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Title: 2018 ASHRAE Student Design Competition: design calculations
Date: 2018-05-04
Description: This report is submitted by a team from British Columbia Institute of Technology for 2018 ASHRAE student design competition (Design Calculations). The objective of the competition is to perform the...
Show moreThis report is submitted by a team from British Columbia Institute of Technology for 2018 ASHRAE student design competition (Design Calculations). The objective of the competition is to perform the design calculations to correctly size the variable air volume HVAC system for a four-story, 70,000 ft2 mixed used complex north of Istanbul, Turkey near Arnavutkoy. The facility features retail, office spaces, a restaurant, and a hotel.
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Contributor(s): Abbasi, Harjanto, Chung, Cheung

Title: MECH 8290 - Capstone Project 2
Description: Capstone Project 2, Bachelor of Mechanical Engineering.

Title: Multi source heat pump for geoexchange systems (GXS)
Date: 2018
Description: With the use and effectiveness of conventional heat pumps decreasing drastically in colder climate regions, geo-exchange systems have become the solution to allow heat pumps to still be operable in...
Show moreWith the use and effectiveness of conventional heat pumps decreasing drastically in colder climate regions, geo-exchange systems have become the solution to allow heat pumps to still be operable in these colder regions. However, with the high costs of installation required for deep-well heat exchangers and horizontal-trench heat exchangers, and the high cost of land in high-density urban/suburban areas, their adoption is still small. For this reason, this project aims to increase the energy density of geo-exchange systems so that high installation costs are not required, and large land requirements become non-existent.
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Contributor(s): Rendina, Robinson, Jacobsohn, Cheung, Askari, Fourie

Title: Skateboard truck testing device
Date: 2018
Description: Skateboard trucks are one of the three major components that, when assembled together, make up a skateboard along with the skateboard deck and wheels. The truck connects the deck to the wheels and ...
Show moreSkateboard trucks are one of the three major components that, when assembled together, make up a skateboard along with the skateboard deck and wheels. The truck connects the deck to the wheels and translates the tilting motion of the deck to a turning motion of the truck to cause a turning response. As such, there is a relationship between how much the deck tilts to how much the trucks turn. Furthermore, the truck itself can come in varying sizes and configurations. The axle length, hardness of the bushings used and the angle that the truck sits on relative to the deck all can vary to provide a different feel and response for the rider of the skateboard. Although skateboards have been used since the early 1960’s, no device has been created to quantify the feel that skateboard riders feel with varying configurations of the truck. The purpose of this device is to provide quantitative data and results for each truck configuration tested so that the response of differing setups can be compared and provide valuable results for either riders or companies that design skateboard trucks.
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Contributor(s): Gill, Palma, Chawla, McMillan

Title: MATE 2018 ROV Competition
Date: 2018
Description: Deep Blue Marine Engineering (DBME) has developed an ROV that satisifies the design requirements outlined in the RFP submitted by the Applied Physics Laboratory (APL) at the University of Washingto...
Show moreDeep Blue Marine Engineering (DBME) has developed an ROV that satisifies the design requirements outlined in the RFP submitted by the Applied Physics Laboratory (APL) at the University of Washington. DBME’s Marauder was designed and built by a team of 4 mechanical engineering students from the British Columbia Institute of Technology (BCIT). Marauder was prototyped to perform tasks required for locating and recovering the engine of a vintage airplane, installing a seismometer, and installing a tidal turbine and instrumentation to monitor its marine environment. Marauder was intially prototyped at BCIT’s Burnaby campus before it underwent thorough and rigirous testing at the BCIT Marine Campus to ensure functionality and reliability when performing the required tasks. To complete the scope of work provided by the APL at the University of Washington, DBME was organized into mechanical and electrical design teams. A collaborative design approach between mechanical and electrical design teams was used to insure functionality and control of mission specific tooling during prototyping and testing. Marauder’s frame and tooling was precision manufactured using in-house equipment that includes a 3-axis CNC mill, a water jet cutter, and multiple 3D printers to insure component fitment and potential development of multiple prototypes. Furthermore, with the aid of precision manufacturing equipment, Marauder’s frame and tooling was also designed to meet the minimal size and weight requirements for ease of portability. The following technical document outlines the design process and results produced by BCIT Deep Blue Marine Engineering during the development and prototyping of Marauder.
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Contributor(s): Law, Miltimore, Murphy, Quisias, Niet

Title: Front-end wheelchair attachment analysis
Date: 2018
Description: The objective of this project is to develop a SolidWorks simulation model which reflects the same geometry as a physical model given by the sponsor, furthermore has the capability to conduct accura...
Show moreThe objective of this project is to develop a SolidWorks simulation model which reflects the same geometry as a physical model given by the sponsor, furthermore has the capability to conduct accurate static loading simulations. As well an objective is to conduct a static simulation stress study on the foot-peg of the wheelchair to simulate and determine the stresses that are formed by a 200lb load (mimicking a person) on the wheelchair while the front-end attachment is secured onto the foot-peg. To ensure the results gathered from simulations are correct, physical validation conducted using a strain gauge test and an analytical calculation were used to determine the stresses at a specified point. Using the simulation and two validation methods, an acceptable result for the stress at a specified location on the frame can be verified and analyzed. The purpose being to determine if the SolidWorks simulation model results at the same point can be validated by the physical and analytical.
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Contributor(s): Khatkar, Gridnev, Fourie

Title: Rexroth Bosch two axis servo trainer
Date: 2018
Description: This document is a final report on the fourth-year mechanical engineering Capstone project: Two-Axis Servo Trainer/Bolt Tightener. This report covers the project background, current status, theory,...
Show moreThis document is a final report on the fourth-year mechanical engineering Capstone project: Two-Axis Servo Trainer/Bolt Tightener. This report covers the project background, current status, theory, activities, results, and conclusions. The project was sponsored by Rexroth Bosch who provided the opportunity to two BCIT fourth-year mechanical Capstone groups. The project was to create a physical servo motor trainer for learning employees and clients. The mechanism must be based on a commonly automated industry task, require position, velocity, and torque control, and 2-axis synchronization.
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Contributor(s): Tarrant, Whaley, Ilchuk, Fourie

Title: Design and manufacture of an indoor paddleboard trainer
Date: 2018
Description: The project commissioned by DOS Watersports requires a development of a functional prototype of an indoor paddle board trainer. Some of the requirements for the paddle board trainer included inerti...
Show moreThe project commissioned by DOS Watersports requires a development of a functional prototype of an indoor paddle board trainer. Some of the requirements for the paddle board trainer included inertia and variable resistance. The scope of the project was focused solely on the paddle motion and not the user’s ability to balance on the paddle board. The form of resistance was open ended, as well as the budget for the paddle board trainer.
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Contributor(s): Kafeety, Pannu, Abbasi, Fourie

Title: 2018 ASHRAE Design Competition: HVAC design calculations
Date: 2018-05-04
Description: This report is prepared by mechanical engineering students from British Columbia Institution of Technology for 2018 ASHRAE Student Design Competition. The goal of this project is to design heating,...
Show moreThis report is prepared by mechanical engineering students from British Columbia Institution of Technology for 2018 ASHRAE Student Design Competition. The goal of this project is to design heating, ventilation, and air conditioning (HVAC) system for a 70,000 ft2, four story mixed use building in north of Istanbul, Turkey. The building contains retail spaces, a restaurant, office spaces, as well as hotel area. The design of the system is based on owner’s project requirement (OPR), complied with latest ASHRAE Standards 55, 62.1, 90.1, 189.1, and ASHRAE Handbooks with consideration of Turkey Building Codes. The HVAC design includes zoning, ventilation rate and load calculations, system selection, energy analysis and life cycle cost analysis over 50 year’s life of the facility.
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Contributor(s): Wang, Chao, Ghadiri, Almasyabi, Cheung, Poon, Li

Title: Boat stabilization (anti rocking) system
Date: 2018
Description: While on a ship of any size, it is desirable to have a stable deck to ensure maximum safety and enjoyment for passengers. Ships have normally relied upon the design of their hulls for stability. Ho...
Show moreWhile on a ship of any size, it is desirable to have a stable deck to ensure maximum safety and enjoyment for passengers. Ships have normally relied upon the design of their hulls for stability. However, even with a superior hull design, ships are incapable of completely mitigating such rolling motion. To reduce rolling motion further, an additional stabilization system must be implemented. This report documents the development of such a stabilization system in response to the request for proposal (RFP) received from WaterWorks Co. on October 17, 2017.
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Contributor(s): Friesen, Nicholson, Estabrook, King

Title: Dynamic plan management in the context of a recognized air picture
Date: 2007-12-07
Description: This document surveys existing literature on dynamic plan management and describes the development of a prototype Air Force plan management system. The literature survey presents short summaries of...
Show moreThis document surveys existing literature on dynamic plan management and describes the development of a prototype Air Force plan management system. The literature survey presents short summaries of a wide range of research papers, as well as a synthesis and analysis of existing approaches. The detailed comparison of existing approaches is used to formulate a specific methodology for the development of software for plan representation, plan forecasting/projection, plan analysis/evaluation and plan monitoring. The proposed methodology involves the development of a precise ontology of plan elements for plan representation. This representation removes ambiguity in the description of plans, facilitates automated analysis of plans, and also permits several different approaches to plan visualization. The implemented prototype software defines an ontology that provides a suitable internal representation of plans, along with basic plan validation capabilities. It also provides a map-based graphical user interface to visualize plans. The use of the software is demonstrated in the context of a combat search and rescue vignette. The findings conclude that the prototype demonstrates the overall utility of the approach, although further development is required to provide more detailed analysis, as well as additional visualization methods.
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Contributor(s): Hunter, Happe, Dutkiewicz

Title: Modelling cryptographic protocols in a theory of action
Date: 2009-05-26
Description: Proceedings of the Ninth International Symposium on Logical Formalizations of Commonsense Reasoning, Toronto, ON, June 1-3, 2009. This paper proposes a framework for analysing cryptographic protoco...
Show moreProceedings of the Ninth International Symposium on Logical Formalizations of Commonsense Reasoning, Toronto, ON, June 1-3, 2009. This paper proposes a framework for analysing cryptographic protocols by expressing message passing and possible attacks as a situation calculus theory. While cryptographic protocols are usually quite short, they are nonetheless notoriously difficult to analyse, and are subject to subtle and nonintuitive attacks. Our thesis is that in previous approaches for expressing protocols, underlying domain assumptions and capabilities of agents are left implicit. We propose a declarative specification of such assumptions and capabilities in the situation calculus. A protocol is then compiled into a sequence of actions to be executed by the principals. A successful attack is an executable plan by an intruder that compromises the stated goal of the plan. We argue that not only is a full declarative specification necessary, it is also much more flexible than previous approaches, permitting among other things interleaved runs of different protocols and participants with varying abilities.
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Contributor(s): Hunter, Delgrande, Grote

Title: Belief modeling for maritime surveillance
Date: 2009-08-18
Description: Proceedings of 12th International Conference on Information Fusion, 2009, FUSION '09 in Seattle, WA, USA, 6-9 July 2009. In maritime surveillance, the volume of information to be processed is very ...
Show moreProceedings of 12th International Conference on Information Fusion, 2009, FUSION '09 in Seattle, WA, USA, 6-9 July 2009. In maritime surveillance, the volume of information to be processed is very large and there is a great deal of uncertainty about the data. There are many vessels at sea at every point in time, and the vast majority of them pose no threat to security. Sifting through all of the benign activity to find unusual activities is a difficult problem. The problem is made even more difficult by the fact that the available data about vessel activities is both incomplete and inconsistent. In order to manage this uncertainty, automated anomaly detection software can be very useful in the early detection of threats to security. This paper introduces a high-level architecture for an anomaly detection system based on a formal model of beliefs with respect to each entity in some domain of interest. In this framework, the system has beliefs about the intentions of each vessel in the maritime domain. If the vessel behaves in an unexpected manner, these intentions are revised and a human operations centre worker is notified. This approach is flexible, scalable, and easily manages inconsistent information. Moreover, the approach has the pragmatic advantage that it uses expert information to inform decision making, but the required information is easily obtained through simple ranking exercises.
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Contributor(s): Hunter

Title: On the representation and verification of cryptographic protocols in a theory of action
Date: 2010-09-30
Description: Proceedings of 2010 Eighth Annual International Conference on Privacy Security and Trust (PST) in Ottawa, ON, Canada, 17-19 Aug. 2010. Cryptographic protocols are usually specified in an informal, ...
Show moreProceedings of 2010 Eighth Annual International Conference on Privacy Security and Trust (PST) in Ottawa, ON, Canada, 17-19 Aug. 2010. Cryptographic protocols are usually specified in an informal, ad hoc language, with crucial elements, such as the protocol goal, left implicit. We suggest that this is one reason that such protocols are difficult to analyse, and are subject to subtle and nonintuitive attacks. We present an approach for formalising and analysing cryptographic protocols in a theory of action, specifically the situation calculus. Our thesis is that all aspects of a protocol must be explicitly specified. We provide a declarative specification of underlying assumptions and capabilities in the situation calculus. A protocol is translated into a sequence of actions to be executed by the principals, and a successful attack is an executable plan by an intruder that compromises the specified goal. Our prototype verification software takes a protocol specification, translates it into a high-level situation calculus (Golog) program, and outputs any attacks that can be found. We describe the structure and operation of our prototype software, and discuss performance issues.
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Contributor(s): Hunter, Delgrande, Grote

Title: Arbitrary announcements in propositional belief revision
Date: 2015-07-27
Description: Proceedings of the International Workshop on Defeasible and Ampliative Reasoning (DARe-15) in Buenos Aires, Argentina, July 27, 2015. Public announcements cause each agent in a group to modify thei...
Show moreProceedings of the International Workshop on Defeasible and Ampliative Reasoning (DARe-15) in Buenos Aires, Argentina, July 27, 2015. Public announcements cause each agent in a group to modify their beliefs to incorporate some new piece of information, while simultaneously being aware that all other agents are doing the same. Given some fixed goal formula, it is natural to ask if there exists an announcement that will make the formula true in a multi-agent context. This problem is known to be undecidable in a general modal setting, where the presence of nested beliefs can lead to complex dynamics. In this paper, we consider not necessarily truthful public announcements in the setting of propositional belief revision. We are given a goal formula for each agent, and we are interested in finding a single announcement that will make each agent believe the corresponding goal following AGM-style belief revision. If the goals are inconsistent, then this can be seen as a form of ampliative reasoning. We prove that determining if there is an arbitrary public announcement in this setting is not only decidable, but that it is simpler than the corresponding problem in the most simplified modal logics. Moreover, we argue that propositional announcements and beliefs are sufficient for modelling many practical problems, including simple robot controllers.
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Contributor(s): Hunter, Schwarzentruber

Title: Trust-sensitive belief revision
Date: 2015
Description: Proceedings of the Twenty-Fourth International Joint Conference on Artificial Intelligence in Buenos Aires, Argentina, 25–31 July 2015. Belief revision is concerned with incorporating new informati...
Show moreProceedings of the Twenty-Fourth International Joint Conference on Artificial Intelligence in Buenos Aires, Argentina, 25–31 July 2015. Belief revision is concerned with incorporating new information into a pre-existing set of beliefs. When the new information comes from another agent, we must first determine if that agent should be trusted. In this paper, we define trust as a pre-processing step before revision. We emphasize that trust in an agent is often restricted to a particular domain of expertise. We demonstrate that this form of trust can be captured by associating a state partition with each agent, then relativizing all reports to this partition before revising. We position the resulting family of trust-sensitive revision operators within the class of selective revision operators of Ferme and Hansson, and we examine its properties. In particular, we show how trust-sensitive revision is manipulable, in the sense that agents can sometimes have incentive to pass on misleading information. When multiple reporting agents are involved, we use a distance function over states to represent differing degrees of trust; this ensures that the most trusted reports will be believed.
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Contributor(s): Hunter, Booth

Title: Belief change with uncertain action histories
Date: 2015-08
Description: We consider the iterated belief change that occurs following an alternating sequence of actions and observations. At each instant, an agent has beliefs about the actions that have occurred as well ...
Show moreWe consider the iterated belief change that occurs following an alternating sequence of actions and observations. At each instant, an agent has beliefs about the actions that have occurred as well as beliefs about the resulting state of the world. We represent such problems by a sequence of ranking functions, so an agent assigns a quantitative plausibility value to every action and every state at each point in time. The resulting formalism is able to represent fallible belief, erroneous perception, exogenous actions, and failed actions. We illustrate that our framework is a generalization of several existing approaches to belief change, and it appropriately captures the non-elementary interaction between belief update and belief revision.
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Contributor(s): Hunter, Delgrande

Title: Ordinal conditional functions for nearly counterfactual revision
Date: 2016
Description: Proceedings of the 16th International Workshop on Non-Monotonic Reasoning (NMR 2016), Cape Town, South Africa; April 22-24, 2016. We are interested in belief revision involving conditional statemen...
Show moreProceedings of the 16th International Workshop on Non-Monotonic Reasoning (NMR 2016), Cape Town, South Africa; April 22-24, 2016. We are interested in belief revision involving conditional statements where the antecedent is almost certainly false. To represent such problems, we use Ordinal Conditional Functions that may take infinite values. We model belief change in this context through simple arithmetical operations that allow us to capture the intuition that certain antecedents can not be validated by any number of observations. We frame our approach as a form of finite belief improvement, and we propose a model of conditional belief revision in which only the "right" hypothetical levels of implausibility are revised.
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Contributor(s): Hunter

Title: CAD-CAM applications for spinal orthotics: a preliminary investigation
Date: 1990
Description: In the summer of 1988, a joint study was done by the Prosthetics and Orthotics Department at the British Columbia Institute of Technology and the Medical Engineering Resource Unit (MERU) of the Uni...
Show moreIn the summer of 1988, a joint study was done by the Prosthetics and Orthotics Department at the British Columbia Institute of Technology and the Medical Engineering Resource Unit (MERU) of the University of British Columbia. The study was undertaken to determine the feasibility of applying existing Computer Aided Design-Computer Aided Manufacture (CAD-CAM) techniques to the design and manufacture of spinal orthoses. The orthosis design selected was a TLSO for the treatment of a non-structural curve of the spine. The results of the study were very promising. This paper describes the study and discusses the results.
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Contributor(s): Raschke, Bannon, Saunders, McGuiness

Title: A functional task analysis and motion simulation for the development of a powered upper-limb orthosis
Date: 1994-09
Description: Describes research work directed towards the development and application of a design methodology to determine the optimal configuration of a powered upper-limb orthosis. The design objective was to...
Show moreDescribes research work directed towards the development and application of a design methodology to determine the optimal configuration of a powered upper-limb orthosis. The design objective was to minimize the orthosis complexity, defined as the number of degrees of freedom, while maintaining the ability to perform specific tasks. This objective was achieved in three stages. First, potential users of a powered orthosis were interviewed to determine their priority tasks. Secondly, the natural arm motions of able-bodied individuals performing the priority tasks were profiled using a video tracking system. Finally, a kinematic simulation algorithm was developed and employed in order to evaluate whether a proposed orthosis configuration could perform the priority tasks. The research results indicate that task functionality is overly compromised for orthosis configurations with less than five degrees of freedom, plus prehension. Acceptable task performance, based on the specific priority tasks considered, was achieved in the simulations of two different orthosis configurations with five degrees of freedom. In the first design option, elevation (rotation about a horizontal axis through the shoulder) and radial/ulnar deviation are fixed, while in the second option wrist flexion and radial/ulnar deviation are fixed. A prototype orthosis is currently being developed using the first design option.
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Contributor(s): Raschke, Romilly, Anglin, Gosine, Hershler

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