scholarly journals Forensic Engineering Analysis Of Dot Verses Non-Dot Helmet Performance As A Function Of Velocities Exceeding Standardized Testing As A Function Of Velocities Exceeding Standardized Testing

Author(s):  
Laura L. Liptai

Motorcyclists Suffer Serious Trauma More Often Than Automotive Occupants Tracing To Contact With Non-Yielding Road Surfaces And/Or Direct Impact From Other Vehicles. A Motorcycle Helmet Is The Principal Defense To Head Impact. If A Motorcycle Helmet Passes Dot, Department Of Transportation, Approval, What Performance Improvements Correlate? Dot And Non-Dot Helmets Were Tested To Determine Impact Performance At Velocities Exceeding Standardized Testing Velocities. Three Types Of Dot Approved And Three Types Of Non-Dot Approved Helmets Were Tested At Two Speeds Outside Of The Federal Testing Standards In The United States. The Analysis Was Performed Using An Inverted Pendulum Sub-System Experimental Device With A Hybrid-Iii Anthropometric Dummy Cranium And Neck. Results Quantify The Performance By Category, Model, And Experiment By Test Metric.

Author(s):  
Robert N. Anderson ◽  
Petersen James A.

The First Part Of This Presentation Is A Case Study Involving A Domestic Propane Gas System, Having A Buried Line Between The Supply Tank And The Residence. The Gas Line Was Pierced During A Landscaping Project. This Breach Was Undetected And Gas Leaked Underground; Migrating Towards The House Where It Entered Under The House. The Fugitive Gas Found A Source Of Ignition, Resulting In An Explosion And Death Of The Single Occupant. Odorant In The Gas Apparently Did Not Warn The Occupant. What Performance Improvements Correlate? Dot And Non-Dot Helmets Were Tested To Determine Impact Performance At Velocities Exceeding Standardized Testing Velocities. Three Types Of Dot Approved And Three Types Of Non-Dot Approved Helmets Were Tested At Two Speeds Outside Of The Federal Testing Standards In The United States. The Analysis Was Performed Using An Inverted Pendulum Sub-System Experimental Device With A Hybrid-Iii Anthropometric Dummy Cranium And Neck. Results Quantify The Performance By Category, Model, And Experiment By Test Metric.


2015 ◽  
Vol 2 (1) ◽  
pp. 13-23 ◽  
Author(s):  
Aaron S. Benjamin ◽  
Hal Pashler

Recent years have seen an increased push toward the standardization of education in the United States. At the federal level, both major national political parties have generally supported the institution of national guidelines known as Common Core—a curriculum developed by states and by philanthropic organizations. A key component of past and present educational reform measures has been standardization of tests. However, increased reliance upon tests has elicited criticism, limiting their popular acceptance and widespread adoption. Tests are not only useful for assessment purposes, however. The goal of this article is to review evidence from the recent literature in psychology that indicates that tests produce direct educational benefits for students. A reconsideration of how and how many tests are implemented based on these principles may help soften the focus on testing solely as a means of assessment and help promote wider recognition of the role of tests as potent instructional interventions.


2018 ◽  
Vol 56 (3) ◽  
pp. 822-867 ◽  
Author(s):  
Christopher P. Brown ◽  
Joanna Englehardt ◽  
David P. Barry ◽  
Da Hei Ku

Kindergarten in the United States has fundamentally changed. It is the new first grade where children are taught increased academic content and experience more standardized testing. There is much debate among education stakeholders about these changes, but such discussions are often siloed— making it difficult to know whether these changes reflect these stakeholders’ understandings of kindergarten specifically or public education in general. This explorative video-cued multivocal ethnographic study addressed this issue by examining how local, state, and national education stakeholders made sense of the changed kindergarten. Such findings provide insight into what it is they viewed driving these academic and instructional changes, what opportunities for further reform exist, and whether these stakeholders will work to support and/or alter such changes.


Author(s):  
Richard M. Ziernicki

This paper outlines the legal system in the United States, the different types of courts, the differences between criminal and civil law, and the role of forensic engineering experts involved in civil lawsuits. After providing a summary of relevant procedures employed by civil and criminal courts, the paper describes the basic principles and requirements for the selection and work of a forensic engineering expert in both the state and federal court system. This paper outlines the role and function of forensic experts (specifically forensic engineers), in the United States court system. It is not a treatise on the legal system but on the role of experts. The paper presents the requirements typically used in today’s legal system to qualify a forensic engineer as an expert witness and to accept his or her work and opinions. Furthermore, this paper discusses who can be an expert witness, the expert’s report, applicable standards, conducted research, engineering opinions, and final testimony in court — and how those elements fit into the legal system. Lastly, the paper describes the concept of spoliation of evidence.


Author(s):  
Richard Ziernicki ◽  
William H. Pierce

In the United States, approximately 35 children under the age of five years old drown each year after access-ing above-ground pools via pool ladders. Consumer Product Safety Commission (CPSC) data also shows that approximately 486 additional children sustain submersion-related injuries after accessing above-ground pools via pool ladders. In many cases, these events occurred during brief lapses of adult supervision. This paper fo-cuses on potential product defect issues related to child submersion accidents, including the role of user manuals, alternative designs, warnings, instructions, and child behavior testing. The authors examine the issues related to the investigation of above-ground swimming pool submersion accidents. In addition, procedures and steps are outlined that may be useful in analyzing whether the swimming pool is defective and unreasonably dangerous.


2018 ◽  
Vol 11 (27) ◽  
pp. 329-344
Author(s):  
Nadine Bonda

Beginning in 2009, and with the passage of the American Recovery and Reinvestment Act of 2009, school districts across the United States began to be held to higher standards and their progress publicly reported.  Student achievement began to be measured by standardized testing and great efforts were being made to reduce the achievement gap. This paper is based on a five-year study of teacher evaluation in two urban districts in Massachusetts where improving teacher practice was seen as an important factor in raising student achievement. This research studied efforts to address those teachers who were identified as underperforming and were supported through individual improvement plans.  This paper used a case study approach to show what the practices of a sampling of these teachers looked like, teachers’ reactions to being rated unsatisfactory, and teachers’ reactions to the improvement planning process.


2021 ◽  
Vol 103 (3) ◽  
pp. 48-53
Author(s):  
Paul Bruno ◽  
Dan Goldhaber

The COVID-19 pandemic heightened tensions around standardized testing policy and prompted the United States Department of Education to allow states to request waivers from federal standardized testing requirements. Paul Bruno and Dan Goldhaber describe the waivers that states requested and received, what they suggest about how state test results might be used for different purposes and by different people, and what uses of testing seem to be most salient to policy makers. They conclude with recommendations for policy makers about how to design testing policy that can both improve educational outcomes and maintain robust political support, objectives achieved at best imperfectly by existing testing policy.


2000 ◽  
Vol 21 (2) ◽  
pp. 290-296
Author(s):  
Evangeline Harris Stefanakis

Guadalupe Valdes and Richard Figueroa carefully and clearly craft an argument for why bilingualism and testing constitute a special case of bias that continues to have serious consequences for today's school-age minority population in the United States. This argument could not be more timely, given the drive in the United States for standards and a rising wave of state-mandated standardized testing programs for all students, including bilinguals. Perhaps a summary of this book should be on the desk of every educational leader and policymaker charged with the mandate of administering standardized tests to bilingual students and comparing their scores with those of monolingual groups for the purpose of special education and vocational placements.


Author(s):  
Mobashwir Khan ◽  
Anurag Komanduri ◽  
Kalin Pacheco ◽  
Cemal Ayvalik ◽  
Kimon Proussaloglou ◽  
...  

This paper describes the findings from the California Vehicle Inventory and Use Survey (CA-VIUS) which was administered between June 2016 and January 2018 and obtained data from a total of 11,118 fleets and 14,790 trucks. The surveys were segmented by registration, geography, vehicle type, and vehicle age, and the data collection effort exceeded sampling targets across almost all segments. The CA-VIUS is the largest statewide commercial vehicle data collection effort in the United States and will replace the 2002 National VIUS in transportation planning and emissions studies throughout California. Currently, the wealth of information provided by the survey is supporting the development of the California Statewide Freight Forecasting Model which is a fine-grained behavioral freight model. This model will allow California Department of Transportation and its partners to make more informed infrastructure and operational investment decisions. The CA-VIUS data will also be useful for researchers and practitioners hoping to understand the impacts and benefits of commercial vehicle movements on air quality, economic activity, safety, and vehicle usage. This paper documents key sampling and survey approaches, but mainly focuses on the key findings observed in the survey. This is a practical paper geared towards practitioners who are seeking to analyze a new VIUS survey and those who wish to implement one of their own.


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