Frictional Collection

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  • Friction, force that resists the sliding or rolling of one solid object over another. Frictional forces provide the traction needed to walk without slipping, but they also present a great measure of opposition to motion. Types of friction include kinetic friction, static friction, and rolling friction.
  • The top ring exhibits a higher frictional loss due to direct surface contact rather than hydrodynamic action, since the high-pressure combustion gas acts on the groove side of the ring and presses it against the cylinder liner (Section 10.7). Thus the sliding frictional power at the top ring surface is increased at increasing load.
  • To force the game to fit your screen, find the game’s configuration in the following locations: Amnesia: A Machine for Pigs Windows Vista, 7 & 8.x, 10: DocumentsAmnesiaPig Linux:.frictiona.

Penumbra is an episodic survival horror video game series developed by Frictional Games and published by Paradox Interactive and Lexicon Entertainment. The games use the HPL Engine 1, initially developed as a tech demo. Penumbra is notable for its horror styling and for allowing advanced physical interaction with the game environment.

Penumbra
Genre(s)Survival horror
Developer(s)Frictional Games
Publisher(s)Paradox Interactive
Lexicon Entertainment
Writer(s)Thomas Grip, Jens Nilsson, Tom Jubert
Composer(s)Mikko Tarmia
First releasePenumbra: Overture
30 March 2007
Latest releasePenumbra: Requiem
27 August 2008

Penumbra is an episodicsurvival horror video game series developed by Frictional Games and published by Paradox Interactive and Lexicon Entertainment. The games use the HPL Engine 1, initially developed as a tech demo. Penumbra is notable for its horror styling and for allowing advanced physical interaction with the game environment.[1]

Main series[edit]

Fractional Collection

Penumbra: Overture (2007)[edit]

Set in the year 2001, Penumbra: Overture follows the story of Philip, a thirty-year-old physicist whose mother recently died. After receiving a mysterious letter from his supposedly dead father, Philip follows a series of clues that lead him to a mysterious location in uninhabited northern Greenland.

Penumbra: Black Plague (2008)[edit]

The story of Black Plague begins as an email sent by Philip to a friend, explaining what has happened to him and begging him to finish the work he could not. The rest of the game then proceeds as a flashback narrated by Philip to his friend in the email, beginning from where the previous game left off.

Penumbra: Requiem (2008)[edit]

A puzzle expansion with nine levels for the Black Plague Gold Edition. The game starts as the last one ends, with Phillip sending the 'kill them all' message. As soon as he finishes, one of the Infected barges in and hits Phillip on the head with something unseen.

Penumbra (Tech Demo)[edit]

The Penumbra series is based on Frictional Games' earlier game 'Penumbra Tech Demo', a short tech demo meant to demonstrate the capabilities of the company's HPL Engine 1. The developers admitted that they edited the original engine which was 2D to support 3D environments.


References[edit]

  1. ^Interview With Frictional Games – Amnesia Linux Gaming News, 25 November 2009 (Article by Maxim Bardin)

External links[edit]

Wikiquote has quotations related to: Penumbra (video game series)
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Penumbra_(video_game_series)&oldid=943925375'
1997-05-20
As automotive manufacturers continue to increase their use of thermoplastics for interior components (due to cost, weight, …), the potential for frictionally incompatible materials contacting each other, resulting in squeaks and rattles, will also increase. This will go counter to the increased customer demand for quieter interiors. To address this situation, Ford's Advanced Vehicle Technology Squeak and Rattle Prevention Engineering Department and Virginia Tech have developed a tester that can measure friction as a function of relative sliding velocity during frictional instabilities such as stick slip. The Ford/VT team is developing a polymeric material pairing database that will be used as a guide for current and future designs to eliminate potential squeak concerns. Based upon the database, along with a physical property analysis of the various plastic (viscoelastic) materials used in the interior, an analytical model will be developed as a tool to predict frictional behavior. The model will be integrated into the automotive component design process (CAD/CAM/CAE) so that potential concerns can be addressed prior to critical design milestone freeze dates.
Collection
This collaborative effort between Ford and VT, to investigate friction and noise in automotive components, was establish in 1990. Some summaries thus far are as follows:
  1. 1.
    A negative slope in the coefficient of friction (COF) vs. sliding velocity curve is an indicator of frictional instabilities that can lead to noise.
  2. 2.
    The static coefficient of friction of acrylonitrile-butadiene-styrene (ABS) and polycarbonate (PC) increases as the time of contact before sliding commences is increased.
  3. 3.
    Unfilled polypropylene (PP) has a static friction which is equal to its kinetic friction and which is unaffected by the time of contact before sliding. Glass filled PP has a static friction higher than its kinetic friction.
  4. 4.
    The decrease in friction that occurs when sliding commences is more a function of composition than surface roughness.
This paper will review our research results to date. The characterization of polymer surfaces will be provided to establish material structure/property relationships (surface roughness and bulk properties) which will predict and produce stable friction behavior. Also COF versus velocity curves will be presented for several different material pairs and surface types.

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DOI: https://doi.org/10.4271/972056
Citation: Eiss, N., Lee, E., and Trapp, M., 'Frictional Behavior of Automotive Interior Polymeric Material Pairs,' SAE Technical Paper 972056, 1997, https://doi.org/10.4271/972056.
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Affiliated: Virginia Tech, Cryovac, Division of W. R. Grace, Ford Motor Co.
Event: SAE Noise and Vibration Conference and Exposition
e-ISSN: 2688-3627
Also in: Proceedings of the 1997 Noise and Vibration Conference-P-309, SAE 1997 Transactions - Journal of Passenger Cars-V106-6
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