, 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); })(); Robert Bishop | 黄大仙高手论坛

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Robert Bishop

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Robert Bishop

  • Fri, Sep 20, 2024
  • 3:30 pm–5:30 pm
Contextual Emergence: Constituents, Context and Meaning

Nothing behaves concretely as it does apart from context. The most basic laws of physics, for instance, establish the space of possibilities for material behavior, but stability conditions defining a context are required for specific concrete actualities (e.g., water flowing from a faucet). Concrete contexts are at least as important鈥揳s fundamental鈥揳s the most basic particles and forces for the existence of physical systems and their behaviors. The interplay between the constituents of a system and the context for the system's behavior and existence is captured by contextual emergence. Such emergence allows for meaningful system behavior. I will explain and illustrate how contextual emergence captures the interplay between constituents and context. Drawing on examples from physics, biology, and neuroscience, contextual emergence avoids the problematic reduction of everything to the play of forces on elementary particles or the mysterious and disunifying 鈥渞adical emergence鈥 of ontologically given brute factors coming from nowhere.

 

About Robert Bishop

Dr. Bishop is professor of Physics and Philosophy at Wheaton College. He is interested in the foundations of the physical and social sciences. In particular, he explores determinism, irreversibility in statistical mechanics and thermodynamics, nonlinear dynamics and its implications for modeling, hidden cultural and ethical ideals in the social sciences, and the implications of science and its assumptions for theories of mind, free will, and consciousness.

Sponsored by the DeVries Institute and the West Michigan Chapter of the American Scientific Affiliation, along with Calvin's Departments of Physics and of Philosophy.

Discussion and pizza after his talk will be hosted by Calvin's Science and Religion Forum (ScARF) in the Chapel Undercroft.