Database Record For Music From An App - 895 Words

in databases isn’t a big yard, but it is typically a number, name, or a combination characters. These characters can describe aspects of objects like a song or a photograph, and they can describe activities like a business transaction. Each field is provided with a field name, and an example of one of these names would be WalmartNumber or EmployeeDescription. Spaces should never be involved when it comes to field names. A group of similar fields that may describe some item or activity, is called a record. Using records, you can make a more complete description of an item or activity. A database record kind of looks similar to a source on a reference page. An example of a database record for music from an App would combine fields for Time,†¦show more content†¦Attributes are usually characteristics of entities, and the particular value of an attribute is called a data item, and this can be located in the fields of the record describing an entity. Database keys are impo rtant to a database management system because it is a field in a table that is used to classify a record. Database keys matter because database management systems often have trouble confirming that records are not made twice. Look at it this way, if you sign up for fantasy football for ESPN, and then forget that you signed up and then try and sign up again, this is where database keys should help you. The database key will make sure that you won’t get another email informing you that you signed up because it will recognize your email, and this will keep you from receiving multiple emails about you signing up for fantasy football. Database management systems provide a primary key as well, and this key is a field inside the database table that exclusively identifies each record. Each of these records inside a table must have an exclusive entry in the primary key field. The primary key always makes a distinction between records so that records can be effortlessly and correctly a ccessed, organized, and manipulated (MindTap). An example for using primary keys would be using worker records as the primary key, and this would guarantee that every worker is identified only one time, and when a worker uses email addresses as the primary key for

The Forbidden Game The Hunter Chapter 6 Free Essays

The room behind the door had golden-ocher walls. On one of them an African mask hung in primitive glory. Several clay sculptures rested on built-in teak shelving, including a bust that could have been Nefertiti. We will write a custom essay sample on The Forbidden Game: The Hunter Chapter 6 or any similar topic only for you Order Now Leather cushions were tossed around the floor, one resting beside a complete home gym. It was Dee’s bedroom. The bust was one that Dee’s grandmother, Aba, had made of Dee. There was a stack of textbooks by the bed and a pile of half-completed homework on the nightstand. Jenny loved this room, loved to see what Aba would bring Dee next from her travels. But seeing it now was unnerving. Once they were inside, the door shut behind them-and disappeared. When Jenny turned at the sound of slamming, she saw nothing but a blank ocher wall where the door used to be. â€Å"Great-now we’re trapped,† Jenny said. Dee was frowning. â€Å"There must be a way out.† They tried the window. Instead of the Ice Age outside it was the ordinary view from Dee’s upstairs room. Jenny could see the grass below, illuminated by a porch light. But the window wouldn’t budge, or-as they discovered when Dee swung a ten-pound barbell against it-break. â€Å"So now what?† Jenny said. â€Å"Why are we in your room? I don’t understand what’s going on.† â€Å"If this place is like a dream and we know we’re dreaming it, we should be able to change things. With our minds. Maybe we’re supposed to make a way out of here.† They both tried, with no results. No matter how hard Jenny concentrated on making the door reappear, nothing happened. â€Å"I give up.† Dee took off her jacket and flopped on the bed-as if this place really were her room. Jenny sat beside her, trying to think. Her brain wasn’t working properly-shock, she supposed. â€Å"All right, look. That guy said we’re each supposed to face our nightmares. So this must be-† she began, but Dee interrupted. â€Å"What else did he say? Who is he?† â€Å"Oh. Do you †¦ do you believe in the devil?† Dee gave her a scornful look. â€Å"The only devil I know is Dakaki, and he only makes you horny. According to Aba.† â€Å"I think he wanted me to believe he was the devil,† Jenny said softly. â€Å"But I don’t know.† â€Å"And he wants us to play the Game with him? Just like the one in the box, only for real?† â€Å"If we get to the turret by dawn, we can go,† Jenny said. â€Å"If we don’t, he wins.† She looked at the other girl. â€Å"Dee, aren’t you scared?† â€Å"Of the supernatural?† Dee shrugged. â€Å"What’s to be scared of? I always liked sword-and-sorcery stuff; I’m glad it’s true. And I don’t see why we can’t beat him. I swore to kick the Shadow Man’s ass before-and I’m going to. You wait.† â€Å"But-this is all so crazy,† Jenny said. Now that she had time to sit and think, reaction was setting in. She was shaking again. â€Å"It’s like you’ve always thought, sure, maybe there’s ESP, maybe there’re strange things out there in the dark. But you never think it could happen to you.† Dee opened her mouth, but Jenny rushed on. â€Å"And then it does and everything’s different and it isn’t possible and it’s still happening.† She looked hard into the dark eyes with the slightly amber-tinted whites, desperate for understanding. â€Å"That’s right,† Dee said briefly, returning Jenny’s gaze. â€Å"It is happening. So all the rules are changed. We have to adapt-fast. Or we’re not going to make it.† â€Å"But-â€Å" â€Å"But nothing, Jenny. You know what your problem is? You think too much. There’s no point in talking about it anymore. What we have to worry about now is surviving.† Dee’s straightforward, razor-sharp mind had gone to the heart of the matter. What was happening was happening, possible or not. They had to deal with it if they wanted to live. Jenny wanted to live. â€Å"Right,† she breathed. â€Å"So we adapt.† Dee flashed her brilliant smile. â€Å"Besides, it’s kind of fun,† she said. â€Å"Don’t you think?† Jenny thought of Tom cowering from something invisible on the floor. She leaned her forehead onto her fingertips. â€Å"Something must scare you, though,† she said after a minute, looking up. â€Å"You drew a nightmare.† Dee picked up a beaded Ndebele bracelet from the nightstand and examined it. â€Å"My mom scares me. Really,† she added, at Jenny’s disgusted look. â€Å"Her stuff at the university-computers and all.† Dee glanced toward the window. Jenny saw only the curtains made of applique cloth from Dahomey. â€Å"You’re afraid of technology?† she said in disbelief. â€Å"I am not afraid of technology. I just like to be able to deal with things-you know, directly.† Dee held up a slender clenched fist, and Jenny looked at the corded tendons in the dark forearm. No wonder Dee wasn’t afraid of the â€Å"sword and sorcery† stuff-she fit right into the heroic mythos. â€Å"It’s the same reason I won’t go to college,† Dee said. â€Å"I want to work with my hands. And not at anything arty.† â€Å"Aba would smack you,† Jenny told her. â€Å"And your brain’s as good as your hands-† She broke off because Dee was once again looking at the window. â€Å"Dee, what did you draw?† she said, sitting up straight and finally asking the question she should have asked in the first place. â€Å"Nothing’s happening.† â€Å"What did you draw?† A red light was blossoming outside the window, like the glow of a distant fire. Jenny whipped her head toward a crackling sound and saw that Dee’s stereo had begun to smoke. â€Å"What-?† Jenny breathed. Dee was already moving toward the window. â€Å"What’s going to happen?† Jenny yelled, jumping up. She had to yell because of the throbbing sound that suddenly permeated the room. It resonated in Jenny’s bones. Outside, a silhouette appeared against the light. â€Å"Dee!† Jenny grabbed for the other girl, trying to pull her away from the window. She was panicking and she knew it. The thing outside was huge, blocking out the stars, dull black and non-reflective itself but haloed in its own red glow. The eucalyptus trees outside were thrashing in a violent wind. â€Å"What is it?† Jenny screamed, dimly aware that Dee was clutching back at her. But that was a stupid question. What could it be, hovering outside a second-story window, shaped like a half-sphere with the flat side down? As Jenny watched, six beams of light, bright as phosphorous flares, shot out from the bottom of the thing. One of the lights swung around to shine directly through the window. Jenny was blinded, but she heard the shivery tinkle of glass, and a blast of wind blew her hair straight back. The window’s gone, she thought. The wind roaring past her was freezing and felt somehow electric. Behind her a brass tray fell off a wooden stand with a crash. That was when Jenny found she couldn’t move. The light was paralyzing her somehow, her muscles going like jelly. There was the strong pungent odor of an electric storm. She was losing consciousness. I’m going to die, she thought. I’ll never wake up. With a great effort she turned her head toward Dee for help. Dee was facing the light stiffly, pupils contracted to pinpoints. Unable to help Jenny or herself. Fight, Jenny thought weakly. This time fainting was like oozing into a black puddle of sludge. The room was round. Jenny was lying on a table that conformed to her body’s shape. Her eyes were burning and tearing, and she felt a great disinclination to move. A white light shone down on her from above. â€Å"It’s exactly the way I thought it would be,† a husky voice said. Jenny fought off the lassitude enough to turn her head. Dee was on another table a few feet away. â€Å"It’s just like what I’ve read about the Visitors, just like my dreams.† Jenny had never thought much about UFOs at all, but this wasn’t what she would have expected. The only thing she knew about aliens was that they-did things-to people. â€Å"So this was your nightmare,† she said. Dee’s perfect profile was tilted up toward the white spotlight above her, looking exactly like an Egyptian carving. â€Å"Oh, brilliant,† she said. â€Å"Any other deductions?† â€Å"Yes,† said Jenny. â€Å"We’ve got to get out of here.† â€Å"Can’t move,† Dee said. â€Å"Can you?† There were no obvious restraints, but Jenny’s arms and legs were too heavy to lift. She could breathe and move her torso a little, but her limbs were dead weights. I’m scared, Jenny thought. And then she thought about how Dee must feel. As an athlete, physical helplessness was Dee’s worst fear. The strong, slim body that she’d cultivated with so much care was no use at all to her now. â€Å"This place-it’s so sterile,† Dee said, her nostrils flaring. â€Å"Smell it? And I bet they’re like hive insects, all the same. If we could just get up to fight them †¦ but they’ve got weapons, obviously.† Jenny understood. Muscle and ingenuity wouldn’t do anything against sterile, hellishly efficient technology. No wonder it was Dee’s personal nightmare. Jenny noticed a movement in her peripheral vision. They were small-Summer’s size. To Jenny they looked like demons: hairless, with slender bodies and large glittering dark eyes. No noses, slits for mouths. Their skin glowed like bad mushrooms-very pale mushrooms grown in a cellar without ever seeing the light. Jenny noticed an odor of almonds. They were alive, but they were as alien and wrong as the bleached things that crawl around at the bottom of caves. Just the sight of them struck Jenny with sick terror. They were naked, but Jenny couldn’t see anything that would make them male or female. Their bodies were hideous blanks, like dolls’ bodies. They’re its, Jenny thought. Somehow, Jenny knew they were going to hurt her. Dee made a faint sound. Jenny turned toward her. It was easier than it had been the other time, and after an instant she realized that the spotlight above her had dimmed fractionally. Dee’s light was brighter, because Dee was trying to get away. Jenny had never seen Dee frightened before-even in the parlor Dee had looked more alert than anything else. But now Dee looked like a terrified animal. Droplets of sweat stood on her forehead with the effort to move. The more she thrashed, the brighter the light above her got. â€Å"Dee, stop it,† Jenny said, agonized. She couldn’t stand to watch. â€Å"It’s just a dream, Dee! Don’t let it get to you.† But Julian had said if they got hurt in the dream, they got hurt for real. The Visitors were clustering around Dee, but they didn’t seem alarmed. They seemed absolutely indifferent. One of them pushed a cart over to the far side of Dee’s table. Jenny saw a tray of gleaming instruments. God-no, Jenny thought. Dee collapsed back on the table, exhausted. Another being picked up something long and shiny from the tray, examined it with lustrous black eyes. It flexed the thing a few times like a painter making practice runs with a brush. It seemed dissatisfied, although with its masklike face Jenny didn’t know how she could tell this. Then it casually flicked the thing up Dee’s thigh and Dee screamed. It was like hearing your father scream. Jenny was so frightened that she tried to get up, and only succeeded in disarranging her legs slightly. One of the beings repositioned them carefully, stretching her feet toward the bottom corners of the table. She had never felt so open, so utterly vulnerable. Dee’s black spandex legging gaped where the thing had cut it. Jenny could see blood. The being handed the instrument to one of the others, which took it away. If they were talking or communicating, Jenny couldn’t sense it. Certainly nobody tried to communicate with Dee or Jenny. They were moving around again. One of them-the same one who had cut Dee?-took up a new instrument and went to Jenny’s table. With a swift, deft movement the being touched the instrument to Jenny’s hand. Jenny felt a pinch. Then the probe went in her ear. Outraged, Jenny tried to roll her head away, but small hands-strong as claws inside mushroom flesh-held her forehead. She felt the probe go in deeper, and she squirmed frantically. It touched her eardrum and hurt like a Q-tip stabbed too deep. She was completely helpless. Whatever they wanted to do to her, they would do. Tears of pain and fury trickled out of her eyes, down her temples. They put the probe in her other ear. One of them dabbed at her eye, holding the lid open. Jenny felt the touch of cool metal against her eyeball. â€Å"It’s just a dream,† she called to Dee, almost sobbing, when the probe was withdrawn. â€Å"It’s not real!† She couldn’t hear any answer from the other table. What kind of game was this, where you didn’t have a chance? Julian had talked about â€Å"getting through† the nightmares, but Jenny didn’t think that meant just waiting for them to pass. She was supposed to do something, but she didn’t know what, and she couldn’t move. And she didn’t think she and Dee were going to survive this if they just lay here. â€Å"What do you want from us?† she shouted. â€Å"What are we supposed to do?† There was a shifting among the Visitors. A new kind of being had arrived. Taller than the others, clearly in command, with skin as white as wax. Its fingers were twice as long as a human’s. Although Jenny got only a glimpse of its face, it looked more menacing than the other kind, its features even more exaggerated. It picked something up from the instrument cart and went over to the far side of Dee’s table. It looked up at Jenny, and she saw its eyes were blue. Not glittering black like the other beings’ eyes. Blue lakes endlessly deep, deep as a mountain is high. Eyes that looked inside you. Jenny stared back, her own eyes widening. Then she saw what it was holding. A needle. Wire-thin, murderously long, longer than the needle for a spinal tap. The tall Visitor was holding it over Dee’s stomach. Dee’s stomach was heaving wildly in a fight for breath. Her khaki T-shirt was sticking to her body as she writhed in a futile attempt to escape. Her sweat-soaked hair glistened like mica in the light. â€Å"Don’t touch her!† Jenny cried. To watch it happen to Dee was worse than having it happen to herself. The needle hovered just below Dee’s navel. Dee’s abdomen went concave trying to avoid it. Dee made rocking, shifting motions as if trying to shimmy up the table, but she only moved in place. The light above her intensified, and abruptly her struggles became weaker. â€Å"You bastard! Leave her alone!† What can I do? Jenny thought. She had to stop this-but how? The light. It came to her suddenly. The light above her had dimmed as Dee’s had brightened. Maybe she could move now. And if she could move – She began to rock. She had some control over her body. Not much. Her arms and legs were still useless, like huge pieces of dead meat attached to her. But she could move her trunk and her head and neck. Using all her strength, she rocked her weight from one side to the other. Dee saw her. All the other eyes in the room, all those slanted liquidy black eyes, and the one pair of deep blue, were on Dee’s stomach, on the needle. But Dee’s thrashing head had turned toward Jenny, and just for a moment the two of them were looking at each other, communicating without words. Then Dee began to struggle again. The harder Dee fought, the brighter the light over Dee. The brighter the light over Dee, the dimmer the light over Jenny. Fall off this table and you’ll have no way to control it, Jenny’s mind told her. A broken arm or leg, at least, and maybe a broken nose. You’ll smash into the floor facedown. She kept on rocking. Maybe Dee thought she was just trying to get away, but what Jenny cared about was distracting them. Stopping that thing with its too-long fingers from putting the needle in Dee. If she hurt herself they’d have to come deal with her. They’d leave Dee alone. She swung her torso harder and harder, like a beetle trying to upend itself. Dee was fighting madly, yelling out insults to keep the aliens’ attention. The light above Jenny dimmed further, Jenny surged violently-and felt her momentum take her over the edge. For a moment she teetered there, balanced on her side, then the deadweight of her arms and legs decided the issue, and she felt herself begin to fall. There was a burst of startled movement from the aliens, and the light flamed into brightness above her. It didn’t matter in the least. It wasn’t her muscles that were in charge, it was the law of gravity. Something nobody could argue with. Jenny thought. Searing illumination was reflecting off the white floor, and Jenny shut her eyes as that floor seemed to come up to meet her. She flinched away from the moment of impact. When the impact didn’t come, she opened her eyes. She was floating, facedown, an inch or so from the floor. Suspended. Paralyzed. The aliens were scuttling around hysterically, as if they weren’t programmed to deal with this. As if they were as surprised by her midair arrest as she was. The painful reflection on the floor softened. Jenny was still floating. It was a very strange sensation. The small aliens were still moving around in consternation-Jenny could see by their feet. A bunch of them crowded between the tables and lifted Jenny back to hers. She was positioned too high-she felt her ponytail hanging over the edge of the table. And the light above her was dimmer. Maybe somebody who hadn’t been staring up at it for half an hour wouldn’t notice, but Jenny did. The blue-eyed alien with the needle was beside her. She expected it to touch her, but it didn’t. It just looked down, and Jenny looked back. Why didn’t you let me fall? she thought. Abruptly the tall alien turned away. It motioned to the others, then walked out the octagonal doorway of the round room. Several of the small ones followed it, pushing the cart. Several others came and poured green liquid into Jenny’s mouth. It tasted like sugar and iodine. Jenny spit it out. They restrained her head and poured her mouth full again. This time she shut her lips, holding the liquid inside her mouth, doing her best not to swallow any. She could have struck out at them-she could feel her fingers again-but she pretended she couldn’t move. And then, blessedly, they went away. Jenny turned her head and spat her mouthful out. Her lips and tongue were numb. She saw Dee doing the same. They looked at each other, then at the lights. â€Å"Both dimmer,† Jenny whispered. Dee nodded. Then, eyes on the doorway, they squirmed and rocked themselves off the tables. It wasn’t easy, but with the lights this dim, it was possible. Jenny, with no training in how to fall, bruised her arm and knee. But Dee was already pulling her up, out of the influence of the white light. Outside its circle, Jenny could move freely. â€Å"Look,† she said, seizing Dee’s arm. It was a door, concave, set in the wall that had been behind Jenny’s head. It looked like an airplane door, which Jenny recognized because she’d once spent five hours studying one when her family flew to Florida on vacation. And which was absurd, Jenny thought fretfully. Why should aliens have airplane doors? Dee wasn’t worrying about it-she was moving levers and things. The door swung away outward. Jenny shrieked. She’d never liked heights, and this was much higher than she’d ever been in the open air. She could see clouds below. But we both went for the door instinctively, she thought. It must be right. We went into Dee’s room and the door disappeared. This is the first door we’ve seen since. It’s got to be the way out. She still felt faint when she looked down. â€Å"I don’t care; I’d rather die than stay here. Besides, I always wanted to skydive,† Dee said, grabbed Jenny’s hand, and jumped. Jenny really screamed then. Whistling wind slapped her face. Jenny’s eyes screwed shut against it. Everything was icy cold around her. She felt weightless, but she knew she was falling. If this is flying, I don’t think I like it – She didn’t exactly faint then, but things got very confused. She couldn’t see or hear anything until she hit an ocher-painted door with a thud, Dee tumbling behind her. From their direction and velocity they might have been thrown through Dee’s bedroom window by a giant fist. The door opened as she struck it, and she and Dee both fell into the hallway. The Haunted Mansion hallway. Dark as a crypt. Jenny stared into the golden glow of Dee’s bedroom- -then the door whisked by her nose and slammed shut. She and Dee lay panting while their eyes gradually adjusted to the dimness. Dee leaned over and slowly, deliberately punched Jenny in the biceps. â€Å"We did it, killer,† she said. â€Å"You saved me.† â€Å"We’re alive,† Jenny said wonderingly. â€Å"We got through. Dee-do you realize what happened? We won.† â€Å"Of course,† Dee said. She poked her fingers into the hole in her leggings, and Jenny saw that the cut was still there, the blood drying. Then Dee flipped up her shirt. Jenny could count ribs under the velvety night-dark skin, below Dee’s dark blue sports bra. But there was no mark above the navel. â€Å"I told you, you saved me. That was my worst nightmare-those things poking at me, and me not being able to stop them.† â€Å"We both did it-by using our brains,† Jenny said. â€Å"Anyway, now we know what to do in the nightmares. Once we’re inside we look for a door-any door. Hey, what’s that?† A scrap of paper showed white against the black carpet. Jenny smoothed it out and saw it was a drawing, done in crayons. A black thing like a bowler hat was hovering above stick trees, with rays of scribbled light around it. â€Å"I never could draw very well,† Dee said. â€Å"But you get the idea. Now what do we do?† Fear of the aliens had left its mark on Dee’s face, but she also looked exhilarated, triumphant. Ready for anything. Jenny was suddenly very grateful to have this beautiful, brave girl on her side. â€Å"We find the others,† she said. â€Å"We look for another door.† She dropped the crumpled paper on the floor and stood, offering Dee a hand up. An unseen clock struck eleven. Jenny stiffened. â€Å"That’s it-the clock I heard in the parlor. It’s counting off the hours. He said dawn was at six-eleven.† â€Å"Seven hours and change,† Dee said. â€Å"Plenty of time.† Jenny said nothing, but her little fingers tingled. She couldn’t explain it, but she had the feeling Dee was going to be proved very wrong. The hallway seemed to stretch forever in both directions. The stairway had disappeared. â€Å"It’s changed,† she said. â€Å"It keeps changing-why?† Dee shook her head. â€Å"And who knows which way to go? We’d better separate.† Jenny nearly objected to this, but after what they’d been through-well, she should be able to handle a hallway alone. She started down it and immediately lost sight of Dee. It seemed almost normal to be walking down an impossible black-carpeted hall like something out of a horror movie. I guess you can get used to anything, Jenny thought. After the blinding-white sterility of the alien ship, this dim place looked almost cozy. There were no doors. Even the monster one, which should have been somewhere back this way, had disappeared. The tiny flames of the candles went on endlessly ahead. As Jenny stopped under one to rest, she thought suddenly of the riddle she’d pushed to the back of her mind earlier. If it would get one of them out of here, she ought to try to solve it. I am just two and two. I am hot. I am cold. I’m the parent of numbers that cannot be told. I’m a gift beyond measure, a matter of course, And I’m yielded with pleasure-when taken by force. What could it possibly mean? Two and two, hot and cold-it was probably something childishly simple. â€Å"How do you like the Game so far?† The voice was like silk-wrapped steel. Jenny turned fast. Julian was leaning against the wall. He’d changed clothes again; he was wearing ordinary black jeans and a black T-shirt with the sleeves rolled up. Seeing him suddenly was like the first moment in the morning when the shower flicks on, a shock of cold awareness. â€Å"Was it you?† she said. â€Å"In the ship up there?† â€Å"That would be telling,† he said, but for an instant his eyelids drooped, heavy lashes coming down. â€Å"Why didn’t you let me fall?† â€Å"Did you know your eyes are dark as cypress trees? That means you’re unhappy. When you’re happy they get lighter, they go all goldy-green.† â€Å"How would you know? You’ve never seen me happy.† He gave her a laughing glance. â€Å"Is that what you think? I’m a Shadow Man, Jenny.† While Jenny was trying to figure this out, he went right on. How to cite The Forbidden Game: The Hunter Chapter 6, Essay examples

Sexual Abstinence Essays - Midwifery, Fertility,

Sexual Abstinence Today's world is full of worries and problems which did not affect teens a generation ago. New problems keep appearing in today's world, such as STDs, increased pregnancy rates, and other factors facing teens who choose to have sex. Emotionally and physically teens and getting less developed before having sex and are not prepared for the serious problems which come along with their decision to have sex. No longer is it a matter which will just go away if we ignore it, but teen health and the health of our society depend on choices which today's teens make regarding sex. With so many diseases and problems facing today's world, abstinence is the only way to protect ourselves. Abstinence is a safe choice in preventing the possibility of pregnancy. One-tenth of young women between the ages of 15 and 19 get pregnant every year, 83 percent of these pregnancies are unwanted or unplanned. Half of the unmarried teens who get pregnant do so within six months of their first sexual experience. I n fact, between 1986 and 1990, teen childbearing increased by 16 percent. What's worse, pregnant teenagers often don't see a doctor until the time of delivery. The dangers of going through a pregnancy without seeing a doctor are not only serious to the mother and child, but may risk the lives of both. I'm doing the body count at 3 a.m. at Ben Taub [Hospital], said Dr. Hunter Hamill, and I can tell you that most of our (teen pregnancy prevention) programs aren't working. We have blood on our hands. (Feldman 1). Without seeing doctors or receiving correct pre-natal care, the risk of complications for mother and child nearly quadruple. Not only can these complications include still birth, but may also cause excessive bleeding and hemorrhaging of the mother. According to an article in America magazine, The place to begin combating teenage pregnancy is in the family, not a clinic. (Leone 19). Although parents seem to be afraid to talk to their children about sex, it is vital to the teens ' health. If teens feel their parents are reluctant to speak about sex, they may feel uncomfortable coming to theur parents with any problems or concerns about sex. Teens who feel they cannot speak to their parents about STDs or pregnancy can now speak confidentially with their doctor. Doctors are required to inform and treat teens with confidentiality if the teen seeks their help. Another serious problem surrounding teen sexual intercourse is the probability of AIDS and sexually transmitted diseases (STDs). Each year, three million teens are infected with STDs. Among 14- to 20-year-olds, chlamydia is the most common. It has no obvious symptoms, and can cause infertility if left untreated. Another common disease is herpes, which causes sores and painful swelling of the genitals. Its symptoms can be managed, but not cured. Fifteen percent of all teenage girls carry the virus that causes genital warts, another common STD. Gonorrhea, not uncommon in teens, is known to cause pelvic pain , discharge, and painful urination. It may leave its victims sterile. Perhaps even more serious is the disease Syphilis, which killed famous mobster Al Capone. It causes sores, rashes, brain and organ damage, and death. It can also harm an unborn child. AIDS (Acquired Immunodeficiency Syndrome) is a growing danger, and is by far the most serious sexually transmitted disease. Kids don't take AIDS seriously, said Dr. James W. Curran. One thing they do have is sex. They have sex. They have sex. They have sex. (Ferriss 16) AIDS is the sixth leading cause of death among 15- to 24-year-olds. Cases among teens have grown 62 percent in the past two years, and the number of teens with AIDS doubles every 14 months. A fifth of all AIDS victims in this country today are in their twenties, and since the disease takes two to ten years to develop, those victims contracted it in their teenage years. Even scarier is that, according to a study of 19 universities, one in 500 college students may carry the AIDS virus. With these frightening statistics, it's easy to see why many teens are choosing not to have sex. Many bold teenagers think they can totally

Using Significant Figures and Scientific Notation

Using Significant Figures and Scientific Notation When making a measurement, a scientist can only reach a certain level of precision, limited either by the tools being used or the physical nature of the situation. The most obvious example is measuring distance. Consider what happens when measuring the distance an object moved using a tape measure (in metric units). The tape measure is likely broken down into the smallest units of millimeters. Therefore, theres no way that you can measure with a precision greater than a millimeter. If the object moves 57.215493 millimeters, therefore, we can only tell for sure that it moved 57 millimeters (or 5.7 centimeters or 0.057 meters, depending on the preference in that situation). In general, this level of rounding is fine. Getting the precise movement of a normal-sized object down to a millimeter would be a pretty impressive achievement, actually. Imagine trying to measure the motion of a car to the millimeter, and youll see that,  in general, this isnt necessary. In the cases where such precision is necessary, youll be using tools that are much more sophisticated than a tape measure. The number of meaningful numbers in a measurement is called the number of significant figures of the number. In the earlier example, the 57-millimeter answer would provide us with 2 significant figures in our measurement. Zeroes and Significant Figures Consider the number 5,200. Unless told otherwise, it is generally the common practice to assume that only the two non-zero digits are significant. In other words, it is assumed that this number was rounded  to the nearest hundred. However, if the number is written as 5,200.0, then it would have five significant figures. The decimal point and following zero is only added if the measurement is precise to that level. Similarly, the number 2.30 would have three significant figures, because the zero at the end is an indication that the scientist doing the measurement did so at that level of precision. Some textbooks have also introduced the convention that a decimal point at the end of a whole number indicates significant figures as well. So 800. would have three significant figures while 800 has only one significant figure. Again, this is somewhat variable depending on the textbook. Following are some examples of different numbers of significant figures, to help solidify the concept: One significant figure49000.00002Two significant figures3.70.005968,0005.0Three significant figures9.640.0036099,9008.00900. (in some textbooks) Mathematics With Significant Figures Scientific figures provide some different rules for mathematics than what you are introduced to in your mathematics class. The key in using significant figures is to be sure that you are maintaining the same level of precision throughout the calculation. In mathematics, you keep all of the numbers from your result, while in scientific work you frequently round based on the significant figures involved. When adding or subtracting scientific data, it is only last digit (the digit the furthest to the right) which matters. For example, lets assume that were adding three different distances: 5.324 6.8459834 3.1 The first term in the addition problem has four significant figures, the second has eight, and the third has only two. The precision, in this case, is determined by the shortest decimal point. So you will perform your calculation, but instead of 15.2699834 the result will be 15.3, because you will round to the tenths place (the first place after the decimal point), because while two of your measurements are more precise the third cant tell you anything more than the tenths place, so the result of this addition problem can only be that precise as well. Note that your final answer, in this case, has three significant figures, while none of your starting numbers did. This can be very confusing to beginners, and its important to pay attention to that property of addition and subtraction. When multiplying or dividing scientific data, on the other hand, the number of significant figures do matter. Multiplying significant figures will always result in a solution that has the same significant figures as the smallest significant figures you started with. So, on to the example: 5.638 x 3.1 The first factor has four significant figures and the second factor has two significant figures. Your solution will, therefore, end up with two significant figures. In this case, it will be 17 instead of 17.4778. You perform the calculation then round your solution to the correct number of significant figures. The extra precision in the multiplication wont hurt, you just dont want to give a false level of precision in your final solution. Using Scientific Notation Physics deals with realms of space from the size of less than a proton to the size of the universe. As such, you end up dealing with some very large and very small numbers. Generally, only the first few of these numbers are significant. No one is going to (or able to) measure the width of the universe to the nearest millimeter. Note This portion of the article deals with manipulating exponential numbers (i.e. 105, 10-8, etc.) and it is assumed that the reader has a grasp of these mathematical concepts. Though the topic can be tricky for many students, it is beyond the scope of this article to address. In order to manipulate these numbers easily, scientists use  scientific notation. The significant figures are listed, then multiplied by ten to the necessary power. The speed of light is written as: [blackquote shadeno]2.997925 x 108  m/s There are 7 significant figures and this is much better than writing 299,792,500 m/s. Note The speed of light is frequently written as 3.00 x 108  m/s, in which case there are only three significant figures. Again, this is a matter of what level of precision is necessary. This notation is very handy for multiplication. You follow the rules described earlier for multiplying the significant numbers, keeping the smallest number of significant figures, and then you multiply the magnitudes, which follows the additive rule of exponents. The following example should help you visualize it: 2.3 x 103  x 3.19 x 104   7.3 x 107 The product has only two significant figures and the order of magnitude is 107  because 103  x 104   107 Adding scientific notation can be very easy or very tricky, depending on the situation. If the terms are of the same order of magnitude (i.e. 4.3005 x 105  and 13.5 x 105), then you follow the addition rules discussed earlier, keeping the highest place value as your rounding location and keeping the magnitude the same, as in the following example: 4.3005 x 105   13.5 x 105   17.8 x 105 If the order of magnitude is different, however, you have to work a bit to get the magnitudes the same, as in the following example, where one term is on the magnitude of 105  and the other term is on the magnitude of 106: 4.8 x 105   9.2 x 106   4.8 x 105   92 x 105   97 x 105or4.8 x 105   9.2 x 106   0.48 x 106   9.2 x 106   9.7 x 106 Both of these solutions are the same, resulting in 9,700,000 as the answer. Similarly, very small numbers are frequently written in scientific notation as well, though with a negative exponent on the magnitude instead of the positive exponent. The mass of an electron is: 9.10939 x 10-31  kg This would be a zero, followed by a decimal point, followed by 30  zeroes, then the series of 6 significant figures. No one wants to write that out, so scientific notation is our friend. All the rules outlined above are the same, regardless of whether the exponent is positive or negative. The Limits of Significant Figures Significant figures are a basic means that scientists use to provide a measure of precision to the numbers they are using. The rounding process involved still introduces a measure of error into the numbers, however, and in very high-level computations there are other statistical methods that get used. For virtually all of the physics that will be done in the high school and college-level classrooms, however, correct use of significant figures will be sufficient to maintain the required level of precision. Final Comments Significant figures can be a significant stumbling block when first introduced to  students because it alters some of the basic mathematical rules that they have been taught for years. With significant figures, 4 x 12 50, for example. Similarly, the introduction of scientific notation to students who may not be fully comfortable with exponents or exponential rules can also create problems. Keep in mind that these are tools which everyone who studies science had to learn at some point, and the rules are actually very basic. The trouble is almost entirely remembering which rule is applied at which time. When do I add exponents and when do I subtract them? When do I move the decimal point to the left and when to the right? If you keep practicing these tasks, youll get better at them until they become second nature. Finally, maintaining proper units can be tricky. Remember that you cant directly add centimeters and meters, for example, but must first convert them into the same scale. This is a common mistake for beginners but, like the rest, it is something that can very easily be overcome by slowing down, being careful, and thinking about what youre doing.

Top-level Accommodations for Students in the USA

Top-level Accommodations for Students in the USA Best Students USA Accommodations Apparently, you are convinced that college accommodation is definitely one of the worst things you should survive while obtaining your degree. Besides doubtful neighbors, you will face living in a new space, which most of us imagine like small, uncomfortable room, where one is stuck for three or five years. Thus, most students try to hire flats or live at their parent’s place, which can be not very convenient due to additional time and transport expenses. Students’ accommodation is usually situated on the campus territory, so living there you have distinctively more time for sports, library attendance, writing essays or entertainment with your friends. So, what is it better to do in such situation and how to cope with this difficult choice of place for living? Before preferring any of your options concerning living conditions, we recommend you not to haste and find out everything about the accommodation at your college. You will be exceedingly surprised, but we want to astonish you with the fact that accommodations can be even architectural masterpieces. So meet these well-planned buildings, which dismantle all stereotypes. Baker House This building is designed and built for Cambridge students in Massachusetts. The project of the Baker House is executed by the Finnish architect Alvar Aalto. The architect embodied his ideas to provide a view out over the Charles River for each student and located the Baker house along the river. Besides, Alvar Aalto tried to avoid making typical and ordinary room design. Thus, he created 22 bedrooms on each floor. These bedrooms are saturated with individuality due to different shapes. The building has facade, made from red brick and fascinates all passersby by its look. That is so great for students to live in such an outstanding accommodation, which can become not only the place for living, but one of the vivid and bright recollections, concerning their years at the university. Peabody Terrace This students’ housing is located also in Harvard, Massachusetts and was designed by an architect Josep Luis Sert. Being the dean of the architecture school at Harvard University, Josep selected several room designs and arranged them into sections, creating terraces. The building has complex and peculiar design, but there can be hardly any students, who will not appreciate living at such astonishing place. Architects emphasize it outstanding design and ideological commitment and it will be an exciting experience for students to spend their time at this building. Noyes House This student dormitory is located in New York at the territory of the Vasar College campus. This building was designed by Eero Saarinen in slick crescent-shaped form. It was built in 1958 and symbolized the new breath to the residential life of the students. Though its architecture has respectful age, at those times it was a real breakthrough in the design of such buildings. Noyes House gives house for 178 students and is not a simple accommodation. It represents the first, progressive steps in the area of architecture masterpieces in regard to college and campus buildings. Olympia Avenue This is totally innovative residence hall for students, located in the Washington State. This building combines great interior design and superb interior planning, which presupposes lounges, kitchens, laundry facilities and studies, located on each floor. Except modern design this hall offers a lot of friendly features – storm water collection, geothermal heating and cooling, site restorations by means of natural landscaping and vegetation. So along with the living function Olympia Avenue executes the educational function, teaching its dwellers to take care about the environment. These students’ accommodations prove that there are always exceptions from the rules and college dormitories can be a great place for living. Just imagine how much friends you will make and what a great time you will spend, living in one of such dormitories at the campus area. Treat it as one of the adventures of your life and enjoy the best years at your college.

Transfer Funds Business Miscommunication Case Study

Transfer Funds Business Miscommunication - Case Study Example This cae study researches the issue of miscommunication that may happen while transfering of the funds. The researcher provides the explanation of the situation as following. There was miscommunication in the transfer of funds. The manager forgot to indicate the U.S dollars currency as the right transfer funds currency. The organization clerk did not clarify from the manager the proper currency to be used in the funds transfer. The finance department moved to right the wrong transfer funds act. The message receiver should exert enough efforts to clarify any vague or confusing message by contacting the message sender. The finance department should ensure that the message is vividly transmitted from the message sender to the message receiver. The researcher tries to conclude the research presented in the case study and suggests that summarizing the important points of the discussion mentioned in the case study, communication incorporates message sending issues. It is analyzed that the wrong message sending can and should be prevented. Understanding the special business communication principles enhances message clarity for employees. The message sender and receiver must do their best to ensure that the message receiver accepts the message in the same way that the message sender aims to. Evidently, all these parties must contribute to the clear message sending process of business communication and ensuring the business communication messages are received in crystal clear manner.

Controlling Carbon emissions Essay Example | Topics and Well Written Essays - 750 words

Controlling Carbon emissions - Essay Example Carbon sequestration is a component of CCS (carbon capture and storage). CCS aims at capturing carbon dioxide, transporting it to the place of storage and finally ensuring it is safely stored. Of all the available storage options, carbon geosequestration may be the most viable. This is because the process of geosequestration is characterized by ability to handle large volumes of gases at long periods of time. The process of geosequestration has not been commercially proven to be viable. However, it has been applied in processes of extraction oil. Carbon dioxide gas is injected into oil reservoirs. It pushes the oil up due to pressure improving the rate at which oil is flowing out. Carbon dioxide remains in the reservoirs hence, it is stored (Metz, B., Davidson, O., Swart, R., and Pan, J. 153). The process of carbon sequestration is being investigated in several parts of the world. Demonstrations are being undertaken to determine how safe and feasible this process is. The oldest demon stration has been operation since 1996 (Goulder. and Mathai, 36-37). This is the Sleipner project which store approximately 1 million tons of carbon dioxide annually. Canada has the largest project (Weyburn project) of carbon sequestration which stores about 1.5 million tons of carbon every year in its process of oil extraction. ... and Mathai, 38). Cost of Carbon Sequestration High costs pose a great challenge to carbon sequestration. It is estimated that a ton of carbon dioxide costs more than 30 dollars to sequestrate (Grubler, Nakicenovic, and Nordhaus, eds. 112). There are great technical difficulties in reducing these costs given current levels of technology. There is technological knowhow and mechanisms of separating carbon dioxide and hydrogen. However, the capital and costs of operations are quite high. This is mainly because these technologies are preferably applied in fossil fuel combustion. There are is need for more research and development in this field in order to reduce the costs of carbon sequestration. Costs of mitigating leakages of carbon dioxide form the ground are also very high. If this gas’ concentration is stabilized at double preindustrial levels, a 1% leakage is tantamount to around 850 billion dollars annually up to 2095 (Kauppi 98).therefore, a leakage of around 1 percent or l ess poses an intolerable transfer of cost to future generations. However, there is no empirical evidence that 1 % or less carbon dioxide is leaked from reservoirs. This further increases the uncertainty of costs meaning that the economic burden of carbon sequestration might even be higher than anticipated (Kauppi 105). Potential problems of carbon sequestration There are three main problems of carbon sequestration. These are; Storage security, heightened energy consumption and lack of large-scale practicality. Storage security involves the potential danger of storing carbon dioxide at very high pressure levels. Any technology used in injecting carbon dioxide is susceptible to human errors. Such an error would cause loses in property worth millions and thousands of