scholarly journals ANALYSIS OF GENERAL AVIATION FIXED-WING AIRCRAFT ACCIDENTS INVOLVING INFLIGHT LOSS OF CONTROL USING A STATE-BASED APPROACH

Aviation ◽  
2021 ◽  
Vol 25 (4) ◽  
pp. 283-294
Author(s):  
Neelakshi Majumdar ◽  
Karen Marais ◽  
Arjun Rao
Keyword(s):  
United States ◽  
The United States ◽  
The State ◽  
General Aviation ◽  
Transportation Safety ◽  
Loss Of Control ◽  
Coding System ◽  
Missing Information ◽  
Aircraft Accidents ◽  
Accident Data

Inflight loss of control (LOC-I) is a significant cause of General Aviation (GA) fixed-wing aircraft accidents. The United States National Transportation Safety Board’s database provides a rich source of accident data, but conventional analyses of the database yield limited insights to LOC-I. We investigate the causes of 5,726 LOC-I fixed‑wing GA aircraft accidents in the United States in 1999–2008 and 2009–2017 using a state-based modeling approach. The multi-year analysis helps discern changes in causation trends over the last two decades. Our analysis highlights LOC-I causes such as pilot actions and mechanical issues that were not discernible in previous research efforts. The logic rules in the state-based approach help infer missing information from the National Transportation Safety Board (NTSB) accident reports. We inferred that 4.84% (1999–2008) and 7.46% (2009–2017) of LOC-I accidents involved a preflight hazardous aircraft condition. We also inferred that 20.11% (1999–2008) and 19.59% (2009–2017) of LOC-I accidents happened because the aircraft hit an object or terrain. By removing redundant coding and identifying when codes are missing, the state-based approach potentially provides a more consistent way of coding accidents compared to the current coding system.

Is This the Care We Need?: An Examination of Childcare Policy in Pennsylvania

Commonwealth ◽  
2017 ◽  
Vol 19 (2) ◽  
Author(s):  
Jennie Sweet-Cushman ◽  
Ashley Harden
Keyword(s):  
United States ◽  
Child Care ◽  
Current System ◽  
The United States ◽  
The State ◽  
Federal State ◽  
Women And Politics ◽  
Richard Nixon ◽  
State And Local ◽  
Childcare Policy

For many families across Pennsylvania, child care is an ever-present concern. Since the 1970s, when Richard Nixon vetoed a national childcare program, child care has received little time in the policy spotlight. Instead, funding for child care in the United States now comes from a mixture of federal, state, and local programs that do not help all families. This article explores childcare options available to families in the state of Pennsylvania and highlights gaps in the current system. Specifically, we examine the state of child care available to families in the Commonwealth in terms of quality, accessibility, flexibility, and affordability. We also incorporate survey data from a nonrepresentative sample of registered Pennsylvania voters conducted by the Pennsylvania Center for Women and Politics. As these results support the need for improvements in the current childcare system, we discuss recommendations for the future.

Development of the Concepts for Providing Close Air Support

2020 ◽  
Vol 26 (1) ◽  
pp. 64-74
Author(s):  
Hristov Manush
Keyword(s):  
United States ◽  
Air Force ◽  
The United States ◽  
Second World War ◽  
The State ◽  
World War ◽  
Present Stage ◽  
Combat Experience ◽  
Second World

AbstractThe main objective of the study is to trace the perceptions of the task of an aviation component to provide direct aviation support to both ground and naval forces. Part of the study is devoted to tracing the combat experience gained during the assignment by the Bulgarian Air Force in the final combat operations against the Wehrmacht during the Second World War 1944-1945. The state of the conceptions at the present stage regarding the accomplishment of the task in conducting defensive and offensive battles and operations is also considered. Emphasis is also placed on the development of the perceptions of the task in the armies of the United States and Russia.

Studies of Islam, Economics, and Governance

1994 ◽  
Vol 11 (1) ◽  
pp. 38-70
Author(s):  
Florence Eid
Keyword(s):  
United States ◽  
Ford Foundation ◽  
The United States ◽  
The State ◽  
Edward Said ◽  
The Subject ◽  
State Of Research ◽  
Traditional Approaches ◽  
Islamic Values

IntroductionThis paper is a report on the state of research in two areas of Islamicstudies: Islam and economics and Islam and governance. I researched andwrote it as part of my internship at the Ford Foundation during the summerof 1992. On Discourse. The study of Islam in the United States has moved far beyondthe traditional historical and philological methods. This is perhapsbest explained by the development of analytically rigorous social sciencemethods that have contributed to a better balance between the humanisticconcerns of the more traditional approaches and efforts at systematizingthe study of Islam and classifying it across boundaries of communities,religions, even epochs. This is said to have s t a d with the developmentof irenic attitudes towards Islam, which changed the direction of westemorientalist writings from indifference (at best) and often open hostility toand contempt of Islamic values (however they were understood) to phenomenologicalworks by scholars who saw the study of Islam as somethingto be taken seriously and for its own sake, which is best exemplifiedby Clifford Geertz's Islam Observed.The work of Edward Said contested this evolution, and the publicationof his Orientalism has been described as "a stick of dynamite"' that,despite its impact in mobilizing a reevaluation of the field, was unwarrantedin its pessimism. In any case, the field has continued to evolve,with the most powerful force moving it being the subject itself. Thephenomenological/orientalist approach, if we can point to one today, ...

scholarly journals Monetizing the Burden of Childhood Asthma Due to Traffic Related Air Pollution in the Contiguous United States in 2010

2021 ◽  
Vol 18 (15) ◽  
pp. 7864
Author(s):  
Minaal Farrukh ◽  
Haneen Khreis
Keyword(s):  
United States ◽  
Air Pollution ◽  
Economic Impact ◽  
Childhood Asthma ◽  
Ambient Air ◽  
The United States ◽  
The State ◽  
Cost Calculation ◽  
Cost Burden ◽  
Incident Cases

Background: Traffic-related air pollution (TRAP) refers to the wide range of air pollutants emitted by traffic that are dispersed into the ambient air. Emerging evidence shows that TRAP can increase asthma incidence in children. Living with asthma can carry a huge financial burden for individuals and families due to direct and indirect medical expenses, which can include costs of hospitalization, medical visits, medication, missed school days, and loss of wages from missed workdays for caregivers. Objective: The objective of this paper is to estimate the economic impact of childhood asthma incident cases attributable to nitrogen dioxide (NO2), a common traffic-related air pollutant in urban areas, in the United States at the state level. Methods: We calculate the direct and indirect costs of childhood asthma incident cases attributable to NO2 using previously published burden of disease estimates and per person asthma cost estimates. By multiplying the per person indirect and direct costs for each state with the NO2-attributable asthma incident cases in each state, we were able to estimate the total cost of childhood asthma cases attributable to NO2 in the United States. Results: The cost calculation estimates the total direct and indirect annual cost of childhood asthma cases attributable to NO2 in the year 2010 to be $178,900,138.989 (95% CI: $101,019,728.20–$256,980,126.65). The state with the highest cost burden is California with $24,501,859.84 (95% CI: $10,020,182.62–$38,982,261.250), and the state with the lowest cost burden is Montana with $88,880.12 (95% CI: $33,491.06–$144,269.18). Conclusion: This study estimates the annual costs of childhood asthma incident cases attributable to NO2 and demonstrates the importance of conducting economic impacts studies of TRAP. It is important for policy-making institutions to focus on this problem by advocating and supporting more studies on TRAP’s impact on the national economy and health, including these economic impact estimates in the decision-making process, and devising mitigation strategies to reduce TRAP and the population’s exposure.

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