Environment variable

Environment variables are a set of dynamic named values that can affect the way running processes will behave on a computer.

They are part of the environment in which a process runs. For example, a running process can query the value of the TEMP environment variable to discover a suitable location to store temporary files, or the HOME or USERPROFILE variable to find the directory structure owned by the user running the process.

They were introduced in their modern form in 1979 with Version 7 Unix, so are included in all Unix operating system flavors and variants from that point onward including Linux and OS X. From PC DOS 2.0 in 1982, all succeeding Microsoft operating systems including Microsoft Windows, and OS/2 also have included them as a feature, although with somewhat different syntax, usage and standard variable names.

Details

In all Unix and Unix-like systems, each process has its own separate set of environment variables. By default, when a process is created, it inherits a duplicate environment of its parent process, except for explicit changes made by the parent when it creates the child. At the API level, these changes must be done between running fork and exec. Alternatively, from command shells such as bash, a user can change environment variables for a particular command invocation by indirectly invoking it via env or using the ENVIRONMENT_VARIABLE=VALUE <command> notation. All Unix operating system flavors, DOS, and Windows have environment variables; however, they do not all use the same variable names. A running program can access the values of environment variables for configuration purposes.

CLS (command)

In computing, CLS (for clear screen) is a command used by the command line interpreters COMMAND.COM and CMD.EXE on DOS, OS/2 and Microsoft Windows operating systems to clear the screen or console window of commands and any output generated by them. It does not clear the user's history of commands, however. The command is also available in the DEC RT-11 operating system. In other environments, such as Linux and Unix, the same functionality is provided by the clear command.

While the ultimate origins of using the three-character string CLS as the command to clear the screen likely predate Microsoft's use, this command was present before its MS-DOS usage, in the embedded ROM BASIC dialects Microsoft wrote for early 8-bit microcomputers (such as TRS-80 Color BASIC), where it served the same purpose. The MS-DOS dialects of BASIC written by Microsoft, BASICA and GW-BASIC, also have the CLS command as a BASIC keyword - as do various non-Microsoft implementations of BASIC such as BBC BASIC found on the BBC Micro computers. The CLS command is also present in BASIC versions for Microsoft Windows, however this generally clears text printed on the form, rather than the whole screen or controls on the form.

CONFIG.SYS

CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems. It is a special ASCII text file that contains user-accessible setup or configuration directives evaluated by the operating system during boot. CONFIG.SYS was introduced with DOS 2.0.

Usage

The directives in this file configure DOS for use with devices and applications in the system. The CONFIG.SYS directives also set up the memory managers in the system. After processing the CONFIG.SYS file, DOS proceeds to load and execute the command shell specified in the SHELL line of CONFIG.SYS, or COMMAND.COM if there is no such line. The command shell in turn is responsible for processing the AUTOEXEC.BAT file.

CONFIG.SYS is composed mostly of name=value directives which look like variable assignments. In fact, these will either define some tunable parameters often resulting in reservation of memory, or load files, mostly device drivers and TSRs, into memory.

In DOS, CONFIG.SYS is located in the root directory of the drive from which the system was booted.

Funk

Funk is a music genre that originated in the mid- to late 1960s when African American musicians created a rhythmic, danceable new form of music through a mixture of soul music, jazz, and rhythm and blues (R&B). Funk de-emphasizes melody and harmony and brings a strong rhythmic groove of electric bass and drums to the foreground. Funk songs are often based on an extended vamp on a single chord, distinguishing them from R&B and soul songs, which are built on complex chord progressions. Funk uses the same extended chords found in bebop jazz, such as minor chords with added sevenths and elevenths, or dominant seventh chords with altered ninths.

Like much African-inspired music, funk typically consists of a complex groove with rhythm instruments such as electric guitar, electric bass, Hammond organ, and drums playing interlocking rhythms. Funk bands sometimes have a horn section of several saxophones, trumpets, and in some cases, a trombone, which plays rhythmic "hits". Funk originated in the mid-1960s, with James Brown's development of a signature groove that emphasized the downbeat—with heavy emphasis on the first beat of every measure, funky bass lines, drum patterns, and syncopated guitar riffs. Other musical groups, including Sly & the Family Stone and Parliament-Funkadelic, soon began to adopt and develop Brown's innovations. While much of the written history of funk focuses on men, there have been notable funk women, including Chaka Khan, Labelle, Brides of Funkenstein, Klymaxx, Mother's Finest, and Betty Davis.

As If (album)

As If is the sixth studio album by American dance-punk group !!!, released on October 16, 2015 on Warp Records.

Singles

Three official singles have been released from As If: "All U Writers", a 5 1/2 minute (5 minutes on the album) long song featuring vocals from Teresa Eggers, released 28 April 2015. "Freedom '15", a groovy leviathan of a disco track, released 30 July 2015, and features vocals from Yolanda Harris Dancy and Taletha Manor. A lyric video for "Freedom '15" was uploaded 20 August 2015. The third single from the album, "Bam City", was released 30 September 2015, with an accompanying music video. "Ooo", a grooving love song, was released with an accompanying music video on November 16, 2015.

Promotional singles

One promotional single has been released from the As If: "Sick Ass Moon", an "R&B-tinted house track", released with "Freedom '15" on 30 July 2015.

Critical Reception

In a positive review for Exclaim!, Daniel Sylvester called the album "one of the most enjoyable, if schizophrenic, dance albums of the year."

Funk (Glee)

"Funk" is the twenty-first episode of the American television series Glee. The episode was written by series creator Ian Brennan and directed by Elodie Keene. It premiered on the Fox network on June 1, 2010 and was watched by 9 million viewers. In "Funk", New Directions is intimidated by rival glee club Vocal Adrenaline. Jesse St. James (Jonathan Groff) defects back to Vocal Adrenaline, and New Directions explores funk music, knowing it is their rival club's weakness. The episode features cover versions of six songs, all of which were released as singles, available for download, and two of which are included on the soundtrack album Glee: The Music, Volume 3 Showstoppers.

The episode received mixed reviews from critics. Lisa Respers France of CNN and Blair Baldwin of Zap2it both received the episode positively. Todd VanDerWerff of The A.V. Club, Entertainment Weekly's Tim Stack and James Poniewozic of Time highlighted continuity issues with the show, while VanDerWerff and Henrik Batallones of BuddyTV deemed "Funk" a set-up episode for the season finale. Bobby Hankinson of the Houston Chronicle gave a more positive review, but still found "Funk" lacking compared to previous episodes, a sentiment shared by Aly Semigran of MTV.

Muscle hypertrophy

Muscle hypertrophy involves an increase in size of skeletal muscle through a growth in size of its component cells. Two factors contribute to hypertrophy: sarcoplasmic hypertrophy, which focuses more on increased muscle glycogen storage; and myofibrillar hypertrophy, which focuses more on increased myofibril size. However, neither happens in isolation, which is why top-level bodybuilders and strongman competitors do not differ greatly in muscle size and strength.

Hypertrophy stimulation

A range of stimuli can increase the volume of muscle cells. These changes occur as an adaptive response that serves to increase the ability to generate force or resist fatigue in anaerobic conditions.

Strength training

Strength training typically produces a combination of the two different types of hypertrophy: contraction against 80 to 90% of the one-repetition maximum for 2–6 repetitions (reps) causes myofibrillated hypertrophy to dominate (as in powerlifters, Olympic lifters and strength athletes), whereas several repetitions (generally 8–12 for bodybuilding or 12 or more for muscular endurance) against a submaximal load facilitates mainly sarcoplasmic hypertrophy (professional bodybuilders and endurance athletes). The first measurable effect is an increase in the neural drive stimulating muscle contraction. Within just a few days, an untrained individual can achieve measurable strength gains resulting from "learning" to use the muscle. As the muscle continues to receive increased demands, the synthetic machinery is upregulated. Although all the steps are not yet clear, this upregulation appears to begin with the ubiquitous second messenger system (including phospholipases, protein kinase C, tyrosine kinase, and others). These, in turn, activate the family of immediate-early genes, including c-fos, c-jun and myc. These genes appear to dictate the contractile protein gene response.