Principles of Dimensional Modeling

Dimensional modeling is system of a logical design used by several data warehouse designers for their commercial OLAP products. DM is considered to be the single practicable technique for databases that are intended to support end-user queries in a data warehouse. It is quite dissimilar from entity-relation modeling. Though ER is very functional for the transaction capture and the data administration phases of creating a data warehouse, but it should be shunned for end-user delivery.This paper explains the dimensional modeling and how dimensional modeling technique varies/ contrasts with ER models. Dimensional Modeling technique is a preferred choice in data warehousing. Basically, it is a technique of logical design which presents the data in a standard, intuitive framework that allows for high-performance access. It is intrinsically dimensional, and it sticks on to a discipline that uses the relational model with some significant restrictions.In each DM, there is one table with a m ultiple key, called the fact table, and a set of smaller tables called dimension tables. Each dimension table consists of a single-part primary key that corresponds precisely to one of the components of the multipart key in the fact table. This characteristic of star-like structure is generally called a star join. Due to multipart primary key made up of two or more foreign keys in fact table, it always articulates a many-to-many relationship.The most valuable fact tables include one or more numerical measures that crop up for the permutation of keys that delineate each record. Dimension tables have explanatory textual information. Dimension attributes are used as the source of most of the interesting constraints in data warehouse queries, and they are virtually always the source of the row headers in the SQL answer set. Dimension Attributes are the various columns in a dimension table. In the Location dimension, the attributes can be Location Code, State, Country, Zip code.Normally the Dimension Attributes are used in report labels, and query constraints such as where ‘Country=US'. The dimension attributes also contain one or more hierarchical relationships. One has to decide the subjects before designing a data warehouse. In DM, a model of tables and relations is constituted with the purpose of optimizing decision support query performance in relational databases, relative to a measurement or set of measurements of the outcomes of the business process being modeled.Whereas, conventional E-R models are composed to eradicate redundancy in the data model, to facilitate retrieval of individual records having certain critical identifiers, and therefore, optimize On-line Transaction Processing (OLTP) performance. The grain of the fact table is usually a quantitative measurement of the outcome of the business process being analyzed in a DM. The dimension tables are generally composed of attributes measured on some discrete category scale that describe, qualify , locate, or constrain the fact table quantitative measurements.Ralph Kimball views that the data warehouse should always be modeled using a DM/star schema. Kimball has affirmed that though DM/star schemas have the better performance in comparison to E-R models, their use involves no loss of information, because any E-R model can be signified as a set of DM models without loss of information. In E-R models, normalization through addition of attributive and sub-type entities destroys the clean dimensional structure of star schemas and creates snowflakes, which, in general, slows down browsing performance.But in star schemas, browsing performance is protected by restricting the formal model to associative and fundamental entities, unless certain special conditions exist. The dimensional model has a numerous important data warehouse advantages which the ER model is deficient in. The dimensional model is an expected, standard outline. The wild variability of the structure of ER models m eans that each data warehouse needs custom, handwritten and tuned SQL. It also means that each schema, once it is tuned, is very vulnerable to changes in the user's querying habits, because such schemas are asymmetrical.By contrast, in a dimensional model all dimensions serve as equal entry points to the fact table. Changes in users' querying habits don't change the structure of the SQL or the standard ways of measuring and controlling performance (Ramon Barquin and Herb Edelstein, 1996). It can be concluded that dimensional modeling is the only feasible technique for designing end-user delivery databases. ER modeling beats end-user delivery and should not be used for this intention. ER modeling form the micro relationships among data elements thus it is not a proper business model (Ramon Barquin and Herb Edelstein, 1996).

Say No to the Death Penalty

Counting the seconds and minutes to your death. Inhaling your last breath. The next thing you know, the prison doctor has just injected a lethal drug into you. How do you not feel pain, empathy or sadness? But, you know that the doctor brushes it off as if it nothing happened. All because of something we call ‘The Death Penalty.† The death penalty affects people who are wrongly convicted, the positive affect because there isn’t a death penalty in our society and human morality. How do you feel about innocent people dying? Innocent people are wrongly convicted on a daily bases, so why put these people in jail. Those who opposed this argument say †the people who commit a crime, deserve to die. ‘Six Canadian prisoners were convicted of a dangerous crime and later released due to their innocent. The six Canadians were condemned for the first degree murder and if there were death penalty then these six innocent people would have died. Another reason is that the prisoners should have the time to prove their innocence. I say this because after the trial. If new evidence is found then it’s very difficult to start another trial. It’s a life of a person in your hands and nothing should be neglected. Such as David Milgaard who was sentenced to life in prison. He was the suspected killer for the murder of Gail Miller. He spent 22 years in prison and was freed by DNA evidence. Once you go to prison, it makes a profound impact on your life. Have you read the human rights from the United Nations? In the third law it states †Any person right to life, liberty and security of person.† If Canada, reinstates the death penalty that's violating the human rights. It would be a very embarrassing moment for Canada for all we stand for and worked for. We are a country that is highly respected and is known for fighting for our rights. We have all the right to life. Do you think the death penalty affects things in our society? First reason is that there are fewer murders because there is not the death penalty. Since, there is no death penalty in Canada; the murder rate has decreased since 1970's. In 2009, the murder rate in Canada was 1.81 homicides per 100.000 populations. If we compare the static between Brazil is a big difference. Canada was 1.81 homicides and Brazil at 25.2homicide rates. Also, Brazil has no death penalty since 1988.

Interpersonal communication Essay

The book basically talks about the different ways on how to win friends and become popular. Dale Carnegie gives different tips on how to make different people like you, and how to make others accept and believe in what you are thinking. Carnegie basically makes it easier for readers to understand more effective relationship styles. Carnegie used to teach general public speaking. However, he realized that such wasn’t enough for effective business and felt that his students lacked the skill of simply making friends with new people, which is why he made a book on how to make new friends and other relational issues. Dale Carnegie also felt that he lacked such skills himself. So this is a two way experience for him, both teaching and learning at the same time. Digging in to the deeper purpose of creating such book, the Carnegie Institute of Technology made a study which showed that a financial successful person owes 15 percent to their technical knowledge and the rest to â€Å"skill in human engineering-to personality and the ability to lead people† (Carnegie, 1964). Another reason was that, it is easy to find applicants who had the perfect skills for their jobs- engineering, medicine, accounting, you name it, there are plenty of skilled professionals out there. However, there are not a lot who possess such skills and at the same time have the ability to have effective interpersonal communication and relational skills, which is why Dale Carnegie developed a book which serves as a manual for those who lack such skills. Lastly, there is a need for a book which basically serves as a guide for dummies on how to get other people to like them and how to find more friends. Becoming an effective leader is also a part of what the book teaches, and is what readers will get out of reading it. During the first part of Dale Carnegie’s â€Å"How to Win Friends and Influence People†, he talks about the basic styles and techniques that you can handle people. He basically had three principles in this topic. The first principle is to work with people without criticizing, condemning or complaining. It is important for aspiring leaders to omit such acts because people will not follow a leader who does not listen to what they are saying. The second principle says to â€Å"give honest and sincere appreciation† (Carnegie, 1964). According to Carnegie, flattery is always effective. Of course, everybody wants to feel good. It is so effective in fact that â€Å"Even Queen Victoria was susceptible to flattery† (Carnegie, 1964). However, the negative thing with flattery is that, it is fake and insincere. What Carnegie suggests is for us to give out something positive and honest- which is called appreciation. There is always something positive in everybody, and that is what every effective leader needs to look for. The last principle is to get from other people the â€Å"eager want†. Carnegie mentioned that, we should not talk about what we want, because nobody else will listen to us. Instead, we should talk about something we know others would like to talk about. This will definitely get them interested, especially in doing something for you. Part two of the book discusses the different ways to get people to like you. The first principle tells us to become genuinely interested in other people. Carnegie used his dog as an example or even just dogs generally. They did not study psychology to know how people could like them. They simply liked people genuinely, which is why people liked them back. If you like someone, it becomes almost impossible to resist liking you back. If you genuinely like other people, then you will be welcome anywhere you go (Carnegie, 1964). The next principle is fairly easy and sounds quite simple. However, it is forgotten most of the time, and people forget the magic that it does. One word: Smile. Carnegie mentioned that the smile that people wear on their faces is far more important than what clothes they wear. And the saying â€Å"actions speak louder than words† is very true. Smiles are very important because they say â€Å"I like you, you make me happy. I am glad to see you. † (Carnegie, 1964). This can be proven when babies smile and everybody around them melts. It is the same thing with adults, as long as smiles are genuine. Third principle for people to like you is the simple gesture of remembering the names of the people you meet. It always isn’t a good impression to ask for people’s names the second time around, much more the third. Remembering names are so important in fact that when you â€Å"Remember that name and call it easily, and you have paid a subtle and very effective compliment† (Carnegie, 1964). However, when you forget one name, it will give you a bad impression and will work to your disadvantage. The last three principles of the second part of Carnegie’s work are all connected to each other. First is to â€Å"be a good listener and encourage other to talk about themselves†, next is to talk about the other person’s likes and interests and not talk about you. And the last, is to â€Å"make the other person feel important, sincerely†. These three are very important because if you only care about yourself and talk only about what you feel is interesting, and act like you are the only important person in the world, then no one will want to neither talk nor work with you. In fact, no one will even want to see you. Being egotistic and self centered will not do a person any good in this world. (Carnegie, 1964) Part three of dale Carnegie’s book is How to Win People to Your Way of Thinking. Principle one talks about arguments. The only way to get the best of an argument is to avoid it†, this is what Carnegie (1964) thinks about arguments. This is very true as, while you think you are good in winning arguments, you will never know when you might find someone who is better than you. And people always admire those who walk away from trouble. To sum the third part up, it simply says that you are to respect the way others think, a nd acknowledge their opinions. Even though you do not believe in what they are saying, you must let them speak out, because your opinion is not the only important one. Others should feel like they have a say in things, before they will believe in what you are saying. It is just a matter of reciprocity. â€Å"If we know we are going to be rebuked anyhow, isn’t it far better to beat the other person to it and do it ourselves? † (Carnegie, 1964) It is always good to admit your mistakes. Owning up to your mistakes makes people admire you more, and believe that you are actually human. In the same way that you are never to tell someone that they are wrong just because they do not agree to what you think and they have their own opinions. The first thing that you will need to get from others is respect, and the only way to get that is by showing respect to them first. For the last principles, it just says that in order to get people to believe in the way you think, you must believe in theirs as well. So in conclusion for the third part of the book, it simply means that you have to respect other people’s views, opinions and ideas in order to get them to believe yours as well. Be a Leader: How to Change People Without Giving Offense or Arousing Resentment. This is the last part of Dale Carnegie’s book. Being a leader is never easy. It may look like the easiest part of a job because you get to tell others to do the job for you. However, more responsibilities come with being a leader, such as all the different decisions that should be made. Carnegie mentions that a leader should develop an attitude that praises and appreciates the people that work for him. Another major thing that leaders should develop is before telling others what they have done wrong, tell something that they have done right first because â€Å"It is always easier to listen to unpleasant things after we have heard some praise of our good points. † (Carnegie, 1964). One more important thing for leaders to do is to â€Å"talk about your mistakes before criticizing the other person† (Carnegie, 1964). This is important, as it will not make the others feel so inferior to you as a leader. Leaders should be more humble than the rest because once superiority complex works its way in, the system will stop working. Becoming an example is another one of the most important things that a leader should follow. Encouragements are also one of the best things to do, most especially after some criticisms. I used to believe that I could communicate to others fairly well. I had a lot of friends and people liked to be around me. But after reading Dale Carnegie’s book, I have realized that I was not that effective and that there are still a lot of areas that I need to improve in. First of all, I criticize, condemn and complain a lot. I lack giving out appreciations as well. Most of the time I am self centered and whenever there are conversations I engage in, I mostly talk about topics that I prefer without even considering whether or not the one I’m conversing with is interested with what we are talking about. I also lack the heart of admitting my mistakes quickly. I sometimes tell people that they’re wrong directly, even just for not sharing the same opinion as I do. I even have the tendency to always get into arguments, even when I have the chance to avoid or get out of it. I am not comfortable in talking about my mistakes as I feel embarrassed and want to bury them in the past. One of the things that I know I am strong at is remembering a person’s name. Carnegie has mentioned that this will make people feel very important, which means I have made a lot of people important already, just by this gesture. Although I talk a lot, I make it a point to let others talk as well. I believe I am a good listener, which makes people look for me when they need someone to talk to. I am very free in giving out encouragements, as long as I feel the people are down in whatever they are doing. Even in the littlest improvement a person makes or adjusts, I notice it and give them praise. I give out constructive criticism as well, and is open to taking some for myself from others. So all in all, I have a lot more to work on, even though I have some positive traits that I already carry with me. Reading on will definitely help me improve in different aspects. I have asked my father, brother and mother to give me a peer analysis in my communication skills and my different ways of dealing with other people. They have more or less the same answers and I will only generalize and summarize the answers that they have given. They have mentioned that I criticize and condemn other people a lot may it be directly or even behind their backs. My brother told me that I judge immediately anything I see that does not pass my so called standards. Carnegie believes that this should be avoided in order to find more people to like you, to have more friends. One thing that they appreciate about me is that I give a lot of encouragements to people. They feel that this is when I am most effective when dealing with people. Even my father told me that he appreciates it when he sees me encourage different people. He also mentioned that he has seen how this affects the different people I am dealing with, and can see the changes that such encouragements have brought about. My mother mentioned that I do not easily admit my mistakes. She said that I even reason out to my actions, even if I already know that what I did was wrong. As much as I hate to admit this, it is nothing but the truth. I find it hard for me to say that I was wrong, mostly because of pride. They all agreed to one thing however, and that is I only like to talk about things that I like, and that I do not even ask them what they want to talk about or what they are interested in. This is one of the things Carnegie has mentioned that should not be around when we want to have more friends or when we want people to like us. Again, I can see that there is a lot of room for improvement when it comes to relationships and communication. The first thing that I want to remove from my negative attitude is the inability to admit when I am wrong or I have made a mistake. I think this is the first thing that would turn other people off from wanting to talk or become friends. I believe for me to be able to do this, I must lower down my pride. This will not be easy, and will take a lot of time. But if I want to improve my lifestyle, then this will definitely have to be the first thing off my negative list. The next thing I must make a move on is towards removing the act of always criticizing other people. It has almost become automatic for me to do this, as I easily judge people even at the first look or impression. This has cost me a lot of friends and friendships that might have started. I think the way to start taking this negative act from me is by always thinking positively and giving other people a chance- a chance to show their true selves. Being judgmental has always been a problem and will be a bigger problem if I do not act up on it immediately. Being less self centered and egotistic will be very important if I want to start new and stronger relationships with other people. These are only some of the things that I think I need to change. Dale Carnegie has helped me realize a lot of things. His work has definitely taught me a lot of things; things that are essential in day to day living. After all, no one can live alone. Friends and relationships with people will help us live more harmoniously and Dale Carnegie’s â€Å"How to Win Friends and Influence People† has taught me how I can have more friends and develop friends a lot easier.

Bird Flu Research Paper Example | Topics and Well Written Essays - 750 words

Bird Flu - Research Paper Example Only a few strains of three subtypes of the virus are highly pathogenic in human beings. These are H5N1, H7N3, and H7N7 (Leong et al, 2008). Of these, the H5N1, poses a threat to human beings and because of its deadliness, it is referred to as the most highly pathogenic avian influenza. This strain is remarkable for its ability to cause severe sickness and death among birds, especially domesticated birds ones like chickens, turkeys or ducks. History of the Bird Flu In 1918, the Spanish flu begun when a normal type of human influenza virus changed suddenly and became lethal. Scientists believe this virus was a mutated form of the avian influenza/bird flu virus. The first H5N1 outbreak occurred in 1987 but the first human incidence of illness from this deadly strain of avian influenza was reported in 1997 in Hong Kong. Eighteen people were infected and 6 of them died. Since then, over 560 cases have been identified globally with deaths exceeding 300 (WHO, 2011). These infections have b een severe and at worst, fatal. The years 2003, 2004 and 2005 are considered major H5N1 resurfacing and infection years (WHO, 2011). Method of Transmission Human infection of bird flu occurs primarily as a result of contact with the secretions or feces of sick poultry or, handling dead birds that had been infected by the virus. Because of this, people at high risk of infection include poultry farmers, other people working with poultry, and those who eat undercooked meat, eggs or/and blood from infected birds. Few cases of human-to-human transmission have also been reported but such transmissions require close and lasting contact with an infected person (Nettleman and Davis, 2011). Symptoms According to Pubmedhealth (2011), symptoms of bird flu infection among human beings depend on the strain of virus contracted. Typical symptoms for H5N1 virus include diarrhea, coughing, runny nose, difficulty in breathing, fever with temperatures of more than 38oC/100.4F, headache, muscle aches, s ore throat, eye infections and vomiting. These symptoms can progress to pneumonia and even result to respiratory failure. The virus causes acute respiratory distress syndrome (ARDS), a dangerous and often fatal form of pneumonia. Where it Occurs Mostly in the World Since the identification of the highly pathogenic avian influenza, birds infected by the strain have been found in Europe, Africa, Asia and the Middle East. Specific regions were the influenza virus have been found are Alberta, England, Germany Ukraine, South Africa, Malawi, Ethiopia, Australia, Ontario, Hong Kong, Wisconsin, Rostock, Maryland and Guryev ( Kawaoka, 1998). Countries that have reported human death as a result of the virus are Azerbaijan, Egypt, Indonesia, Cambodia, China, Iraq, Laos, Thailand, Turkey, Nigeria, Pakistan and Vietnam. Despite control measures, the virus continues to exist in some areas of Asia and Africa (WHO, 2011). Life History of the Microbe and Chances of Survival The symptoms of bird flu often show 2-8 days after infection. When the H5N1 virus enters to the human body, they multiply in the lower respiratory tract and as a result, they cause pneumonia. This in turn results to respiratory problems of various severities. This virus is hard to spread but lethal. This is unlike the H1N1 virus which replicates in the upper respiratory tract, making it easy to spread but less lethal. Bird flu infection triggers the body to produce antibodies against it during and

RP 3.2 Online Ethical Business project Essay Example | Topics and Well Written Essays - 1000 words

RP 3.2 Online Ethical Business project - Essay Example The particular phone is then shipped to the buyer within 1-5 days depending on their location. The business will be aimed at providing services to customers while not infringing on the customer privacy and the Digital Copyright Act (SBA, 2013). The business will therefor comply with all the legal considerations and requirement for an online business. Some of these requirement include the fact that, the business will be duly registered as an online business by the national and the local authorities for the issues of tax remittance. To our customers, we will comply with the customer privacy regulations of not sharing their vital and personal information with any other entity and we will ensure that the customers’ personal information remains personal and private. Just like in every business, we will be faced with a stiff competition in the market. We’re aware of the already existing well established companies that deal do online cell phone retailing. Some of the major players in this market include Amazon, Mobile city online, OLX and others. However, that will not encourage us from operating and having our own market niche and create our customer base. We will involve in thorough advertisement through social media, television and magazines in order to increase our popularity. We will ensure that we collaborate with phone manufacturers so that we be among the first people to sell the newly released phone models. This way, we will be able to attract more clients who are in the category of those who would want to be the first to use such new models (James, 2012). We will then win our customers through this strategy and ensure we sell online high quality phones in order to stay on top of competition. For the start, the business will only be able to serve the clients in the United Kingdom. Here, it will be able to at least meet the cost of delivering the purchased phones to the

THE APLOGY BY PLATO Essay Example | Topics and Well Written Essays - 750 words

THE APLOGY BY PLATO - Essay Example â€Å"I am that gadfly which God has attached to the state, and all day long and in all places am always fastening upon you, arousing and persuading and reproaching you† (Plato, 399 BCE) The continued vein of thought associates the idea of an easy death with the possibility of additional irritants. Clearly Socrates believes that while his existence is an irritant to the state it is an irritant that should be accepted as the alternatives are simply more of the same. The idea of freedom of speech can be equated to Socrates brilliance of approach. Though what is said by some may not be appreciated by all it is necessary to have the alternatives available. Unfortunately, in many cases the state will simply terminate the threat regardless of the potential and often assured possibility of another gadfly becoming a persistent irritant in speaking against the state. Of the passage another portion immediately becomes glaringly apparent. His use of God as a defense is admirable and show s a persistent desire to enlighten even the most hard headed of the state’s prosecution against him. If one believes in a God or Supreme Being then it stands to reason that his appearing as an irritant that can potentially cause many problems is given by God. â€Å"For if you kill me you will not easily find a successor to me, who, if I may use such a ludicrous figure of speech, am a sort of gadfly, given to the state by God† (Plato, 399 BCE) In addition to his appeal to a higher power is his appeal to singular ability with the line, â€Å"You will not easily find another like me, and therefore I would advise you to spare me† (Plato, 399 BCE). And he is right, for every human is irreplaceable as every human is singularly unique. Unfortunately, this argument goes against the other arguments regarding the likelihood of additional gadflies appearing and continuing the harassment of the state. For if he is truly unique then one can rightly assume that it is likely h e will not be replaced. More importantly is the thinly veiled message to the state, while it may feel good ridding itself of a stinging, biting nuisance for a while this is no long term solution to any problem. Easily equated to this are the modern movements speaking against state excess and immorality of conflicts and more; while the message is not easily accepted or acted upon by the state, it may become necessary to stop the problem of the gadfly by cleaning up the horse. Again using a modern approach, to stop the protests, articles and various messages against the state it would seem that the easiest course for long term comfort would be the reduction of immoral wars and greed. Plato uses the literal idea of death faced by Socrates both during and after his trial in order to develop the more philosophical concept of philosophy as a pursuit of death. For Plato, the melete thanatou involves the lack of a true fear of physical death but more a fear that the knowledge obtained and p assed on by himself will be lost. â€Å"I were to desert my post through fear of death, or any other fear; that would indeed be strange, and I might justly be arraigned in court for denying the existence of the gods, if I disobeyed the oracle because I was afraid of death, fancying that I was wise when I was not wise† (Plato, 399 BCE). He did not care so much for the minutia of theological argumentation but more the

The role of the neuromuscular system on work and exercise Essay

The role of the neuromuscular system on work and exercise - Essay Example A nerve impulse from the brain travels through the nerve and cause the release of acetylcholine at the nerve junction. This chemical is picked by chemical receptors in the muscle that effect the movement. Hypertensive individuals are treated with calcium blockers and catecholamine blockers. These drugs protect the hart from heart attacks by neither blocking the action of nor adrenaline which initiates the flight or fight response. They block the reception of stress hormones such as epinephrine weakening their effects. This reduces hypertension. Nevertheless, this also has some adverse effect on the individual because it blocks the absorption of calcium to the ones. As a result, the individual taking the treatment has a high risk of developing ostereoporosis. The motor skills of the patients are also adversely affected because of reduced calcium in the bones. As a result, this type of medicine is not good for physically active individuals or athletes as it affects their performance. This is because they block the uptake of oxygen and make exercise to be more strenuous. Some patients may even stop taking the drugs. Calcium channel blockers also have adverse effects on skeletal movements. They inhibit the movement of calcium inwards by slowed channels into the heart, blood vessels allowing the heart to pump blood more easily and increasing the width of the blood vessels. As such, the heart doe not strain in pumping blood lowering the blood pressure. Increase in intercellular concentration of calcium results in eccentric contraction that causes damage in the skeletal muscles by damaging the muscle protein structure (Blottner & Salanova 2010). The damage arises from increased resting calcium, profound loss of involuntary ad voluntary muscles and increase in intracellular calcium concentration. Caffeine is a mild stimulant. It effects as a stimulant and affects brain activity. Caffeine is quickly absorbed by the body the moment