, but this code // executes before the first paint, when

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is not yet present. The // classes are added to so styling immediately reflects the current // toolbar state. The classes are removed after the toolbar completes // initialization. const classesToAdd = ['toolbar-loading', 'toolbar-anti-flicker']; if (toolbarState) { const { orientation, hasActiveTab, isFixed, activeTray, activeTabId, isOriented, userButtonMinWidth } = toolbarState; classesToAdd.push( orientation ? `toolbar-` + orientation + `` : 'toolbar-horizontal', ); if (hasActiveTab !== false) { classesToAdd.push('toolbar-tray-open'); } if (isFixed) { classesToAdd.push('toolbar-fixed'); } if (isOriented) { classesToAdd.push('toolbar-oriented'); } if (activeTray) { // These styles are added so the active tab/tray styles are present // immediately instead of "flickering" on as the toolbar initializes. In // instances where a tray is lazy loaded, these styles facilitate the // lazy loaded tray appearing gracefully and without reflow. const styleContent = ` .toolbar-loading #` + activeTabId + ` { background-image: linear-gradient(rgba(255, 255, 255, 0.25) 20%, transparent 200%); } .toolbar-loading #` + activeTabId + `-tray { display: block; box-shadow: -1px 0 5px 2px rgb(0 0 0 / 33%); border-right: 1px solid #aaa; background-color: #f5f5f5; z-index: 0; } .toolbar-loading.toolbar-vertical.toolbar-tray-open #` + activeTabId + `-tray { width: 15rem; height: 100vh; } .toolbar-loading.toolbar-horizontal :not(#` + activeTray + `) > .toolbar-lining {opacity: 0}`; const style = document.createElement('style'); style.textContent = styleContent; style.setAttribute('data-toolbar-anti-flicker-loading', true); document.querySelector('head').appendChild(style); if (userButtonMinWidth) { const userButtonStyle = document.createElement('style'); userButtonStyle.textContent = `#toolbar-item-user {min-width: ` + userButtonMinWidth +`px;}` document.querySelector('head').appendChild(userButtonStyle); } } } document.querySelector('html').classList.add(...classesToAdd); })(); Matthew Heun | 黄大仙高手论坛

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Dr. Matthew Heun

Professor
Engineering

Biography

After completing his Ph.D., Dr. Heun worked at NASA鈥檚 Jet Propulsion Laboratory (JPL), Pasadena, CA, where he led studies and experiments related to planetary exploration with balloon systems. After working at JPL, Dr. Heun joined Global Aerospace Corporation (GAC), a start-up aerospace R&D company, as its first full-time employee. At GAC, Dr. Heun proposed, led, and completed several projects in support of NASA鈥檚 Earth Science activities. Dr. Heun spent his 2009 sabbatical in South Africa at the and the where he taught and participated in sustainable energy development.

 

Read Professor Heun's News & Stories  (August 8, 2008)

Education

Ph.D. in Mechanical Engineering, University of Illinois, 1995

Dr. Heun graduated from Calvin with a BSE in 1989. He completed is M.S. in Mechanical Engineering in 1990 and finished his Ph.D. in 1995, both at the University of Illinois. During that time, he worked as a research assistant in the Air Conditioning and Refrigeration Center (ACRC) at the University of Illinois. His work at the ACRC focused on the optimization of heat exchangers using ozone-friendly refrigerants.

 

Academic Interests

  • Impact of Energy Return on Investment (EROI) on energy prices
  • Sustainable Development in the Developing World Context
  • Renewable Energy Systems
  • Lithium-ion battery performance modeling for space applications
  • Balloon and lighter-than-air vehicle system design and optimization
  • Biological analogs for robotic group behavior
  • Passive trajectory control for stratospheric balloon systems
  • Thermal systems optimization
  • Survivable systems for planetary exploration

Publications

beyondgdp

Beyond GDP

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A Framework for Sustainability Thinking

BeyondStewardship_6x9_300dpi

Beyond Stewardship

Research and Scholarship

research1

Internet of Things Meets Building Energy Efficiency

<p><strong>Professor Matt Heun and Curtis Kortman</strong></p>
<p>In summer&nbsp;2015,<span>&nbsp;Curtis Kortman and Professor Heun researched how the Internet of Things, an idea where all devices are connected and share information, could be used to improve building energy efficiency. The research focused on the development of a Raspberry Pi prototype that could be used to gather relevant environmental data such as light levels, temperature, and occupancy. To make the data useful, a web interface was developed so the data could be viewed remotely. Additionally, analysis capabilities were added to improve in the data&rsquo;s usefulness for decision making. The research project will be utilized by the Calvin Energy Recovery Fund, and possibly expand to the fall semester.</span></p>
Matthew Heun

Contact Me

616-526-6663
SB 140 Science Building

Where to Find Me

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