Re'eh, Reeh, R'eih, or Ree is the 47th weekly Torah portion in the annual Jewish cycle of Torah reading and the fourth in the Book of Deuteronomy. It constitutes Deuteronomy 11:26–16:17. In the parashah, Moses set before the Israelites the choice between curse. Moses instructed the Israelites in the laws that they were to observe, including the law of a single centralized place of worship. Moses warned against following other gods and their prophets and set forth the laws of kashrut, the Sabbatical year, the Hebrew slave, firstborn animals, the three pilgrim festivals; the parashah is the longest weekly Torah portion in the Book of Deuteronomy, is made up of 7,442 Hebrew letters, 1,932 Hebrew words, 126 verses, 258 lines in a Torah Scroll. Jews read it in August or early September. Jews read part of the parashah, Deuteronomy 15:19–16:17, which addresses the Three Pilgrim Festivals, as the initial Torah reading on the eighth day of Passover when it falls on a weekday and on the second day of Shavuot when it falls on a weekday.
And Jews read a larger selection from the same part of the parashah, Deuteronomy 14:22–16:17, as the initial Torah reading on the eighth day of Passover when it falls on a Sabbath, on the second day of Shavuot when it falls on a Sabbath, on Shemini Atzeret. In traditional Sabbath Torah reading, the parashah is divided into עליות, aliyot. In the masoretic text of the Tanakh, Parashah Re'eh has six "open portion" divisions. Parashah Re'eh has several further subdivisions, called "closed portions" within the open portion divisions; the first open portion spans the first and part of the third readings. The second open portion goes from the middle of the third reading to the end of the fourth reading; the third open portion spans the sixth readings. The fourth and sixth open portion divisions divide the seventh reading. Closed portion divisions further divide each of the seven readings. In the first reading, Moses told the Israelites that he set before them blessing and curse: blessing if they obeyed God's commandments and curse if they did not obey but turned away to follow other gods.
A closed portion ends here. In the continuation of the reading, Moses directed that when God brought them into the land, they were to pronounce the blessings at Mount Gerizim and the curses at Mount Ebal. Moses instructed the Israelites in the laws that they were to observe in the land: They were to destroy all the sites at which the residents worshiped their gods, they were not to worship God as the land's residents had worshiped their gods, but to look only to the site that God would choose. There they were to feast before God, happy in all God's blessings; the first reading ends with Deuteronomy 12:10. In the second reading, Moses warned the Israelites not to sacrifice burnt offerings in any place, but only in the place that God would choose, but whenever they desired, they could slaughter and eat meat in any of their settlements, so long as they did not consume the blood, which they were to pour on the ground. They were not, however, to consume in their settlements their tithes, vow offerings, freewill offerings, or contributions.
A closed portion ends with Deuteronomy 12:19. In the continuation of the reading, Moses made clear that as God gave the Israelites more land, they could eat meat in their settlements, so long as they did not consume the blood, so long as they brought their offerings to the place that God would show them; the second reading and a closed portion end with Deuteronomy 12:28. In the third reading, Moses warned them against being lured into the ways of the residents of the land, against inquiring about their gods, for the residents performed for their gods every abhorrent act that God detested offering up their sons and daughters in fire to their gods. Moses warned the Israelites to observe only that which he enjoined upon them, neither adding to it nor taking away from it; the first open portion ends here. In the continuation of the reading, Moses instructed that if a prophet appeared before the Israelites and gave them a sign or a portent and urged them to worship another god if the sign or portent came true, they were not to heed the words of that prophet, but put the offender to death.
A closed portion ends here. In a further continuation of the reading, Moses instructed that if a brother, daughter, wife, or close friend enticed one in secret to worship other gods, the Israelites were to show no pity, but stone the offender to death. Another closed portion ends here, and as the reading continues, Moses instructed that if the Israelites heard that some scoundrels had subverted the inhabitants of a town to worship other gods, the Israelites were to investigate and if they found it true, they were to destroy the inhabitants and the cattle of that town, burning the town and everything in it. They were not to rebuild on the site; the third readin
Resting metabolic rate
Resting metabolic rate is whole-body mammal metabolism during a time period of strict and steady resting conditions that are defined by a combination of assumptions of physiological homeostasis and biological equilibrium. RMR differs from basal metabolic rate because BMR measurements must meet total physiological equilibrium whereas RMR conditions of measurement can be altered and defined by the contextual limitations. Therefore, BMR is measured in the elusive "perfect" steady state, whereas RMR measurement is more accessible and thus, represents most, if not all measurements or estimates of daily energy expenditure. Indirect calorimetry is the study or clinical use of the relationship between respirometry and bioenergetics, where the measurement of the rates of change in oxygen consumption, sometimes carbon dioxide production, less urea production is transformed to energy expenditure and expressed as the ratio between i) energy and ii) the time frame of the measurement. For example, following analysis of oxygen consumption of a human subject, if 5.5 kilocalories of energy were estimated during a 5-minute measurement from a rested individual the resting metabolic rate equals = 1.1 kcal/min rate.
A comprehensive treatment of confounding factors on BMR measurements is demonstrated as early as 1922 in Massachusetts by Engineering Professor Frank B Sanborn, wherein descriptions of the effects of food, sleep, muscular activity, emotion provide criteria for separating BMR from RMR. In the 1780s for the French Academy of Sciences, Lavoisier and Seguin investigated and published relationships between direct calorimetry and respiratory gas exchanges from mammalian subjects. 100 years in the 19th century for the Connecticut-based Wesleyan University, Professors Atwater and Rosa provided ample evidence of nitrogen, carbon dioxide, oxygen transport during the metabolism of amino acids and fatty acids in human subjects, further establishing the value of indirect calorimetry in determining bioenergetics of free-living humans. The work of Atwater and Rosa made it possible to calculate the caloric values of foods, which became the criteria adopted by the USDA to create the food calorie library. In the early 20th century at Oxford University, physiology researcher Claude Gordon Douglas developed an inexpensive and mobile method of collecting exhaled breath.
In this method, the subject exhales into a nearly impermeable and large volume collection bag over a recorded period of time. The entire volume is measured, the oxygen and carbon dioxide content are analyzed, the differences from inspired "ambient" air are calculated to determine the rates of oxygen uptake and carbon dioxide output. To estimate energy expenditure from the exhaled gases, several algorithms were developed. One of the most used was developed in 1949 at University of Glasgow by research physiologist J. B. de V. Weir, his abbreviated equation for estimating metabolic rate was written with rates of gas exchange being volume/time, excluded urinary nitrogen, allowed for the inclusion of a time conversion factor of 1.44 to extrapolate to 24-hour energy expenditure from'kcal per minute" to "kcal per day." Weir used the Douglas Bag method in his experiments, in support of neglecting the effect of protein metabolism under normal physiological conditions and eating patterns of ~12.5% protein calories, he wrote: "...
In fact if the percentage of protein calories lies between 10 and 14 the maximum error in using is less than 1 in 500." In the early 1970s, computer technology enabled on-site data processing, some real-time analysis, graphical displays of metabolic variables, such as O2, CO2, air-flow, thereby encouraging academic institutions to test accuracy and precision in new ways. A few years in the decade, battery-operated systems made debuts. For example, a demonstration of the mobile Oxylog with digital display of both cumulative and past-minute oxygen consumption was presented in 1977 at the Proceedings of the Physiological Society; as manufacturing and computing costs dropped over the next few decades, various universal calibration methods for preparing and comparing various models in the 1990s brought attention to short-comings or advantages of various designs. In addition to lower costs, the metabolic variable CO2 was ignored, promoting instead a focus on oxygen-consumption models of weight management and exercise training.
In the new millennium, smaller "desktop-sized" indirect calorimeters, such as the New Leaf system from Medical Graphics were being distributed with dedicated personal computers & printers, running modern windows-based software such as BreezeSuite for Windows OS. Sophisticated software were made available to empower nutritionists and end-consumers alike to track and manage calorie intake. For example, in 2003, HealtheTech provided BalanceLog Weight Management and Nutrition Monitoring softwareshown on right and its BalanceLog Pro web product, both of which were oriented for use with their handheld & disposable BodyGemshown on left, which measured oxygen consumption and reported 24-hr resting energy expenditure. At this time, several health and wellness companies brought resting and exercise-conditions measurements as a service to the end consumer, which helped shape sales and service teams to keep these systems online and ready for gym-goers and weight management clinics. In 2014, as App Store and Google Play continued to bring millions of software apps to millions of consumers worldwide, the iOS-based Breezing Tracker brought VO2 and VCO2 measurement with a handheld battery-operated unit, connected by Bluetooth to the app
Hans Ree is a Dutch chess grandmaster and writer. He is a chess columnist for NRC Handelsblad, contributes to the chess magazines New In Chess and ChessCafe.com. His earlier publications include Rode dagen en zwarte dagen and Schaakstukjes, his more recent offering The Human Comedy Of Chess chronicles developments in the chess world in a humorous and acerbic manner, drawing on material from his columns and insider observations. Having shared the title of European Junior Champion in 1964/65 and 1965/66, Ree won the Dutch Chess Championship in 1967, 1969, 1971 and 1982. Together with reigning World Champion Boris Spassky, he was a winner of the Canadian Open Chess Championship in 1971, played in Vancouver. Ree became an International Master in 1968 and an International Grandmaster in 1980. Hans Ree rating card at FIDE Hans Ree player profile and games at Chessgames.com
Resident Evil: Extinction
Resident Evil: Extinction is a 2007 action horror film directed by Russell Mulcahy and written by Paul W. S. Anderson. A direct sequel to Resident Evil: Apocalypse, it is the third installment in the Resident Evil film series, loosely based on the Capcom survival horror video game series of the same name; the film follows the heroine Alice, along with a group of survivors from Raccoon City, as they attempt to travel across the Mojave desert wilderness to Alaska and escape a zombie apocalypse. The film received negative reviews, it was released on DVD and Blu-ray in North America on January 1, 2008. A fourth film, Resident Evil: Afterlife, was released in 2010. Alice wakes up disoriented in a mansion. Wandering through its halls, she is forced to escape several security traps. However, she is killed by a bounding mine hidden in the floor, her body is dumped into a pit filled with dozens of Alice copies and is revealed to be one of many clones being produced inside of an underground facility whose entrance above ground is surrounded by thousands of zombies.
Despite the best efforts of the bio-tech company Umbrella Corporation to cover up the contamination of The Hive and the release of the T-virus to the surface, going so far as to authorize the bombing of Raccoon City, the T-virus has spread around the world. As the virus spread, it affected not only humans, but other animals as well, the environment deteriorated, turning cities into desolate landscapes and the wilderness into wastelands; the real Alice wanders the wastelands of the Southwestern U. S. On her travels, she finds a dead man's diary which states that there is an uninfected area in Alaska, she begins to realize that she has developed telekinetic abilities due to the experiments performed on her. Meanwhile, Dr. Alexander Isaacs, former head of Project Alice and the head of the North American Umbrella facility seen earlier, considers Alice's recapture to be a top priority, since she has the ability to bond with the T-virus and not suffer mutation, he tries to persuade the Umbrella board, operating via holograms from the worldwide Umbrella facility, that he can use her blood to develop a permanent cure as well as tame the infected zombies.
The new Umbrella chairman Albert Wesker orders Isaacs to use the clones to create a cure, he refuses to authorize Alice's recapture until they are informed of her location. Meanwhile, a convoy of survivors led by Claire Redfield travels across the country in search of supplies; the convoy includes Raccoon City survivors Carlos Oliveira and L. J. along with new survivors K-Mart, Chase and Nurse Betty, among others. While searching a motel for supplies, L. J. is bitten by a zombie. The next morning the convoy is attacked by crows, feeding on the infected; the crows overwhelm the convoy, killing Nurse Betty and Otto and taking out the flamethrower operator, causing the weapon to careen out of control. Alice appears and saves Carlos and the others from a fiery death, using her telekinesis to fill the sky with fire, killing the crows and leaving her unconscious. After recovering, Alice is introduced to Claire and gives her the diary she found, she and Carlos convince Claire to take her convoy to Alaska.
Dr. Isaacs' attempts to domesticate the infected have led to a new zombie breed that remembers basic things, such as how to use phones and cameras. Wesker's security officer, Captain Alexander Slater, is adamant about Isaacs' disregard for Umbrella's regulations. Wesker, in private, tells Slater to keep watch on Isaacs' actions, to kill Issacs if he disobeys orders. Umbrella triangulates Alice's location based on the signal sent out by her telekinetic abilities. Dr. Isaacs has a crate of his new zombies sent to ambush the convoy, against Wesker's specific orders. L. J. bites Carlos. Most of the convoy, including Mikey and Chase, are killed in the ambush. Umbrella tries to shut Alice down remotely, but she breaks free from their programming and continues to fight, she finds Isaacs at the scene, he is bitten as he flees via helicopter. Alice and K-Mart use Isaacs' computer to track the helicopter's flight path, leading them to Umbrella's underground location; the convoy heads over to the site, surrounded by thousands of zombies.
Carlos sacrifices himself by plowing his truck into the zombie mob and blowing the rig apart, giving Alice and Claire time to load survivors into the helicopter. Alice decides to stay behind. Ordered by Wesker to terminate Isaacs, Slater arrives with a group of commandos and finds the scientist locked in his lab, injecting himself with massive doses of anti-virus in an attempt to counteract the infection. Slater reveals that his employment is terminated and shoots him, triggering a mutation that transforms Isaacs into a monstrous creature. Despite retaining his intelligence and thought, Isaacs kills Slater and all the facility employees, but is confined to the lab's lower levels. Entering the facility, Alice meets a holograph of the White Queen; the White Queen informs Alice that her blood is the cure to the T-virus, while defending the Red Queen's prior actions. She tells Alice about Dr. Isaacs. Alice agrees to deal with him. On her way to the lab's lower levels, Alice discovers one of her clones, still in development.
The clone appears to die from shock shortly after. Alice finds Isaacs; the two engage in a fight leading them to a replica of The Hive's laser corridor, where Isaacs is killed by the laser-defense system. Just as Alice is about to meet the same fate, the system is deactivated by her clone, whom is revealed to
Arikara known as Sahnish, Arikaree or Hundi, are a tribe of Native Americans in North Dakota. Today, they are enrolled with the Mandan and the Hidatsa as the federally recognized tribe known as the Mandan and Arikara Nation; the Arikara's name is believed to mean "horns," in reference to the ancient custom of wearing two upright bones in their hair. The name could mean "elk people" or "corn eaters." The Arikara language is a member of the Caddoan language family. Arikara is close to the Pawnee language; as of 2007, the total number of remaining native speakers was reported as ten, one of whom, Maude Starr, died on 20 January 2010. She was a certified language teacher. Linguistic divergence between Arikara and Pawnee suggests a separation from the Skidi Pawnee in about the 15th century; the Arzberger Site near present-day Pierre, South Dakota, designated as a National Historic Landmark, is an archeological site from this period, containing the remains of a fortified village with more than 44 lodges.
An Arikara village, near where present-day Pierre, South Dakota developed, was visited in 1743 by two sons of the French trader and explorer La Vérendrye. In the last quarter of the 17th century, the Arikara came under attack from the Omaha/Ponca and the Iowa near the end of the Omaha/Ponca migration to Nebraska. With peace established the Arikara influenced the newcomers; the Omaha still credit the Arikara women for instructing them in the art of building earth lodges. The Arikara lived as a semi-nomadic people on the Great Plains. During the sedentary seasons, the Arikara lived in villages of earth lodges. While traveling or during the seasonal bison hunts, they erected portable tipis as temporary shelter, they were an agricultural society, whose women cultivated varieties of corn. The crop was such an important staple of their society that it was referred to as "Mother Corn."An early European, a botanist, praised the Arikara women as excellent cultivators. He had not seen finer crops anywhere in America.
The surplus corn and other crops, along with tobacco, were traded to the Lakota, the Cheyenne and more southern plains tribes during short-lived truces. The amount of trading items passing through the Arikara villages made them a "trading center on the Upper Missouri". Before smallpox epidemics hit the three village tribes, they were the "most influential and affluent peoples in the Northern Plains". Traditionally an Arikara family owned 30–40 dogs; the people used them for hunting and as sentries, but most for transportation in the centuries before the Plains tribes adopted the use of horses in the 1600s. Many of the Plains tribes had used the travois, a lightweight transportation device pulled by dogs, it consisted of two long poles attached by a harness at the dog's shoulders, with the butt ends dragging behind the animal. Women used dogs to pull travois to haul firewood or infants; the travois were used to carry meat harvested during the seasonal hunts. The Arikara played a central role in the Great Plains Indian trading networks based on an advantageous geographical position combined with a surplus from agriculture and craft.
Historical sources show that the Arikara villages were visited by Cree, Crow, Arapaho, Kiowa, Plains Apache and Comanche. In the late 18th century, the tribe suffered a high rate of fatalities from smallpox epidemics, which reduced their population from an estimated 30,000 to 6,000, disrupting their social structure. Other estimates range from less than 10,000 people as a peak population to 25,000; the smallpox epidemic of 1780-1782 reduced the Arikara villages along the Missouri to just two from thirty-two. The effects of the epidemic may have been so terrible that it could not be comprehended but in allegorical form. All-out war hit the weakened and divided Arikara. In a burned-down village, archaeologists found the mutilated skeletons of 71 men and children, killed in the early 1780s by unknown Indian attackers. Groups of Sioux were the ones, they attacked the vulnerable Arikara and increased "the pace of Sioux expansion" west of the Missouri. The Arikara faced many challenges during the first quarter of the 19th century: Reduced numbers, competition from white traders, military pressure from the Lakota and other groups of Sioux.
Alliances shifted constantly. The Arikara joined old foes the Sioux in raids on Hidatsa Indians, they negotiated for peace with both village tribes. Due to their reduced numbers, the Arikara started to live closer to the Mandan and Hidatsa in the same area for mutual protection, they migrated from present-day Nebraska and South Dakota into North Dakota in response to pressure from other tribes the Sioux, European-American settlers. The remainder of the group was encountered in 1804 by the Clark Expedition; the first Arikara delegation left for the capital, Washington, DC, in April 1805, urged by the Lewis and Clark Expedition. Chief Ankedoucharo died in Washington; the delegates blamed the whites for the chief's death. That was one reason why the Arikara for the next decades were "notoriously hostile to white Americans". On June 2, 1823, the Arikara attacked a group of 70 trappers led by William Henry Ashley of the Henry/Ashley Company; the trappers were camped near an Arikara village at the mouth of Grand River.
A rare-earth element or rare-earth metal, as defined by IUPAC, is one of a set of seventeen chemical elements in the periodic table the fifteen lanthanides, as well as scandium and yttrium. Scandium and yttrium are considered rare-earth elements because they tend to occur in the same ore deposits as the lanthanides and exhibit similar chemical properties. A broader definition that includes actinides may be used, since the actinides share some mineralogical and physical characteristics; the 17 rare-earth elements are cerium, erbium, gadolinium, lanthanum, neodymium, promethium, scandium, thulium and yttrium. Despite their name, rare-earth elements are – with the exception of the radioactive promethium – plentiful in Earth's crust, with cerium being the 25th most abundant element at 68 parts per million, more abundant than copper. However, because of their geochemical properties, rare-earth elements are dispersed and not found concentrated in rare-earth minerals; the first rare-earth mineral discovered was gadolinite, a mineral composed of cerium, iron and other elements.
This mineral was extracted from a mine in the village of Ytterby in Sweden. A table listing the 17 rare-earth elements, their atomic number and symbol, the etymology of their names, their main usages is provided here; some of the rare-earth elements are named after the scientists who discovered or elucidated their elemental properties, some after their geographical discovery. The following abbreviations are used: RE = rare earth REM = rare-earth metals REE = rare-earth elements REO = rare-earth oxides REY = rare-earth elements and yttrium LREE = light rare-earth elements HREE = heavy rare-earth elements The first rare-earth element discovered was the black mineral "ytterbite", it was discovered by Lieutenant Carl Axel Arrhenius in 1787 at a quarry in the village of Ytterby, Sweden. Arrhenius's "ytterbite" reached Johan Gadolin, a Royal Academy of Turku professor, his analysis yielded an unknown oxide that he called yttria. Anders Gustav Ekeberg isolated beryllium from the gadolinite but failed to recognize other elements that the ore contained.
After this discovery in 1794 a mineral from Bastnäs near Riddarhyttan, believed to be an iron–tungsten mineral, was re-examined by Jöns Jacob Berzelius and Wilhelm Hisinger. In 1803 they called it ceria. Martin Heinrich Klaproth independently called it ochroia, thus by 1803 there were two known rare-earth elements and cerium, although it took another 30 years for researchers to determine that other elements were contained in the two ores ceria and yttria. In 1839 Carl Gustav Mosander, an assistant of Berzelius, separated ceria by heating the nitrate and dissolving the product in nitric acid, he called the oxide of the soluble salt lanthana. It took him three more years to separate the lanthana further into pure lanthana. Didymia, although not further separable by Mosander's techniques, was a mixture of oxides. In 1842 Mosander separated the yttria into three oxides: pure yttria and erbia; the earth giving pink salts he called terbium. So in 1842 the number of known rare-earth elements had reached six: yttrium, lanthanum, didymium and terbium.
Nils Johan Berlin and Marc Delafontaine tried to separate the crude yttria and found the same substances that Mosander obtained, but Berlin named the substance giving pink salts erbium, Delafontaine named the substance with the yellow peroxide terbium. This confusion led to several false claims of new elements, such as the mosandrium of J. Lawrence Smith, or the philippium and decipium of Delafontaine. Due to the difficulty in separating the metals, the total number of false discoveries was dozens, with some putting the total number of discoveries at over a hundred. There were no further discoveries for 30 years, the element didymium was listed in the periodic table of elements with a molecular mass of 138. In 1879 Delafontaine used the new physical process of optical flame spectroscopy and found several new spectral lines in didymia. In 1879, the new element samarium was isolated by Paul Émile Lecoq de Boisbaudran from the mineral samarskite; the samaria earth was further separated by Lecoq de Boisbaudran in 1886, a similar result was obtained by Jean Charles Galissard de Marignac by direct isolation from samarskite.
They named the element gadolinium after Johan Gadolin, its oxide was named "gadolinia". Further spectroscopic analysis between 1886 and 1901 of samaria and samarskite by William Crookes, Lecoq de Boisbaudran and Eugène-Anatole Demarçay yielded several new spectroscopic lines that indicated the existence of an unknown element; the fractional crystallization of the oxides yielded europium in 1901. In 1839 the third source for rare earths became available; this is a mineral similar to uranotantalum. This mineral from Miass in the southern Ural Mountains was documented by Gustav Rose; the Russian chemist R. Harmann proposed that a new eleme
The Crystal Singer, or Crystal Singer in the U. S. is a young adult, science fiction novel by Anne McCaffrey, first published by Severn House in 1982. It features the transition by Killashandra Ree, a young woman who has failed as an operatic soloist, to the occupation of "crystal singer" on the fictional planet Ballybran; the novel is based on short stories written in 1974 and is the first book McCaffrey set in her "Crystal universe". Alternatively, Crystal Singer is a trilogy named for its first book. Doubleday and Del Rey published U. S. book club and paperback editions within a few months of the first edition in 1982. WorldCat participating libraries report holding editions in French and Hebrew languages, published in the 1990s. While a schoolgirl, Anne McCaffrey enjoyed one year of piano lessons purchased by her Aunt, she studied voice for nine years, performed in the first music circus in 1949, once directed a play, worked for a record label, Liberty Music Shop. DuPont transferred her husband temporarily to Düsseldorf, Germany, in 1962/63, where Anne resumed vocal training but suffered a crisis when she was informed that a flaw in her voice would limit her in that avocation.
Regarding that experience, including some emotional trauma, her fictional character Killashandra Ree is autobiographical. McCaffrey divorced her husband in August 1970 and emigrated to the vicinity of Dublin, Ireland, in September with her second Dragonriders of Pern book nearly finished and a contract for the third; the White Dragon would complete her "original trilogy" with Ballantine Books in 1978 but for several years that work stalled. The markets for children and young adults provided crucial opportunities, as when editor Roger Elwood solicited contributions of short genre fiction to anthologies, she was able to deliver "The Smallest Dragonboy" and the four-part story of Killashandra: "Prelude to a Crystal Song", Continuum 1 "Killashandra – Crystal Singer", Continuum 2 "Milekey Mountain", Continuum 3 "Killashandra – Coda and Finale", Continuum 4 McCaffrey called the 1982 novel a "considerably expanded" version of the four-part work and acknowledged "the technical assistance of Ron Massey, Langshot Stables, Surrey" for its transformation.
In fact the first three sections of the novel—through Killashandra's return from her first experience cutting crystal in the field—are moderately revised and revised versions of the first and third 1974 stories, "Prelude to a Crystal Song" and "Milekey Mountain". In the second and fourth original stories she is a veteran of more than 100 years in the field. Whether and how she may be able to go on as a woman on vacation and as the miner of her claim are primary themes. Killashandra is a small town in north central Ireland, about 120 km northwest of Dublin. Killashandra Ree has spent ten years studying music and training to be a vocal soloist, anticipating interstellar celebrity. After a final exam she learns, she dreads a life limited to choral work and supporting operatic roles so she plans to exit both school and home planet discreetly. At the spaceport she meets a vital older man who uses perfect pitch, his occupational experience as a "crystal singer" on Ballybran, to identify an incoming space shuttle on the verge of explosion.
He treats her to a whirlwind romance and the experience of her home planet in ways unknown to her, but sincerely warns her against the high-status, high-income occupation that makes such a vacation possible for him. Further, one of its occupational hazards leaves him in a coma, but Killashandra determines to accompany his return home under life support, to investigate membership in the Heptite Guild of crystal singers for herself; the crystalline rock of Ballybran, when skilfully cut, is essential to advanced power and communications systems at the heart of interstellar civilization. Only the Guild "singers" can mine crystal: locate it, cut it with voice-controlled machinery. Killashandra's ability to sing perfect pitch meets one qualification, she knows, she passes other qualifying exams in the staging area on Ballybran's moon. Travel to Ballybran itself, however, is forbidden to all but its resident singers and supporting population, about 30,000 people; the moon-side orientation program secretly explains why: a native spore soon invades the human body and causes genetic mutations.
Some newcomers will die of the initial infection and many will adapt only with a mix of permanent symptoms such as vastly increased visual acuity along with complete deafness. Those who adapt to symbiotic life may become singers; the symbiont maintains its host for hundreds of years, but only on Ballybran. Full adaptation brings remarkable benefits, including increased sensory perception, rapid tissue regeneration and a vastly prolonged life expectancy, but it renders all hosts sterile, causes severe memory loss and dementia. After full adaptation with the symbiont, mining Ballybran crystal is a dangerous occupation. Beside the risks associated with other mining operations, there are frequent storms with high winds that may cause crystal deposits to resonate: "sonic storms" that may impair the symbiont and drive the singer mad; the Guild provides life support for physically disabled or insane members, many aspects of the industry are centralized, everyone begins with big debts. Yet singers in the field are solo adventurers who establish private claims, work them in secret, sometimes amass great fortunes.
Killashandra and thirty others make the commitment. The story follows her