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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); })(); Jim Olthoff '80 on "How important are measurements anyway?" | »Æ´óÏɸßÊÖÂÛ̳

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Jim Olthoff '80 on "How important are measurements anyway?"

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Jim Olthoff '80 on "How important are measurements anyway?"

  • Wed, Nov 06, 2024
  • 4:00 pm–5:30 pm

Science Building Lecture Hall 010

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Jim Olthoff '80

Science, technology, and trade rely on measurement standards that everyone can rely on. A meter is a meter, and a second is a second, regardless of where the measurement is done or who is doing it. But have you ever considered how ubiquitous measurements are? Or who is responsible for the world's measurement system? Dr. Olthoff is one of the 18 scientists who make sure the International System of Units meets the needs of the entire world.  Come and hear a leading expert explain the history of measurement science and the importance in our modern world.

 

Dr. Jim Olthoff ’80 is a Calvin physics alumnus and serves as chief metrologist of the National Institute of Standards and Technology (NIST). He represents the United States on several international science committees and technology working groups. He received the 2024 Distinguished Alumni Award presented by the Calvin Alumni Association. | | Sparkstory (2018)

 

Sponsored by the physics and astronomy department, engineering department, and School of STEM