搜尋結果
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
160 km (max) The MIM-104 Patriot is a surface-to-air missile (SAM) system, the primary such system used by the United States Army and several allied states. It is manufactured by the U.S. defense contractor Raytheon and derives its name from the radar component of the weapon system. The AN/MPQ-53 at the heart of the system is known as the ...
- 410 mm (16 in)
- 907.2 kg (2,000 lb)
- 5.3 m (17 ft 5 in)
- 870 mm (34 in)
- Studies
- Biochemistry
- Variance
- Historical Perceptions
- Contemporary Perceptions
- Evolution
- See Also
- References
While results vary slightly across reputable studies, the consensus is that the meanhuman penis, when erect, is in the range 12.9–15 cm (5.1–5.9 in) in length. A 2015 systematic review published by Veale et al. of medical research on the topic over the previous 30 years published in BJU Internationalshowed similar results, giving mean flaccid, stre...
Androgens like testosterone are responsible for penis enlargement and elongation during puberty. Penis size is positively correlated with increasing testosterone levels during puberty. But after puberty, administration of testosterone does not affect penis size, and androgen deficiency in adult men only results in a small decrease in size. Growth h...
Genetics
There are certain genes, like homeobox (Hox A and D) genes, which may have a role in regulating penis size. In humans, the AR gene, located on the X chromosome at Xq11-12, may affect penis size. The SRY gene located on the Y chromosome may have a role to play. Variance in size can often be attributed to de novo mutations. Deficiency of pituitary growth hormone or gonadotropinsor mild degrees of androgen insensitivity can cause small penis size in males and can be addressed with growth hormone...
Conditions
An adult penis with an erect length of less than 7 cm or 2.76 inches but otherwise formed normally is referred to in a medical context as having the micropenis condition. The condition affects 0.6% of men. Some of the identifiable causes are deficiency of pituitary growth hormone or gonadotropins, mild degrees of androgen insensitivity, a variety of genetic syndromes and variations in certain homeobox genes. Some types of micropenis can be addressed with growth hormone or testosteronetreatmen...
Environmental influence
It has been suggested that differences in penis size between individuals are caused not only by genetics, but also by environmental factors such as culture, diet and chemical or pollution exposure. Endocrine disruption resulting from chemical exposure has been linked to genital deformation in both sexes (among many other problems). Chemicals from both synthetic (e.g., pesticides, anti-bacterial triclosan, plasticizers for plastics) and natural (e.g., chemicals found in tea tree oil and lavend...
Ancient
Perceptions of penis size are culture-specific. Some prehistoric sculptures and petroglyphs depict male figures with exaggerated erect penises. Ancient Egyptian cultural and artistic conventions generally prevented large penises from being shown in art, as they were considered obscene, but the scruffy, balding male figures in the Turin Erotic Papyrus are shown with exaggeratedly large genitals. The Egyptian god Geb is sometimes shown with a massive erect penis and the god Minis almost always...
Post-classical
In medieval Arabic literature, a longer penis was preferred, as described in an Arabian Nights tale called "Ali with the Large Member". As a witty satire of this fantasy, the 9th-century Afro-Arab author Al-Jahiz wrote: "If the length of the penis were a sign of honor, then the mule would belong to the Quraysh" (the tribe to which Muhammadbelonged and from which he descended). The medieval Norsemen considered the size of a man's penis as the measure of his manliness, and a thirteenth-century...
Male self-perception
Males may quite easily underestimate the size of their own penis relative to those of others. A survey by sexologists showed that many men who believed that their penis was of inadequate size had average-sized penises. Another study found sex education of standard penile measurements to be helpful and relieving for patients concerned about small penis size, most of whom had incorrect beliefs of what is considered medically normal. The study found that almost all of their patients that were co...
Shrinking and enlarging
Widespread private concerns related to penis size have led to a number of folklore sayings and popular culture reflections related to penis size. Penis panic is a form of mass hysteria involving the believed removal or shrinking of the penis, known as genital retraction syndrome. The penis can significantly shrink due to scar tissue formation from a condition called Peyronie's disease which affects up to 10% of men. Products such as penis pumps, pills, and other dubious means of penis enlarge...
Among male homosexuals
A study undertaken at Utrecht University found that the majority of gay men in the study regarded a large penis as ideal, and having one was linked to self-esteem. One study analysing the self-reported Kinseydata set found that the average penis of a homosexual man was larger than the average penis of their heterosexual counterparts (6.32 inches [16.05 cm] in length amongst gay men versus 5.99 in [15.21 cm] in heterosexuals, and 4.95 inches [12.57 cm] circumference amongst gay men versus 4.80...
The human penis is thicker than that of any other primate, both in absolute terms and relative to the rest of the body. Early research, based on inaccurate measurements, concluded that the human penis was also longer. In fact, the penis of the common chimpanzeeis no shorter than in humans, averaging 14.4 cm (5.7 inches), and some other primates hav...
General and cited sources
1. "Men worry more about penile size than women, says 60-year-old research review" (Press release). Blackwell. 31 May 2007. Retrieved 11 August 2018. 2. Lee, P. A; Mazur, T; Danish, R; Amrhein, J; Blizzard, R. M; Money, J; Migeon, C. J (1980). "Micropenis. I. Criteria, etiologies and classification". The Johns Hopkins Medical Journal. 146 (4): 156–63. PMID 7366061. NAID 10010056499. 3. Lauersen, Niels; Whitney, Steven (1983). It's Your Body: A Woman's Guide to Gynecology (3rd ed.). New York:...
Frequency and voltage supplied to most premises by country Mains electricity by country includes a list of countries and territories, with the plugs, voltages and frequencies they commonly use for providing electrical power to low voltage appliances, equipment, and lighting typically found in homes and offices. (For industrial machinery, see ...
Number built. 598 as of 30 April 2024 [update] [4] The Airbus A350 is a long-range, wide-body twin-engine airliner developed and produced by Airbus . The initial A350 design proposed by Airbus in 2004, in response to the Boeing 787 Dreamliner, would have been a development of the Airbus A330 with composite wings and new engines.
Joint Base Myer-Henderson Hall – located 1 kilometer (1 mile) northwest of Arlington County, Virginia. Joint Expeditionary Base–Little Creek – located 20 kilometers (13 miles) northwest of Virginia Beach. Joint Base Lewis-McChord – located 17 kilometers (11 miles) southwest of Tacoma, Washington. Joint Base Anacostia-Bolling – located ...
Design proposal. The Lockheed Martin SR-72, colloquially referred to as "Son of Blackbird", [1] is an American hypersonic UAV concept intended for intelligence, surveillance and reconnaissance (ISR) proposed privately in 2013 by Lockheed Martin as a successor to the retired Lockheed SR-71 Blackbird. In 2018, company executives said an SR-72 ...
