PAPER DESCRIPTIONS
A Question of Standards
Salter, L., November 1992 (Paper
29)
The concept of "risk" is a relatively recent.
In previous eras scientists assessed the effects and implications
of particular chemicals, policy makers dealt with potentially
dangerous chemicals and the public was mainly concerned with
spills and accidents, dangers and safety levels. Standards
are numbers that indicate the level of contamination considered
to be safe. Standards comprise the foundation for risk assessment.
A Study of Mortality
in Canadian Cities
Siddall, E., January 1989 (Paper
13)
This paper investigates the development of a "people-centred" approach
rather than "source centered" relation to risk.
It attempts to bring out what is important among the immense
variety of risks, natural and artificial to which human life
in the advanced societies is exposed and what broad factors
in the human environment are likely to be having an effect
on on levels of safety.
Addressing Decision Making Capacity in Northern Communities:
An Integrative Approach
Furgal, C., August 1996 (Paper 36)
In relation to the risks to health, culture, and economy
and changes imposed by external influences such as environmental
contaminants, three areas of research have made significant
contributions to our knowledge, understanding, and the decision-making
processes dealing with problems. Advances have been made
in theory and practice in the areas of traditional knowledge
and western science, benefit and risk management and community
and regional planning and decision-making in approaching
the issues related to northern community decision-making
capacity. This paper describes these contributions and illustrates
how they might be applied to the issues of capacity in dealing
with public health and policy issues in the Canadian North.
Application of the Life Quality Index to the Risk-Cost-Benefit
Analysis of Quarries Operation in Kuwait
Al-Ali, W., Pandey, M., Nathwani, J., April 1998 (Paper
37)
In this case study, the authors apply the Life Quality Method
(LQI), developed by the Institute for Risk Research evaluating
the environmental and health impacts associated with operation
of quarries in Kuwait. The quarries contribute to degradation
in air quality resulting from an increased concentration
of particulate in the respirable range. The excess health
effects have been documented.
Computer Programming in English
Siddall, E., June 1993 (Paper 33)
This paper is written as a consequence of the difficulties
which arose from the use of computers for the first time
in the direct automatic functional paths of the shutdown
systems of the Darlington nuclear power plant in Ontario,
Canada. It does not introduce another programming language.
It urges that communication both ways between people and
computers should be in the single well-established language
that people use.
Conflict Analysis
of an Acid Rain Dispute
Fang, L., Hipel, K.W., Kilgour, D.M., July 1990 (Paper
19)
Conflict analysis methodology is used to carry out a systematic
study of an acid rain conflict in North America, specifically
the issues surrounding transboundary pollution in the eastern
United States and Canada in early 1989.
Conflict Analysis
of Technological Risk
Yin, X., Hipel, K.W., Lind, N.C., February 1987 (Paper
10)
After introducing an explanation of cultural bias in the
attitudes to technological risk using the cultural-environmental
theory of perception, the approach of conflict analysis is
employed to study technological disputes involving risk.
A generalized model of conflict due to technological risk
is presented and analyzed. In addition, the methodology is
applied to a "real world" dispute involving the
siting of liquified natural gas facilities in the Netherlands.
Conflict Analysis
of the Darlington Nuclear Power Dispute
Fang, L., Hipel, K.W., Kilgour, D.M., May 1989 (Paper
14)
This paper deals with the conflict model that puts the various
aspects of the Darlington conflict into proper perspective,
and thereby furnishes decision makers and others an appropriate
basis for reaching a better understanding of the dispute.
Correlation Between Carcinogenic Potency and the Maximum
Tolerated Dose: Implications for Risk Assessment
Krewski, D., Gaylor, D.W., Soms, A.P., Szyszkowica,
June 1993 (Paper 32)
Current practice in carcinogen bioassay calls for exposure
of experimental animals at doses up to the maximum tolerated
dose (MTD). Such studies have been used to compute measures
of carcinogenic potency for predicting low dose risks. Recent
studies have indicated that these measures of carcinogenic
potency are highly correlated with the MTD. Carcinogenic
potency has also been shown to be correlated with indicators
of mutagenicity and toxicity. Correlation of the MTDs for
rats and mice implies a corresponding correlation in TD50
values for these 2 species. The implications of these results
for cancer risk assessment are examined in light of the large
variation in potency among chemicals know to induce tumors
in rodents.
Cross-Entropy Estimation
of Random Variables with Fractile Constraints
Lind, N.C., Solana, V., March 1988 (Paper
11)
Assumptions about the distribution type for random variables
in nature and technology can rarely be justified in risk
analysis. They are here replaced by constraints of known
fractiles obtained by random sampling. These fractile constraints
can be defended on strong methodological grounds. A general
solution of the minimum cross-entropy problem with fractile
constraints is given.
Discounting in Risk
Analysis: Capital vs. Human Safety
Paté-Cornell, M.E., December 1983 (Paper
7)
Common arguments against discounting in evaluation of prospects
involving human health and safety are examined, departing
from the reasons for discounting in economics and examining
the circumstances under which they may be extended to life
and limb. On the principle of treating future generations
as we want to be treated today, author considers the amount
of capital to be invested today to save a life at a time
in the future and concludes that the same discount rate applies
to capital and to lifesaving. Author concludes that the pretax
marginal return on capital in society (excl. inflation),
running mostly at 6-10% is an appropriate rate when cost-benefit
analysis is at all acceptable, and suggests similar principles
can be applied to spatial as to temporal comparison, e.g.
to international situations.
Dose Response
Models for Time to Response Toxicity Data
Kalbfleisch, J.D., Krewski, D., Van
Ryzin, J., January 1983 (Paper 2)
This paper concerns the modelling and analysis of toxicity
data in which the time to some toxic response is recorded
and of importance, including dose response models, models
for competing risks and possible approaches.
Likelihood construction is discussed and appropriate likelihood
contributions are derived. The paper concludes with a discussion
of measures of risk which take account of the time dependence
of the toxic response under study.
Dose-Response Relationships in Carcinogenesis
Krewski, D., Goddard, M.J., Zielinski, J.M., October
1992 (Paper 28)
Considerable information on the carcinogenic potential of chemical and radiological
agents has accumulated from epidemiological and toxicological studies conducted
to date. In this article we discuss dose-response relationships in carcinogenesis
from both an empirical and theoretical point of view. Emphasis is placed on the
application of biologically based models to describe observed dose-response relationships
for exposure to single and multiple agents known to increase cancer risk. The
implications of these observations for inferences about possible mechanisms of
carcinogenesis are explored.
Enforcement of Environmental Laws and Regulations: A Literature
Review
Fang, L., Hipel, K.W., Kilgour, D.M., June 1992 (Paper
24)
The effective enforcement of environmental laws and regulations
is crucial for proper environmental risk management. As emphasized
in Canada's Green Plan, which was recently released
by the Government of Canada (1990, p. 156), "Legislation
and regulation are only as good as their enforcement." This
report contains a detailed literature survey covering verification
theory, its applications, and current environmental enforcement
policies in Canada and the United States. In addition, the
applicability of verification theory to environmental enforcement
policies is assessed.
Global Energy Use and Energy Alternatives in Relation to
Economic and Social Well-Being
Nathwani, J.S., Siddall, Lind, N.C., December
1990 (Paper 22)
This paper summarizes the results of a study entitled "Management
of Risks in The Public Interest: A Study of the Social and
Economic Impacts of Energy," by N.C. Lind, J.S. Nathwani,
E. Siddall. This study provides a framework for assessing
the choices among alternatives. If the principle of maximizing
the net benefit to society were to be considered a reasonable
first step, the the proposals to reduce energy consumption,
like all other proposals should also be subjected to a dispassionate
assessment of the benefits and detriments.
Guide to Consultation Processes
Leiss, W., January 1993 (Paper 31)
This Guide incorporates the results of a workshop held at
the Heron Road Training Centre, July 1991. The workshop was
planned and sponsored by the Issues, Planning and Priorities
Division of the Pesticides Directorate. The workshop participants
developed in their small-group sessions case study applications
based on an approach to consultation paths developed for
this workshop. Therefore, this Guide is the produce of the
combined efforts of all those involved.
Information Theory
and Estimation of Random Variables
Lind, N.C., May 1989 (Paper 15)
A principle based on information theory is presented for
the estimation of (distributions of) continuous random variables
on the basis of sample data. An estimate pair (p,q), usually
non-parametric, is found in 2 steps: first a reference distribution
p is selected from a restricted model and next a posterior
distribution q is selected satisfying the "sample rule."
Interactive Selection
of Minimum Risk Routes for Dangerous Goods Shipments
Saccomanno, F.F., Van Aerde, M., Queen, D., April
1986 (Paper 9)
An interactive model for routing shipments of dangerous
goods through an urban road network is presented and demonstrated.
The model computes minimum risk routes based on each shipment's
origin and destination, and illustrates graphically the selected
paths.
Issues and Challenges
in Risk Communication and the Mass Media
Craig, L., ed., March 1990 (Paper
17)
Report on a workshop held October 1989 sponsored by the
Asbestos Institute, Health and Welfare Canada and the Institute
for Risk Research to explore the risk communication concerns
of representatives from media, industry, government and academia.
Management
of Gross Error in Design and Construction of Structures
Lind, N.C., February 1983 (Paper 3)
This paper develops a strategy for allocating resources
to inspection and control of structures. The formulation
entails a classification by attributes of the design of the
structure or its production process available to the inspecting
authority before completion. The approach is minimization
of the total amount of inspection subject to constant expected
failure loss. The solution involves the probability of failure
for each structural class and its derivation with respect
to the amount of control.
Management of Risks
in the Public Interest: A Study of the Social and Economic
Impacts of Energy
Nathwani, J.S., Lind, N.C., Siddall, E., December
1990 (Paper 20)
This paper is a brief summary of the scope, the theme and
the major conclusions of a study entitled "Management
of Risk in the Public Interest: A Study of the Social & Economic
Impacts of Energy," by N.C. Lind, J.S. Nathwani, E.
Siddall. The study is a model framework for making decisions
about risks and benefits and how the basis for such decisions
can be improved through a more rational and scientific approach.
Measurement of Safety in Relation to Social Well-Being
Lind, N.C., Nathwani, J.S., Siddall, E. December
1990 (Paper 23)
Maximizing the expected total net benefit - the classical
utilitarian objective - is proposed as the goal of regulation
of hazardous technology in the public interest. In particular,
2 very similar criteria are presented for net benefit assessment
of a project or a proposed regulation: the HDI criterion,
derived from the Human Development Index (HDI) due to the
United Nations Development Programme, and the LPI criterion,
derived from first principles in this paper. The application
is illustrated by an example.
Objective
Probabilities for Unique Objects
Hasofer, A.M., July 1983 (Paper 4)
A framework for setting up objective probabilistic models
to deal with unique objects is proposed. The main ideas are:
a) Randomness is a property of the model, not of the object
under study; b) Following K.R. Popper, a model is termed
objective if it is falsifiable; c) The probability measure
in the model
need not be operationally defined; d) The model is deemed
falsified if an event of extremely low probability under
the model
occurs; e) The usefulness of a probabilistic model resides
in its ability to estimate potentially observable quantities
as a function of the given data. The probability parameters
must not appear in the final algorithm. The proposed framework
provides a rationale for using Bayesian decision theory
in the design of unique facilities, such as nuclear power
plant, dams or civil engineering structures design without
recourse to a subjectivist interpretation of probability.
On the Processing
of Doubtful Information: Part 1: General Theory
Rosenblueth, E., August 1983 (Paper 5)
Owing to inaccuracy or imprecision in measurements, to error,
or to insincerity, the opinions expressed by two or more
experts can differ; even those expressed by a singe expert
can differ from each other. In the framework of bayesian
statistics a method is developed for calculating the probability
that each of a set of hypotheses about the phenomenon in
question be true using the information previously available
about the witnesses and updating it as a function of the
statements uttered. In a parallel approach the paper also
deals with the distributions of the parameters of probability
distribution, including the case of outliers. A tool is thus
available for aggregating inconsistent information.
On the Processing
of Doubtful Information: Part 2: Gaussian Distributions
Rosenblueth, E., Ferregut, C., December 1983 (Paper 6)
A previously described bayesian method for calculating the
probability that each of a set of hypotheses about a phenomenon
be true is specialized for gaussian variables. A first group
of problems considers the data belongs either to a population
of valid values or a population of false values. The cases
of unknown mean and unknown mean and variance are analyzed.
A second group of problems considers the situation in which
the population of valid values consists of subpopulations.
The problem of outliers is studied in parallel, and several
sensitivity analyses are carried out.
Optimal Safety Levels Via Social Indicators
Lind., N.C., Nathwani, J.S., July 1992 (Paper
26)
The purpose of this paper is to show how quantitative criteria
within the context of an appropriate framework can be used
to guide risk management decisions. Social indicators are
statistics, time series that reflect some aspect of the quality
of life in a society or group of individuals. Development,
validation and use of social indicators is an important current
research activity. Social indicators serve to provide quantitative
measures for assessing the rationales and effectiveness of
public decision-making.
Resources and Environmental Policy
Narveson, J., December 1992 (Paper
30)
This paper is a partly empirical and mostly conceptual inquiry
into the notion of Resources. Current "Environmentalists" evidently
think of resources as natural, identifying them with quantities
of stuff. They suppose that such resources must be finite
in amount and therefore scarce. This way of thinking is argued
to be entirely wrong.
Risk-Benefit Balancing
in Risk Management: Measures of Benefits and Detriments
Nathwani, J.S., Lind, N.C., Siddall, E., March
1990 (Paper 18)
Improvements in risk management practices are possible on
the basis of a rational approach to comparisons of benefits
and detriments of a course of action and the alternatives
to that course of action. A conceptual framework within which
a systematic assessment of technology options are made in
such a way that all the important consequences, both direct,
indirect and the intangibles can be treated in a consistent
manner is proposed.
Risk and Its Metaphors
Whittaker, J., July 1994 (Paper
35)
This paper is not a scholarly dissertation on metaphor,
nor a report of extensive research. It is a speculative essay,
conjecture, presumption, an idea. 1. We cope with those things
we do not, and cannot, understand by metaphorically transforming
them into the world of the familiar. 2. The metaphors we
choose have a strong influence on how we think, and what
things we read are relevant. 3. In the area of risks analysis & assessment,
we have chosen inappropriate metaphors that are leading us
in non-productive directions. 4. Our present understanding
of elements of the risk situation is such that we should
be able to construct more productive metaphors.
Risks in Environmentalism - Comments on the Green Plan
Bennett, C.R., August 1992 (Paper
27)
This paper demonstrates that most environmental regulatory
proposals are based upon inadequate scientific knowledge.
In many cases they are firmly founded upon the wrong scientific
assumptions, particularly where public health is concerned.
Most of the work by scientists of Health & Welfare Canada
and in the U.S. appears to be ignored and resource is made
to 30 years old environmentalist dogma. This may serve a
political agenda but the economic effects are felt mostly
by the poor whose requirements often do not include environmental
contemplation.
Safety, Social Well-Being and Its Measurement
Nathwani, J.S., Lind, N.C., Siddall, E., December
1990 (Paper 21)
This paper is based on a summary of the results of a study
entitled "Management of Risks in The Public Interest:
A Study of the Social and Economic Impacts of Energy," by
N.C. Lind, J.S. Nathwani, E. Siddall. The study develops
the theme that the assessment of a project, or a major undertaking,
in the public interest ought to be guided by the principle
of maximizing the net benefit to society.
Smoking: Science,
Ethics and Action
Siddall, E., April 1988 (Paper 12)
One of the greatest risks to which the citizens of Canada
are now exposed results from smoking cigarettes. This article
attempts to analyze the situation and the problem and to
suggest what should be done.
Statistical Analysis
of Accident Rates for Large Trucks of Differing Configurations
Saccomanno, F.F., Read, S., November 1989 (Paper
16)
An analysis of factors affecting large truck accident rates
is presented. A series of GLIM loglinear models are calibrated
to measure the strength of association between accident rates
for different truck configurations and various road, vehicle
and driver characteristics. These models are calibrated based
on Ontario accident and exposure data for a four year period,
1983 to 1986.
Strategic Analysis of the Detroit Incinerator Conflict
Soltani, S., Shortreed, J.H., Hipel, K.W., June
1992 (Paper 25)
This paper studies the development of a dispute arising
over the construction and operation of a municipal waste
incinerator in Detroit, Michigan, using the Conflict Analysis
methodology (CA) developed by Fraser and Hipel as an extension
of Howards' metagame analysis. The methodology has been previously
applied to various real world problems such as military and
water allocation disputes.
Survival
Discount Rates
Needleman, L., July 1982 (Paper
1)
This paper discusses valuing changes in the risk of dying
in the near future (e.g. changes that follow from changing
lifestyles), finding the present value of changes in risk
spread over several years, the concept of the survival discount
rate, theoretical framework and empirical estimates of survival
discount rates.
The Unintended Social Risks of Nuclear Waste Disposal
Nathwani, J.S., March 1994 (Paper
34)
This paper discusses the issue of nuclear fuel waste disposal
and the perception of a wide spectrum of risks to individuals,
society and the environment. Although the spectrum is broad
and the duration of the potential radiological hazard long,
it is not to be thought that the risk is necessarily large
or is more uncertain than many other risks.
Transportation of Dangerous Goods: Some Policy Options
Shortreed, J.H., September 1985 (Paper 8)
It is estimated that the use and transport of dangerous
goods is increasing at 10-15% per year. This paper addresses
major risks of transportation issues. Policy issues of dangerous
goods movements are debated in the public forum, can be highly
emotional, are concerned with rare, but deadly events and
have significant implications for the economy. It is important
to understand the background to these factors and much of
this paper is directed to this task.
|