Risk Analysis Commons^™

Quantum Safety Metrics Framework For Commercial Unmanned Aircraft Operators, Tracy L. Lamb, Nathan A. Phillips, Trong Van Nguyen

International Journal of Aviation, Aeronautics, and Aerospace

Commercial unmanned aircraft systems continue to increase in applications and diversity; however, mishaps and accidents erode safety, investment return, and efficiency. Most unmanned aircraft accidents are preceded by leading indicators; the ability to forecast and quantify these may provide increased safety and profitability. This mixed-method research study used a non-experimental parallel convergence approach with multiple instruments, multiple-case study n = 22, and one exemplar case design to develop a quantum safety metric program. This study used a combination of previously validated methods as development instruments, including; the HFACS, STAMP, 'Sierra Scale,' and Accident Prevention Effort equations. The study extended the …

Improving Real-Time Methane Monitoring In Longwall Coal Mines Through System Response Characterization Of A Multi-Nodal Methane Detection Network, Brian Philip Cappellini

Graduate Theses, Dissertations, and Problem Reports (ETD)

Machine automation and atmospheric monitoring are used by many industries to improve safety and productivity in the workplace. The underground Methane Watchdog System (MWS) is a multi-nodal network of sensors currently under development. The MWS aims to improve safety and productivity by introducing 10 compact sampling units designed to be easily integrated within the current roof support equipment of the mine. Each unit contains an array of sensors used to continuously monitor the environmental conditions which include methane concentration, temperature, pressure, and relative humidity. All MWS units report information back to a remote central processing hub (CPH) which collects nodal …

Assessments Of Chromium Pollution In Surface Sediment Of The Inner Gulf Of Thailand, Patcha Leelakun

Chulalongkorn University Theses and Dissertations (Chula ETD)

The inner Gulf of Thailand is an important marine resource for economic and social developments of Thailand. Moreover, the inner Gulf of Thailand is a diverse of biological coastal ecosystem, which is make an equilibrium marine environment. On the other hand, this area is due mainly to a variety of pollutant sources from the surface runoff, particularly major large rivers including the Mae Klong, the Tha Chin, the Chao Phraya and the Bangpakong Rivers. As a result, chromium contamination can occur in the inner Gulf of Thailand and ultimately become a serious environmental issue in Thailand. Therefore, the surface sediments …

Influence Of Seasonal Variations On Contamination Level And Ecological Risk Of Heavy Metals In The Surface Sediments Of The Inner Gulf Of Thailand, Phuttiphat Lapat-Atiwat

Chulalongkorn University Theses and Dissertations (Chula ETD)

The Inner Gulf of Thailand is a marine resource that provides ecological and economic value. Meanwhile, its can be acted like pollutions sink, especially heavy metals. After that, the extensions of industrialization, agriculturalization, and urbanization can degenerate to the inner Gulf environment quality. Therefore, this thesis was aimed to study the spatial distribution and seasonal variation of heavy metal concentration (Cd, Pb, Cu, Co, Ni, Mn and Zn) in surface sediment including the Mae Klong, the Tha Chin, the Chao Phraya and the Bangpakong River estuaries. Moreover, the contamination status and ecological risk were also evaluated. The results shown the …

Evaluation Of Cadmium Bioaccumulations In Pak Choi Grown By Hydroponics System, Piyachet Jinsart

Chulalongkorn University Theses and Dissertations (Chula ETD)

Cadmium is one of the most harmful heavy metals reported to contaminate the food chain and pose a high risk for health, including non-carcinogenic and carcinogenic effects. High levels of cadmium contamination due to industrial effluent discharge have been reported to affect plant growth and productivity, which could be used as a bio-indicator for cadmium bioaccumulation in plants. The utilization of cadmium-contaminated water for vegetable production has been known to increase the health risk for human consumption. Moreover, pH level was known as a factor affecting cadmium solubility and cadmium uptake by plants. However, there is still unknown about critical …

Investigation Of Copper And Zinc Contaminations In Bioponic Systems Using Chicken Manure Fertilizer, Satja Aksorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

The bioponic system is a system that utilizes biological waste as a nutrient-rich source such as chicken manure fertilizer for plant growth integrated with aquaponic. At present, chicken manure fertilizer is contaminated with Cu and Zn may have the potential health effects through vegetable consumption. The objective of this study was to evaluate nitrogen transformation, nitrogen recovery, and plant growth in chicken manure-based bioponics at Cu (50–150 mg/kg) and Zn (200–600 mg/kg) supplementation and investigate the effects of Cu and Zn supplementations on plant bioaccumulation, root microbial community, and dietary health risk. Cu and Zn concentrations were analyzed using inductively …

Ecological Risk Assessment Of Microplastics And Heavy Metals In Central Industrial Wastewater Treatment Plant, Thamonwan Phuprasert

Chulalongkorn University Theses and Dissertations (Chula ETD)

Microplastics become a big concern in environment. Their small particle size can absorb a variety of pollutants from the nearby environment when discharged into the environment, especially heavy metals. Central industrial wastewater treatment plant (WWTP) is an important source of microplastics in the environment. In this study, wastewater and sludge were collected from two industrial estates in Thailand. Wastewater was collected from 4 points i.e., influent, post grit chamber, post aeration tank, and post sedimentation tank while sludge was collected from sludge storage. Concentration of microplastics, heavy metals and heavy metals on microplastics were examined to evaluate ecological risk assessment. …

A Development Of Disaster Risk Profile In Public Healthcare System During Flood Situation : A Case Study Of Nakhon Sawan City Municipality, Nakhon Sawan Province, Thailand, Kodchakorn Krutphong

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research begins with the idea of the disaster risk assessment included in the disaster management’s well recognized international framework, the Sendai Framework for Disaster Risk Reduction. Then, the idea settles from the risk assessment concept combined with the emergency management knowledge that has the critical infrastructure topic, including the public healthcare system. The flood disaster is the kind of disaster that frequently occurs in Thailand and the study area, Nakhon Sawan City Municipality. Thus, this research aims to study disaster risk profiles in the public healthcare system in a specific local area. The outcome from this research is the …

การประเมินความเสี่ยงทางสุขภาพของพนักงานที่สัมผัสฝุ่นและโลหะหนักในโรงงานกำจัดกากอุตสาหกรรม, ประหยัด เคนโยธา

Chulalongkorn University Theses and Dissertations (Chula ETD)

พนักงานในโรงงานกำจัดกากอุตสาหกรรมทั้งสองแห่งได้รับสัมผัสมลภาวะต่างๆ เช่น ฝุ่นละออง (PM; PM2.5 และ PM10-2.5) และโลหะหนักที่ปนเปื้อนในกระบวนการกำจัดขยะ การวิจัยนี้เพื่อศึกษาความเสี่ยงทางสุขภาพของพนักงานที่สัมผัสฝุ่นและโลหะหนักในสถานที่ทำงาน พบฝุ่นขนาด PM2.5 มีความเข้มข้นในตัวอย่างที่เก็บแบบพื้นที่ (30.33±2.51 และ 41.21±1.12 µg/m3) เก็บแบบบุคคล (45.86±9.85 และ 144.99±119.11 µg/m3) และฝุ่นขนาด PM10-2.5 ในตัวอย่างที่เก็บแบบพื้นที่ (14.77±0.29 และ 15.09±0.35 µg/m3) เก็บแบบบุคคล (27.73±8.63 และ 48.04±43.49 µg/m3) ในโรงงาน 1 และ 2 ตามลำดับ ความเข้มข้นของโละหนัก As, Cd, และ Pb ในตัวอย่างฝุ่นโรงงาน 1 ที่เก็บตัวอย่างแบบพื้นที่มีค่า 1.19±0.09, 0.55±0.05 และ 0.78±0.14 µg/m3, เก็บแบบบุคคลมีค่า 1.22±0.08, 0.55±0.08, และ 0.87±0.12 µg/m3 ตามลำดับ ในโรงงาน 2 ที่เก็บตัวอย่างแบบพื้นที่มีค่า 0.52±0.21, 0.55±0.05 และ 0.38±0.05 µg/m3 เก็บแบบบุคคลมีค่า 0.58±0.13, 0.53±0.06 และ 0.41±0.05 µg/m3 ตามลำดับ โดยระดับโลหะหนัก As Cd และ Pb ในฝุ่นมีค่าอยู่ในขีดจำกัดของกฎหมายด้านอาชีวอนามัยกำหนด และในตัวอย่างฝุ่นไม่พบโลหะหนัก Cr และ Hg และค่าเฉลี่ยของโลหะหนัก As-total Cr Cd Pb และ Hg ในปัสสาวะพบว่า As-total (91.67±98.63 และ 59.29±32.03 µg/L) Cr (0.82±0.51 และ 1.03±1.02 …

Fuzzy Cognitive Map-Based Knowledge Representation Of Hazardous Industrial Operations, Francesco Longo, Antonio Padovano, Letizia Nicoletti, Caterina Fusto, Mohaiad Elbasheer, Rafael Diaz

VMASC Publications

Hazardous industrial operations are highly stochastic, still human-dependent, and risky. Operators working in such an environment must understand the complex interrelation between several factors contributing to safe and effective operations. Therefore, being able to predict the effects of their actions on provoking or mitigating possible accidents is crucial. This study aims to utilize fuzzy cognitive maps (FCM) to model the expert’s reasoning about occupational health and safety (OHS) in confined space. This knowledge is used by operators to build their mental models. The developed FCM displays all the possible incidents of a confined space and links these incidents with all …

Developing An Artificial Intelligence Framework To Assess Shipbuilding And Repair Sub-Tier Supply Chains Risk, Rafael Diaz, Katherine Smith, Beatriz Acero, Francesco Longo, Antonio Padovano

VMASC Publications

The defense shipbuilding and repair industry is a labor-intensive sector that can be characterized by low-product volumes and high investments in which a large number of shared resources, technology, suppliers, and processes asynchronously converge into large construction projects. It is mainly organized by the execution of a complex combination of sequential and overlapping stages. While entities engaged in this large-scale endeavor are often knowledgeable about their first-tier suppliers, they usually do not have insight into the lower tiers suppliers. A sizable part of any supply chain disruption is attributable to instabilities in sub-tier suppliers. This research note conceptually delineates a …

Conceptual Development Of A Probabilistic Graphical Framework For Assessing Port Resilience, Katherine Smith, Rafael Diaz, Yuzhong Shen, Francesco Longo

VMASC Publications

Technological advances such as cyber physical systems and autonomous vehicles combined with increased disruptions including the Covid-19 pandemic and coastal natural disasters have heightened the importance of port risk analysis methodologies and frameworks that can accurately quantify and optimize resilience. This work presents the conceptual development of a novel combination of analysis methodologies linking a probabilistic graphic approach on a network of risk events with a functional dependency approach on a system network. Key advantages of these two methodologies are the ability to model and learn causal interactions rather than simply correlations and a high level of computational efficiency. This …

Open Voting Client Architecture And Op-Ed Voting: A Novel Framework For Solving Requirement Conflicts In Secret Ballot Elections, Aaron M. Wilson

UNF Graduate Theses and Dissertations

Building voting systems for secret ballot elections has many challenges and is the subject of significant academic research efforts. These challenges come from conflicting requirements. In this paper, we introduce a novel architectural approach to voting system construction that may help satisfy conflicting requirements and increase voter satisfaction. Our design, called Open Voting Client Architecture, defines a voting system architectural approach that can harness the power of individualized voting clients. In this work, we contribute a voting system reference architecture to depict the current voting system construction and then use it to define Open Voting Client Architecture. We then detail …

Integrating Human And Ecotoxicological Impacts Into Willingness To Pay Evaluation: Transition From Paraquat To Atrazine Use In Sweet Corn Cultivation, Patharanun Toolkiattiwong

Chulalongkorn University Theses and Dissertations (Chula ETD)

The paraquat ban has led to a shift in the use of pesticides in sweet corn cultivation, atrazine as one of the alternative pesticides. This change has led to altered human-ecological impacts that have yet to be explored. The related monetary values of farmers as reflected through their willingness to pay is unknown. This study assessed the health and freshwater ecotoxicity impacts of paraquat and atrazine in soil cultivation using the USEtox 2.12 model. The value of farmers on the impact of the change was explained by willingness to pay (WTP). The theory of planned behavior (TPB) factors, a psychological …

Insuring The 'Uninsurable': Catastrophe Bonds, Pandemics, And Risk Securitization, Steven L. Schwarcz

Faculty Scholarship

In principle, governments could protect against the potential economic devastation of future pandemics by requiring businesses to insure against pandemic-related risks. In practice, though, insurers do not currently offer pandemic insurance. Although they may well be able to obtain sufficient actuarial data to set pandemic underwriting standards and rate tables, insurers are concerned that they lack sufficient capacity, as an industry, to cover those risks, which are likely to occur worldwide and to be highly correlated. Pandemics therefore are in the class of risks, like war, terrorism, and riots, that are deemed “uninsurable,” at least by private markets. This Article …

Effects Of Calcination Temperature Of Naturally Occurring Absorbents On Drinking Water Defluoridation, Brenda Mndolwa

Tanzania Journal of Engineering and Technology (TJET)

Currently, in Tanzania, fluoride removal from drinking water is treated mostly using the bone char method. The method has poor acceptability in some religious communities and also causes water quality deterioration in taste and odour if the bones are not properly prepared. The use of local natural adsorbents as an alternative is feasible with limitations of high levels of other impurities in treated water. Locally available gypsum, magnesite and bauxite were converted to adsorbents through calcination. The study was conducted to determine the removal efficiency, best calcination temperature and composite ratio of the three adsorbents for the removal of fluoride …

The Ftc And Ai Governance: A Regulatory Proposal, Michael Spiro

Seattle Journal of Technology, Environmental, & Innovation Law

No abstract provided.

Small Modular Reactors And Advanced Reactor Security: Regulatory Perspectives On Integrating Physical And Cyber Security By Design To Protect Against Malicious Acts And Evolving Threats, Raphael Duguay

International Journal of Nuclear Security

How can future nuclear technologies and Small Modular Reactors (SMRs) deter and prevent organized crime groups, terrorists, and malicious actors from attempting to steal or sabotage nuclear materials and facilities? This paper presents the benefits of integrating Security by Design (SeBD) into a regulatory framework to allow more a flexible and effective design of physical protection systems for SMRs. During its effort to modernize the Nuclear Security Regulations, the Canadian Nuclear Safety Commission (CNSC) licensing application process provides for the option of SeBD in moving toward a performance-based approach with less prescriptive requirements. CNSC also recognizes the need for a …

Research On Risk Identification, Evaluation And Countermeasures Of Liquid Dangerous Cargo Ships In Yangpu Waters, Xiaofeng Han

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Using Interacting Multiple Model Filters To Indicate Program Risk, Amy Sunshine Smith-Carroll

Engineering Management & Systems Engineering Theses & Dissertations

Technology development has increased exponentially. Program managers are pushed to accelerate development. There are many resources available to program managers that enable acceleration, such as: additional resources in the form of funding, people and technology. There are also negative impacts to acceleration, such as: inclusion, inexperience program managers, and communication. This research seeks to identify the limit to which a program or project can be accelerated before the program manager begins to accept an unacceptable amount of pre-determined risk.

This research will utilize estimation algorithms used by sensor systems to estimate the current and future state of objects in space. …