Jason Boyd Morrison

Jason Boyd Morrison
University of Manitoba | UMN · Department of Biosystems Engineering

PhD Carleton University 2002

About

76
Publications
10,064
Reads
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2,480
Citations
Citations since 2017
11 Research Items
956 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Additional affiliations
January 2020 - present
University of Manitoba
Position
  • Professor (Assistant)
July 2002 - December 2005
Carleton University
Position
  • Instructor

Publications

Publications (76)
Article
Understanding the movement and distribution of insects inside a grain bin is crucial to develop an effective stored grain management protocol. The three-dimensional movement and distribution of adult Cryptolestes ferrugineus (Stephens) at 20 and 30°C were determined in a 0.7 × 0.7 × 0.7 m3 (internal dimensions) wooden box filled with wheat of unifo...
Article
Full-text available
The agriculture industry experiences severe economic losses each year due to infection of cereal crops with Fusarium, often leading to contamination with the secondary metabolite mycotoxin Deoxynivalenol (DON). Timely detection of Fusarium Damaged Kernels (FDK) could provide producers with an opportunity to develop and implement mitigation strategi...
Article
Mechanical damage of seeds during harvesting and postharvest handling affects their germinability, which directly impacts crop yield. The feasibility of near-infrared (NIR) hyperspectral imaging technique was studied to predict the germinability of soybeans in a rapid and non-destructive way. Soybean seeds were artificially damaged using an impact...
Article
Survey data suggests that in Western Canada, approximately 62% of forage samples may not meet energy requirements for gestating beef cows in 2nd trimester of pregnancy. Individual supplementation via a precision feeder would improve animal productivity and welfare. A CV of 30% was selected as a threshold for acceptable variation based on previous s...
Article
Full-text available
Due to the excessive use of water required for cotton cultivation, scientists in this field have been looking at waste biomass as an alternative source of fiber supply. Canola waste biomass is a source of textile fibers which effectively costs nothing, as the biomass can be collected from the waste plant stems of canola plants after harvesting. The...
Article
Given a set P = {p1,.,pn} of points and a point q in the plane, we define a function (q) that provides a combinatorial characterization of the multiset of values {|PHi|}, where for each i {1,.,n}, Hi is the open half-plane determined by q and pi. We introduce two new natural measures of depth, perihedral depth and eutomic depth, and we show how to...
Article
Full-text available
Falls and near-falls from tractors during ingress and egress are a health hazard that researchers should work to prevent. To gain an understanding of the factors contributing to such falls, a pilot study was completed in which kinematic analysis of tractor egress was performed using three individuals whose heights represent 5th, 50th and 95th popul...
Article
We have used thermal source Fourier Transform Infrared (FTIR) microtomographic imaging to compare sea ice diatoms growing under different light conditions. A prototype tomography accessory was designed to have sufficient degrees of freedom to align any tilted cylindrical sample relative to the axis of rotation, minimizing the off-axis path traced d...
Article
Decorticated flax contains a significant amount of shive, which limits applications of flax fiber. Separation of shive from flax fiber is essential to improve the resulting product’s quality. The intention of this study was to use the pneu- matic method for separation of flax fiber from shive. Differences between the terminal velocities of flax fib...
Article
Near infrared (NIR) hyperspectral imaging (HSI) has established itself as a powerful non-destructive tool for the chemical analysis of heterogeneous samples. However, one of the main disadvantages of NIR HSI is that the technique suffers from instrumentation-related problems, which in turn affect the acquired images. In general, focal plane array (...
Article
Needle-free injection devices improve vaccinator safety and optimise vaccine delivery time by eliminating the use of needles involved with traditional vaccination techniques. Of significant importance is a full understanding of the relationships that exist between the injection properties and the depth and shape of the injectate's dispersion. Work...
Article
Full-text available
This study compared needle-free and needle-based injection devices for vaccination of calves against Clostridium chauvoei in warm and cold conditions. Both devices elicited comparable antibody responses in calves. Needle-free injection devices can be used to vaccinate calves provided appropriate precautions are taken in cold weather.
Article
Full-text available
A recent upgrade to the optics configuration of our thermal source FTIR microscope equipped with a 64×64 focal plane array detector has enabled rapid acquisition of high magnification spectrochemical images, in transmission, with an effective geometric pixel size of ~1×1 μm2 at the sample plane. Examples include standard imaging targets for scale a...
Article
A repeatable method for in vivo and in vitro measurement of polyethylene wear in total knee replacement (TKA) is needed. This research examines the Model-based radiostereometric analysis’ (MBRSA) in vitro precision under different patient-radiograph orientations and flexion angles of the knee using a TKA phantom. Anterior-posterior and medial-later...
Article
In this paper we present a novel nonparametric method for simplifying piecewise linear curves and we apply this method as a statistical approximation of structure within sequential data in the plane. Specifically, given a sequence P of n points in the plane that determine a simple polygonal chain consisting of n-1 segments, we describe algorithms f...
Conference Paper
This study was conducted to compare the effectiveness of a needle-free (NF) injection device and needle syringe (NS) when used to vaccinate two-month old calves against infectious bovine rhinotracheitis (IBR) and Clostridium chauvoei. Two independent trials were conducted in the spring and fall with 96 crossbred beef calves (106.24 ± 16.68 kg) and...
Conference Paper
This study was conducted to compare the effectiveness of a needle-free (NF) injection device and needle syringe (NS) when used to vaccinate two-month old calves against infectious bovine rhinotracheitis (IBR) and Clostridium chauvoei. Two independent trials were conducted in the spring and fall with 96 crossbred beef calves (106.24 ± 16.68 kg) and...
Conference Paper
This paper describes the process that has been implemented for continual improvement of the Engineering programs at the University of Manitoba. The continuous improvement process developed is founded on: (i) assessment of graduate attributes, (ii) evaluation of student success, and (iii) further improvement of the programs. Graduate attributes are...
Article
The Twenty-Second Annual Canadian Conference on Computational Geometry (CCCG 2010) was held at the University of Manitoba in Winnipeg, Canada, from August 9-11, 2010, and co-chaired by Stephane Durocher and Jason Morrison. This was the first time this conference was hosted in the province of Manitoba. As in previous years, the focus of the conferen...
Conference Paper
Full-text available
We introduce the exact coloured κ-enclosing object problem: given a set P of n points in R2, each of which has an associated colour in {1, . . . , t}, and a vector c = (c1, . . . , ct), where ci ε Z+ for each 1 ≤ i ≤ t, find a region that contains exactly ci points of P of colour i for each i. We examine the problems of finding exact coloured κ-enc...
Conference Paper
In this study, antibody response was measured in calves following vaccination against bovine viral diarrhea virus (BVDV) using either needle-free (Pulse 250) or needle-syringe (NS) vaccination techniques. The Pulse 250 needle-free (NF) injection device utilizes compressed carbon dioxide to power vaccine injections. At 2 mo of age (d 0), calves were...
Article
Full-text available
With the approach of the accreditation visit by the Canadian Engineering Accreditation Board, it falls to the faculties and departments to interpret, understand and transition into use the latest accreditation criterion on graduate attributes. Over the past two years Biosystems has utilized our small size to perform several preparatory exercises to...
Article
Full-text available
In response to student interest in the broad field of biomedical engineering, theDepartment of Biosystems Engineering has developed three technical electives that now form the core of a Biomedical Specialization that is available to students in the Biosystems Engineering program at the University of Manitoba. These courses have been designed to hel...
Article
Full-text available
The University of Manitoba (U. of M.) 2011-12 curriculum has a new introductory programming/computer science course specifically for current or future engineering students. This course focuses on teaching fundamentals of programming and computer science through mathematical computation using Python. The need for this course came from a grass roots...
Conference Paper
In this paper we present a novel nonparametric method for simplifying piecewise linear curves and we apply this method as a statistical approximation of structure within sequential data in the plane. We consider the problem of minimizing the average length of sequences of consecutive input points that lie on any one side of the simplified curve. Sp...
Conference Paper
Full-text available
We consider range queries in arrays that search for low-frequency elements: least frequent elements and α-minorities. An α-minority of a query range has multiplicity no greater than an α fraction of the elements in the range. Our data structure for the least frequent element range query problem requires O(n) space, O(n 3/2) preprocessing time, and...
Article
The dietary intake of polyunsaturated fatty acids (PUFAs), e.g., docosahexaenoic acid, eicosapentaenoic acid and arachidonic acid, is reflected in the biochemical makeup of tissues. In the course of analyzing mouse retina and brain tissue with Fourier Transform infrared (FTIR) microspectroscopy, we discovered that special considerations are require...
Poster
Full-text available
This research focuses on impacts of hammers by people performing a simulated surgical task. Unlike traditional materials testing or manufacturing methods where parts are easily held, pressed and assembled, arthroplasty and orthopaedic surgery necessarily requires that “press-fit” pieces be implanted using hammer blows. The objective of this paper i...
Article
Full-text available
A mode of a multiset $S$ is an element $a \in S$ of maximum multiplicity; that is, $a$ occurs at least as frequently as any other element in $S$. Given a list $A[1:n]$ of $n$ items, we consider the problem of constructing a data structure that efficiently answers range mode queries on $A$. Each query consists of an input pair of indices $(i, j)$ fo...
Article
Full-text available
Maps and mapping tools through geographic information systems (GIS) are highly valuable for turning data into useful information that can help inform decision-making and knowledge translation (KT) activities. However, there are several challenges involved in incorporating GIS applications into the decision-making process. We highlight the challenge...
Article
Full-text available
Local Ontario Early Years Centres (OEYCs) collect timely and relevant local data, but knowledge translation is needed for the data to be useful. Maps represent an ideal tool to interpret local data. While geographic information system (GIS) technology is available, it is less clear what users require from this technology for evidence-informed progr...
Article
We develop a number of space-efficient tools including an approach to simulate divide-and-conquer space-efficiently, stably selecting and unselecting a subset from a sorted set, and computing the kth smallest element in one dimension from a multi-dimensional set that is sorted in another dimension. We then apply these tools to solve several geometr...
Article
Full-text available
Organizations that collect substantial data for decision-making purposes are often characterized as being 'data rich' but 'information poor'. Maps and mapping tools can be very useful for research transfer in converting locally collected data into information. Challenges involved in incorporating GIS applications into the decision-making process wi...
Conference Paper
Full-text available
We consider the problem of determining the placement of a star R on a set P of n points in the plane such that a given objective function is maximized. A star R is a set of m rays {r1,...,rm} in R 2 , emanating from a point p such that the angle between two consecutive rays is 2 m . A cone defined by two consecutive rays is c-occupied if it contain...
Conference Paper
Full-text available
Given a simple polygon P with m vertices and a set S of n points in the plane, we consider the problem of finding a rigid motion placement of P that contains the maxi- mum number of points in S. We present two solutions to this problem that represent time versus space trade- o! s. The first algorithm runs in O(n3m3) expected time using O(n2m2) spac...
Article
Full-text available
Digital near infrared (NIR) imaging of biological subjects is an increasingly important aspect of food quality inspection and bio-security in general. Digital NIR sensors, usually focal plane arrays, are known to have non-uniform sensitivity from pixel to pixel arising from detector manufacturing issues, operational conditions and design limitation...
Article
Full-text available
Distortions of an image in an optical imaging system due to differing indices of refraction for each wavelength of light are categorized as chromatic aberration (CA). Different magnifications at each wavelength result in geometric distortion of images known as Lateral Chromatic Aberration (LCA), while differing focal planes result in blurring of sp...
Article
This study addresses two objectives: (1) to develop a formal method of optimally locating a dense network of air pollution monitoring stations; and (2) to derive an exposure assessment model based on these monitoring data and related land use, population, and biophysical information. Previous studies have located monitors in an ad hoc fashion, favo...
Article
The development of models to assess air pollution exposures within cities for assignment to subjects in health studies has been identified as a priority area for future research. This paper reviews models for assessing intraurban exposure under six classes, including: (i) proximity-based assessments, (ii) statistical interpolation, (iii) land use r...
Article
Full-text available
We consider the problem of placing a star ~ R on a set S
Article
A space-efficient algorithm is one in which the output is given in the same location as the input and only a small amount of additional memory is used by the algorithm. We describe four space-efficient algorithms for computing the convex hull of a planar point set.
Article
Bloom filters are a randomized data structure for membership queries dating back to 1970. Bloom filters sometimes give erroneous answers to queries, called false positives. Bloom analyzed the probability of such erroneous answers, called the false-positive rate, and Bloom's analysis has appeared in many publications throughout the years. We show th...
Article
In this paper we propose to model a simplified wood shop. Following the work of Demaine, Demaine and Kaplan in [1] we limit the cutting tools of our carpenter to a circular saw. We extend that previous work to include a model of basic rules of carpentry and joinery. This model is then applied to the problem of building a polygon P by joining togeth...
Article
We consider the problem of translating a (finite or infinite) squoxe grid G over a set S of n points in the plane in order to maximize some objective function. We say that a grid cell is k-occupied if it contains k or more points of S. The main set of problems we study have to do with translating an infinite grid so that the number of k-occupied ce...
Conference Paper
Full-text available
We consider the problem of placing a regular grid over a set of points in order to minimize (or maximize) the number of grid cells not containing any points. We give an O(n log n) time and O(n) space algorithm for this problem. As part of this algorithm we develop a new data structure for solving a problem on intervals that is interesting in its ow...
Conference Paper
Full-text available
An in-place algorithm is one in which the output is given in the same location as the input and only a small amount of additional memory is used by the algorithm. In this paper we describe three in-place algorithms for computing the convex hull of a planar point set. All three algorithms are optimal, some more so than others.
Article
We study the problem of building a polygon P by gluing together strips of wood and cutting them with a circular saw. 1 Introduction Demaine, Demaine and Kaplan [4] study the problem of cutting a polygon P from a convex polygon Q that contains P using a circular saw. In their model, a circular saw is represented by a line segment of positive length...
Conference Paper
Full-text available
We consider the problem of placing a regular grid over a set of points in order to minimize (or maximize) the number of grid cells not containing any points. We give an O(n log n) time and O(n) space algorithm for this problem. As part of this algorithm we develop a new data structure for solving a problem on intervals that is interesting in its ow...
Article
Full-text available
. Compared with natural systems, Genetic Algorithms have a limited adaptive capacity, i.e. they get quite frequently trapped at local optima and they are poor at tracking moving optima in dynamic environments. This paper describes a general, formal model of co-evolution, the Linear Model of Symbiosis, that allows for the concise, unified expression...
Article
Full-text available
Genetic Algorithms (GAs) are a fast, efficient optimization technique capable of tackling many problems. Unfortunately the primary flaw of GAs is their constant drive toward a population containing a single local optima. This constant decay in the genetic diversity of the population decreases the GAs' capacity to find global optima and/or to adjust...
Article
Full-text available
. This paper introduces a framework of consistent concepts and definitions needed in the study of co-evolution. Drawing on previous work in Ecology, Evolution and Evolutionary Algorithms we present the basic forms of symbiotic relationships. Finally, we present a systematic approach to co-evolution that allows concise and unified expression of all...
Conference Paper
Full-text available
This paper presents a systematic approach to co-evolution that allows concise and unified expression of all types of symbiotic relationships studied in ecology. The resulting Linear Model of Symbiosis can be easily added to any regular Genetic Algorithm. Our model helps prevent premature convergence to a local optimum by maintaining the genetic div...
Article
Full-text available
A space-ecient algorithm is one in which the output is given in the same location as the input and only a small amount of additional memory is used by the algorithm. We describe four space-ecient algorithms for computing the convex hull of a planar point set.

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Projects

Projects (9)
Archived project
Assess advances in instrumentation and assist in methodological development to apply bench, thermal source FTIR spectromicroscopy to biological samples.
Archived project
To develop an operations research methodology to determine locations of pollution monitoring stations, specifically NOx and particulate emissions from vehicle traffic.
Archived project
To study different models of co-evolution and develop a methodology for implementing them into genetic algorithms.