Recent orders
Fire Engineering Simulations and Report
mall has been split into 3 fire compartments (i.e. Arcade 1, Atrium & Arcade 2) by
automatic fire shutters as shown below. The layout of the mall is shown in the sketch
below. The ceiling-to-floor height is assumed to be 4m.
1. CFAST is a zone model that divide the compartment into two control volumes,
a relatively hot upper layer and a relatively cool lower layer, please derive the
system of ordinary differential equation for the compartment pressure. Each
student shall use CFAST to simulate the impact of fires and smoke in the
building environment for 10 minutes duration. The smoke layer height, smoke
temperature and gases concentration of the fire compartments shall also be
reported. (30 Marks)
2. Each student shall also use the Fire Dynamics Simulator (FDS) to predict the
following for 10 minutes duration: (40 Marks)
Temperature distribution;
CO concentration;
Soot visibility distribution;
Radiation heat flux along the egress route.
3. Please propose the smoke extraction system with recommended flowrate to
extent the ASET of the shopping mall. (30 Marks)
x
y
Not to scale
Page 4 of 4
Each student shall:
state the assumptions,
state boundary conditions,
state approaches;
reporting the simulation results and related screenshots captured in
Smokeview for each fire scenario;
maximum 30 pages and printed on both sides.
Psychiatrist Sentenced to Prison for Healthcare Fraud Scheme
Psychiatrist Sentenced to Prison for Healthcare Fraud Scheme
Psychiatrist Sentenced to Prison for Healthcare Fraud Scheme
https://www.justice.gov/usao-edva/pr/psychiatrist-sentenced-prison-healthcare-fraud-scheme
Instructions:
- Overall summary: clearly and concisely analyze and synthesize the type of legal dispute. Do not restate the entire case. Please include the following:
- Title and Case Citation (i.e., the parties in the case, the text in which the case can be found, the court writing the opinion, the year the case was decided)
- Facts (a review of the material facts of the case
- Holding (the court’s ruling based on the facts, issues, and applicable laws pertaining to the case)
- Reason (the rationale for the court’s decision based on facts, issues, and relevant laws surrounding the case)
- Professional reflection:
- What was meaningful to you professionally?
- How was the information important to your future profession?
- How could you apply this new information and/or skills to your professional practice?
- Personal reflection:
- What was meaningful to you personally?
- How and why was the information important to you?
- How will you use the new information and/or skills to enhance your personal health?
Requirements
- Length: 10 pages minimum (not including the cover page and reference/appendix)
- Font: 12-point, Times New Roman
- Spacing: double
- Clear state central purpose of writing this paper.
- Paper should have relevant and legitimate information that clearly supports a central purpose or argument and shows a thoughtful, in-depth analysis of a significant topic.
- The paper should have smooth flow in each argument.
- Use 4 to 6 secondary source references
- Formatting: document according to APA 5th Edition
- Mechanics: correct spelling, grammar, and sentence and paragraph structure
- No plagiarism
Risk Assessment- Occupational Health and Safety
Risk Assessment- Occupational Health and Safety
SCENARIO: Hydrazine is an inorganic compound which is dangerously unstable and
carcinogenic. It is probably toxic as well, but some chronic exposure parameters are uncertain at
this time. Hydrazine is used in preparing polymer foams, rocket fuels, fighter aircraft fuels, and in
the reaction that rapidly inflates vehicle air bags.
You are asked to carry out a risk assessment in two parts:
(1) An explosion scenario at the facility
which addresses the short term exposure of nearby residents to hydrazine in their water supply for a
limited period of time; and
(2) Chronic exposure of nearby residents through the water supply on
an on-going basis as a result of leakage from the plant. Years later, a risk assessment of various
chemicals in the food and water is being performed. Provide the assessment for the combined risk
using the excel sheet (3).
Part 1: Resident carcinogen scenario following explosion at the plant resulting in hydrazine
contamination of the aquifer used for drinking water
Hydrazine dissipates in air within hours, but it can reach the water supply and is thought to remain
there for up to 40 days, presenting a risk for persons drinking well-water containing hydrazine.
The initial (highest) concentration in water at day 1 is 600μg/L, with the concentration reaching
undetectable limits by day 40. Assume constant rate-of-dissipation, so calculate the exposure
assessment as a mean concentration of 300μg/L for the full 40-day exposure. Also assume
contact rate of 2L/d, body weight of 70kg, absorbance and relative retention of 1.0. Show all work
including units.
(a) Given that an explosion has taken place, calculate the expected lifetime incremental risk of
death from cancer per person exposed as specified above for these 40 days.
(b) Given that an explosion has taken place, calculate the hypothetical number of additional
deaths from cancer due to this cause among 50,000 residents exposed through drinking water.
Part 2: Resident carcinogen scenario from continued low-level hydrazine contamination of
the aquifer used for drinking water through leakage. Assume that the continuous leakage of
hydrazine into the ground water from the plant for 12 years results in a constant
concentration in the aquifer of 10.0 µg/L.
(a) What would be the lifetime risk of cancer death for the residents from this exposure
scenario, assuming the parameters
(b) How many people would die from this exposure if the population were 50,000?
(c) Advise this population about how to reduce their intake to acceptable levels if the risk was
147 times more than the de minimis level (note: There is more than a single answer – only
provide one).
Part 3: Years later, soil and water samples are taken and a combined risk assessment is
performed for various chemicals (Note: bioconcentration factor provided in excel sheet to
convert soil values to food values). Using the given excel sheet, answer the following questions:
(a) What is the combined HI and cancer risk to the community from these new chemicals?
(b) Removing the most hazardous combined carcinogenic compounds first, list the chemicals
need to be removed to bring the values to acceptable values?
(c) Removing the most hazardous non-carcinogenic chemicals first, which ones need to be
removed to bring the values to acceptable values?