Systems Thinking - Unit 3

Systems Thinking - Unit 3

Systems Thinking Modeling a System A simple example of a dynamic system a bathtub The balance between the inflow through the faucet and the outflow through the drain determines how much water accumulates in the tub. Is this system open or closed? Examples in the Earth System Inflow (runoff, precipitation)

Outflow (stream outlet) Reservoir (pond) https://en.wikipedia.org/wiki/Alpine_Lakes_Wilderness#/media/File:Lila_Lake_26527.JPG Examples in the Earth System Inflow (snowfall) Outflow (melting, icebergs)

Reservoir (glacier) http://cdn.antarcticglaciers.org/wp-content/uploads/2012/08/fs20093046_fig03.pn Examples in the Earth System Respiration and Decomposition Atmospheric CO Photosynthesis 2 760 Gton(C) 60 Gton(C)/year

60 Gton(C)/year Outflow Reservoir (atmosphere) Outflow Examples in society Inflow (entrance) Outflow (exit)

Reservoir (parking lot) https://en.wikipedia.org/wiki/ Parking_lot#/media/ File:P3030027ParkingLot_wb.jp g Examples in society $

$ Inflow (income) Outflow (spending) Reservoir (Bank account) https://openclipart.org/detail/231056/bank Why use a systems model?

Systems diagrams are useful for showing relationships in a system: Bathtub Systems models are useful for quantifying relationships in a system, and allowing system behavior to be explored experimentally: 10 liters 1 liter/minute

1 liter/minute Systems model of the bathtub STELLA is a software package that allows the user to build icon-based dynamical systems models The goal is to take the systems diagram of a bathtub and simulate in a STELLA model A STELLA model of the bathtub system includes a reservoir for the bathtub, and two flows that represent the faucet and drain Inflow

Reservoir Outflow Unit 3 Bathtub Model Model: icon-based representation of the system Equation: mathematical representation of the system STELLA does the calculations for us Output: graph of the system model output

as it runs - in this case, the change in the water in bathtub with time Systems modeling The bathtub model is simple enough that we could just do the calculation of flows and reservoir size with each time step by hand BUT, when a system is more complicated, a systems model becomes necessary to keep track of everything For example, below is a systems model for the Earths energy balance (i.e., inflow of energy from the Sun, the Earth reservoir of energy, and outflow of energy back to space)

Inflow Reservoir Outflow

Recently Viewed Presentations

  • Peripheral nerve (Lower extremity) Yohei Harada, PGY2 Neurology

    Peripheral nerve (Lower extremity) Yohei Harada, PGY2 Neurology

    Let's create a case. This is a sciatic neuropathy case. A 52 yo woman was referred for evaluation of 6 months history of left foot drop. She initially felt numbness over ( where?
  • Aucun titre de diapositive - gongkong

    Aucun titre de diapositive - gongkong

    Company Information Located in Henderson WA Australia Today is the worlds largest builder of fast ferries Manufacture the following vessels Passenger Ferries 24 to 48 meter 100 to 520 people 30 to 40 knots Vehicle and Passenger ferries 48 to...
  • Bild 1 - WordPress.com

    Bild 1 - WordPress.com

    I dag finns det en mängd olika tester att välja. Att kunna avgöra vilka tester som är bra för just min idrott kan vara skillnad mellan en lyckad idrottssatsning och fiaskot. * * Bild 2 Utan tester kan vi inte...
  • A Provenance Framework to Capture, Store, Query, and

    A Provenance Framework to Capture, Store, Query, and

    Arial MS Pゴシック Century Gothic Times New Roman Garamond Symbol ヒラギノ角ゴ Pro W3 Blank Presentation Microsoft Excel Chart PowerPoint Presentation Scientific Workflows Provenance PowerPoint Presentation Conventional Provenance Models Challenges in Modeling Provenance Unified ...
  • Goods and Service Tax

    Goods and Service Tax

    D. Any change in the cost accounting principles and methods applied for the measurement and assignment of the administrative overheads during the period covered by the cost statement which has a material effect on the administrative overheads shall be disclosed...
  • CHAPTER 16 The Research Report Copyright  2017 Pearson

    CHAPTER 16 The Research Report Copyright 2017 Pearson

    Letter/Memo of Transmittal: the letter of transmittal is used to release or deliver the document to an organization for which you are mot a regular employee. The memo of transmittal is used to deliver the document within your organization.--
  • Stakeholder Dialouge Session

    Stakeholder Dialouge Session

    Stan Holder (Wichita and Affiliated Tribes), Special Assistant to the Deputy Director (ABQ) ... Gil Vigil, Southwest Region. Brandon Stevens, Midwest Region. Lana Redeye, Eastern Region. Alberta Friday, Northwest Region. Russell Bradley, Four Tribes of Kansas.
  • Dying to Ask for Help: An Overlooked Crisis

    Dying to Ask for Help: An Overlooked Crisis

    Michael A. Lindsey, PhD, MSW, MPH. Executive Director, NYU McSilver Institute for Poverty Policy and Research. NYU Silver School of Social Work. Aspen Health Innovator Fellow, The Aspen Institute