The first satisfactory screw-cutting lathes were made by an English instrument maker, Jesse Ramsden (1735-1800) in 1770. His work had wide ramifications, probably inspiring a large screw-cutting lathe first designed by Henry Maudslay (1771-1831) in 1797 and produced in 1800. The micrometer for the bench work on this machine was accurate to 1/10,000 of an inch. Maudslay had a long-lasting influence on the British machine tool industry. Three of his assistants developed other variants of machine tools. Richard Roberts (1789-1864) introduced a more powerful lathe, and in 1817 built the first planing machine for metal, and shortly thereafter, his first gear cutting machine. He also improved the spinning mule and designed a punching machine for making rivet holes in 1847. Joseph Whitworth (1803-1887) improved and enlarged many of the early machine tools, which he first encountered in Maudslay's works. He is best known for constructing a measuring machine that could measure to an accuracy of one-millionth of an inch, and for first suggesting the standardization of screw threads in English industry. Probably Maudslay's greatest protege was James Nasmyth (1808-1890), whose inventions include the milling machine and a planing machine or shaper.
However, the prestige of being the greatest machine tool maker in England probably belongs to John Wilkinson, the Ironmaster (1728-1808). He invented the cylinder boring machine (the boring mill, circa 1775) that made Watt's steam engine a practical source of power. He was the first to demonstrate that coke made from coal could be used in place of charcoal to produce quality iron on a large scale. He designed in 1779, the first all-iron bridge constructed in England (1781), and his factory cast the iron for it. During the late 1780s he minted his own "wage tokens" when the English government failed to produce enough coins for him to pay his workers. At the same time (1787) he built the first iron barge to transport his iron products down the River Severn. He was an able businessman and an industrial genius, whose name is attached today to Wilkinson razor blades. Wilkinson offers us a significant example of the power of the producer, a man who was an inventor, creator, builder, and businessman.
Although Wilkinson took out a number of patents during his life, when he made his boring mill in 1775, he felt that secrecy was better protection against the pirating of his invention than a patent complete with drawings. He was probably right, for his machine works were the only ones to bore cylinders for the firm of Boulton and Watt for 25 years. In England, the first patent had been granted in 1552. Their abuse by the Crown for the issue of money-raising grants of monopoly let Parliament in 1624 to declare that such privileges were grievous and inconvenient. However, the Crown was left free to grant exclusive rights under letters patent for not more than twenty-one years to "the first and true inventor or inventors of manufactures." Neo-Tech businessmen, like Wilkinson, realized that state protection did not always accomplish what it set out to do, and that he was better off relying upon trade secrecy rather than seeking government assistance in protecting his invention.
Second, from the Earth's surface these arc viewed through a thick atmosphere that completely absorbs most radiation except within certain "windows", wavelength regions in which the radiation can pass through the atmosphere relatively freely in the optical, near-infrared, and radio bands of the electromagnetic spectrum: and even in these windows the atmosphere has considerable effects. For light, these atmospheric effects arc as follows: (1) some absorption that dims the radiation somewhat, even in a clear sky; (2) refraction, which causes slight shin in the direction so that the object appears in a slightly different place; (3) scintillation (twinkling): Le., fluctuations in brightness of effectively point-like sources such as stars, fluctuations that are, however, averaged out for objects with larger images, such as planets (the ionosphere, an ionised layer high in the atmosphere, and interplanetary medium have similar effects on radio sources): (4) image movement because of atmospheric turbulence ("bad seeing") spreads the image of a tiny point over an angle of nearly one arc second or more on the celestial sphere (one arc second equals 1/3,600 degrees); and (5) background light from the night sky The obscuring effects of the atmosphere and its clouds are reduced by placing observing stations on mountains, preferably in desert regions (e.g., southern California and Chile), and away from city lights.
The effects arc eliminated by observing from high-altitude aircraft, balloons, rockets, space probes, and artificial satellites. From stations outside all or most of the atmosphere, gamma rays and X-rays -- that is, high-energy radiation at extremely short wave-lengths and far-ultraviolet and. far-infrared radiation, all completely absorbed by the atmosphere at ground level observatories, can be measured. At radio wave-lengths between about one centimetre and 20 meters, the atmosphere (even when cloudy) has little effect, and man-made radio signals arc the chief interference
Third, the Earth is a spinning, shifting, and wobbling platform. Spin on its axis causes alternation of day and night and an apparent rotation of the celestial sphere with stars moving from east to west.Ground-based telescopes use a mounting that makes it possible to neutralize the rotation of Earth relative to the stars: with an equatorial mounting driven a proper speed, the direction of the telescope tube can be kept constant for hours while the Earth turns under the mounting. Large radio telescopes usually have vertical and horizontal axes (altazimuth mounting), with their pointing continuously controlled by a computer. In addition to the daily spin, there are much more gradual effects, called precession and nutation
Gravitational action of the Sun and Moon on the Earth's equatorial bulge causes the Earth's axis to process like a top or gyroscope, gradually tracing out a circle on the celestial sphere in about 26,000 years, and also to nutate or wobble slightly in a period of I 8.6 years. The Earth's rotation and orbital motion provide the basic standard of directions of stars, so that uncertainties in the rate of these motions can lead to quite small but important uncertainties in measurements of stellar movements
EVEN BEFORE THE ADVENT OF TV telecasts, a tour of England by an Indian cricket team always had enormous appeal for the fans back home. The BBC radio commentary enabled the Indian fan to follow the post-lunch play after returning from work. The feel of the English summer game being played against the backdrop of everyday life was vividly conveyed by commentators like Brian Johnstone: “And as Kapil Dev runs into bowl, another train pulls out of Warwick Station.” Apart from hearing the cricket, you could read it in the morning newspaper. There were the likes of The Times of India cricket correspondent K N Prabhu who was never shy of reminding the Indian fan that the summer game in England was played at venues steeped in history. And then there was the swashbuckling Aussie all-rounder turned correspondent Keith Miller whose introduction to his report on India creating history by winning its first series in England in the summer of 1971 at the Oval is still fresh in the memories of hard-boiled cricket fans: “India, you finally did it! But, phew, what a nerve-tingling, nail-biting affair!” .Miller went on to mix metaphors while writing about leg-spinner chandrashekar’s deliveries “snaking off the pitch like greased lightning” as he won the Oval Test for India. The low point would have to punch magazine’s cartoon on India’s score of 42 all out in the Lord’s Test in the 1974 tour where a female spectator tells her hubby.”You should have gone to the loo before we left home. The entire Indian second innings is over!” Once the India-England Test series starts in July, we will be treated to the telecast on ESPN and the commentary by legends like Botham, Gower, Holding and Gavaskar, backed by Hussain and Shastri. Each time fast bowler Harmison’s deliveries go so far down the legside that they cannot be collected by diving wicket-keeper Prior, Gower is liable to quip that “The good old Harmy radar is not quite working today!” There could be a few humorous asides on the BCCI’s inability to find a coach for the Indian team. However, even the call-a-spade-a shovel Botham could refrain from pointing out the only reason why the BCCI chose the 72-year-old Chandu Borde at the last minute as the manager for the Indian tour was because c K Nayudu(born on October31, 1895) and DB Deodhar (January 14, 1892) were not around! You could even call the commentary the icing on the cake in terms of the appeal the game has for millions, especially in the country which Nirad G Chaudhuri once termed as “the Continent of Circe”. Once the England-India Test series starts, walk down any Indian road - high street or low - and you will find quite a few people rooted on the pavement and looking intently through the shop window of an electronic store which has rows of TVs stacked one on top of the other, all tuned in to the live cricketing action. It is the kind of vision which could have inspired Simon & Garfunkel to sing. “And in the naked light I saw Ten thousand people, even more People talking without speaking, /People listening without hearing,/People writing songs that voices never share. And no one dare/Disturb the sound of silence.”
Painstaking observations of a kind of subatomic dance suggest that the universe may contain a shadowy form of matter that has never been seen directly and is unexplained by standard physics theories, a team of scientists working at Brookhaven National Laboratory on Long Island announced yesterday. The studies appear to confirm similar findings the scientists reported last year. The research involves muons, rare subatomic particles similar to electrons but 207 times as heavy. The work has been controversial, though for reasons that have little to do with the experiment itself. Theorists who are not involved in the research, but whose computational results must be used to interpret it, have recently uncovered errors and uncertainties in their own work. For that reason, the Brookhaven experimenters say they are not ready to claim they have proved a new form of matter exists.
In a weird reflection of the boundless complexity of modern physics, top theorists from around the world were still sending conflicting calculations to the Brookhaven team in the hours before the new findings were disclosed yesterday afternoon at the laboratory. Frustration with the theorists boiled over at the lab, where scientists have been hoping that more than a year of new work would determine whether they had stumbled upon what would be a history-making discovery. The frustration stems from the seeming inability of the theorists to reach a solid conclusion. ''We're telling them, 'Look, you guys, get the damn answer on the table,' '' said Dr. Thomas B. Kirk, Brookhaven's associate director for high energy and nuclear physics.
The researchers found that muons wobbled like microscopic tops, or perhaps frenetic dancers, about 229,074 times a second, when they were placed in a powerful magnetic field in a vacuum chamber. Physicists have long known that such vacuums are not really empty, but are filled with a sea of ''virtual'' particles that flit briefly into existence and back into nothingness again. Like dance partners, the virtual particles change the rate at which the muons wobble. Theoretical physicists have long labored to calculate how much the rate of wobble, or precession, changes as a result of all the known particles in the virtual sea. Using those calculations, the Brookhaven researchers found last year -- and confirmed with the newer studies, involving observations of four billion muons -- that the actual wobble is about 0.6 times a second faster than predicted. The difference, called an anomaly by physicists, means the universe must contain previously undiscovered particles.
''If that sea contains some particles we didn't know about before, that will modify the anomaly,'' said Dr. James Miller, a professor of physics at Boston University -- one of 11 institutions in the United States, Russia, Japan and Germany involved in the experiment -- who presented the results yesterday. ''And the rate of precession is just directly proportional to that anomaly.'' Such a finding would delight many physicists who have been suggesting for years that the accepted theory, called the Standard Model, contains deep conceptual faults that can only be remedied with a more abstruse theory called supersymmetry. That theory predicts that every known particle has a difficult-to-detect partner that has yet to be discovered -- perhaps the extra particles in the virtual sea that the Brookhaven experiment may be detecting.
The initial Brookhaven finding was announced in February 2001. But a group of theorists in Marseille, France, announced in October that they had found a computational error in work led by another highly respected theorist, Dr. Toichiro Kinoshita of Cornell University, which was used to produce the Standard Model's prediction for the wobble. Dr. Kinoshita, who was traveling in Japan and unavailable for comment yesterday, acknowledged that a bug in his computer software had produced the error, said Dr. Sally Dawson, leader of the high-energy theory group at Brookhaven. A revised calculation found that the difference from the Standard Model's prediction, and therefore the evidence that new physics had been discovered, was ''much smaller than before,'' Dr. Dawson said.
That set off a worldwide scramble to refine the calculations further. So as the announcement approached yesterday, Dr. Lee Roberts, a physics professor at Boston University who is a spokesman for the Brookhaven experiment, was still sorting e-mail messages about new, conflicting calculations by theorists from Japan, Russia, Switzerland, England and France. ''Obviously, this is all work in progress,'' Dr. Roberts said. But all the new calculations showed at least some deviation from the Standard Model, he said. A few even suggested huge deviations, he added with a nervous chuckle. Meanwhile, the experimenters have a more immediate worry: the Bush administration has decided to end their financing after this year.
One statistic is missing from the slew of data published about the state of the U.S. economy. It is the length of the commute between San Francisco and Silicon Valley. Since last fall, when the layoffs began in the valley, this journey, which I have been making twice a day for the past 15 years, has started to shorten. There are plenty of signs of the shockingly sudden economic slowdown during my commute. The radio isn't filled with the hopeful jingles of Internet retailers, and I can almost always get a cell-phone circuit. Some of the signs are just that--vacancy signs dangling from buildings whose landlords until recently were demanding shares in the companies started by their tenants. And the blank billboards along Highway 101--the valley's main thoroughfare--mutely advertise the downturn. There are few tire kickers in the lots of the luxury-automobile dealers. Near my office, the people who sometimes paraded along the sidewalk bearing placards that said WILL WORK FOR EQUITY have mercifully disappeared. All this is good news for those of us whose business is to help start and organize young companies. Today Silicon Valley is akin to Fort Lauderdale, Fla., after spring break. The tourists have abandoned us. Most of the people who came here in search of a quick buck during the past few years have gone. The foreign billionaires have scuttled back to Europe and Asia, the corporate parvenus have retreated, and Hollywood celebrities no longer swish through our office seeking a smattering of pixie dust. Suddenly, starting a company is no longer a fashion statement. Now only the genuine believers want to leave large companies to create or join a new business. Everyone has become far more prudent about spending money. Unbridled optimism has been splattered with a large coating of reality. Today the climate for investments in tiny, unknown valley fledglings is the best it has been for more than 10 years. I don't mean to belittle the human consequences of the recent convulsions. If it's any consolation, plenty of companies with which I've been involved have encountered their share of bad news and hard times. But this is the inevitable result of the excitement and chaos that surround any new industry. Think of all the dreams that were shattered, careers that were ruined and money that was lost as a result of the birth of the huge industries that developed around oil, telephones, movies, automobiles, airplanes, semiconductors and personal computers. Working with young companies can be dangerous for anyone. It doesn't matter whether that was in Akron, Ohio, in the 1870s, Detroit in the 1920s or Santa Clara, Calif., in the 1990s. In Silicon Valley the cycle of enthusiasm and disappointment has been compressed as the years have gone by and the pace of innovation has increased. The 1960s spawned the rise of the semiconductor business. The 1970s brought personal computers. The 1980s gave us computer-networking companies and biotech firms. And the 1990s produced a rush of Internet companies. Each of these waves was followed by disappointments as hundreds of weak companies collapsed or were gobbled up by their larger competitors. But all these periods gave rise to the formation of a handful of venture capital-backed firms that have come to occupy major roles in the U.S. and the global economy, such as Intel, Compaq, Amgen, Microsoft, Sun Microsystems, Dell, AOL, Oracle and Cisco Systems. If the savagery of a young industry leads to casualties, so does the chaos surrounding rapid corporate growth. There is barely an important technology company that has not had a close encounter of the worst kind. Over the past 20 years, business writers have penned plenty of premature obituaries for all the companies I just mentioned. These companies seem to go through similar phases: a period of obscure labor followed--in rapid order--by glowing notoriety, loosely controlled growth, chest-pounding arrogance, a rude comeuppance and public humiliation. The fortunate recover and become stronger. The weak surrender to economic necessities. Although stock-market indexes are dropping to ankle level, there is still little reason for gloom about the long-term prospects for U.S. technology companies. Progress will not stop. Invention will not cease. Ambition will not evaporate. Many years ago, during a similar period of bleakness, we encountered a little company with a dozen employees attacking a market that few people understood. Eight weeks after the crash of 1987, when the only sound in the air was of checkbooks slamming shut, Sequoia Capital became the first investor in this unknown company. Its name was Cisco Systems.
For many of us, George Orwell's "1984" was required reading at some point during our formative years. The picture it painted of a world where privacy was virtually nonexistent and the consequences faced by an individual who dared to oppose the system provoked in many of us an almost instinctive reaction against such a totalitarian exercise of raw authority.
In the 23 years since the actual year 1984 came and went -- happily with few of the horrors envisioned by Mr. Orwell when he finished the novel back in 1948 coming to pass -- we have allowed our privacy to seep away. Instead of ceding control of our private information to a single all-powerful regime, however, we dole it out in bits and pieces to a diffuse network of eager information-gatherers, many if not most of them in the private sector.
Sometimes we trade it willingly for the sake of convenience, as when we disclose a credit card number to a voice over the phone or a Web site over the Internet. Sometimes we reveal ourselves without knowing it, as when the Web sites we visit are tracked and recorded by small programs surreptitiously loaded onto our computers, which report our meanderings to some private master, usually an advertising company. Sometimes we may not think about it very much, as when we hand our drivers' license to a guard in the lobby of an office building who asks for our identification and then scans the license into the building's computers.
Our MetroCards can track the subway stations we use; E-ZPass records the tolls we pay; our cell phone records detail the calls, text messages, and pictures we send and receive. Google or Hotmail or Yahoo hold our e-mails for us and, increasingly, our personal documents, images, spreadsheets, financial records and even (in a recent venture) personal medical records. Surveillance cameras have blossomed in such numbers that, at any moment when out in a public or semi-public space, it is not unreasonable to assume that our grainy image is being recorded by someone.
It should thus come, as no surprise that communications made during work hours may likewise be less than private, even if they relate to purely personal matters. On reflection, this is not unreasonable; communications systems are to today's offices what the assembly line was to Henry Ford: They are the instruments by which the employer makes money. It is far from unreasonable for employers to place restrictions on how those systems can be used by employees. And because so much of what happens in business is recorded by those systems, it is just as reasonable to expect employers to be able to monitor the information exchanged over those systems by company employees.
These cases do not address the situation where an employer institutes a policy that permits some personal use of firm communications systems, but still retains the right to access all systems and to review all communications. They also do not discuss the implications of the waivers that were found to have occurred. Presumably the employees in these cases had some communications with their attorneys away from the office. Should the waiver of the privilege caused by the employees' use of company computer systems result in a waiver of the privilege as to all other communications with counsel on the same topic as well?
They also do not address the situation of voice mail or phone communications. In many companies, telephone systems are now integrated with company computer systems; indeed, many phone conversations are carried over the Internet via so-called "VoIP" systems and no longer use traditional phone lines, at least within the confines of the employer. In those cases, does the broad language of the company's communications policy allow the company to eavesdrop on the employee's conversations or capture and record them on a company server?
The clearest advice for employees wishing to confer with their personal attorneys during business hours would be to make sure that all remote communications take place over communications devices that are controlled by the employee -- a personal cell phone, home computer and home phone lines.
Employers, on the other hand, may want to weigh the relative merits and problems associated with creating a "limited personal privacy exemption" for employees using company communications systems. While such an exemption may come to be considered a valuable benefit, it would have to be carefully crafted to limit liability to the employer. Perhaps one way might be to provide a "personal Internet use" link on the company system, or "personal use" phone booths and lines, and making it clear to employees how to go about taking advantage of those benefits. The dangers of accommodating such personal privacy, however, may outweigh the benefits.
Although ''Vespertine,'' the long-awaited album by the pop singer Bjork, will finally be released next week, fans with Internet access are already listening to its tunes. As part of an online marketing campaign for the album, remixed versions of three songs are available at Bjork.com as free downloads, including a country-and-Middle Eastern treatment of the first single, ''Hidden Place.'' That was the official edition. Now, here is a ''digital populist'' remix of that paragraph, putting a different spin on the basic information that you can hear Bjork's new songs online. Keith Kenniff spent Thursday remixing ''Hidden Place.'' To enliven the moody number he added an introduction, modified the chorus and dropped in some tricky beats. But Mr. Kenniff is not part of the ''Vespertine'' production team. He is a 19-year-old drummer in State College, Pa., with a fondness for Bjork's songs and the computer skills to tinker with them. ''I like taking someone else's ideas, bringing them into your own head and trying to make sense of them through your own interpretation,'' Mr. Kenniff said. Judging from Bjork Remix Web, a remarkable site at www.arktikos.com, he has plenty of company. Mr. Kenniff's remake of ''Hidden Place'' is one of 10 ''Vespertine'' tracks on the site. Overall it contains nearly 800 remixes, submitted by about 160 different Internet contributors, of songs taken from Bjork's five solo albums. If transferred to compact disc, the fan-made music would fill about 50 albums. The Web site was started in 1997 by Hisakazu Tanaka, a software programmer in Japan who is, needless to say, a serious Bjork devotee. Mr. Tanaka said he expected the release of ''Vespertine'' to spur a new round of submissions, bringing the year-end total to 900 remixes. The site's growth demonstrates how digital technology, abetted by the Internet, is turning fans from passive acolytes to active participants in the artistic process. In postmodern culture, in which existing elements are routinely cut, pasted and blended into new works, computers are providing handy tools for these transformations, and the Internet is supplying an eager audience for the results. Music is just one realm where this is happening. There are hundreds of ''fan fiction'' sites, where amateur authors have taken popular characters from television shows like ''Star Trek'' and ''The West Wing'' and written new, sometimes smutty stories about them. In film, a shorter version of the ''Star Wars'' movie ''The Phantom Menace,'' digitally edited by a supposedly impatient fan, is rumored to be circulating in cyberspace. Bjork was among the first pop stars to take the plunge into remix culture. Over the course of her solo career, this Icelandic singer has invited dozens of professional remixers to reimagine her songs, including the tunes previewed on her Web site. Next to these efforts, the Bjork Remix Web entries range from the revelatory to the mangled. But Mr. Kenniff, who has submitted 52 remixes, is a skilled craftsman. His ''Glow'' mix of the song ''Headphones,'' taken from Bjork's 1995 album ''Post,'' benefits from a gorgeous keyboard countermelody and a strengthened rhythmic pulse. It is arguably as good as any of Bjork's commissions. Yet there are few places for Mr. Kenniff to ply this aspect of his trade. As the Napster controversy has shown, the music industry is not wild about an Internet where music files are shared freely. Nor is it easy to name musicians who would be thrilled to have fans fiddle with their precious tunes. This might explain why, except for the occasional label-sponsored contest, sites similar to Bjork Remix Web remain scarce. Even Bjork Remix Web has never been fully authorized by the singer's camp. Mr. Tanaka thinks two enthusiastic messages from Bjork in the site's guest book are fake. In an e-mail message Bjork's manager, Scott Rodger, said she was aware of the site but not actively involved in it. He declined to answer additional questions or to arrange an interview with Bjork on the subject. What appears to be a policy of benign neglect has probably kept the site online, and Mr. Tanaka said he was not worried about legal challenges over copyright violations. Still, he would not give his age or identify where in Japan he lived, other than to say west of Tokyo. Mr. Tanaka runs the well-designed site from his bedroom studio, where he also has prepared 42 remixes of his own. ''Remixing is a way that I, who live in a country far from Iceland, can approach her mind,'' he said. Feeling closer to an idolized performer or favorite character may motivate fans to engage in online remixing. But when the starting point is someone else's creative output, can the results be viewed as being wholly original? Marta Asensio, a video editor in Madrid, acknowledged that remixing a ''Vespertine'' song for Mr. Tanaka's site seemed ''a little vampirical.'' An aspiring composer, she made her version of ''An Echo a Stain'' only as a way to help find her own sound. But Matthew Herbert hears things differently. A rising star in the remixers' universe, this London musician programmed percussion parts for the album version of ''Hidden Place'' and has more than 100 remixed songs to his credit. Digitally remixing music ''is a new genre, and no one seems to have quite realized it yet,'' Mr. Herbert said. ''It's like a recipe. You take the ingredients that they've already got and construct a different dish from it.'' Classically trained as a child, Mr. Herbert, 29, likened remixed songs to the theme-and-variations compositions of Brahms. In some instances the source material is treated with respect; in others a work is ''hijacked,'' he said, so the remixer can impose his own will. For ''Pagan Poetry,'' another song from ''Vespertine,'' Mr. Herbert is producing a trio of remixes: a version with a mysterious fairground sound, an acoustic treatment and an aggressive rendering that, he said, ''will be quite full on, like blood pumping through veins.'' Mr. Herbert listened to an excerpt from the ''Pagan Poetry'' remix on Mr. Tanaka's site. In the album version, near the song's end, Bjork chants the phrase ''I love him'' with raw intimacy. Here the passage has been moved to the song's start, and the naked vocal line has been expanded with a harmonizing program. Mr. Herbert said he preferred to respect such a pure expression of emotion. For Mr. Kenniff these decisions are at the heart of the creative process and make Bjork Remix Web much more than an exercise in knob twiddling. Compared with original songwriting, ''where you have to create something out of nothing, here you are creating something out of something,'' he said. ''Most of the time it proves to be a very hard thing to do.''
Although ''Vespertine,'' the long-awaited album by the pop singer Bjork, will finally be released next week, fans with Internet access are already listening to its tunes. As part of an online marketing campaign for the album, remixed versions of three songs are available at Bjork.com as free downloads, including a country-and-Middle Eastern treatment of the first single, ''Hidden Place.''
That was the official edition. Now, here is a ''digital populist'' remix of that paragraph, putting a different spin on the basic information that you can hear Bjork's new songs online. Keith Kenniff spent Thursday remixing ''Hidden Place.'' To enliven the moody number he added an introduction, modified the chorus and dropped in some tricky beats. But Mr. Kenniff is not part of the ''Vespertine'' production team. He is a 19-year-old drummer in State College, Pa., with a fondness for Bjork's songs and the computer skills to tinker with them. ''I like taking someone else's ideas, bringing them into your own head and trying to make sense of them through your own interpretation,'' Mr. Kenniff said. Judging from Bjork Remix Web, a remarkable site at www.arktikos.com, he has plenty of company. Mr. Kenniff's remake of ''Hidden Place'' is one of 10 ''Vespertine'' tracks on the site. Overall it contains nearly 800 remixes, submitted by about 160 different Internet contributors, of songs taken from Bjork's five solo albums. If transferred to compact disc, the fan-made music would fill about 50 albums.
The Web site was started in 1997 by Hisakazu Tanaka, a software programmer in Japan who is, needless to say, a serious Bjork devotee. Mr. Tanaka said he expected the release of ''Vespertine'' to spur a new round of submissions, bringing the year-end total to 900 remixes. The site's growth demonstrates how digital technology, abetted by the Internet, is turning fans from passive acolytes to active participants in the artistic process. In postmodern culture, in which existing elements are routinely cut, pasted and blended into new works, computers are providing handy tools for these transformations, and the Internet is supplying an eager audience for the results.
Music is just one realm where this is happening. There are hundreds of ''fan fiction'' sites, where amateur authors have taken popular characters from television shows like ''Star Trek'' and ''The West Wing'' and written new, sometimes smutty stories about them. In film, a shorter version of the ''Star Wars'' movie ''The Phantom Menace,'' digitally edited by a supposedly impatient fan, is rumored to be circulating in cyberspace. Bjork was among the first pop stars to take the plunge into remix culture. Over the course of her solo career, this Icelandic singer has invited dozens of professional remixers to reimagine her songs, including the tunes previewed on her Web site.
Next to these efforts, the Bjork Remix Web entries range from the revelatory to the mangled. But Mr. Kenniff, who has submitted 52 remixes, is a skilled craftsman. His ''Glow'' mix of the song ''Headphones,'' taken from Bjork's 1995 album ''Post,'' benefits from a gorgeous keyboard countermelody and a strengthened rhythmic pulse. It is arguably as good as any of Bjork's commissions. Yet there are few places for Mr. Kenniff to ply this aspect of his trade. As the Napster controversy has shown, the music industry is not wild about an Internet where music files are shared freely. Nor is it easy to name musicians who would be thrilled to have fans fiddle with their precious tunes. This might explain why, except for the occasional label-sponsored contest, sites similar to Bjork Remix Web remain scarce.
Even Bjork Remix Web has never been fully authorized by the singer's camp. Mr. Tanaka thinks two enthusiastic messages from Bjork in the site's guest book are fake. In an e-mail message Bjork's manager, Scott Rodger, said she was aware of the site but not actively involved in it. He declined to answer additional questions or to arrange an interview with Bjork on the subject. What appears to be a policy of benign neglect has probably kept the site online, and Mr. Tanaka said he was not worried about legal challenges over copyright violations. Still, he would not give his age or identify where in Japan he lived, other than to say west of Tokyo.
Mr. Tanaka runs the well-designed site from his bedroom studio, where he also has prepared 42 remixes of his own. ''Remixing is a way that I, who live in a country far from Iceland, can approach her mind,'' he said. Feeling closer to an idolized performer or favorite character may motivate fans to engage in online remixing. But when the starting point is someone else's creative output, can the results be viewed as being wholly original?
Marta Asensio, a video editor in Madrid, acknowledged that remixing a ''Vespertine'' song for Mr. Tanaka's site seemed ''a little vampirical.'' An aspiring composer, she made her version of ''An Echo a Stain'' only as a way to help find her own sound. But Matthew Herbert hears things differently. A rising star in the remixers' universe, this London musician programmed percussion parts for the album version of ''Hidden Place'' and has more than 100 remixed songs to his credit.
Digitally remixing music ''is a new genre, and no one seems to have quite realized it yet,'' Mr. Herbert said. ''It's like a recipe. You take the ingredients that they've already got and construct a different dish from it.'' Classically trained as a child, Mr. Herbert, 29, likened remixed songs to the theme-and-variations compositions of Brahms. In some instances the source material is treated with respect; in others a work is ''hijacked,'' he said, so the remixer can impose his own will. For ''Pagan Poetry,'' another song from ''Vespertine,'' Mr. Herbert is producing a trio of remixes: a version with a mysterious fairground sound, an acoustic treatment and an aggressive rendering that, he said, ''will be quite full on, like blood pumping through veins.''
Mr. Herbert listened to an excerpt from the ''Pagan Poetry'' remix on Mr. Tanaka's site. In the album version, near the song's end, Bjork chants the phrase ''I love him'' with raw intimacy. Here the passage has been moved to the song's start, and the naked vocal line has been expanded with a harmonizing program. Mr. Herbert said he preferred to respect such a pure expression of emotion. For Mr. Kenniff these decisions are at the heart of the creative process and make Bjork Remix Web much more than an exercise in knob twiddling. Compared with original songwriting, ''where you have to create something out of nothing, here you are creating something out of something,'' he said. ''Most of the time it proves to be a very hard thing to do.''