Introduction to Computer Information Systems Essay Example for Free

Introduction to Computer Information Systems Essay Computer software is no longer a major barrier to widespread use of wireless information systems. Introduction To know about the connection of these topics it is must to know about the link between these phrases as well as the basic concept of these two. Firstly, to know what is computer software and wireless Information systems and then secondly to discuss their effects upon each other. Computer software is basically some programs or events that are written just to achieve certain functions by the software engineers. Events are the set of steps that are written and combined to make a program. Now there arises a question that what is a program then the answer of this question is that: Programs are basically a set of rules and instructions on the basis of which a computer act to achieve certain functions. To perform a specific set of actions on computers intelligently or normally is the basic need to write a program. Wireless Information systems are basically the systems that used wirelessly. What is â€Å"Wireless† and why and how question arises then? â€Å"Wireless†, as its name, shows that it means some sort of transport of data and information among wireless devices without using wires. It can be used in form of mobiles, PDA’s, and on large scale â€Å"Radio† is the example of it. Wireless information systems can be the range of mobiles, wireless devices, and networks. The device used for it is basically a device that is installed first and then it can be used. (Wireless network and information processing system, 2008) Certain Dependencies In case of Wireless information systems, there are certain dependencies. Among those dependencies some of them are very basic and are: the mobility of the user mobility of the resource Explanation These dependencies can be differentiated in a way that in case of user mobility it can be in the form of traveling user whereas the case with the second dependency is that a network if created among multiple PDA’s and now in this case, if the PDA’s are moving. Along with this dependency, there is certain other as well. Just to be a focus on the actual behavior of the wireless and then wireless information systems only two are mentioned here to emphasize the main and important factors affecting the wireless in general. Important features to consider about There are certain tendencies that are important to know about these systems. According to these, Information systems have to develop first. While developing these systems a software engineer needs to know the protocols (specific rules of dealing on networks) and standard to follow up on them and then to develop finally (Feldman, 2007). There are certain standards that need to follow while considering wireless. In this way, there appears a need to select a standard according to the type of wireless information system. Those standards are as follows: IEE802.11 IEE802.11a IEE802.11b IEE802.11g IEE802.16 IEE802.16a Open Air Home based Blue tooth based Discussion After implementation of these steps, architecture to develop a software program is required. When these wireless systems developed then these should cope with the problem fairly in real time. If an architecture of software program is designed in such a way that it is safe for security flexibility and other issues as well. If technology is implemented selected in an improved way then an information system can work well. If there are leaks in the design and programming tactics and technology implementation then there would be a lot of leak in the system as well that result in a very severe or drastic problem. In this way, it can say that software programs that developed to resolve a problem need attention in all these metrics to work upon and to get a better result. If there is a better program written by a programmer who is reliable and portable, efficient and of strong functionality then fulfill the better requirement in this case. Whereas if we are talking about the wireless informa tion systems things become more sensitive as we are dealing on real-time and gather a lot of security risks. That’s why after applying and implementing rules and regulations and following the standards will get the better results. The use of wireless information systems is beneficial for the companies and organization in various ways, first of all, it is accessible in minimum resources. It reduces the time and mobility issues problem and enhances the productivity of the organization in this regard.(Wireless Networking in the developing world session 2007) The use of wireless management systems can improve the effectiveness of applying multiple procedures. An output of these procedures when resulted in a good form then increased or enhanced the productivity of the organization in a fast manner. Well, reputed industries, companies, and organizations are referring towards these wireless information systems that are very fast growing. Along with all this, there are still new advancements are just coming on the way to increase the quality of the projects or to attain the benefits of the technologies as much as it can be. References Phillip M. Feldman (2007), Emerging Commercial Mobile Wireless Technology and Standards Suitable for the Army: http://www.rand.org/pubs/monograph_reports/MR960/index.htmlWireless network and information processing system, (2008), Wireless network and information processing system, 2008: http://www.freepatentsonline.com/7433699.htmlWireless networking in the developing world session (2007), Wireless networking in the developing world session, Wireless Network: http://wirelesssummit.org/content/cwns-and-developing-world

Transition Elements and Coordination Compounds Analysis

Transition Elements and Coordination Compounds Analysis Manganese is a first row transition metal that has varies type of oxidation states when it appears as a compound. The oxidation range is from Mn(-III) till Mn(VII). This has shown that the compounds of manganese range in the oxidation number have a different of 10 electrons. The experiment 1 that we have done is changing oxidation state of manganese(II) chloride to an acetylacetonemanganese(III) with an oxidizing agent potassium permanganate. However, the main target compound that we are interested in this experiment 1 is the characterize complexes of 2 metal ions with the anion of acetylacetone. This compound is actually a typical a-diketone that can ionize in an aqueous solution as a weak acid. This is the main reason that the acetylacetonate anion will serve as a ligand towards metal ion and form new complexes. The ligand will bond to the metal through 2 oxygen atoms to form a six-membered ring. These six-membered rings (MO2C3) are in a planar shape and it is a weak aromatic. This is due to that they contain 6 Ï€ electrons. Thus, in the complexes of stoichiometry M(acac)3, there will be in a few different shapes. Such as the MO6 array is octahedral, for Cu(acac)2, the CuO4 group will be in square planar, and lastly for VO(acac)2, the VO5 group is in square pyramidal. As a result, the complexes are neutral in charge and they may be isolated as crystalline solids with interesting variety of colors. The equation for this experiment will be: MnCl2 + 4H2O → [Mn(H2O)4]Cl2 [Mn(H2O)4]Cl2 + 2HC5H7O2 + 2NaC2H3O2 → Mn(C5H7O2)2 + 2NaCl + 2HC2H3O2 Mn(C5H7O2)2 + KMnO4 + 7HC5H7O2 + HC2H3O2 → 5Mn(C5H7O2)3 + KC2H3O2 + 4H2O Cobalt is also another transition element that we are using in this experiment to form a coordination complexes. The cobalt 2+ ion is more stable than the cobalt 3+ ion for simple salts of cobalt. Therefore, there are only a few salts that are form with Co(II). However, the forming of complexes will eventually have a more stable oxidation state compare to the oxidation state of Co(II). In octahedral coordinated complexes, the number of complexes appears in a very stable conformation. Werner coordination complexes are compounds that formed between a transition metal ions and variety of organic and inorganic ions or neutral molecules. For both chloropentaamminecobalt(III) chloride and tris(acetylacetonato)manganese(III) also forms the octahedral coordination. In these complexes, it contains of six ligands (L) and a central atom (M) at the apices of an octahedron. For this experiment, the equation will be written as: Co2+ + NH4+ + 1/2H202 → [Co(NH3)5H2O]3+ [Co(NH3)5H2O]3+ + 3Cl- → [Co(NH3)5Cl]Cl2 + H2O Vanadium is also a transition element where it also exits in a variety of oxidation states which is from -3 to +5. Each of it undergoes a wide variety of chemistry depends on the electronic and steric nature of the coordinating ligands of it. For an example, in a higher oxidation states, vanadium is very oxophilic, but at low oxidation states, the Ï€-donating ligands such as dinitrogen and carbon monoxide are preferred. Therefore, the +4 and +5 states for vanadium are more important in biological reactions. The vanadium(IV) is dominated by the stable oxovanadium (VO2+) cation that remains intact during many reactions. While the deoxygenation of oxovanadium(IV) complexes to form a six-coordinate vanadium(IV) complexes will usually enhances their reactivity. In this situation, vanadium that is also a strong oxidizing agent will actually undergo redox in high possibilities when it involve in the reaction with organic molecules. Majority of vanadium(IV) complexes depend upon oxovanadium ion VO2+ complexes and the color for it is generally green or blue-green. This compound has oxygen atoms coordinating in the equatorial plane where the apical coordination will be the oxo group that complete the square pyramidal geometry coordination. It acts as a good precursor and undergoes ligand exchange reaction where one or both of the acetlyacetonato groups can easily be exchanged with organic ligands that having coordinating of different potentialities. For both of the complexes above is all in hexacoordinate with octahedral. However, there are many examples of coordination chemistry with coordination numbers from 3 to 9. Pentacoordinate complexes are much less common than either tetra- or hexacoordinate. This is more common for some metals, compound with one oxidation state and some others rare compound. There are mainly two types of geometries for it which is trigonal bipyramidal and square pyramidal. The bis(acetylacetonato)oxovanadium(IV) is our product in this experiment 3. In this experiment, the equation for it can be written as: V2O5 + 2H2SO4 + EtOH 2VOSO4 + 3H2O + CH3CHO VOSO4 + 2HC5H7O2 + Na2CO3 VO(C5H7O2)2 + Na2So4 + H2O + CO2 Discussion: Interpretation of IR spectrum for tris(acetylacetonato)manganese(III): Wavenumber (cm-1) Description of bands 1635.2 1506.5 -relative intensity : strong -(C=C) stretching -(C=CH) deformation 1386.9 -relative intensity : strong -(CH3)- symmetric C-H deformation 1255.6 -relative intensity : strong -(C=C) stretching -(C-CH3) stretching 1014.8 -relative intensity : strong -(CH3) out-of plane bending 924.5 -relative intensity : strong -(C-CH3) stretching 785.6 -relative intensity : strong -(C-H)deformation 678.1 -relative intensity : medium/ strong -(C-CH3)stretching,(O=C-CH3) deformation -(Mn-O) stretching indicates metal-ligand bond 458.3 relative intensity : weak (C=C) stretching,(C-CH3) stretching -(Mn-O) stretching that also indicatesmetal-ligand bond Interpretation of IR spectrum for bis(acetylacetonato)oxovanadium(IV): Wavenumber (cm-1) Description of bands 1559.0 1532.9 -relative intensity : medium (C=O) stretching -( C=C),(C=CH) stretching 1419.0 -relative intensity : medium -(CH3) deformation 1374.3 1357.9 -relative intensity : strong -(C=O) stretching -(CH3) deformation mode 1287.0 -relative intensity : strong -(C=C=C) stretching 997.4 -relative intensity : strong and sharp -stretching of V=O bond -it also indicates the metal-ligand bond.(1) 1021.7 -relative intensity : strong -(CH3) rocking 937.0 -relative intensity : strong -(C-CH3) stretching -(C=O) stretching 798.7 -relative intensity : medium -(C-H) out-of-plane bending 686.0 657.1 -relative intensity : medium/ weak -(ring) deformation out-of-plane bending for: 609.6 -(ring) deformation Interpretation of IR spectrum for chloropentaamminecobalt(III) chloride: Wavenumber (cm-1) Description of bands 1635.0 1559.0 -relative intensity : medium -degenerate asymmetric NH3stretching 1304.8 -relative intensity : strong -symmetric NH3angle deformation 837.7 -relative intensity : strong -NH3rocking 669.2 -(Co-N) stretching indicates metal-ligand bond(1) 486.2 -(Co-Cl) stretching indicates metal-ligand bond(1) There are suppose to have a symmetric NH3 stretch, 3169.3 cm-1 and an asymmetric NH3 stretch, 3289.3 cm-1 in the IR spectrum. These two spectrums are important to prove that there are two different chemical conditions for this NH3 ligand in this complex. This condition is actually due to the distortion geometry by chloride ligand. From 3 of the IR spectrum that we had obtains is that we are able to identify two error in it. First is the peak that going upwards at the region between 2000 cm-1 and 2500 cm-1. This error is due to the FT-IR spectrometry error as it can be shown in the comparison between the second IR spectrums that read by another spectrometry. Then, the following error is the very strong H2O that is mixed within the compound when we are doing the tablets. This very strong H2O is within the range of 3200 cm-1 to 3800 cm-1 region. Magnetic susceptibility Diamagnetic If the intensity of magnetization is negative, the material is said to be diamagnetic. This works when the density of lines that force inside the sample is less than that outside in this material. When it placed in an inhomogeneous magnetic field will tend to move to the region of lowest field. The repulsion that forms from the field will then produce energy in it. So, it is an endothermic process. Magnitude of the attractive force increase with the number of unpaired electrons that contain in the transition metal ion. Thus, the complexes that having a single unpaired d electron will interact less strongly with a magnetic field compared with complexes that have two unpaired electrons. So, complexes that contain no unpaired electrons are said to be diamagnetic and it is only weakly repelled by magnetic field. The figure is also very small as order of -1 to -10010-6 c.g.s e.m.u. In addition, it does not depend in the field strength and independent on temperature. In this experiment, th e chloropentaamminecobalt(III) chloride is a diamagnetic compound. The chloropentaamminecobalt(III) chloride has d6 electron configuration that is high spin. It is zero for the unpaired electrons in the orbital.(100) Paramagnetic If the intensity of magnetization of a paramagnetic is positive, hence ÃŽ ´w/ÃŽ ´H is negative and such a material will tend to move regions of maximum field strength since this is an exothermic process. The figure for the paramagnetic susceptibility is large and relative large as fall within the range of 100 to 100,00010-6 c.g.s e.m.u. In addition, it does not depend on magnetic field strength but do depend on temperature. Paramagnetic is a consequence of the interaction of and the spinangular momenta of unpaired electrons with the applied field. Complexes that have no unpaired electron in the orbital will have a magnetic moment that is as strong as it will attract each other stronger in the field. Thus this compound is paramagnetic. In this experiment, the bis(acetylacetonato)oxovanadium(IV) and tris(acetylacetonato)manganese(III) is a paramagnetic compound. The tris(acetylacetonato)manganese(III) has a d4 low spin of electron configuration with twp unpaired electrons. For the bis(acetylacetonato)oxovanadium(IV) has a d3 electron configuration that has 2 unpaired electrons within the orbital. So, this eventually states that both of the products are paramagnetic. (100) The Shape of the Compounds The shape for the bis(acetylacetonato)oxovanadium(IV) is actually in a shape of square pyramidal as I had mention in the introduction. The formation of a square pyramidal complex is due to the ligand that influences it. The steric effect between vanadium and the other oxygen bonding will tend to have competed among each other for the spacing with the other ligands in the metal bonding orbital. This effect can be observed in the decrease in the IR stretching frequency of the VO bond when there is a sixth ligand coordinates trans to oxygen. (9) The shape for penta is in Werner coordination as I have mention also in the introduction. It means that it is in an octahedron shape with a 6 coordination numbers. The ground state for octahedral complexes Mn(acac)3 which is the product of our experiment 1 of is a 5Eg (t2g 3eg1) position. The black manganese(III) acetylacetonate complex that which is the product of our experiment usually has an octahedral configuration. there actually exists of the Jahn teller distortion. Thus, it will be not a pure octahedral conformation. Then, it will have two forms for this compounds where one is with substantial tetrahedral elongation where two Mn-O bonds at 212 pm, and four at 193 pm and the other with moderate tetragonal compression where the two Mn-O bonds at 195 pm and four at 200 pm. Namely, The room temperature effective magnetic moments of the manganese(III) complexes with mixed ligands are in the range of 4.76-4.9 ÃŽ ¼B, which corresponds to four unpaired electrons typical of the d4 system. It is supposed that in mixed-ligand complexes the ligand has localized Ï€-bond and do not favor electron-pairing. The Jahn-Teller effect due to an unequal filling up of t2g and eg orbital yields a distorted octahedral geometry in complex. These complexes have a dark green to green color. The proposed structures of the complexes shown in Fig 3 are consistent with the related data (5).

COMPUTER SECURITY ISSUES :: Essays Papers

COMPUTER SECURITY ISSUES Computer Security Issues Facing Alsager Ltd. In upgrading the Alsager Ltd IT facilities, despite numerous advantages that the new systems brings one has to be made aware of the possible threats posing. Virus can effect the system. They are pieces of codes created by hacker to create a nuisances and to another extreme corrupt valuable data. Examples of these can be animated icons flying pass the computer screen and to another extreme can be programmes designed to delete the hard drive. The Computer Virus can be caught through a number of ways. The most highly publicised way, is through the Internet, other ways are through removable storage media, such as floppy disks and zip drives. They can also be caught through computer networks, where a third party from another machine in the network introduces the virus (accidental or otherwise) which then spread throughout the network. The most unlikely way of virus contaminating the system is through malicious employees creating them on the system but this will be discussed later on. There are a number of precautions that can be taken to help prevent this. By simply making employees not to use mobile storage media unless they know where it has been, making them aware that pirated media , shareware/freeware programmes may be potentially dangerous. A talk and leaflet distribution to employees could be useful. If the Alsager decides to connect to the Internet, this would be another potential source for virus and such like. A firewall could be placed on the system to help prevent infection. A more immediate way of preventing virus is to subscribe to a antivirus programmes, although this will not give you 100% percent protection it will help prevent the majority of known virus. An important note to this point, is the importance of getting regular virus updates from the software manufacturer. With the introduction of the IT facilities, the amount of room information takes up is drastically reduced from a whole filing cabinet to a small hard drive. Information can be easily copied and since the advent of the Internet, information does not even have to be on a psychical media to leave the building. This therefore makes it much more easier to copy and take out valuable information. All the companies details, there accounts and their customers account are prone to the risk. A single person can take out all the information on a zip disk or even a floppy disk depending on the size of the file.

Human Cloning: Science or Madness? Essay -- Argumentative Persuasive T

Human Cloning: Science or Madness?      Ã‚  Ã‚   Despite evidence that nearly all cloned animals are plagued by significant genetic abnormalities, two scientist groups have announced their plans to impregnate women with cloned embryos, each proposing to create the world's first cloned human being.    Clones are created by injecting genetic material from a single cell of one person is into an egg cell that has had its genes removed. The cell is then stimulated to act like a fertilized egg and divide, becoming an embryo. Once the embryo reaches an appropriate stage it is then implanted into a woman's womb, and the resulting baby would be like an identical twin to the donor.    Since the cloning of the sheep named Dolly in 1997, scientists have been working hard to create cloned human embryos for research and reproduction. During a hearing on human cloning, Panayiotis Zavos, a Kentucky based reproductive expert, told scientists, "The research must go on." Zavos is working with Italian fertility specialist Severino Antinori, who gained headline news in 1994 when he enabled a 62-year old woman to have a baby. Along with the Zavos and Antinori team are the scientists with Clonaid, an extraterrestrial Raelian movement based in Canada who claims cloning our bodies is the next step towards everlasting life.       Dr. Bridgette Boisselier is a Raelian Bishop and director of the human cloning project at Clonaid. The Raelian movement claims humanity was created by "space scientists," and "once we can clone exact replicas of ourselves, the next step will be to transfer our memory and personality into our newly cloned brains, which will allow us to truly live forever. Since we will be able to remember all our past, we wil... ...t proponents of human cloning claim this technology will help couples with infertility problems. Bragdon v. Abbot, 118 S.Ct. 2196 (1998), is cited as evidence that infertility is a disability and reproduction is a major life activity that is a fundamental human right. Human cloning advocates argue the development of a technology that can give an infertile and childless couple the right to reproduce, have a healthy biological child of their own, completing their biological "life cycle," is a constitutional right that should not be outlawed.    Works Cited: National Institutes of Health, NIH Update on Existing Human Embryonic Stem Cells, August 2001 The Associated Press, Votes Kill Efforts to Use Embryos for Research, August 2001 The White House: Office of the the Press Secretary, White House Fact Sheet Embryonic Stem Cell Research, August 2001   

Biopure Corporation

DATE:March 16, 2013 TO:Carl Rausch President and CEO of Biopure Corporation FROM:Hoang, Ann and Mishra, Ravi RE:Whether and When to Launch Oxyglobin Biopure needs to determine the best course of action to launch two new products, Oxyglobin a blood substitute for the veterinary market and Hemopure a blood substitute for the human market. Oxyglobin has been approved for commercial use and is ready for launch while Hemopure is expected to be FDA approved within two years. Biopure needs to decide whether and when to launch Oxyglobin.If decided to launch, the ability to price Oxyglobin appropriately is critical to minimize the impact of prospective launch for Hemopure. We believe Oxyglobin should be launched immediately because of realized potentials and benefits. The potentials are: to create a brand image for blood substitutes, to create a competitive advantage by first launch, to have the benefit of â€Å"go to market† with production, sales and distribution, and to create reven ues to launch Hemopure. The potential revenues earned from Oxyglobin could be used toward building another facility for manufacturing of Hemopure.The possible obstacles Biopure might encounter with Oxyglobin are: veterinarians may not recommend and/or perform blood transfusions, the ability to produce Oxyglobin when Hemopure is launched, and Biopure has little or no experience with launching of high R&D profile products. Oxyglobin can be launched successfully because it is FDA approved and will be first in the market as animal blood substitute. As indicated on the survey, veterinarians may not recommend the use of it because it is an expensive product; however, pet owners showed interest and preferred to be informed of alternative treatments for their pets.Therefore, Oxyglobin should be launched with a starting price of $200 per unit. Biopure should use in-house sales force to distribute Oxyglobin to save approximately 30% of the fees charged by the third party distributors. By laun ching Oxyglobin, Biopure will create revenues to continue with research and development for Hemopure. When Hemopure is launched, the marketing and distribution issues encountered during Oxyglobin launch can be avoided. Based on the SWOT analysis shown (Table 1: SWOT Analysis for Oxyglobin), we believe Biopure should start selling Oxyglobin immediately.To address Ted Jacobs’ argument regarding the size of the veterinary market and the price sensitivity, which may impact Hemopure’s price when launched; we believe that because of the physical characteristics of these two products (Oxyglobin is targeting veterinary market and Hemopure targeting human market), pricing would not be a major concern for the following reasons. Launching of Oxyglobin will create a competitive advantage because Oxyglobin is unique, first of its kind, first to market, and with no competition. Oxyglobin will achieve prominence as a breakthrough discovery product of the century.It would take the com petitors between 2 to 5 years for a new product to get approved and ready for market. Oxyglobin will proliferation Biopure’s reputation, credibility and have a greater impact on an IPO when the company decides to go public. Oxyglobin will generate revenues to boost Biopure development efforts ahead of its competitors in obtaining FDA approval for launching of Hemopure. Biopure will have a better knowledge and understanding of market strategies based on lessons learned from launching of Oxyglobin.In two years, Biopure would also have established a robust distribution network in time for launching of Hemopure. Launching of Oxyglobin will also minimize Biopure overall potential risks; if Oxyglobin fails, then the lessons learned would help to alter strategic decisions for launching of Hemopure (see Table 2: SWOT Analysis for Hemopure). Based on our analysis, we recommend that launching of Oxyglobin at this point instead of waiting for two years or more to launch Oxyglobin with H emopure represents the best solution to the primary concern facing Biopure at this time.If launched together, Biopure may be able to sell at a high price, and make more profit with per unit cost for both products. The overall profit would be minimal because there would not be as many units of each product to sell since Biopure has to share the same facility to manufacture Oxyglobin and Hemopure. Biopure would also lose out on the potential revenues it will generate to increase production capacity for Hemopure. There would be zero profit for two years which will not bode well with the stockholders. Exhibits STRENGTHS |WEAKNESS | | | | |FDA approval for commercial use as blood substitutes for the |Undesirable side effect such as discoloration of urine and | |veterinary market |gastrointestinal problems | |Competitive advantage, first company to receive approval for blood |Single manufacturing facility for Oxyglobin and Hemopure. |substitute of any type |Small veterinary market for Ox yglobin | |No competition for Oxyglobin |Price sensitivity within the veterinary market | |Possible brand image for â€Å"blood substitute† |No established network of distributors | |Sufficient source material e. . blood of cattle to support the full |Annual capacity of 300,000 units | |production capacity | | |Raw materials cost is $1. 0 per unit | | |OPPORTUNITIES |THREATS | | | | |Establish brand image/position for â€Å"blood substitute† products |Lower the market price for Oxyglobin may result inability to recoup | |Success of Oxyglobin will bring opportunity for Hemopure |development costs | | |Negative impact on the ability to appropriately price Hemopure | | |Competitors to enter the veterinary market with their own product | |Table 1: SWOT Analysis for Oxyglobin | |STRENGTHS |WEAKNESS | | | |Stored at room temperature |Single manufacturing facility for Oxyglobin and Hemopure. | |Disease free |Annual capacity of 150,000 units | |Longer shelf life for up to 2 years |Universal blood substitute | |Immediately 100% efficient at transporting oxygen |Short half-life | |Purity, efficacy and convenience |Potential of higher toxicity | |Raw materials cost is $1. 0 per unit | | |OPPORTUNITIES |THREATS | | | | |Experience in marketing of Oxyglobin |FDA rejects Hemopure | |Advantage for brand image for â€Å"blood substitutes† from Oxyglobin |Competition from Baxter’s HemAssist and Northfield’s PolyHeme | |Increase in demand for blood substitute is expected to increase with | | |the aging population | | |Table 2: SWOT Analysis for Hemopure |