scholarly journals Forensic Engineering Investigation Of Pyrites Expansive Forces And Impact On Long-Term Building Failure

2008 ◽  
Vol 25 (2) ◽  
Author(s):  
Paul G. Carr
Keyword(s):  
Engineering Geology ◽  
Geotechnical Engineering ◽  
Pyrite Oxidation ◽  
Foundation Design ◽  
Highway Engineering ◽  
Forensic Engineering ◽  
Engineering Investigation

There Is A Dearth Of Information Available In The Literature And Published Engineering Texts Addressing The Impacts Of Pyrite Expansion In Buildings (Mitchell And Soga 2005). The Texts Have Largely Been Silent, And The Intersection Of Engineering Geology, Geotechnical Engineering And Foundation Design Has Been Lacking, With The Exception Of Limited Investigations Related To Highway Engineering. Typically Pyrite Has Been Associated With Shale Materials When Used As Fill. Granite, As Well As Other Rocks And Soil Can Also Contain Sufficient Pyrite To Initiate The Destructive Forces Associated With Pyrite Oxidation. In This Case Study Paper, The Insidious And Destructive Forces Of Pyrite Expansion Are Presented. The Long-Term Implications And Strategies For Remediation Are Considered.

scholarly journals Forensic Engineering Investigation Of A Cruise Ship Fire

2001 ◽  
Vol 18 (2) ◽  
Author(s):  
Thomas P. Shefchick
Keyword(s):  
Carbon Dioxide ◽  
Insurance Companies ◽  
Cruise Ship ◽  
Financial Loss ◽  
Engine Room ◽  
Fire Insurance ◽  
Room Fires ◽  
Forensic Engineering ◽  
Engineering Investigation

Each Year There Are Approximately 50 Major Fires Aboard Ships, Which Result In Financial Loss, Personal Injury And Death. Financial Loss At Sea Instigated The Formation Of Insurance Companies Such As Lloyds Of London, Which Now Provide Fire Insurance For Most Assets. Over A Nine-Year Period From 1977 To 1986, The Liverpool Underwriters Association Reported That 33 Percent Of The Fires Originated In Machinery Spaces, 3.6 Percent Originated In Electrical Installations And 0.5 Percent Originated In Stores. Between 1991 And 1993, 54 Percent Of The Fires Originated In Engine Rooms. The Engine Room Fires Were Often Initiated By An Explosion Or The Result From An Uncontrolled Release Of Flammable Vapors Or Fuel Into The Engine Room. 40 Percent Of All Fires In Engine Rooms Are Extinguished Using Portable Appliances While 18 Percent Are Extinguished By Fixed Carbon Dioxide Systems. Portable Appliances Are Most Effective In The First 15 Minutes And Carbon Dioxide In The First 30 Minutes...A Case Study Of The Investigation Of A Fatal Passenger Cruise Ship Fire Will Be Utilized To Show How The Burn Patterns Differ, How To Determine A Fires Area Of Origin And Possible Causes Of The Fire.

scholarly journals Forensic Engineering Analysis of Projectile Thrown from Phantom Vehicle

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Richard Ziernicki ◽  
William Pierce ◽  
Angelos Leiloglou
Keyword(s):  
Lead Author ◽  
Dump Truck ◽  
Engineering Analysis ◽  
High Definition ◽  
Probable Source ◽  
Forensic Engineering ◽  
Testing Case ◽  
Engineering Investigation

This paper presents a case study involving an 8-lb “projectile” piece of concrete thrown from a phantom vehicle into the windshield of a semi-tractor truck, subsequently striking the driver’s (plaintiff’s) head. A witness told the investigating officer that the phantom vehicle was a white-rear dump truck similar to the trucks he’d seen coming in and out of a construction entrance at a nearby park. However, no follow-up investigation was conducted by investigative officers. The lead author was retained by the plaintiff’s attorney to follow up and investigate the witness’ observation of the phantom white-rear dump truck in an attempt to identify the probable source of the concrete projectile, locate the phantom vehicle, reconstruct the incident, and determine the probable cause of the incident. Several forensic engineering techniques were used during the forensic engineering investigation, including evidence analysis, photography, high-definition scanning, photogrammetry, evaluation of the accident timeline, physical testing, case study analysis, projectile analysis, and application of the process of elimination methodology. Through the forensic engineering analysis, the probable source of the projectile concrete was identified, the white-rear dump truck and driver were identified, the accident was reconstructed, and the probable cause of the accident was determined.

scholarly journals Comparison Between Two Methods for Estimating the Vertical Scale of Fluctuation for Modeling Random Geotechnical Problems

2015 ◽  
Vol 37 (4) ◽  
pp. 95-103 ◽  
Author(s):  
Joanna M. Pieczyńska-Kozłowska
Keyword(s):  
Geotechnical Engineering ◽  
Soil Parameters ◽  
Penetration Test ◽  
Cone Penetration ◽  
Vertical Scale ◽  
Scale Of Fluctuation ◽  
A Site ◽  
Geotechnical Problems

Abstract The design process in geotechnical engineering requires the most accurate mapping of soil. The difficulty lies in the spatial variability of soil parameters, which has been a site of investigation of many researches for many years. This study analyses the soil-modeling problem by suggesting two effective methods of acquiring information for modeling that consists of variability from cone penetration test (CPT). The first method has been used in geotechnical engineering, but the second one has not been associated with geotechnics so far. Both methods are applied to a case study in which the parameters of changes are estimated. The knowledge of the variability of parameters allows in a long term more effective estimation, for example, bearing capacity probability of failure.

scholarly journals Forensic Engineering Testing And Analysis Of The Fatigue Failure Of A Hose Clamp

2004 ◽  
Vol 21 (1) ◽  
Author(s):  
Harold Josephs
Keyword(s):  
Fatigue Failure ◽  
Failure Modes ◽  
Fatigue Loading ◽  
Apparent Lack ◽  
Forensic Engineering ◽  
Service Conditions ◽  
Hose Clamp ◽  
Worm Drive

Worm-Drive Band Clamps Or Hose Clamps Are Used Commonly Throughout Industry, Such As In Automotive Applications, To Provide A Reliable Seal Against Liquid Leakage Between A Flexible Hose And A Rigid Male Receiver. The Band Clamp Reliability Is Seldom Questioned And The Typical Engineering Concern Is With The Seal Quality Only. However The Current Investigation Shows That Fatigue Failure Modes Can Develop Under Normal And Foreseeable Conditions Of Use That Will Render A Band Clamp Defective. A Fatigue Failure Of A Band Clamp Would At First Seem Remote And Justifiably Neglected By The Design Engineer Due To The Apparent Lack Of High Cyclic Loads. However Analysis Of A Failed Band Clamp Utilized To Secure A Hose Between An Automotive Radiator And Water Pump Together With Testing For Maximum Strain In An Exemplar Band Clamp-Hose System Has Demonstrated That Fatigue Should Be Considered As Part Of The Initial Design Criteria. The High Clamping Load Capability Of The Band Clamp Together With Low Cyclic Variation In The Load Due To Road And Engine Vibrations Can Indeed Lead To A Fatigue Failure Of The Metal Band. The Fatigue Induced Band Clamp Failure In The Case Study Presented Plus The Testing And Analysis Performed On The Exemplar Clamp, Suggest That Long Term Reliability Of Band Clamps Subjected To Severe Service Conditions May Be Compromised Due To Fatigue Loading.

scholarly journals Forensic Engineering Investigation Of Distressed Residential Foundations From Plumbing Leaks

2007 ◽  
Vol 24 (1) ◽  
Author(s):  
Toshi Nobe
Keyword(s):  
Clay Soil ◽  
Expansive Soils ◽  
Expansive Soil ◽  
Economic Loss ◽  
Insurance Companies ◽  
Foundation Design ◽  
Swelling Soils ◽  
Insurance Agent ◽  
Forensic Engineering ◽  
Engineering Investigation

The Distress To A Home Caused By A Plumbing Leak Under A Residential Foundation In Expansive Soils Can Be A Great Risk To Homeowners And Insurance Companies. It Was Estimated That Annual Damages In 1983 Due To Shrinking And Swelling Soils Averaged $9 Billion Nationwide, Causing Staggering Economic Loss.1 A Property Claim Resulting From A Purported Underground Plumbing Leak Affecting Moisture Content In Expansive Soils May Involve A Number Of Interested Parties Including: Homeowners, An Insurance Agent, An Insurance Claims Adjuster, A Plumbing Contractor, A Forensic Engineering Investigator, A Public Adjuster, A Foundation Contractor, A Foundation Design Engineer, And Attorneys... This Paper Describes A Step-By-Step Protocol For A Typical Residential Foundation Investigation That May Involve A Potential Legal Challenge As The Result Of The Investigatory Findings As Schematically Shown In Figures 1 And 2. This Paper Discusses The Areas Of Contention Based On Current Technology Involving Expansive Soil Foundations. Expansive Soils Are Clay Soils That Swell Volumetrically When The Soils Are Exposed To Moist Conditions.3 Clay Soil Shrinks When It Dries; Those Soils That Shrink And Swell To Extremes Are Known As Expansive Soils.

Caregivers' Perceptions of Speech-Language Pathologist Talk About Child Language and Literacy Disorders

2020 ◽  
Vol 29 (4) ◽  
pp. 2049-2067
Author(s):  
Karmen L. Porter ◽  
Janna B. Oetting ◽  
Loretta Pecchioni
Keyword(s):  
Language And Literacy ◽  
Collective Case Study ◽  
Study Approach ◽  
School Aged Children ◽  
Speech Language Pathologist ◽  
Therapy Goals ◽  
Semistructured Interviews ◽  
Types Of Information

Purpose This study examined caregiver perceptions of their child's language and literacy disorder as influenced by communications with their speech-language pathologist. Method The participants were 12 caregivers of 10 school-aged children with language and literacy disorders. Employing qualitative methods, a collective case study approach was utilized in which the caregiver(s) of each child represented one case. The data came from semistructured interviews, codes emerged directly from the caregivers' responses during the interviews, and multiple coding passes using ATLAS.ti software were made until themes were evident. These themes were then further validated by conducting clinical file reviews and follow-up interviews with the caregivers. Results Caregivers' comments focused on the types of information received or not received, as well as the clarity of the information. This included information regarding their child's diagnosis, the long-term consequences of their child's disorder, and the connection between language and reading. Although caregivers were adept at describing their child's difficulties and therapy goals/objectives, their comments indicated that they struggled to understand their child's disorder in a way that was meaningful to them and their child. Conclusions The findings showed the value caregivers place on receiving clear and timely diagnostic information, as well as the complexity associated with caregivers' understanding of language and literacy disorders. The findings are discussed in terms of changes that could be made in clinical practice to better support children with language and literacy disorders and their families.

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