scholarly journals Forensic Engineering Investigation - pumps And Motors Damaged in A Power Plant Explosion

2011 ◽  
Vol 28 (2) ◽  
Author(s):  
Richard W. Grounds
Keyword(s):  
Power Plant ◽  
Lead Times ◽  
Insurance Carrier ◽  
Secondary Damage ◽  
Plant Personnel ◽  
Forensic Engineering ◽  
The Difference ◽  
Serious Injury ◽  
Engineering Investigation

In Addition To Serious Injury Or Loss Of Life To Plant Personnel, Plant Explosions May Cause Significant direct Or Secondary Damage To Facility Machinery, Resulting In Lost Production Time, Costly Repairs, Or replacement Of The Damaged Equipment.  given The Long Procurement Lead Times And Higher Costs Typically Associated With Engineered Machinery (Machinery Not Available Off-The-Shelf), It Is Crucial To Make An Early Determination Of Whether or Not The Damaged Equipment Is Serviceable And Capable Of Providing Reliable Operation After Repairs, Or if The Machinery Must Be Replaced. The Difference In Cost Between The Two Alternatives Is Substantial To the Owner, Insurance Carrier, And All Invested Parties, Particularly When Production Losses Are Considered.  the Focus Of This Investigation Was Four New Machinery Trains Damaged In A Power Plant Natural Gas explosion That Occurred As Construction Of The Facility Neared Completion. Claims For Replacement Machinery were Filed By Various Risk Management Firms On Behalf Of The Builder And Facility Owners, And were Presented To A Claims Adjusting Firm Enlisted By The Insurance Carriers. Independent Consultants were Engaged By The Owners And Claims Adjuster To Examine The Damaged Machinery And Report Findings to The Engaging Parties, With The Findings Being Considered In The Evaluation Of Whether Or Not The machinery Would Be Serviceable Upon Refurbishment.

scholarly journals A Forensic Engineering Investigation Of a Ladder Failure

2009 ◽  
Vol 26 (2) ◽  
Author(s):  
Nicholas A. Petrucci
Keyword(s):  
Load Capacity ◽  
National Standards ◽  
Shear Load ◽  
Improper Use ◽  
Forensic Engineering ◽  
Left Front ◽  
Engineering Investigation

A Worker (Plaintiff) Fell From A Step-Ladder And Was Injured. The Purpose Of The Forensic Engineering Investigation Was To Determine The Cause(S) Of The Incident, And In Particular, If The Incident Was Caused By A Ladder Defect. The Incident Ladder And A Representative Incident Scene Were Inspected. Various Discovery Documents And The Applicable American National Standards Institute (Ansi) Standard Were Reviewed. A Critique From The Opposing (Defendant) Expert Is Presented And Addressed. The Cause Of The Plaintiff Fall From The Ladder Was Determined To Be Its Sudden Instability Due To The Failure Of A Rivet That Secured The Top Cap To The Left-Front Rail. The Failed Rivet Was Not Recovered. Further Analysis Indicated That The Cause Of The Rivet Failure Was Its Defective Design Coupled With Its Reduction In Shear Load Capacity From Normal And Improper Use Of The Ladder. The Determination Of The Defective Design Of The Rivet Was Confirmed By Subsequent Design Improvements Of The Ladder. The Relevance Of The Analysis Performed Is Discussed. Various Noteworthy Points Are Presented For Consideration For Forensic Engineers Of Various Technical Disciplines.

scholarly journals Forensic Engineering Investigation Of Fire And Explosion Scenarios In A Power Plant

2008 ◽  
Vol 25 (1) ◽  
Author(s):  
Juan F. Charles
Keyword(s):  
Power Plant ◽  
Failure Modes ◽  
Electrical Power ◽  
Fault Tree Analysis ◽  
Final Conclusion ◽  
Pareto Analysis ◽  
Forensic Engineering ◽  
Fire And Explosion ◽  
To Come ◽  
Engineering Investigation

This Paper Addresses The Integration Of Multidisciplinary Tasks Of Forensic Engineering Investigation, Analysis, And Conclusions In The Complex Scenarios Of An Electrical Power Plant That Was Completely Burned Up. The Scenarios That Resulted From A Fire Or Explosion Could Be Simple Or Complex, Depending On The Magnitude Of The Damage And The Physical Condition Of The Remaining Debris. The Results Of Our Investigation Show That Many Variables And Subsystems Are Interrelated And Cannot Be Isolated As A Simple Cause Of The Occurrence. It Is Very Difficult To Come To A Final Conclusion Without Taking Into Consideration All Variables And Subsystems Of All The Scenarios. In This Paper The Author Intends To Explain How The Forensic Engineer Can Determine Credible Technical Conclusions Based On The Utilization Of The Most Reliable Analytical And Methodological Tools, Such As Fault Tree Analysis And Pareto Analysis, In Combination With Failure Modes And Effects Analysis (Fmea).

scholarly journals Forensic Engineering Investigation Of Leakage At Flanged Windows In Stucco

2004 ◽  
Vol 21 (1) ◽  
Author(s):  
Geoffrey Jillson
Keyword(s):  
Water Entry ◽  
Test Apparatus ◽  
Water Penetration ◽  
Framed Structures ◽  
Forensic Engineering ◽  
Quantitative Results ◽  
The Common ◽  
Wood Frame ◽  
Engineering Investigation

Water Intrusion And Accumulation In The Exterior Envelope Of Wood Frame Structures With Stucco Siding And Flanged Windows Has Been Recognized As A Major Cause Of Damage Characterized By Deterioration Of Sheathing And Framing. Invasive Inspections Of Hundreds Of Wood Framed Structures Constructed In This Manner Have Clearly Shown That The Overwhelming Cause Of Deterioration Has Resulted From Chronic Water Entry Into The Envelope At Window And Door Locations. Substantial Deterioration Has Been Observed In Sheathing And Framing As Early As The Third Season Following Construction With Extensive Deterioration Observed In Many Structures By The Fifth Or Sixth Year Following Construction Manifesting Primarily At Window And Door Penetration Areas In The Envelope. This Study Was Undertaken To Quantitatively Ascertain The Causes Of The Water Entry At Flanged Windows In Stucco Siding Installations And Compare With Water Entry At Wood Windows In Stucco Siding Utilizing Astm E1105-00 Field Determination Of Water Penetration Of Installed Exterior Windows, Skylights, Doors, And Curtain Walls, By Uniform Or Cyclic Static Air Pressure Difference. Effects Of Sealing/Caulking Of The Perimeter Of The Window At The Stucco/Window Intersection Were Also Studied And Quantified Using The Test Apparatus. This Paper Provides A Description Of The Common Construction Conditions And Presents The Quantitative Results Of The Study Of Causes Of Leakage At Flanged Windows In Stucco And The Effect On Leakage Of Sealing/Caulking Of Perimeter Joint.

scholarly journals Forensic Engineering Investigation Of 2004 Florida Hurricane Damages

2005 ◽  
Vol 22 (1) ◽  
Author(s):  
Wilbur T. Yaxley ◽  
Bracken William C.
Keyword(s):  
Hurricane Season ◽  
Forensic Engineering ◽  
The Difference ◽  
Engineering Investigation

Florida Was Hit By Four Major Hurricanes In Six Weeks During The 2004 Season. Some Areas Had The Eye Of The Hurricane Pass Over Their Location During Three Of The Four Storms. In Some Of Those Cases Before Repairs Were Completed, Another Hurricane Hit The Same Area. This Was The Worst Possible Scenario. Preparation For The Hurricane Season Is Important And Can Be The Difference Between A Reasonably Comfortable Survival And A Miserable Existence Until Your Home Is Again Livable. The Planning Should Begin When You Decide On The Place You Wish To Buy, Rent, Or Share With A Friend Or Relative. Some Of The Important Items To Be Considered Are Somewhat Subtle, And Should Contain The Following Considerations:

FRACTIONAL DETERMINATIONS OF URINARY 17-KETOSTEROIDS IN HYPEREMESIS GRAVIDARUM

1962 ◽  
Vol 41 (1) ◽  
pp. 123-128 ◽  
Author(s):  
Pentti A. Järvinen ◽  
Sykkö Pesonen ◽  
Pirkko Väänänen
Keyword(s):  
Hyperemesis Gravidarum ◽  
First Trimester ◽  
Control Group ◽  
Before And After ◽  
Daily Urine ◽  
First Trimester Of Pregnancy ◽  
The Difference

ABSTRACT The fractional determination of 17-ketosteroids in the daily urine was performed in nine cases of hyperemesis gravidarum and in four control cases, in the first trimester of pregnancy both before and after corticotrophin administration. The excretion of total 17-KS is similar in the two groups. Only in the hyperemesis group does the excretion of total 17-KS increase significantly after corticotrophin administration. The fractional determination reveals no difference between the two groups of patients with regard to the values of the fractions U (unidentified 17-KS), A (androsterone) and Rest (11-oxygenated 17-KS). The excretion of dehydroepiandrosterone is significantly higher in the hyperemesis group than in the control group. The excretion of androstanolone seems to be lower in the hyperemesis group than in the control group, but the difference is not statistically significant. The differences in the correlation between dehydroepiandrosterone and androstanolone in the two groups is significant. The high excretion of dehydroepiandrosterone and low excretion of androstanolone in cases of hyperemesis gravidarum is a sign of adrenal dysfunction.

THE SUBJECT FIELD OF INSTITUTIONAL EDUCATION: THE SENSE AND PROSPECTS OF DEVELOPMENT IN UKRAINE

2020 ◽  
pp. 25-38
Author(s):  
Irina Mordous
Keyword(s):  
Decisive Role ◽  
Subject Field ◽  
National Education ◽  
Progressive Development ◽  
Separate Area ◽  
Economic Transformations ◽  
The Difference ◽  
The Individual ◽  
Political Economic

The development of modern civilization attests to its decisive role in the progressive development of institutions. They identified the difference between Western civilization and the rest of the world. Confirmation of the institutional advantages of the West was its early industrialization. The genesis and formation of institutionalism in its ideological and conceptualmethodological orientation occurs as a process alternative to neoclassic in the context of world heterodoxia, which quickly spread in social science. Highlighting institutional education as a separate area of sociocultural activity is determined by the factor of differentiation of institutional theory as a whole. A feature of institutional education is its orientation toward the individual and his/her transformation into a personality. The content of institutional education is revealed through the analysis of the institution, which includes a set of established customs, traditions, ways of thinking, behavioral stereotypes of individuals and social groups. The dynamics of socio-political, economic transformations in Ukraine requires a review of the foundations of national education and determination of the prospects for its development in the 21st century in the context of institutionalism.

Determination of Traces Heavy Metals from Solid Residues Formed by Combustion of Lignite in Relation to Degree of Accessibility in Soil and Plants

2017 ◽  
Vol 68 (10) ◽  
pp. 2363-2366
Author(s):  
Delia Nica Badea
Keyword(s):  
Heavy Metals ◽  
Power Plant ◽  
Thermal Power ◽  
Reference Value ◽  
Combustion Products ◽  
Toxic Heavy Metals ◽  
Area Of Influence ◽  
Risk Potential

The paper evaluates the presence and content of traces of heavy metals Hg, Pb, Ni, Cd (total forms) from coal and solid combustion products, the degree of transfer and accessibility in the area of influence of a lignite power plant. The content of toxic heavy metals in residues are characterized by RE Meiji [ 1 (Pb and Hg) and REMeij �1 (Ni and Cd) for the filter ash. Pb and Ni content in the soil exceeds normal values, and Pb exceeds and alert value for sensitive soils around the residue deposit (70.20 mg.Kg-1). The degree of accessibility of the metals in plants (TF), reported at the Khan reference value (0.5), indicates a significant bioaccumulation level for the metals: Cd (1.9) and Hg (0.6) inside the deposit; Cd (0.39) at the base of the deposit, Hg (0.8) in the area of the thermal power plant. The trace levels of heavy metals analyzed by GFAAS and CVAAS (Hg), indicates a moderate risk potential for food safety and quality of life in the studied area.

scholarly journals Possibility of Human Gender Recognition Using Raman Spectra of Teeth

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3983
Author(s):  
Ozren Gamulin ◽  
Marko Škrabić ◽  
Kristina Serec ◽  
Matej Par ◽  
Marija Baković ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Principal Component ◽  
Support Vector ◽  
Gender Recognition ◽  
Proof Of Concept ◽  
Male And Female ◽  
Tooth Type ◽  
Tooth Apex ◽  
The Difference

Gender determination of the human remains can be very challenging, especially in the case of incomplete ones. Herein, we report a proof-of-concept experiment where the possibility of gender recognition using Raman spectroscopy of teeth is investigated. Raman spectra were recorded from male and female molars and premolars on two distinct sites, tooth apex and anatomical neck. Recorded spectra were sorted into suitable datasets and initially analyzed with principal component analysis, which showed a distinction between spectra of male and female teeth. Then, reduced datasets with scores of the first 20 principal components were formed and two classification algorithms, support vector machine and artificial neural networks, were applied to form classification models for gender recognition. The obtained results showed that gender recognition with Raman spectra of teeth is possible but strongly depends both on the tooth type and spectrum recording site. The difference in classification accuracy between different tooth types and recording sites are discussed in terms of the molecular structure difference caused by the influence of masticatory loading or gender-dependent life events.

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