. Cost and utilization estimates were derived from fee schedules, government reports, transportation websites and peer-reviewed literature. Results: The estimated annual cost of dialysis transportation in the United States is $3.0 billion, half of which is for ambulances. Most other costs are due to transport via ambulettes, wheelchair vans and taxis. Approximately 5% of costs incurred are for private vehicle or public transportation use. If ambulance use dropped to 1% of trips from the current 5%, costs could be reduced by one-third. Conclusions: Decision-makers should consider policies to reduce ambulance use, while providing appropriate levels of care.


2020 ◽  
Author(s):  
Anna Kaganiec-Kamieńska

Borders and Boundaries, Real and Symbolic: The Case of Puerto RicoThe aim of this article is to outline the real and symbolic borders and boundaries, of geographical, political, cultural and racial nature, in the history and present of Puerto Rico, and their role in shaping and transforming the Puerto Rican identity. The main part of the article focuses on the borders and boundaries between Puerto Rico and the United States. The second part looks at the lines dividing the population in the island and the Puerto Rican diaspora in the US. Granice rzeczywiste i symboliczne. Przypadek PortorykoCelem artykułu jest zarysowanie rzeczywistych i symbolicznych granic, geograficznych, politycznych, rasowych i kulturowych, wpisujących się w historię i współczesność Portoryko oraz ich roli w kształtowaniu się i przekształcaniu tożsamości portorykańskiej. Główna część artykułu skupia się na granicach biegnących między Portoryko a Stanami Zjednoczonymi. W drugiej części wskazano linie podziału powstałe między mieszkańcami wyspy a diasporą portorykańską w USA.


Revista Trace ◽  
2018 ◽  
pp. 62
Author(s):  
Patrick Pérez

En México, el “sueño americano” no deja de ser reciente, las expectativas del personal de cuidado de la salud en materia de movilidad dependen de la iniciativa individual. Los factores que determinan tanto la migración, como la admisión de los candidatos, son numerosos y difíciles de objetivar, debido a que se encuentran sedimentados por la historia y las complejas relaciones con Estados Unidos, que simbolizan la promesa de un “horizonte de movilidad abierto”, con referencia al cual se desprecian profundamente las condiciones de trabajo en el país de origen. Sin embargo, las condiciones reales de trabajo en Estados Unidos no son tan idílicas como los estudiantes gustan creerlo.Abstract: In Mexico, the “American dream” is still a topical issue. The expectations of the healthcare workers in terms of mobility depends on the individual initiative. The factors which determine migration, as well as the admission of candidates are numerous and uneasy to specify, given that they are frozen by history and complex relations with the United States, which symbolizes the promise of an “open mobility horizon”, in reference to the disregard of working conditions in their home country. However, the real working conditions in the United-States are not as idyllic as the students want to believe.Résumé : Au Mexique, le « rêve américain » n’en finit pas d’être d’actualité. Les perspectives du personnel de santé en matière de mobilité dépendent de l’initiative individuelle. Les facteurs déterminants de la migration, ainsi que de l’admission des candidats sont nombreux et difficiles à spécifier, puisqu’ils sont figés par l’histoire et les relations complexes avec les États-Unis, lesquels symbolisent la promesse d’un « horizon de mobilité ouvert », et font référence au mépris des conditions de travail dans le pays d’origine. Cependant, les conditions réelles de travail aux États-Unis ne sont pas aussi idylliques que les étudiants veulent le croire.


Environments ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 91
Author(s):  
Bruce Dvorak

It has been 30 years since, in the United States, the Pollution Prevention Act of 1990 focused attention on reducing pollution through cost-effective changes in production, operation, and raw materials use [...]


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