Envelope (motion)

In mechanical engineering, an envelope is a solid representing all positions which may be occupied by an object during its normal range of motion.

Another (jargon) word for this is a "flop".

Wheel envelope

In automobile design, a wheel envelope may be used to model all positions a wheel and tire combo may be expected to occupy during driving. This will take into account the maximum jounce and rebound allowed by the suspension system and the maximum turn and tilt allowed by the steering mechanism. Minimum and maximum tire inflation pressures and wear conditions may also be considered when generating the envelope.

This envelope is then compared with the wheel housing and other components in the area to perform an interference/collision analysis. The results of this analysis tell the engineers whether that wheel/tire combo will strike the housing and components under normal driving conditions. If so, either a redesign is in order, or that wheel/tire combo will not be recommended.

Wii MotionPlus

The Wii MotionPlus (Wiiモーションプラス) is an expansion device for the Wii Remote video game controller for the Wii that allows it to capture complex motion more accurately. According to Nintendo, the sensor in the device supplements the accelerometer and Sensor Bar capabilities of the Wii Remote to enable actions to be rendered identically on the screen in real time.

The Wii's successor console, the Wii U, supports the Wii MotionPlus and its peripherals in games where use of its touchscreen-built-in primary controller is not necessary.

History

The Wii MotionPlus was announced by Nintendo in a press release on July 14, 2008, and revealed the next day at a press conference at the E3 Media & Business Summit. It was released in June 2009. On May 3, 2010, Nintendo announced that starting May 9, 2010, the company will include its Wii Sports Resort game and MotionPlus controller with new consoles with no price increase.

Development

The Wii MotionPlus was developed by Nintendo in collaboration with game development tool company AiLive. The sensor used is an InvenSense IDG-600 or IDG-650 in later units, designed in accordance to Nintendo's specification; with a high dynamic range, high mechanical shock tolerance, high temperature and humidity resistance, and small physical size.

Motion (democracy)

A motion is a formal step to introduce a matter for consideration by a group. It is a common concept in the procedure of trade unions, students' unions, corporations, and other deliberative assemblies. Motions can be oral or in writing, the written form being known as a resolution.

Proposing motions

A motion is generally proposed by an individual, usually a member of the body, for the consideration of the body as a whole. With the exception of certain incidental and privileged motions, the person making the motion, known as the mover, must first be recognized by the chairman as being entitled to speak; this process is known as obtaining the floor.

Once the mover has obtained the floor, the mover states the motion, normally prefixed with the phrase "I move." For instance, at a meeting of the board of directors of a corporation, a director may state "I move that the corporation delays the launch of the new product from April to July." If the motion was in writing, the mover would say "I move the resolution at the desk" or "I move the following resolution" and would then read it. Generally, once the motion has been proposed, consideration by the assembly occurs only if another member of the body immediately seconds the motion.

Motion (conference)

motion is one of North America’s leading innovative and uniquely intimate conference for creatives. Influential creative pros in the motion picture and broadcast industries take the stage to share unique concepts and innovative ideas: 18-minute TED talk style presentations designed to revitalize the creative muse and feed your creative brain.

motion was founded in 2006, as a one-off one-day regional event taking place in the Southwest part of the United States. In 2007, the conference became an annual multi-day worldwide event, and is attended by creatives including motion designers, producers, visual effects artists, writers, animators, motion picture title designers, broadcast designers, creative directors, graphic designers, and illustrators.

June 2015, motion will be held at the New Mexico History Museum Auditorium in Santa Fe, New Mexico in conjunction with CURRENTS International New Media Festival.

Background

Mission Statement

The motion staff of 2 people is headquartered in Albuquerque.

Envelope

An envelope is a common packaging item, usually made of thin flat material. It is designed to contain a flat object, such as a letter or card.

Traditional envelopes are made from sheets of paper cut to one of three shapes: a rhombus, a short-arm cross, or a kite. These shapes allow for the creation of the envelope structure by folding the sheet sides around a central rectangular area. In this manner, a rectangle-faced enclosure is formed with an arrangement of four flaps on the reverse side.

Overview

When the folding sequence is such that the last flap to be closed is on a short side it is referred to in commercial envelope manufacture as a pocket - a format frequently employed in the packaging of small quantities of seeds. Although in principle the flaps can be held in place by securing the topmost flap at a single point (for example with a wax seal), generally they are pasted or gummed together at the overlaps. They are most commonly used for enclosing and sending mail (letters) through a prepaid-postage postal system.

Envelope (mathematics)

In geometry, an envelope of a family of curves in the plane is a curve that is tangent to each member of the family at some point. Classically, a point on the envelope can be thought of as the intersection of two "adjacent" curves, meaning the limit of intersections of nearby curves. This idea can be generalized to an envelope of surfaces in space, and so on to higher dimensions.

Envelope of a family of curves

Let each curve C_t in the family be given as the solution of an equation f_t(x, y)=0 (see implicit curve), where t is a parameter. Write F(t, x, y)=f_t(x, y) and assume F is differentiable.

The envelope of the family C_t is then defined as the set of points for which

for some value of t, where is the partial derivative of F with respect to t.

Note that if t and u, t≠u are two values of the parameter then the intersection of the curves C_t and C_u is given by

or equivalently

Letting u→t gives the definition above.

An important special case is when F(t, x, y) is a polynomial in t. This includes, by clearing denominators, the case where F(t, x, y) is a rational function in t. In this case, the definition amounts to t being a double root of F(t, x, y), so the equation of the envelope can be found by setting the discriminant of F to 0.

Synthesizer

A sound synthesizer (usually abbreviated as "synthesizer" or "synth", also spelled "synthesiser") is an electronic musical instrument that generates electric signals that are converted to sound through instrument amplifiers and loudspeakers or headphones. Synthesizers may either imitate the still existing sounds (instruments, vocal, natural sound, etc.), or generate new electronic timbres not existing before. They are often played with a musical keyboard, but they can be controlled via a variety of other input devices, including music sequencers, instrument controllers, fingerboards, guitar synthesizers, wind controllers, and electronic drums. Synthesizers without built-in controllers are often called sound modules, and are controlled via MIDI or CV/Gate using a controller device.

Synthesizers use various methods to generate signal. Among the most popular waveform synthesis techniques are subtractive synthesis, additive synthesis, wavetable synthesis, frequency modulation synthesis, phase distortion synthesis, physical modeling synthesis and sample-based synthesis. Other less common synthesis types (see #Types of synthesis) include subharmonic synthesis, a form of additive synthesis via subharmonics (used by mixture trautonium), and granular synthesis, sample-based synthesis based on grains of sound, generally resulting in soundscapes or clouds.