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By Q. Jarock. Guilford College.

Your doctor will want to know if you or anyone in your family has had any of these conditions: lung infection purchase 250mg diamox amex, cardiovascular disease order 250 mg diamox amex, lung disease, tuberculosis, asthma, AIDS, heartburn, heart valve dis- ease, bronchitis or bronchiectasis, pulmonary embolism, lung tumor. Your doctor will want to know if you smoke cigarettes or have been exposed to tuberculosis or industrial dusts such as asbestos. Your doctor will do a physical examination including the fol- lowing: temperature, weight, breathing rate, checking sinuses for 54 Copyright © 2004 by The McGraw-Hill Companies, Inc. COUGH 55 tenderness, checking the throat for redness, listening to the chest and heart with a stethoscope, checking limbs for swelling or tenderness. CAUSE WHAT IS IT YPICAL SYMPTOMS Upper Common cold and other Runny nose, sore throat, respiratory infections of the nose facial pain, general malaise infection and upper respiratory airways Bacterial Pneumonia or other Begin over a few hours or infections infections of the airways days, usually accompanied and lungs by coughing up green or yellow fluid, fever or chills, sometimes coughing up blood, chest pain, fever Bronchitis or Infection or inflammation Chronic cough, trouble bronchiectasis in the air passages breathing, coughing up leading to the lungs sputum, symptoms worsen- (bronchitis), or destruc- ing in morning tion and opening of the airways caused by another disorder (bronchiectasis) Asthma Recurrent attacks of Dry cough, sometimes wheezing, coughing, and trouble breathing and shortness of breath wheezing, often aggravated brought on by certain by exercise, cold air, a triggers recent cold, taking beta- blockers Croup (child) Infection of the voice Barking cough, wheezing, box fever, hoarseness, typically appears after a cold, more common in children between 6 months and 3 years old Whooping Bacterial infection that Fever, wheezing, staccato cough (child) produces coughing cough, nausea, vomiting, spasms that produce a most severe in infants “whoop” sound 56 COUGH WHAT CAN CAUSE COUGHING, AND WHAT IS TYPICAL FOR EACH CAUSE? Your doctor will want to know if you have any of these condi- tions: diabetes, bleeding disorders, heart disease, immune system disorders, organ transplant. Your doctor will want to know if there is a history of domestic abuse in your home. Your doctor will want to know if you are taking any medications such as steroids or blood thinners. Your doctor will do a physical examination including the fol- lowing: temperature, blood pressure, pulse, examine the injury for: size, crushed skin and bone, dirt or other foreign matter, sensation and movement of body parts near the injury. Your doctor will probably not order any blood tests unless the injury is very deep or severe or there are other associated problems. You may need to have a tetanus shot (booster) or other shots (such as rabies) if your doctor suspects an infection, or to take antibiotics. Depression, Suicidal Thoughts, or Anxiety What it feels like: feeling sad or nervous for no apparent reason, some- times manifested as changes in appetite or weight, “panic attacks,” trouble sleeping, forgetfulness, or thoughts of committing suicide.

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However cheap diamox 250mg fast delivery, this ignores the fact that certain words carry more information content than others buy diamox 250mg without a prescription. The so-calledtf-idfweighting scheme (Salton & Buckley, 1988) has been found a suitable means to deal with this problem: Here theterm frequencies (tf)in the document vector are weighted with the inverse document frequency idfi = log(N/sd ), where N is the i number of documents in the collection, and sd denotes the number of times the word i stem si occurs in document d. Although the “bag of words” model completely discards the order of the words in a document, it performs surprisingly well to capture its content. A major drawback is the very high dimensionality of the feature vectors from which some computational algo- rithms suffer. Additionally, the distance measure typically does not take polysemy (one word has several meanings) and synonymy (several words have the same meaning) into account. Copying or distributing in print or electronic forms without written permission of Idea Group Inc. Interactive Information Retrieval Towards Effective Knowledge Management 59 Evaluating Retrieval Performance In order to evaluate an IR system, we need some sort of quality measure for its retrieval performance. Consider the following situation: We have a collection of C documents and a queryQ requesting some information from that set. Let R be the set of relevant documents in the database to that query, and A be the set of documents delivered by the IR system as answers to the given query Q. The precision and recall are then defined by R A R A precision and recall, R R where R∩A is the intersection of the relevant and the answer set, that is, the set of found relevant documents. The ultimate goal is to achieve a precision and recall value of one, that is, to find only the relevant documents, and all of them. A user will generally not inspect the whole answer set A returned by an IR system—who would want to click through all of the thousands of hits typically returned by a web search? Therefore, a much better performance description is given by the so-called precision-recall-curve. Here, the documents in A are sorted according to some ranking criterion and the precision is plotted against the recall values obtained when truncating the sorted answer set after a given rank—which is varied between one and the full size of A. Therefore, the quality of a search engine which generates hit lists is strongly dependent on its ranking algorithm.

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