Reflective Analysis of Viva Voce

Reflective Analysis of Viva Voce Introduction Viva voce and a reflection, both a requirement for successful completion of the course. For somebody not used to this form of assessment process, it is just but normal to ask oneself what? , why? and how?. Although a brief and complete orientation, description and information was provided in the early part of the curriculum, it is only in the end that I have fully understand its significance to my learning. Through the viva voce and a reflective writing that I was able to evaluate myself in terms of what I have learned? (Knowledge), what I can do? (Skills gained), and what I have become? (Attitude)†¦ A competent practitioner. A highlight that I have to address in the Intensive Care Course. For it is in a reflective practise that we gain new understanding and appreciation (Mann et al. 2009). Description This is a reflective piece about my viva voce that revolves around my care of a 73 year old male referred to as Mr X, 6 hours post Coronary Artery Bypass Graft. As he became hemodynamically compromised, I have discussed Mr. X’s assessment in relation to a normal physiological compensatory mechanism involve and the care given. Review of Mr. X history sheet and assessment details found in appendix 1, was suggestive of hypovolemic shock as further supported by his clinical symptoms. Clinically, it can be classified as mild, moderate or severe (Kelly, 2005). This leads to organ hypoperfusion characterized by tachycardia, hypotension, oliguria, decrease cardiac output and high Systemic Vascular Resistance (SVR) as a result of hypovolaemia. It can be due to excessive fluid loss such as haemorrhage, vomiting, diarrhoea, burns or inadequate fluid intake (Adam and Osborne, 2005). Strengths and Areas for Development Stress and anxiety, is always a major predicament that I had been most worried about. I have tried to alleviate this from reading, rehearsing and any other form of preparation needed one would have conceived about. In the end, the anticipation that your next, was the most gruelling. I believe, I was in its entirety at best well prepared, organized and chronological in my presentation of points and information with some hiccups along the way but acceptable although can be overall improve given the situation. Upon presentation of Mr. X’s assessment details and laboratory result, and concluded hypovolaemia as a cause of haemodynamic compromise based on supporting evidences, I, at some point, preceded in the discussion of physiological responses as a result of decrease in cardiac output. This is due to decrease in circulating blood volume. His Haemoglobin level was acceptable and there is no signs of active bleeding. During my discussion, I have mentioned about how low circulating blood volume results in decrease End Diastolic Volume (EDV). This stimulates the baroreceptors located at the aortic arch and carotid sinuses to send signal to the medullary centre of the brain which in turn causes the release of adrenalin and noradrenalin by the action of the adrenal medulla (Jevon and Evens, 2008). This supported why Mr. X is tachycardic. The human body compensates in various ways through the involvement of different organ system working together to establish haemostasis. In renal response I have mentioned the involvement of the Renin Angiotensin Aldosterone System. Not to be exhaustive with information, this involves the release of renin through the action of the juxtaglomerular cells stimulated because of decrease renal blood flow , which in turn is converted to angiotensin 1 by angiotensinogen. Angiotensin 1 is then transformed by the Angiotensin Converting Enzyme (ACE) predominantly found in the lungs to Angiotensin II, a potent vasoconstrictor. Furthermore, the release of aldosterone from the adrenal cortex causes increase in renal sodium and water retention. A surge in osmolarity in the blood stimulates the release of Antidiuretic hormone (ADH) or vasopressin from the posterior pituitary gland. This results in the reabsorption of solute free water in the distal tubules and collecting system of the kidneys and fu rther stimulates peripheral vasoconstriction (McGloin and McLeod, 2010). With the reabsorption of sodium and water, coupled with vasoconstriction the circulating blood volume is improved thus, result in the increase in the end diastolic volume. This improves muscle contraction of the heart and overall the cardiac output. Hence Mr. X low urine output. Although I felt satisfied about my presentation of cardiac and renal responses to a decrease in cardiac output, my explanation in regards to metabolic acidosis more specifically in the aspect of cellular anaerobic metabolism was somehow lacking in its content. Glucose being a major carbohydrate, is a fuel used by cells in our body. Its metabolism travels through a pathway called glycolysis with the end product referred to as pyruvate, a three carbon acid. Inside the cell with mitochondria and oxidative metabolism, this is converted completely into Co2 and water known as aerobic glycolysis (Baynes, n.d.). In contrary, lactic acid is the end product of anaerobic breakdown of glucose in the tissues during persistent oxygen deprivation secondary to an insult caused by decrease circulating blood volume, and owerwhelming of the bodies buffering abilities (Gunnerson et. al. 2013). These explains why Mr. X lactate shows an increasing pattern with a base excess noted at – 5.9. Familiarity and consistency in my opinion is my area of development. I need to continually update myself with the ever changing needs of the client more so, of the profession. This includes current research based guidelines and policies. From reading books, journals, articles, new discoveries or trends in the field of critical care. More importantly, to continue to look after haemodynamically compromised patients to help facilitate maintain and improve a level of my competency and skills in Intensive care nursing. Implication for Practice With the knowledge and skills that I have gained from the viva voce and looking after clients with haemodynamic instability, supported with theory during lectures and mentoring, I am better able to understand what is happening inside the body as is tries to compensates to maintain haemostasis. More importantly, act upon the needs of the patient, and anticipates interventions with rationales for doing so. With the knowledge and skills that I will be bringing back to the unit, I will be able to help enhance the standard of care through mentorship. References Adam, S. K. and Osbourne, S. (2005) Critical Care Nursing: Science and Practice. Second Edition. Oxford: Oxford University Press. Baynes, J. W. (n.d.) Anaerobic Metabolism of Glucose in the Red Blood Cells [online] Available from: http://molar.crb.ucp.pt/cursos/1 º e 2 º Ciclos Lics e Lics com Mests/MD/1 ºANO/2 ºSEM/12-UBA5/TPs/TP1/Baynes Cap11- Metabolismo da Glucose.pdf [Accessed12/12/13] Jevon, P. and Ewens, B. (2008) Monitoring of the Critically Ill Patient. Second Edition. Oxford: Blackwell Publishing Kelly, D. M. (2005) Critical Care Nursing. Volume 28, no. 1 pp 2-19. Lippincott. Williams and Williams, inc. Gunnerson, K et al. (2013) Lactic Acidosis[online] Available from: http://emedicine.medscape.com/article/167027-overview [Accessed12/12/13] Mann, K., Gordon, J. MacLeod, A. (2009) Reflection and reflective practice in health professions education: a systematic review. Adv Health Sci Educ Theory Practice, 14(4), 595-621. doi: 10.1007/s10459-007-9090-2 McGloin, S. and McLeod, A. (2010) Advance Practice in Critical Care – A Case Study Approach. Oxford. Blackwell Publishing Appendix 1 On the start of the shift , received a patient in ITU who is 73 years of age, now 6 hours post CABG. He has been weaned off sedation and now ready for extubation. Pre operatively his echo showed good LV. Upon review of his chart showed a blood pressure of 140/60 mmhg. Now fully awake, proceeded with extubation at 20:30. His risk factors are; prev. MI, HTN, DM type 2, high Cholesterol, smoker and TIA x2. At 22:00 his assessment findings are: HR 110- 120 bpm BP 85/55 mmhg MAP 55-60 mmhg CVP 2 Temp. 36.5 Urine output 25mls/ hr ( Weighs 85kg) GCS : E4V4M6 Mediatinal drain 25mls –serosanguineous Bloods: K+ 4.9 mmol/L Na 143 mmol/L Urea 8 mmol/L Creatinine 80 umol/L Hb. 9.0 g/L Hct 35% WBC 8.4 k/ul ABG’s pH 7.29 pCO2 5.54 kPa pO2 18.4 kPa HCO3 19.4 mmol/L BE -5.9 mmol/L Lactate 1.9 mmol/L He is on maintenance fluids of 85ml/hour 5% Dextrose, 2L of geloplasma cautiously given against CVP and eventually started on Noradrenaline to achieve a MAP of 70mmhg.

Microbiological routes for the production

Microbiological Paths For The Production Of Pharmaceutical Products.IntroductionMicrobiological Aspects Of PenicillinRecent publications and primary literature suggest that penicillin is an first-class curative agent which increases its demand for clinical application and chemical surveies. Microbiological production, chemical purification and isolation are major jobs associated with its usage. Penicillin is produced by Penicillium notatum in really infinitesimal measures and its civilizations were investigated for big scale production of penicillin. Cultures of P.notatum tend to spontaneously lose their penicillin-producing ability due to physiological or biochemical devolution. Penicillin activity straight depends upon the nature of strain. It is critical to choose strains of highest authority for maximal penicillin activity. All the strains are different from each other in their penicillin-forming ability. 1. Penicillin production in Penicillium Chrysogenum. Biosynthesis of lysine and Penicillin in Penicillium chrysogenum is regulated by ramifying point intermediate ?-aminoadipate. In penicillin tract, it is condensed with L-valine and L-cysteine to organize tripeptide by ACV synthetase. The internal ?-aminoadipate pool plays a critical function in lysine and penicillin biogenesis. The break of lys2 cistron directs the pool towards penicillin biogenesis ensuing in penicillin over-production. The targeted break was carried out by utilizing two different techniques and their consequence on penicillin production was studied. P.chrysogenum Wis 54-1255 ( low-level penicillin-producing strain ) and P.chrysogenum pyrG1 mutant strains were used in transmutation experiments. P. Chrysogenum L2, a lysine auxotroph was used as a control. Spores of P.chrysogenum were collected from home bases of power medium after holding grown for 5 yearss at 28Â °C. Two plasmids pDL1 and pDL7 which differed in selectable marker and size of DNA part homologous to a im were selected for break of lys2 by a individual crossing over. pDL1 includes ble ( phleomycin opposition ) cistron while pDL7 contains pyrG cistron as a selectable marker. Out of 495 transformants tested, 2 lysine auxotrophs ringers ( TD7-88 and TD7-115 ) were obtained. Both were unable to turn in Czapek medium supplemented with ?-aminoadipic acid while P.chrysogenum L2 ( command strain ) grew. These consequences proved that lys2 cistron is disrupted in TD7-88 and TD7-115 strains. Two plasmids pDL2 and pDL10 were constructed for break of lys2 cistron by dual recombination. Out of 964 transformants tested, merely one lysine auxotroph ( TD10-195 ) was obtained which was unable to turn in ?-aminoadipic acid supplemented Czapek medium. Transformants TD10-195 and TD7-115 were more stable without any reversion rate as compared to TD7-88 with really low degree of stableness. Although the growing of transformants were slower than parental strain in defined medium incorporating 4.0 Mm lys ine, the penicillin degrees were double from those observed in parental strain at 96, 120, and 144 H and threefold higher at 168 H. 2. Penicillin Production by Fungi turning on nutrient merchandises. Many fungous species widely used as commercial starting motors such as P.nalgiovense, P.chrysogenum, P. Verrucosum, P.griseofulvum and P.roqueforti were used to analyse the production of penicillin while turning on nutrient merchandises and presence of penicillin biosynthetic cistrons in Fungi of genus Penicillium. The synthesis of toxic compounds might besides be secreted to nutrient merchandises. All the strains were screened utilizing bio-assaies in both solid and liquid medium with Micrococcus luteus ATCC 9341 as a trial strain to observe penicillin production. Antibacterial activity was found in P.chrysogenum, P.griseofulvum NRRl 2300 and P.nalgiovense. ?-lactamase signifier Bacillus Cereus UL1 was used to prove whether the antibacterial activity was due to penicillin or other substance. Result indicate that antibacterial activity can be attributed to ?-lactam antibiotic penicillin. Agitation of liquid submerged civilizations of P.griseofulvam was carried out to corroborate peni cillin production which proved that P.griseofulvam strain NRRL 2300 had highest production degree. Southern smudge analysis was used to analyze the presence of penicillin biosynthetic cistrons. The presence of penicillin cistron bunch in P.griseofulvum proved that the antibacterial activity observed is due to penicillin. P.griseofulvum which is a possible beginning of penicillin in nutrient merchandises can be often isolated from maize, barley, wheat, flour etc. In instance of P. Verrucosum, the antibacterial activity observed was due to either patulin or penicilic acid as it contains merely one cistron of penicillin cistron bunch. Both patulin or penicilic acid are secondary metabolites produced by different strains of Fungi. In order to obtain safe and high quality nutrient merchandises, antibiotic and toxin production by nutrient micro-organisms should be analysed and studied in item. It besides helps to bring forth modified strains in which the synthesis of toxic compounds can b e eliminated without losing their food-ripening and flavorer belongingss. 3. Production of penicillin in methylotropic barm Hansenula polymorpha. -lactam antibiotics such as penicillin and Mefoxins are largest selling antibiotics against bacterial infections. Industrially, penicillin and Mefoxins are produced by filiform Fungis Penicillium.chrysogenum and Acremonium chrysogenum severally. The chief purpose was to present penicillin biogenesis tract into yeast Hansenula polymorpha as it is more various, easy to manage and cultivate with superior agitation belongingss as compared to filiform Fungis. In penicillin tract, peptide synthetase ?-L-cysteinyl-D-valine synthetase signifiers tripeptide ACV. It is converted into isopenicillin N ( IPN ) by enzyme isopenicillin N synthase ( IPNS ) . The pcbC cistron which encodes IPNS was cloned in H.polymorpha intoxicant oxidase booster in pHIPX4 and integrated at PAOX venue in H.polymorpha genome. A strain ( IPNS 4.2 ) incorporating pcbC look cassette was cultivated at 37Â °C on methyl alcohol medium to bring on PAOX. Wild type H.polymorpha serves as control strain. Aliquots were taken a t regular clip intervals to analyze IPNS protein. Western smudges prepared utilizing rough infusions of H.polymorpha and P.chrysogenum revealed that strain IPNS 4.2 produces an ?-IPNS specific protein. IPNS was produced at all growing temperatures in strain IPNS 4.2. In stationary growing stage, comparatively low IPNS protein degrees were observed in cells grown at 37Â °C. It was assumed that hapless or slow folding of protein at high temperature can be an intrinsic factor. However, IPNS protein was to the full stable and its degree was significantly enhanced at 25Â °C if compared to its production at 37Â °C and 30Â °C.The sum is comparable to highest penicillin bring forthing strains of P.Chrysogenum. Results indicate that penicillin production in heterologus barm was merely successful at decreased growing temperatures. As yeast genome does non encode non – ribosomal peptide synthetases such as ACVs, the following measure will be to infix functionally active ACVS in hete rologus host in order to present full penicillin biogenesis tract in H.polymorpha. 4. Penicillin production in surface civilizations of P.notatum. Two-liter Erlrnmeyer flasks incorporating czapek-Dox medium were inoculated with P.notatum and incubated at 25Â °C. It was tested for antibacterial activity against Staphylococcus aureus in alimentary stock by ordinary dilution methods. The pH of the medium fell from 6.5 to 3.0-4.0 and remained low throughout. Neutralized samples showed high antibacterial activity and batches runing from 10 to 100 liters were extracted with amyl ethanoate at pH 2. It was assumed that penicillin in these civilizations existed in non-extractable signifier. The pellicles were thin, without furrows or spores, and liquid with swoon xanthous touch. The antibacterial activity was extractible at pH 2 with organic dissolvers when the medium was supplemented with yeast infusion, brain-heart extract. In brown sugar medium ( dark brown sugar, 2 per cent ; NaNO3, 0.35 ; MgSO4.7 H20, 0.05 ; KCI, 0.05, KH2PO4, 0.15 ; FeSO4.7H20, 0.015 ) growing is more rapid and abundant accompanied by intense xanthous pigmentatio n ( chrysogenin ) as compared to czapek-Dox medium. The sourness falls in early phases from pH 5.5 to 4.5 and so rises to 8.0. Penicillin started roll uping on 5th twenty-four hours with upper limit on the eleventh to the 13th twenty-four hours. Maximum penicillin activity appeared after maximal growing was attained. All the sugar was consumed before maximal penicillin was accumulated. 5. Penicillin production in submersed civilizations of P.notatum. Experiments with submersed civilizations were conducted on machines agitating at rate of 60 to 90rpm, with maximal growing observed over a period of 6 to 10 yearss at 25Â °C. Brown sugar medium was distributed in 80-ml measures in 250-ml Erlenmeyer flasks and inoculated with a spore suspension of P.notatum, strain 832. The flasks were incubated at 25Â °C on a shaking machine. Growth commenced on the 2nd twenty-four hours with maximal growing appeared as little unit of ammunition pellets of mycelium. Penicillin started roll uping on 3rd or 4th twenty-four hours and reached its maximal value ( 20 to 30 oxford units per milliliter ) on 7th or 8th twenty-four hours. Organic fraction in brown sugar is responsible for penicillin-promoting capacity. Zinc besides had a catalyzing consequence. The shingle or submersed civilization technique provides better aeration as compared to come up civilization. By turning P.notatum strains in shake civilization, variable factors of diffusion and pell icle formation are eliminated, while growing and metabolic procedures are accelerated. Care of an equal O supply is indispensable in the penicillin production in submersed civilizations of P.notatum. 6. Aculeacin A Acylase as an industrial biocatalyst for production of penicillin Aculeacin A Acylase ( AuAAC ) from Actinoplanes utahensis NRRL 12052 catalyzes hydrolyses of acyl medieties of fungicidal antibiotics. As AuAAC was similar to ? -lactam acylase, it was investigated whether AuAAC would act as new ? -lactam acylase. An engineered aac cistron was made and cloned into look vector pEM4. The cistron was amplified by PCR utilizing chromosomal Deoxyribonucleic acid from A. utahensis NRRL 12052. Primers were designed harmonizing to the DNA sequence of aac cistron. Purified PCR merchandises were digested with XbaI and EcoRI endonuclease and cloned into pEM4 vector. The ensuing plasmid was so introduced in S.lividans 1326. The AuAAC output was 21-fold higher in recombinant strain produced by S. Lividans ( pEAAC ) as compared to A.utahensis. Its pureness was determined by Na dodecyl sulphate-polyacrylamide gel cataphoresis. The thermic stableness was studied by pre-incubating AAC for 20 min at different temperatures. It was stable up to 50Â °C and so reduced at higher temperature. It was determined that purified recombinant AuAAC is able to hydrolyse penicillin V. The kinetic parametric quantities for hydrolyses of different natural ?-lactam antibiotics were determined to analyze hydrolytic specificity of recombinant AuAAC. The pure recombinant enzyme was incubated with increasing concentrations of penicillins ( V, K, F, dihydroF, and G ) in 100 mM K phosphate buffer, pH 8.0 at 45Â °C for 15 min in 100 Â µl. AuAAC shows the same substrate specificity if compared to penicillin V acylase on natural penicillins. Penicillin K was best substrate for which AuAAC shows highest biomolecular changeless value of 34.79 mM-1 s-1. Result suggest that AuAAC from A.utahensis should be considered as new subfamily of ?-lactam acylases and it should besides be considered as an industrial biocatalyst for production of man-made penicillins.Mentions1. Finch, R. G. , Greenwood, D. , Norrby, S. R. & A ; Whitley, R. J. ( 2003 ) . Antibiotic and Chemotherapy. A nti-infective agents and their usage in therapy. ( 8th ed. ) . New York: Churchill Livingstone. 2. Hutter, R. , Leisinger, T. , Nuesch, J. & A ; Wehrli, W. ( 1978 ) . Antibiotics and Other Secondary Metabolites: Biosynthesis and Production. New York: Academic Press. 3. Flynn, E. H. ( 1972 ) . Cephalosporins and Penicillins.Chemistry and Biology. New York: Academic Press. 4. Casqueiro, J. , Gutierrez, S. , Banuelos, O. , Hijarrubia, M. J. & A ; Martin, J. F. ( 1999 ) . Gene Targeting in Penicillium chrysogenum: Break of the lys 2 Gene Leads to Penicillin Overproduction. Journal of Bacteriology, 181 ( 4 ) , 1181-1188. 5. Laich, F. , Fierro, F. & A ; Martin, J. F. ( 2002 ) . Production of Penicillin by Fungi Turning on Food Merchandises: Designation of a complete Penicillin Gene Cluster in Penicillium griseofulvum and a Truncated Cluster in Penicillium verrucosum. Applied and Environmental Microbiology, 68 ( 3 ) , 1211-1219. 6. Gidijala, L. , Bovenberg R. , Klaassen, P. , Van der Klei, I. J. , Veenhuis, M. & A ; Kiel, J.A. ( 2008 ) . Production of functionally active Penicillium chrysogenum isopenicillin N synthase in the barm Hansenula polymorpha. BMC Biotechnology,29 ( 8 ) , 1472-6750. 7. Torres-Bacete, J. , Hormigo, D. , Stuart, M. , Arroyo, M. , Torres, P. , Castillon, M.P. , et Al. ( 2007 ) . Newly Discovered Penicillin Acylase Activity of Aculeacin A Acylase from Actinoplanes utahensis. Applied and Environmental Microbiology,73 ( 16 ) 5378-5381. 8. Sprote, P. , Brakhage, A. A. & A ; Hynes, M. J. ( 2009 ) . Contribution of Peroxisomes to Penicillin Biosynthesis in Aspergillus nidulans. Eukaryotic Cell, 8 ( 3 ) , 421-423.

Business System Analysis and Design Notes

*IS:arrangement of people,data,processes,information technology that interact to collect,process,provide as output the info needed to support the organization. Types of IS: TPS,MIS,decision support system,communications and collaboration system,expert system, office automation system & executive info systemTypes of Stakeholders:System owners (middle and executive managers, supervisors),System users (clinical& service workers,technical and professional workers; suppliers,customers,employees),System Builders (network admin,security admin,data base programmer,system programmer),System Designers (web archs,graphic artists,network architectures),External service provider (sales engineers, technology engineers, system consultants),Project manager,System analyst:is a problem solver,he/she studies business probs and opportunities,then transform them into info that will be used by technical specialists.System analyst:specialist who studies problems and needs of an organization to determine ho w people,data,processes and info technology can best accomplish improvements for the business. Skills by System Analyst:Working knowledge of information technology(The analyst must be aware of both existing and emerging information technologies),Computer programming, experience and expertise,General business knowledge,General problem-solving skills,Good interpersonal communication skills,Good interpersonal relations skills,Flexibility and adaptability,Character and ethics. Info sys architecture:provides a foundation for organizing various components of any info sys you care to develop. a unifying framework into which various stakeholders with different perspectives can organize and view the fundamental building blocks of information systems. Views of knowledge System owners view: Interested not in raw data but in information. (Business entities and business rules) System users’view: View data as something recorded on forms,stored in file cabinets,recorded in books and spreads heets,or stored on computer.Focus on business issues as they pertain to data. Data requirement System designers’ view: Data structures,database schemas,fields,indexes,and constraints of particular database management system (DBMS). System builders’ view: SQL,DBMS or other data technologies Views of process System owners’view:Concerned with high-level processes called business functions.A cross-functional information system System users’view:Concerned with work that must be performed to provide the appropriate responses to business events. Business processes,Process requirements,Policy,Procedure, Work flow System designers’view:Concerned with which processes to automate and how to automate them. Software specifications System builders’view:Concerned with programming logic that implements automated processes. Application program,Prototyping Views of communication System owners’ view: Who? Where? What?System users’ view: Concerne d with the information system’s inputs and outputs. System designers’ view: Concerned with the technical design of both the user and the system-to-system communication interfaces. System builders’ view: Concerned with the construction, installation, testing and implementation of user and system-to-system interface solutions *Basic principles of system development: Get the system users involved. Use a problem-solving approach. Establish phases and activities. Document through development. Establish standards.Manage the process and projects. Justify systems as capital investments. Don’t be afraid to cancel or revise scope. Divide and conquer. Design systems for growth and change. The need to improve: Performance Info Eco/controlcosts Control/Security Efficiency Service Phases for system development: scope definition, problem analysis, requirements analysis, logical design, decision analysis, physical designand integration, construction and testing, installa tion and delivery. Cross life-cycle activity: Fact-finding, Documentation and presentation Documentation, Presentation, Repository), Feasibility analysis, Process and project management Routes through the basic systems development phases: model driven development strategies (process, data, object modeling), Rapid application development (RAD), commercial application package implementation, system maintenance *Benefits of use case modeling: Provides tool for capturing functional requirements. Assists in decomposing system into manageable pieces. Provides means of communicating with users/stakeholders concerning system functionality in language they understand.Provides means of identifying, assigning, tracking, controlling, and management system development activities. Provides aid in estimating project scope, effort, and schedule. The relationships that can appear on a use-case model diagram: Use case association relationship, extension use case, abstract use case, depends on, inheri tance Use case – a behaviorally related sequence of steps (scenario), both automated and manual, for the purpose of completing a single business task.Steps for preparing a use-case model: Identify business actors. Identify business use cases. Construct use-case model diagram. Documents business requirements use-case narratives *Data modeling(database modeling)–a technique for organizing and documenting a system’s data. Data Modeling Concepts:Entity(class of persons, places, objects, events, or concepts about which we need to capture and store data),Attribute(descriptive property or characteristic of an entity.Synonyms include element, property and field), Data type(property of an attribute that identifies what type of data can be stored in that attribute),Domain(a property of an attribute that defines what values an attribute can legitimately take on),Default value(the value that will be recorded if a value is not specified by the user),Key(an attribute, or a gr oup of attributes, that assumes a unique value for each entity instance. It is sometimes called an identifier),Subsetting criteria(an attribute whose finite values divide all entity instances into useful subsets.Sometimes called an inversion entry),Relationship(a natural business association that exists between one or more entities),Cardinality(the minimum and maximum number of occurrences of one entity that may be related to a single occurrence of the other entity),Degree(the number of entities that participate in the relationship),Recursive relationship(a relationship that exists between instances of the same entity),Foreign key(a primary key of an entity that is used in another entity to identify instances of a relationship),Parent entity(a data entity that contributes one or more attributes to another entity, called the child.In a one-to-many relationship the parent is the entity on the â€Å"one† side),Child entity(a data entity that derives one or more attributes from a nother entity, called the parent.In a one-to-many relationship the child is the entity on the â€Å"many† side),Nonidentifying relationship(relationship where each participating entity has its own independent primary key), Identifying relationship – relationship in which the parent entity’ key is also part of the primary key of the child entity,Generalization(a concept wherein the attributes that are common to several types of an entity are grouped into their own entity),Nonspecific relationship(relationship where many instances of an entity are associated with many instances of another entity.Also called many-to-many relationship) ,Sample CASE Tool Notations Entity relationship diagram (ERD):a data model utilizing several notations to depict data in terms of the entities and relationships described by that data. Logical Model Development Stages:1Context Data model(Includes only entities and relationships;To establish project scope). 2Key-based data model(Elimin ate nonspecific relationships;Add associative entities;Include primary and alternate keys;Precise cardinalities). Fully attributed data model(All remaining attributes;Subsetting criteria). 4Normalized data model Normalize a logical data model to remove impurities that can make a database unstable, inflexible, and nonscalable. First normal form (1NF):entity whose attributes have no more than one value for a single instance of that entity,Any attributes that can have multiple values actually describe a separate entity, possibly an entity and relationship.Second normal form (2NF):entity whose nonprimary-key attributes are dependent on the full primary key,Any nonkey attributes dependent on only part of the primary key should be moved to entity where that partial key is the full key,May require creating a new entity and relationship on the model. Third normal form (3NF):entity whose nonprimary-key attributes are not dependent on any other non-primary key attributes. *Model:pictorial rep resentation of reality.Logical model:nontechnical pictorial representation that depicts what a system is or does. Physical model:technical pictorial representation that depicts what a system is or does and how the system is implemented Process modeling:a technique used to organize and document a system’s processes. (Flow of data through processes,Logic,Policies,Procedures) Data flow diagram (DFD):a process model used to depict the flow of data through a system and the work or processing performed by the system.Synonyms are bubble chart, transformation graph, and process model. The DFD has also become a popular tool for business process redesign. Processes on DFDs can operate in parallel (at-the-same-time). DFDs show the flow of data through a system. Processes on a DFD can have dramatically different timing (daily, weekly, on demand) Context data flow diagram:a process model used to document the scope for a system. Also called the environmental model. Think of the system as a â€Å"black box. â€Å"2Ask users what business transactions the system must respond to. These are inputs, and the sources are external agents. 3Ask users what responses must be produced by the system. These are outputs, and the destinations are external agents. 4Identify any external data stores, if any. 5Draw a context diagram. Decomposition diagram:a tool used to depict the decomposition of a system. Also called hierarchy chart.

World Powers Should Focus On Eradicating Water Pollution

Did you know that 1.5 billion people in the world do not have safe drinking water? What if you were one of those unfortunate people? (Elements of Earth Science). Everyone needs to be informed in the matter. For instance, many people are being affected such as China, The United States of America, Australia, and other world powers. These world powers should focus on eradicating water pollution, which will eliminate many health risks that society and the environment faces. Water pollution is affecting many forms of life directly and indirectly throughout the globe; likewise, it can be disastrous for the future generations. For example, one of the most disastrous and harmful â€Å"types of† pollution deal with the factor of it being direct†¦show more content†¦Rain is a main factor to indirect pollution; specifically it is one of the most common causes that has harmed the environment. There are two main factors that make rain a main indirect pollutant. One example is that rain can wash pesticides into the streams and waters, harming more life. Rain can also be mixed with carbon dioxide, thus, when it rains. it creates acid rain, which can be harmful for trees and plants; likewise, it also can kill other fish and mammals. Rain is the not the problem though, it is the people who are making rain contribute to the problem (Elements of Earth Science). Pollution has been harming the environment just as it has been harming the human population. China has had to deal with many issues with the water that they are provided with. The China Pig Spill dealt with the slaughter and illegal dumping of diseased pigs, in which the authorities had to go fishing for 16,000 carcasses (Vorosmarty). China also had to deal with many polluted waters from all the contamination. For example in China 75 percent of the chinese population only have access to polluted water (Hogan); however, other countries also tend to suffer such as the United States and Australia. Australia has had to inform their residents to restrict water use, and the water dwindled to a six hour supply (Vorosmarty).Australia did this because there was a lot of disease in theShow MoreRelatedDevelopment vs Environment4686 Words   |  19 Pageshave been a wholly disruptive influence on a world which was paradise before their arrival.†[1] The condition of the environment today is well known to all and sundry. Deforestation, global warming, climate change, toxic pollution, and many more harmful phenomena, have spread all over the world at a pace so fast that the people of the world have had no time to react to it effectively. 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