Simple Guide to Writing a Scientific Paper

How to Write a Scientific Paper Sometimes assignments of such a kind are unexpected but, anyway, you have to write them from time to time in college. If you have no idea how to write a scientific paper well, we suggest not worrying because this task is rather a little difficult than impossible to complete. Just follow the style guide and use good content — this will help you improve your writing skills and become a better scientific writer.First of all, think of your audience because it determines the best methods and style of writing. Consider the scientific background of your readers. Think how you can make your paper easier to read. Another important feature of scientific papers is the field you are writing about. If the topic of your work crosses different disciplines, you may need to provide your audience with more information so that they can get a grasp on the fundamentals of all considered fields.The Format of a Scientific PaperFirst of all, we suggest using active voice. Some journals require their authors to use active voice only, but this rule doesn’t apply to all the scientific journals. Thus, you have to clarify it before you start writing. Scientific papers often imply the use of specific terms, so you have to introduce all the terms at the very beginning. In addition, don’t use any slang words.Another important thing is the style of your paper. Many journals have their own style guides and other materials for authors. Get acquainted with the required style, necessary formatting, and other details, such as word count or font size.Once you’ve found all necessary information regarding the style, start organizing your paper in a proper order. Begin your paper with an abstract and then get to an introduction. The abstract provides a brief summary of the paper. A central part focuses on methods, materials used, and results. Below, we are going to consider the structure of a scientific paper in more detail.SectionsWe suggest starting with the Materials and Methods because this section won’t take a lot of time and effort. Describe used methods and make sure that your readers will easily understand all information from this section. The point is that data from this section must help anyone replicate your experiments. When describing materials, include necessary references to the manufacturer and specify catalog numbers.If your study requires certain ethical approvals, you have to address this issue after you describe the used methods.Create a specific section for the results of your study. Remember that you have to take a neutral position regarding results: don’t discuss any obtained data, just describe it and include charts or tables if necessary. You will have a particular section to express your opinion and draw conclusions.The Discussion section is a place where you have to interpret your results, considering them in the context of already existing materials on your subject. Here you can draw some conclusions and tell what experiments may become possible in the future. This part of the paper is aimed to persuade your readers that your study is important and useful. However, don’t make rhetoric your main goal. Avoid repeating yourself, and support all your claims by evidence.Once you’ve finished writing these sections, get to a literature review. The literature review is a part of the introduction. It is also focused on the importance of your work and gaps that it fills. End your introduction with a hypothesis and objectives. Don’t forget that the introduction must be short and comprehensive.Analyze your paper and write a brief summary. This is the Abstract. We suggest writing it when the entire paper is completed. The length of this section may vary depending on the requirements of a particular journal. However, usually, this section doesn’t exceed 250 words. The summary must provide your readers with a general idea of your study and acquaint them with the most import ant findings. Write a brief conclusion about findings. The most important thing about the abstract is that it must encourage your readers to read more.Final TouchesCreate a title for your scientific paper. Make sure that it’s specific and directly related to your study. Don’t make your title too long and avoid abbreviations or acronyms.You can add some tables or figures. Tables are usually used for raw data, while figures can be really useful for comparisons. However, if you can deliver your information in a couple sentences, there’s no need for any illustrations. Make sure that all images meet necessary requirements regarding their format.In the end, read the entire paper and fix all mistakes. Make sure that you have used the proper citation format and that your quotes reflect your statements correctly. Double-check your paper and ask for help if you need.

Scrooge to Belle Essays

Scrooge to Belle Essays Scrooge to Belle Paper Scrooge to Belle Paper Dickens uses quite a lot of dialogue in A Christmas Carol, the quality which I noticed that it contributes to the story, is that it makes you believe as if you are there watching them interacting with each other. Also you get to see how the characters speak and act while they are in the presence of other characters in the story, so you get to know the character better and who they regard highly and respect and those who they dont regard so high. Dickens uses dialogue to create atmosphere especially when the spirit of Marley confronts Scrooge and they begin to talk to each other, this changes the whole mood at that moment, it makes the reader impatient to see what they will say to each other and what they will do especially in the later stages of the dialogue where the spirit of Marley confronts Scrooge, You must have been very slow about it, Jacob, Scrooge observed, in a business-like manner, though with humility and deference. Slow! the Ghost repeated. Seven years dead, mused Scrooge. And travelling all the time? The whole time, said the Ghost. No rest, no peace. Incessant torture of remorse. This dialogue shows how Dickens uses dialogue to create atmosphere but it also tells something about Scrooge, Scrooge seems to be observing Marley even though they had been great friends for a long time this tells us that either that he doesnt trust Marley or that he doesnt believe the thing that he is speaking is real, this is where the atmosphere is coming from. Dickens uses short and long sentences to create tension in his writing. Here is a short sentence, The chain he drew was clasped around his middle. This sentence describes the ghost of Marley but very directly so not to lose the tension or suspense, another good short sentence is, He looked out. This tells he looked out by it is expressed very sharply making you jump because of the quick action therefore maintaining the tension and suspense. Here is a long sentence, To sit, staring at those fixed glazed eyes, in silence for a moment, would play, Scrooge felt, the very deuce with him. This long sentence constructs the suspense and atmosphere of what is going to happen next, keeping the reader on the edge of their seat and also variety in length creates interest. But even though it is a long sentence it has a lot of pauses which is produced by the repeated use of commas therefore maintaining the tension in the sentence. A way which you could look at it is the merging of many short sentences like He looked out. Therefore creating one long sentence. Dickens introduces humour into A Christmas Carol for example, a ghost so transparent might find him self to take a chair some people may say it is wrong to introduce humour into a story but I dont think Dickens meant for it to be a full on ghost story because introducing humour into the story, it lightens up the mood thus varying the atmosphere. Also you have to look at the audience which Dickens was aiming for, I dont think he wrote the story for die hard ghost story readers but for children, Christmas story but most importantly to put the point across of the appalling plight of the children of the poor. In A Christmas Carol there is many characters some major and others minor from Scrooge to Belle. The first major character is obviously Ebenezer Scrooge who is a hard, cold miser who spends his days counting his profits and wishing the world would leave him alone. He doesnt believe in charity, and he is certain that those who do are just lazy bums looking for a handout. Scrooges entire life is his business and he shuts out his nephew who is the only relative he has. But Scrooge is visited by his old business partner, Jacob Marley, who warns him that if he continues to live his life in such an unchristian way, he will spend all eternity trying to make up for it. Three spirits also visit him who shows him that the errors of his ways turn everyone against him and therefore losing the respect of others making him a lonely old man. Because of what he sees and learns, Scrooge opens his heart to the people around him and learns charity and love and saves himself from the doom of which Marley warned him. Bob Cratchit another main character is an accountant who works for Scrooge, and he is a kind and loving family man. Scrooge generally mistreats Cratchit, but the accountant bears his employer no ill will because he believes that Scrooges life is lonely. The greatest sorrow in Cratchits life is that his young son, Tiny Tim, is very ill. Because Bobs salary is so meager, the family cannot afford treatment for Tim. When Scrooge sees their situation during one of the ghostly visitations, he realizes that he must be more generous to his employee and help save Tiny Tim. Jacob Marley was once Scrooges business partner, but he died seven years ago and now he returns as a ghost to warn Scrooge of the horrors that await him unless he changes his ways. Marley appears to Scrooge on Christmas Eve to tell him of the cumbersome burden that he bears in death because he neglected his duty toward others in life. Marley must walk around and watch people and regret that he did not help anyone or touch anyone during his lifetime. His burden is incessant remorse for his own greed during life. He warns Scrooge that unless he becomes a more charitable person, he will also bear that weight. Marley tells Scrooge of the three ghosts who will visit him. They are Scrooges only chance for salvation. After the warning, Marley flies out the window and joins the other ghosts who drag their chains of duty.

Complexity and Contradiction in Architecture Essay

Complexity and Contradiction in Architecture - Essay Example Accordingly, we will have to see everything logical as a violation of these rules. This chapter is, an interesting parallel, with Robert Venturi - who, it turns out, also was speaking in "Complexity and Contradiction in Architecture" about rules of the absurd exactly - and about the need to respect them. Venturi contemplates the "complex" and "contradictory" ways architecture relates to people, cultural contexts, and its own history. The "Both-And" is the mainstream of architecture away from modernism. In this chapter, "Contradictory Levels: The Phenomenon of "Both-And" in Architecture", he called for an architectural tension arising from perceptual ambiguity - an ambiguity engendered by what he termed a "both/and" style. The both/and concept requires an excess of both form and meaning in order to create a complex, contradictory architecture: "It can include elements that are both good and awkward, big and little, closed and open, continuous and articulated, round and square, structu ral and spatial." In this chapter, he prefers "both-and" to "either-or," black and white, and sometimes gray, to black or white. A valid architecture evokes many levels of meaning and combinations of focus: its space and its elements become readable and workable in several ways at once.

INDIVIDUAL STRESS AUDIT Essay Example | Topics and Well Written Essays - 1250 words

INDIVIDUAL STRESS AUDIT - Essay Example has been compiled, those which I feel are potentially stressful in my life at present. I have also described the situation, which I actually currently experience as stressful. I have also described the stressful situation, which I handle well and which is not stressful any more now. I have also described the signs and symptoms of the stress I personally experience currently and the ways in which I presently attempt to manage my stress and the successful situations.   Accroding to LeFevre, Matheny and Kolt (2003), adverse situations or adverse influences make people respond differently and the response of the people can be described as a set of psychological and physical behaviour, which is called â€Å"stress†. They further added that the adverse situation or the adverse influence is an external force is called ‘stressor’ which acts on a person. De Charms (1968) defined stress as the psychological and physical changes in an individual due to external forces. Lis t of My Stressful Situations I wonder if there is any person who does not have any stressful situation in his/ her life. ... The selection committee of my university didn’t select me for the football team this year for my poor performance in the selection match 3. My father divorced my mother for another woman 4. My sister is dating with a boy whom I hate the most Situations 1. My roommate is a careless and fussy boy and he always keeps the room dirty and untidy 2. My friends and my girlfriend are angry with me as I am not able to give them adequate time since I am terribly occupied with my studies 3. My mother is broken after my father left and she is all alone at home. I need to meet her but I don’t have time Responsibilities 1. I have to score good grades in my finals so that I get a good job at the soonest 2. I have to earn my for myself and my mother and sister as there is no earning member in my family after my father 3. I have to buy a gift for my girlfriend as her birthday is close Pressures 1. I have the dual responsibility of scoring good grades and earning for my studies and liveli hood 2. I have to finish the project within two days which I have not started yet and I have a scarcity of time. 3. I need a good job as soon as possible but I need to pursue some professional courses for which I neither have time nor money Others 1. I am a very average looking person with a lean physique and with no charms in my personality and I hardly influence others 2. I am very shy and introvert Signs and Symptoms of Stress Above mentioned events, situations, responsibilities, pressures, etc. are quite stressful for me and they have affected me tremendously and I noticed many physical and psychological signs and symptoms when I am under stress. Most of the time I suffer from headaches and constipation and my mouth dries when I think about my stresses.

An evaluation of the agricultural green revolution Essay

An evaluation of the agricultural green revolution - Essay Example Green revolution has been a blessing until recent years when the negative impact of these technologies has emerged. This paper discusses the concept of green revolution, its benefits and risks of this technology. Food security has been an issue of concern in many of the developing countries. In fact it can be said that the problems related to food security have been a major cause of concern to mankind. In the past the food needs of growing populations were met especially by expanding the cultivated area. There were farming communities that cultivated in a particular place for few years and then later abandon the land for several years. However, as the most fertile land became scarce, researchers and agriculturists found that expansion of agricultural land for increasing production was not a good option for the future years. Further expansion meant bringing poorer and lower yielding land into cultivation. Hence it was found in 1960s that the present levels of production cannot sustain the population and maintaining food production per capita was a challenging task (Evenson, N.D). The Green Revolution came as a boon to mankind and was a major turning point in agriculture. It helped to increase the food production predominantly by getting better strains of wheat, rice, maize and other cereals in the 1960s. The revolution as such began in 1945 when the Rockefeller Foundation and the Mexican government established the Cooperative Wheat Research and Production Program to improve the agricultural output. Dr Norman Borlaug is the father of green revolution and was awarded the Nobel Peace Prize in 1970 for developing this technology (Parks, N.D.). Green revolution is the breeding of new plant varieties and the application of modern agricultural techniques such as use of chemical fertilizers, irrigation, use of heavy machinery and control of pests and diseases using synthetic pesticides. Probably without the use of Green Revolution technologies the basic food requirements of the world's current population would not have been possible. This technology is responsible for saving almost a billion human lives from starvation (Easterbrook, 1997). Green revolution technologies along with its gains also brought about several economic and ecological problems. Food security being one of the most important issues concerning mankind, the further increase in food production should be addressed with caution in the coming years. Benefits of Green Revolution The adoption of HYVs occurred quickly because farmers and researchers found a good yield from these varieties when compared to the traditional varieties. By 1970, about 20 percent of the wheat area and 30 percent of the rice area in developing countries were planted with the HYVs, and by 1990, the share had increased to about 70 percent for both crops which produced good yield. In fact it can be said that the basic yields of rice and wheat almost doubled. For instance, Mexico a country that adopted green revolution went from having to import half its wheat to self-sufficiency by 1956 and, by 1964, to exporting half a million tons of

The Use Of Mechanical Ventilators Engineering Essay

The Use Of Mechanical Ventilators Engineering Essay The respiratory system, composed of different structures, is involved in ventilation and gas exchange. Its main function is to provide a surface for gaseous exchange of oxygen and carbon dioxide [1]. Gas exchange is performed at the alveoli, specialised cells which are part of the lung parenchyma. It provides oxygen to the blood and removes the carbon dioxide produced in the body as a product of cellular metabolism; for the oxygen to reach the lungs there must be a series of tubular structures that communicate with the outside. The diagram below shows a block diagram of the anatomic structure for the respiratory system (Fig. 1). Figure Block diagram of the Respiratory System anatomic structure Air diffusion into these channels is conducted by the respiratory muscles (intercostals and diaphragm) which increase and decrease rhythmically the size of the thoracic cavity (inspiration and expiration). The pleural cavity contributes on this phenomenon when its negative pressure opposes the elastic recoil of the lung; this action gives place to a conductive portion of the system, whose function is to allow air penetration. In addition the respiratory portion composed bronchioles, alveolar ducts, alveolar sacs and alveoli; establishes homeostasis. Figure Muscles and Pressures involved during breathing The ventilation of the lungs can be measured by studying a gas volume and its variations in the lungs [2]. Boyles, Charles, Daltons and Henrys law of gasses are critical in the understanding of gas exchange, measurement of gas movement take an important part in mechanical ventilation. During breathing movements are cyclic, and volume in the thoracic cavity is changed by the muscles mention before. During inspiration the pressure within the thoracic cavity and lungs is decreased and the same time the volume is increased, allowing air flow in. On the other hand during expiration the elastic lungs and the thoracic wall recoils producing an increase of pressure but a decrease in volume; allow letting air flow out (Fig. 1). Figure Respiratory performance and volume relationships Figure 3 At the same time, inhalation and exhalation allow the mobilization of the volume of gas which can vary depending on the type of respiratory movement and lung elastic forces. Lung capacities are defined by the sum of different volumes. Figure 2 shows a graphic representation of the respiratory performance volume relationships. FCR (Functional Residual Capacity) represents the remaining air after a cycle. VT (Tidal Volume) is the flux of air in a normal inspiration and expiration. IRV (Inspiratory Reserve Volume) is the amount of air moved during a maximum and forced inspiration and results over the Tidal Volume. Similar to IVR, ERV (Expiratory Reserve Volume) is the amount of air mobilised during a maximum and force expiration resulting below the Tidal Volume. The vital capacity is the sum of IRV, VT, and ERV. VR (Residual Volume) as its name says, is the amount of air remained in lungs after a maximum exhalation. The IC (Inspiratory Capacity) is the flux of air after a quiet cycle. A nd finally the TLC (Total Lung Capacity) corresponds to the total volume of gas remaining in the lung after a maximal and forced inspiration. Volumes and lung capacities may be altered in different diseases; its measurement is a critical element for diagnosis, performed by pulmonary function tests. The respiratory parameters: compliance, lung elasticity, intrathoracic pressure, airway resistance, intra-alveolar pressure; help measure the strength in muscles when breathing. Airway resistance is determined by the Poiseuille Law (eq. 1): {1} Where ÃŽÂ · represents the viscosity of the fluid, l is the longitude in the airways, and r is the radio on the airways. Resistance has a great significance in pulmonary physiology; and it is analysed by the ratio of the pressure differential flow. The airway resistance can be increased significantly in the presence of disease such as Bronchitis, Asthma, and Emphysema among others. In addition a great amount of patients admitted to intensive care have need of some form of respiratory support; due primarily to hypoxaemia or ventilatory failure. Respiratory support ranges from oxygen therapy by face mask, through non-invasive techniques such as continuous positive airways pressure, to full ventilatory support with endotracheal intubation[3]. Figure Block Diagram of a basic mechanical ventilator A mechanical ventilator is an automatic machine, designed to provide all or part of the work the body must produce to move air (gas) from the inside to the outside and vice versa. Furthermore mechanical ventilators are designed to transmit energy applied in a predetermined manner to perform a specific task. Interface between machine and patient stable, energy source, control system (for timing and size of the breaths regulations) and monitoring (device performance and patients condition) are the general requirements for ventilators (Fig. 4). A further analysis as well as comparison of this equipment will be made along the paper, with the purpose of a better understanding of its designed and future developments. Current State of the Art Since the invention of artificial respiratory supply, mechanical ventilators have evolved in the past 40 years. There are five generations of mechanical ventilators where changes have been made in order to present a better apparatus. The first generation consisted of only one mode of ventilation, and the electronics used was primitive compared to the one used nowadays. The equipment was no safe since the control with the user was not precise and it did not count with any alarm system. The second generation provided basic alarms, containing electronic circuitry as well as an analogue control of fluid. A major evolution took place on the third generation; digital electronics, microprocessors, were employed for most of the functions. The fourth generation included modern displays such as CRT or LCD ensuring a better patient care. The generation currently used is the fifth generation which features a better onscreen display control. It is also made by advanced logarithms that permit graphic display, calculation of lungs mechanical properties, and system diagnostics. Principles of Operation Mechanical ventilation is all different types of procedures that provide artificial respiration employing machinery to meet the respiratory function of a person who cannot perform it by itself [4]. In addition Mechanical Ventilation (MV) is the product of interaction between a ventilator and a patient, and through this equipment parameters of volume, flow, pressure and time are controlled. Considered as a generator of positive pressure that supplies active phase of the respiratory cycle; there are basically four types of MV: controlled by pressure, time, volume and flow. Mechanical ventilation systems create an intermittent positive pressure where air or a gas mixture enriched in oxygen is insufflated in the patients airway. Pressure in the airway at the end of passive expiration and that at the same time goes beyond atmospheric pressure is known as positive end-expiratory pressure (PEEP) [5]. PEEP is extremely important in effects and mechanisms of the respiratory system. It plays major roles in gas exchange, lung mechanics, and hemodynamic effects. Some effects in lung mechanics it prevents the lung from collapsing, increases FRC among others.[5] In order to provide respiratory support, a MV such as the one in figure is used. Figure Flow and control of gas exchange during artificial ventilation Input of this system provides O2 as a medicinal gas; and in the case of portable ventilators the medicinal gas can be supplied by a dry air compressor. Ventilatory gas is passed through a pressure regulator; which is in charge of preserving the preset pressure for the inspiratory gas and ensures the integrity of the airway. The gas flown to the patient is allocated by an electro-valve (Fig. 5); this remains energised until the end of the inspiratory time previously programmed, when de-energised the gas flow is ceased. Finally the expiratory electro-valve is activated causing the air exhaled by the patient to be expelled to the environment by a biological filter that prevents the contamination of this. Models of Ventilator-Patient Interaction Figure Model representing breathing, were a rigid flow conducting tube is connected to an elastic compartment The Respiratory System can be modelled to illustrate the relations amongst the variables of interest; providing a better understanding of patient-equipment interaction. The model most frequently used is shown in figure where a rigid flow conducting tube is connected to an elastic compartment [6]. When airway pressure goes higher than the base line, the inspiration is assisted (Fig. 6)The Transrespiratory pressure (eq.2) leads inspiration, and is the pressure at the airway opening, ,minus the pressure at the body surface: {2} At the same time has two components, transairway pressure (eq. 3) and transthoracic pressure (eq. 4): {3} {4} A mathematical model that represents volume, pressure and flow during ventilation is known as the equation of motion for the respiratory system [6] (eq. 5) : {5} Where is the pressure generated by the ventilator, is the pressure generated by the ventilator muscles, is the respiratory system elastance, is the respiratory system resistance, and is lung volume where the derivate of volume with respect of time is the flow in the system. Table (1) compares typical values against values during mechanical ventilation [6]. Table Pressures and Volumes during Mechanical ventilation Typical Values Mechanical Ventilation The model provides the basis for monitoring the patients current condition, and it is done in terms of R and E which are mechanical properties. Figure Electrical model representing breathing composed of a RC circuit Another model used for representation is the electrical model (Fig. 7); this model is analogous to an electrical circuit consisting of a resistor and a capacitor (RC circuit), a power supply, which in this case represents the pressure generated by a mechanical ventilator. The electric current stands for the flow of air in the system. In this model, pressure, volume and flow are variables (functions of time) while the resistance and compliance are constant [4]. Second Law of Kirchooff can be used to analyse the electrical model and the following equation(eq. 6) can be derived: {6} Current and charge can be related by , the electrical parameters of the circuit can be now represented by the ventilator variables. When applying a pressure to the input of the system (output pressure of the ventilator), the volume varies according to the following differential equation (eq. 7) the total pressure applied is equal to the sum of the differences in pressure due to the compliance of the system and to the resistance of the airway: {7} According to this system is the output pressure of the ventilator, the inspiratory volume, and is the compliance of the lung [4]. Operating Modes Mechanical ventilators count with different operating modes, which are the manner the ventilator ensures that the patient is provided by the appropriate minute ventilation; satisfying the respiratory needs without damaging any pulmonary tissue. Operating modes can be identified by: breathing pattern, Control type, Control Strategy [6]. When specifying just the breath control variable (Primary Breath Control), there are three approaches: pressure control, volume control and dual control modes. Pressure control (PC) is used when patients can initiate respiration; pressure in the airway is increased during inspiration. Volume control (VC) employs a control system to guarantee that a set tidal volume is distributed during the inspiratory cycle. The Dual Control (DC) is simply a combination of both, used in order to provide minute ventilation while maximizing patient synchrony[6]. Breath sequence is the other component of breathing pattern operating mode. There are two ways airflow can be delivered using this mode, mandatory or spontaneous. The difference between the two of these is that on mandatory breath the ventilator initiates and establishes the tidal volume, Vt. Contrary to mandatory breath on spontaneous breath the patient establishes and starts its own breathing. From these, three different modes of breath sequence can be delivered: Continuous Mandatory Ventilation (CMV), Continuous Spontaneous Ventilation (CSV), and Intermittent Mandatory Ventilation (IMV). CVM and CSV, all breaths are mandatory or spontaneous respectively; however in IMV breaths can be either mandatory or spontaneous [6]. Controls In order to select breathing mode and ventilation pattern parameters, controls are used. There are two different ways on which breathing can be controlled, and at the same time there are control strategies which depend on the variables and parameters set to obtain this. A system can be controlled by an open loop or closed loop (Fig. 8). Like any open loop system, there is no feedback, and the system could be affected by mechanical changes in the lungs, patients ventilatory efforts and leaks [6]. Figure Control systems used for mechanical ventilation Closed loop sense breathing variables such as pressure, volume, and flow to provide a feedback signal which is compared to the desired value set at the input. There are different types of closed loop systems depending on the number of variables used. The instruments used to measure volume-flow rate are referred to as volume flowmeters; they may be classified as rotameters, penumotachographs, hot-wire anemometers, time-of-flight flowmeters, ultrasonic flowmeters, and vortex flowmeters [2]. Depending on their principle of operation, flowmeters can be classified in four main categories: rotating-vane, ultrasonic, thermal-convection, and differential pressure flowmeters. Rotating-vane Flowmeters These types of sensors contain a small motor or turbine which rotates with airflow, and then flow rate is related to the revolution of the rotor. This type of flowmeter is commonly used in ventilator machines and respiratory monitoring [2]. The spins are detected optically and converted into voltage to be recorded or displayed. Ultrasonic Flowmeters Ultrasonic flowmeters can measure instantaneous flow and the effect of the flowing gas on the transit time of the ultrasonic signal [7]. A crystal is used for transmitting and receiving and it is placed externally and obliquely to the axis of the tube through which the gas flows [7]. The time elapsed will depend not only on the velocity, but on the temperature as well as composition of the gas analysed. One main advantage of this type of transducer is that unidirectional flow can be measured, which is applicable for clinical monitoring. Thermal-Convection Flowmeters Thermal sensing technologies are usually made of hot wires, metal film, and thermistol which all use heat to sense gas flow. The wires are heated by an electric current and the heat transfer is used to measure the gas flow [2]. The wire is heated above flow gas temperature, to associate temperature differences; a metal mesh is placed at both ends of the tube. This type of sensing is limited to only one flow direction, more sensors can be located in the tube for multiple directions and for breathing a calibration factor must be considered. [7]. Differential Pressure Flowmeters Flowmeters that use the relationship of pressure drop with airflow through a system. There include elements such flow resistors. Common Failures Figure Closed system during mechanical ventilation The most common failures presented in MV are mainly as a consequence of poor maintenance and user error. Leaks in the circuit due to bad connections or due by perforations in tube are a frequent dysfunction. Leaks stop the proper delivery of tidal volume as well as an accurate sensing flow from the ventilator. PEEP can also be affected by this interfering with O2 saturation (Fig. 9). At times, when an patient with intubation is not able to trigger the ventilator, or the ventilator senses by mistake a patients effort and delivers breaths, is known as patient-ventilator dyssynchrony. As a result the machine delivers an unsuitable breath to the rate of the patients inspiratory efforts. This type of error is also identified as trigger failure or desynchronisation, mismatching, and fighting the ventilator [8]. One cause for patient-ventilator dyssynchrony is fixing the trigger sensitivity improperly. When a desynchronisation with the patients efforts to initiate a breath exists, work of breathing can occur which can be accompanied with respiratory distress preventing pulmonary gas exchange.. Another usual failure is due to user error with the interface. MVs are complex equipments, and the need of the clinician to be familiar with the machine is crucial. It is important that Mechanical Ventilators count with an audible and visual alarm when detecting a leakage or disconnection. Possible hazards to humans Problems may occur while using a mechanical ventilator, especially with patients that been required the use of a MV for a prolonged amount of time. The risks occasioned by the use of respiratory support can lead to severe harmful or even death. Common hazards that may occur due to the use of a ventilator are: infections, pneumothorax, and lung injury. Infections The most common risk reported is acquiring Ventilator-associated pneumonia, which is caused by an infection. The tube allows germ (bacteria) to penetrate more easily into the lungs. This can cause pneumonia. Pneumonia can be a serious problem and may mean that a person may not be able to initiate respiration leading to a longer use of a MV. In addition a recent study reported factors related such as the development of shock, and renal failure [9]. In order to prevent infections a number of control procedures can be performed, and these include maintaining the ventilator as well as the breathing circuit [8]. Pneumothorax Occasionally when a part of the lung is weak, this may become over full of air and as a result an air leak may occur. The leak allows air into the space between the lung and chest wall. The air in this region occupies space in a manner that the lung begins to collapse. If there is air leakage, a chest tube into is used to drain the excess air; allowing the lung to re-expand and stop the leak. Lung Injury The pressure generated by introducing air into the lungs with a ventilator can damage the lungs. Furthermore, very high levels of oxygen can also be harmful to the lung. As a solution to try to keep this risk to a minimum the lowest pressure necessary as well as the only oxygen needed is supplied. Prolonged intubation usually defined as a period longer than 48 hours [10] may lead to swallowing dysfunction. This is mainly caused by impairing glottic closure reflex, reducing subglottic pressure, limiting laryngeal elevation, desensitizing the larynx and hypopharynx, and causing disuse muscle atrophy of the larynx and pharynx [10]. Advantages and limitations of various techniques Once analysed the principles of operations and risks of Mechanical Ventilators, for a better understanding of these is necessary to mention the advantages and disadvantages that they could bring. The impact MV have had over the past 40 years is massive due to the fact that mechanical ventilators provide vital support. Nowadays ventilators found in the market present vast options in terms of modes, control and displays which in many cases can result complicated and the knowledge of these is required[8]. In addition features need to be evaluated in order to establish which configuration mode is suitable for each patient [8]. Ideally hospitals should acquire equipment that incorporates the latest development in ventilation; however as mention before this could lead to complications and misuse of the devices. Requesting companies training to all staff involved in the use, handling and care of the equipment helps to reduce the risk [11].The complicity of the equipment could be considered as a disadvantage of MV, nevertheless ventilators with good human factors design provide major advantage [8]. Mechanical ventilators, being devices that provide respiratory support the duration and need may vary from patient to patient; age is also an important factor as well as the condition. Ventilators are usually used in patients that are in Intensive Care Unit (ICU) and after remaining in intubation after 48 hours the risk to the patient increases. Weaning from mechanical ventilation (MV) permits patients to restart spontaneous breathing steadily; however some risks are involved [12] and are mentioned in section. Risks and hazards to patients should always be considered when dealing with medical devices; however the benefits that they bring play a major role. But still as an advantage mechanical ventilators as mentioned before, bring vital support where initiation of breathing or respiration cannot be performed by the patient. Critical Comparison Figure Piston pump in HFOV Differences between each mechanical ventilator is defined by their operation mode which establish the flow pattern, pressure and volume delivered to the patient with the purpose of controlling alveolar ventilation and as a result achieve the goals of mechanical ventilation. Ventilation modes are determined by the combination of breathing pattern, type of ventilation and control. As for this MV operation mode is going to vary according to the age, and state of the patient, in a way that ventilation is provided and the risk is minimal. Requirements As mentioned before, the continuous use of ventilators may induce injury to the lungs. Air strained outside the normal air spaces creates a swelling pressure that may injure alveoli. The name of this condition is Barotrauma, and malfunction to the mechanical ventilation may occur. High pressures or volumes during inspiration, or when extreme PEEP is used are causes of Barotrauma. There has not been found an association of clinical injury with the level of pressure used, the problem is estimated to be an over expedition of volume [13]. High frequency ventilation(HFV) is a ventilation strategy for patients with respiratory failure; providing a small source of tidal volumes (VT) which is in most of the cases less than the anatomic dead space volume, with respiratory rates above 150rpm. Modern Research studies have shown that HFV can help reduce barotraumas in normal and injured lungs [14]. Figure Flow during high frequency ventilation HFV can be classified according to the source that generates their frequency and the type of exhalation phase; there are four types: High Frequency Jet Ventilation (HFJV), High Frequency Oscillatory Ventilation (HFOV), High Frequency Flow Interruption (HFFI), and High Frequency Positive Pressure Ventilation. The most commonly is used is the HFOV where in a continuous positive air pressure circuit the frequencies are oscillated by a piston pump (Fig. 10). During inspiration, each high frequency pulse in the flow creates a profile shaped like a bullet (Fig. 11), with the central molecules moving on beyond the airway than those found in the periphery. Table (2) describes and compares main differences between common ventilation and high frequency ventilation. Table Comparison between HF ventilator and Conventional ventilator HFV Conventional Ventilator Frequency is measured in Hertz (Hz) Frequency is measure in rpm Uses Displacement Volume (Vd) Uses Tidal Volume (Vt) Volume per minute is measured: Volume per minute is measured: Medical Devices Available on the Market There is a wide range of medical ventilators currently available on the market, and they all offer variety of options ranging in modes, variables monitored and ways of control [8] . Specific requirements and recommendations can be separated according to the complexity based on their performance. Some of the most common brands available nowadays are listed in table (3), and they all offer ventilators that may vary according to specific needs. Table Brands currently available Brand Model ACOMA ART-100 ART-21EX BIO-MED DEVICES CV-3 CV-4 DRAEGER Carina Home Evita 2 dura Evita 4 Evita XL Oxylog 1000 Oxylog 2000 Oxylog 3000 Savina EVENT MEDICAL Inspiration Inspiration LS GE HEALTHCARE(DATEX-OHMEDA) Centiva/5 Engstrom Carestation HAMILTON GALILEO GOLD RAPHAEL COLOR IMPACT Unit-Vent 754 INTERMED INTER5 PLUS/ GMX INTER PLUS VAPS/ GMX KIMURA KV-3N MAQUET Servo-i(Adult:Infant) Servo-S ( Adult: Pediatric) NEWPORT E100M E150 Breeze E360 E500 Wave PULMONETIC SYSTEMS/VYASIS HEALTHCARE LTV 900 LTVO 950 LTV 1000 RESPIRONICS Esprit SAIME ELISEE SIARE Siaretron 1000 ICU Siaretron 1000 IPER Siaretron 3000 ICU TAEMA eXtreria Horus 4 NEFTIS icu TECME Neumovent Graph TYCO HEALTHCARE PURITAN BENNETT 740 760 840 VERSAMED iVent201 VYASYS HEALTHCARE AVEA Vela Vela + Vela Comprehensive Future Stage of Development Advanced features like recording and accurate and advanced predictions will come in a future state of development. In addition the ability to link multiple devices on one is now available, where the ventilator monitor can display lectures from other devices. Portable devices are starting to become more common, they are light and compact devices. Important upgrades have been made to portable devices, where advanced features are now presented. Current portable ventilators present various modes of ventilation and longer power supply. In order to avoid complexity, it is important when developing new features to consider the principal use of ventilators, which is respiratory supply. In addition for longer term care many features may not be used and costs can increase. Conclusions Mechanical ventilators are vital equipments that provide vital support to a patient. They provide artificial respiration to patients that cannot breathe on their own. Their principle of operation is based on mechanical exchange of gases, and their circuitry includes electro-valves for their control and flowmeters as transducers. MV can become very complex devices, training of clinicians using them is crucial in order to avoid risks to patients. Hazards to patients may occur when used for more than 48 hours, however new techniques like high frequency ventilation can reduce this. There is a wide range of devices present on the market and they all vary on their modes of operation. Portable devices are now popular and present important features. Mechanical ventilators are used every day in hospitals and represent a critical part on vital support.

Letter to the Editor Essay -- Comment on World Poverty

Dear Editor, I was disgusted to read the letter from Mr I Amok, and the points he made on poverty. Where he said, â€Å"poverty isn’t that bad, only a few people are really poor†. I think that he hasn’t studied countries enough because countries in Africa have people that can’t even afford food, clean water and clothing as it is stated in the booklet where it said, "our water hole dried up". Where he said people just want us to â€Å"feel sorry for them†, they just want us to help them because it was our fault in most cases that they got in that situation, because when we were a empire they were self dependent but we told them to grow cotton but as the years have gone on the cotton market has crashed and they are no longer self dependent. He also said â€Å"charity begins at home because not everyone can afford a car†. A car is not important compared to food. People can live without cars, but people cant live without food it is not possible. World poverty is a growing issue I think mr I. Amok should be educated more on this situation. He may not realise all factors that are involved. In my opinion poverty is a massive factor in the third world countries and everywhere else that it affects and mr I. Amok does not understand it as he has shown in the letter. He goes that he heard somewhere that there is enough food in the world to feed everyone, this is true but the problem is the 20% of rich people in the world use 80% of the resources the... ...his. This would get them up and running so the could begin to plan for the future. Another way in which we could help if we were really desperate to help, is the could have a fair trade week were everywhere only sold products that fairly traded and this would help us to understand and it might even give the companies the urge to fair trade if they don’t all ready do so. I think our contribution to aid has helped the these countries but we cant just keep giving them it because could just stop everything and depend on our aid which would put them in a even worse position which we or they don’t wont to happen, although this may sound harsh we should give them aid if they are desperately in need of it so they don’t become dependent on the aid. I hope I have helped all the readers and especially Mr.Iamok. Yours truly,

Accounting treatment for capitalizing

Thank you for CA for accounting treatment in regards to your venture capital stake in Historiographers (Western). In our introductory meeting, you requested this firm to research on the accounting treatment for capitalizing the accumulated Meatball marketing consultancy charges uncured and the staff salaries. I am able to confirm that the marketing consultancy charges and the staff salaries can be capitalized and amortized over more than one taxpayer.In reaching this conclusion, I referred to relevant authority from codifications from the Financial Accounting Standards Board. In addition, I have also reviewed the documents provided to this firm during our earlier meeting. Facts The facts as was provided to us are as follows: Western hired a high-priced marketing consultancy company, Medievalist, to come-up with an integrated marketing strategy for computer game â€Å"Project. † Medievalist was tasked to develop a very catchy slogan that Western will use in a multimillion dolla r advertising campaign long with other things.Before the winning slogan was developed, they had presented others that Western rejected as unsuitable for Project's image. Therefore, Western has Incurred a marketing expense of $750,000. Western wants to capitalize charges for the rejected phrases but they reason that the rejected phrases were an integral part of developing the winning slogan. Western will also capitalize the costs of staff salaries of $300,000 for the time they spent in meetings with Medievalist. Western intends to amortize the capitalized amounts over the expected product-life f the game.Applicable Codifications The applicable codifications from Financial Accounting Standards Board (FAST) which addresses Westerns plans to capitalize the accumulated Medievalist charges and capitalize the staff salaries are as follows. Codification paragraph 720-15-55-3: The following costs that might be incurred in conjunction with start-up activities are subject to the provisions of this Subtopic a. Travel costs, employee salary-related costs, and consulting costs related to feasibility studies, accounting, legal, tax, and governmental affairs.Codification paragraph 720-15-45-1: Because is marketed to others, the expense shall be charged to cost of sales or a similar expense category. Codification paragraph 720-15-45-2: In an entity's balance sheet, capitalized software costs having a life of more than one year or one operating cycle shall be presented as another asset because the costs are an amortize intangible asset. Analysis Based on the provided facts of your venture stake in Western, it is clear that charges incurred through a consultancy contract with Medievalist is a part of the product placement under the implementation guidance paragraph.In addition, the staff salary is also a part of the implementation guidance paragraph as well. Recommendation Due to the shortness of time to turn this research project around, I suggest that we see the more detailed invoices from Medievalist along with the billable hours of the staff salaries allocated to working on the marketing development of a catchy slogan. Please call me at (415) 297-8060 , if you have any further questions concerning these findings.I also suggest that a follow up meeting next week to discuss the additional accumulation which may be needed to better conclude this research into the accounting treatment of your situation. Sincerely, for Golden Gate & Associates, Spas IRS Circular 230 Disclosure: To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (I) avoiding any tax penalty or promoting, marketing or recommending to another party any transaction or matter addressed herein.

Freuds psuchosexual stages of development essays

Freuds psuchosexual stages of development essays Freud really did make some major contributions to the field of psychology. He was the first one to suggest that psychological problems might have their roots in how children were treated. Freud believed that most of our personality is formed by early childhood, much of it so early that we dont even have conscious memories. For example, people who were toilet-trained strictly and at an early age grow up to be intolerant of mess, disorder and anything that doesnt go by the rules of how things are supposed to be. In the summer of 1929, one of Freuds patients, Herman Kleirman, wrote a letter to him in order to be able to understand a dream he had. The symbolism and depiction of this dream represents the different stages of Freuds theory of development. The first thing the patient remembers is that he was in a very dark and uncomfortable space. Soon after, he fell down a tunnel and ended up in a lake. This is the suggestion of the moment of birth, when the baby is still inside the mother (the dark spot). The tunnel he talks about is the birth canal through which he will come out and see the light for the first time. Up to that moment, the baby has been in water for nine months. So, once he is outside (in the lake), he starts to take oxygen. This is why he felt that the lake was filled with more than water, which is air. Next, the patient grasped onto something to save himself in the dream. This is the representation of the beginning of the oral stage for the baby. Now, the mouth is his only connection with the world. Grabbing and sucking are two of the only things that the baby can do at this point. As Freud indicates in his theory, little kids have the desire to Freuds psychosexual stages of development 3 suck all the time. They grab the mothers nipple for milk, as the man grabbed and ate that thing in the dream to save his life. He tasted something bitter and acidic. This...

In The Swimmer

It has been said that sometimes you have to look at where you have been to see where it is that you are going, but there are some people who fail to look at who they have become, and suddenly find themselves faced with a reality they dont remember or understand. In The Swimmer by John Cheever, (1964, Rpt. In Perrines Literature: Structure, Sound, and Sense. Ed. Thomas Arp. 7th ed. NY: Harcourt Brace, 1998. 392-401) Ned Merrill is one of those people. As Ned's travels progress, we watch as Ned unknowingly transforms from a young man on a midsummers afternoon to an old man faced with a tragic present as winter is beginning. When Ned Merrill started out his swim along the Lucinda River, he seemed to be a strong and lighthearted young man. Since it was the early afternoon of a midsummer Sunday, Ned set out for his 8-mile swim with expectations of beating his wife home for supper. The four pools that made up the first leg of the Lucinda River were met with no ill will. In fact, Ned was met with warm faces with open arms, and bars. After taking shelter in the Levys gazebo to avoid the storm, we receive the first clue that things are not quite as they seem for Ned's strange journey. With the appearances of the blighted maple, the slight nip to the air, the dismantled and overgrown riding ring, and the emptied pool, we are made aware of the passage of time that Ned ignores. Ned even goes to the extent of admitting his memory might be failing him, as he realizes that the Welchers have moved away. Ned is then confronted with what he feels will be his two biggest challenges. First, he must cross Route 424, spurring on the ridicule of passers by seeing him only in his swimming trunks. His second lies in the crossing of the public pool in the Recreation Center. He finds the thought of even entering the pool as contaminating himself, but persisted and found himself rejected from the...

Descriptivism Essay Example | Topics and Well Written Essays - 750 words

Descriptivism - Essay Example Seriously, this is just too much and makes communication in any language unenjoyably at all. However, descriptivism is making this better by allowing users of the language to apply it in a context that fits them. For instance, courts, restaurants, interviews, and parties among others settings have a different way of communicating information, expressing feeling, or giving advice. Therefore, descriptivism conforms to the reality of changing times, generations, and endorse the fact that understanding each other using whichever language is the most important thing. The issue of native and nonnatives is a discriminative in nature in the world where globalization is taking root. The reality of globalization is making interaction between people from different regions of the world unavoidable. During interactions between people either for political, social, and economic purposes; the only way to achieve the objective of such cause is via use of a language comprehend by parties involved. Whi le this happens, the parties involved use either an exotic language or one that is native to one of them, or both. In this light, the most important thing is the sympathetic of each other using whichever appropriate language (Kachru Yamuna, and Cecil 703). Remarkably, descriptivism facilitates this since it does not bar nonnatives of a language from the benefits of globalization. Descriptivism dismisses the need to learn a language using formal setting such as classroom or by reading publication on the grammar of the language (Kachru Yamuna, and Cecil 711).

How James Joyce Influenced the Opinion of The Readers Through Essay

How James Joyce Influenced the Opinion of The Readers Through Symbolisms In His Book The Dubliners - Essay Example The Dubliners by James Joyce is probably one of the few books that leave a lasting impression on the readers. Centered on the theme of paralysis and decay, this book leaves a strong impression on the readers with the use of symbolism and colors. The book is structured in such a way to show how the citizens eventually become trapped in the society of Dublin Ireland (Stone 1990). Written at the time when nationalism was at its peak in Ireland, â€Å"The Dubliners† give us a glimpse of how Joyce perceived the events in Ireland at that time. The point this work of Joyce wants to drive in the minds of his audience is that Dublin is the epitome of paralysis (Levin 1993) and the people in this society are suffering from decay (Friedrich 1990). True enough; the stories in the book are filled with disappointments, frustrations, the feeling of helpless and darkness. The book itself is divided into four parts namely, childhood, adolescence, maturity and public life (Levin 1993) which mak e it easier for the readers to focus on the type of character that the book in trying to portray. Technically, one can read through â€Å"The Dubliners† and treat it as a realistic and straightforward tales of every life filled with disappointments and failures or read the story at the symbolic level thereby interpreting the scenes and the characters of the story thereby transcending into another plane of understanding of the life in Dublin at the time the book was written. For the purpose of this paper, let us take the second option and try to understand how the symbolisms and settings in the book influence the perceptions of the readers and how these settings and symbolisms help the reader form a conclusion at the end of the story.