Traditional And Citizen-Based Forms Of Journalism Essay

Traditional And Citizen-Based Forms Of Journalism - Essay Example The professional media draw their organizational authority and charge from their production of their work within the journalism norms. This means that traditional journalism entails professionally paid staff, officially recognized by the press (Reese et al., 2007). Such members of staff are trained and proficient in the journalistic dexterity and often have formal or ceremonial training. Advertising and subscriber support provides traditional journalism with the means to extensively distribute their listed product such as news, shows, and events. On the contrary, citizen journalism has its emergence from individuals and citizenry interest factions seeking to articulate thoughts or position within the civic discourse. Participants in the citizen journalism need not hold traditional journalistic code as a prerequisite for participation. By designation, these citizenry media command less financial feasibility and may be based on a subsidy, non-profit, or no revenue model at all (Reese e t al., 2007). Contributors only require motivation and willingness to have a word with the public. Unlike traditional journalism, citizen journalism creates lively and interactive conversations on personal sites, NGO) websites, chain emails, social media platforms, and message boards. Apparently, as shown above, the two models of journalism though having the same objective- informing the public of trends and news, they have distinct structures and approaches in operations for efficient service delivery.  

Social Change Essay Example | Topics and Well Written Essays - 250 words

Social Change - Essay Example Following this logic, I believe that the cases of illegal aliens committing criminal acts are exceptions beyond generalizations. Also if we take the statistics of total criminal acts that occurred in the same period of time, I am sure there will be an equal number of crimes committed by people of our own country as compared to people from outside. Because, every society, through its imperfections, generate a few criminals who can never be categorized based on where they were born. To prove my point, I searched the race-wise statistics of crimes in USA on internet and found that the crime ratio tilts towards non-whites. But this data refer to arrests that were made. We should not forget that there can be racial bias involved in these arrests. I have read in newspapers that several studies demonstrating this factor have come out in the recent years. My experience with immigrant friends tells me that people cannot be good or bad based on their place of birth. Even our forefathers were aliens to this land. Writers who look at this issue from a sociological perspective have opined that immigration is a more complex phenomenon than meets our primary inferences (Henslin 391). The attitude that the sanctuary cities have to retract this benevolent space given to illegal immigrants is against the spirit of global humanity and will amount to what scholars like Henslin have called as â€Å"a reactive social movement† (p.415). â€Å"Authoritarian personalities and frustration displaced towards scapegoats† is the right description to define the now-prevalent branding of all illegal immigrants as criminals (p. 416). I think the Mayor of Newark NJ is perfectly justified in saying that the immigration status of the suspected killers has nothing to do with the

Improvements of Waterways in the Philippines

Improvements of Waterways in the Philippines 1.0 INTRODUCTION For too long the waterways of the Philippines have been grossly contaminated through activities including domestic uses, industrial discharges, stormwater run-off, discharge of untreated sewage, recreational activities and the like. It has been recognised that for the health and safety of both the people of the Philippines and the protection of the environment for our future generations it is necessary that a strategy be established to commence the enormous task of returning our waterways to a quality that complies if not surpasses international standards. Water everywhere is a very valuable commodity and an essential element in sustaining life. For this reason we must act as a community to ensure that we return our waterways back to a standard we can be proud of. For this reason DENR will embark on a strategy which has one sole objective which is to â€Å"CLEAN UP THE WATERWAYS OF THE PHILIPPINES† This discussion document provides a brief outline on items that should be considered if the objective of Cleaning up the waterways of the Philippines is to be realised. 2.0 WATERWAYS HIERARCHY In any strategy it is imperative that there are several options available to the community to enable them to successfully implement the strategy and thus achieve the objective. So in summarising some of the objectives DENR will consider the use of a waterways hierarchy as shown below. The waterways hierarchy simply describes the preference of options with avoidance being the ultimate option and disposal being the least favourable. This analogy is based on the international standards for cleaner production and waste minimisation which ultimately encourage that generating no waste is better than managing the waste that is generated. WATERWAYS HIERARCHY AVOIDANCE (PREFERRED) REUSE/RECYCLING TREATMENT DISPOSAL (LEAST PREFERRED) In preparing these options consideration was given towards how these could be applied against a waterways hierarchy and the practicalities of implementing the options with respect to social, financial and environmental indicators. 3.0 STRATEGY OPTIONS AND RECOMMENDATIONS 3.1 Regulatory Framework The Philippines already has established several regulations pertaining to the management of waterways and the required quality that needs to be achieved by Industry and the community to ensure the waterways are protected. However, consideration needs to be given towards strengthening this legislation by addressing the following: Trade Waste Management (licensing and user pays system for industry discharging to the sewerage system) Littering Sewage plant discharge into inland and coastal waterways Management of Sewage spills and unauthorised discharges Algal bloom and nutrient management strategy Heavy fines for offenders Mandatory monitoring Establishment of Key Performance Indicators and Government targets for wastewater recycling and reuse. The above are only a few items that need to be considered in greater detail in order to ensure that the regulatory framework is in place to oblige the community to implement and continue to comply with the strategy. 3.2 Education, Training and Community Awareness Technology alone cannot solve all problems. In order for this strategy to be successful it must have obtained ownership from the community. They must be aware of their obligations with respect to the waterways hierarchy and we must tell the Philippines community how it can contribute towards the clean-up of the waterways. This will involve education programs both at a junior school level to engrain the importance of waterways and keeping them clean to ensure that the future generations avoid the mistake of returning to the old ways. The education programs need to also include local communities and industries so that they can see that there is a better way and that throwing that paper on the ground, or discharging untreated sewage in the river will make their life worse. We need to educate our community to demand a higher quality of life especially in relation to waterways and show them the benefits that a clean waterway can deliver. Things like better health, no rotten smell, increased tourism, better aesthetics, improved economic development and the like. Training environmental practitioners and industry leaders that pollution is bad business and that any dumping or inappropriate discharge into a waterway will have ramifications not only for the local environmental officer but for the senior officers of the company. These ramifications can include increased fines, bad publicity and in extreme situations imprisonment. Community awareness through targeted advertising campaigns could also get the message out. Adopting a community day once a year where the whole of Philippines gets together to clean up the waterways and the environment can achieve instant success and community pride that we all got together to improve our lives. Programs like these have been successfully implemented international such as â€Å"Clean up Australia†. There is no reason why there cannot be a clean-up Philippines. 3.3 Source Elimination Avoidance The first point in the waterways hierarchy is avoidance. This means removing polluting dischargers from the waterway itself. This includes industrial dischargers that are putting the industrial waste directly into inland waterways. Where the avoidance of the discharge cannot be achieved then industry should be required to ensure that the quality, through recycling and treatment at the discharge, meets strict discharge criteria. Avoiding the discharge of untreated sewage whether it is from ineffective wastewater treatment plants or direct discharge from the community. These inputs must be avoided or eliminated from being discharged into waterways as they can destroy a river system, generate unwanted odours, spread undesirable disease and the like. 3.4 Sewerage Management One of the issues faced in the Philippines is the difficulty of laying collection and sewer pipe infrastructure to enable wastewater in the form of sewage to be collected to a central location for treatment and disposal. For this reason it is essential that a number of options become available that can suit the varying topography and provincial needs of the Philippines. This can be achieved in two ways: Localised treatment plants that manage localised flows typically from 2.5KL/day to 40KL/day Medium sized Membrane bioreactor (MBR) technology typically from 40KL/day to 500KL/day Centralised wastewater systems based on MBR technology for areas where collection and laying pipe infrastructure is relatively easy. Examples of such plants are shown below: Localised wastewater treatment plants CWT Medium sized Plants Large MBR treatment plants (45ML/Day) Typical effluent quality The quality of the treated water from these treatment plants will enable reuse of this water for flushing toilets, irrigation, and industrial reuse and other non-consumption activities. 3.5 Storm Water Run-off Management There are several issues associated with the run-off and discharge of stormwater. These issues include collection of litter, oil and grease and other contaminants from roadways that then is discharged into the river system. Stormwater can also cause hydraulic overload and thus wash away sand and silt into the river. The silt and sand could contain heavy metals or other contaminants that will ultimately end up in the sediments of the river bed potentially creating undesirable conditions for aquatic species. Furthermore, the discharge of high levels of nitrogen collected from fertilisers and other similar processes will run-off into the river system and this contribute to the toxicity or provide adequate conditions for Algal Blooms to form. To alleviate this problem source control of run-off is essential. This will be a combination of improved infrastructure, stormwater capture and treatment of stormwater before discharge into the river. This has to be managed in light of stormwater hydraulics especially as many parts of the Philippines are subject to severe flooding. So treatment of say the first flush of stormwater after which the water is discharged directly to the river system bypassing the treatment. This option will treat the most contaminated portion of the stormwater but not restrict flow substantially to become a further cause of flooding. In looking at stormwater treatment there are four considerations, these are prevention, at source control, in-line structures and wetland/flood plains. Unfortunately not one of these systems in isolation can solve all the problems so wach system must be implemented in synergy. Some mitigation options that can be implemented include: Grate and entrance screens Side entry pit traps Baffled pits Litter collection baskets Boom diversion systems Release nets Trash racks Gross pollutant trap Circular screens Floating Debris Traps Some examples of these systems are shown below: Cleaning is the most important issue in the utilisation of these systems and adequate maintenance programs need to form part of the strategy of installing any form of Stormwater treatment and management system. 3.6 Emergency Response and Spill Management In any strategy that discusses the clean-up of waterways there must be an element to handle the unforseen spillage that do occur on a regular basis. The issue facing DENR is how it can become aware of these and how to implement appropriate mitigation options to protect human health and the environment from such events. It is therefore imperative that a system will be established that ensures that spillages to the environment are reported, that there is a plan for containment and that this containment can then provide enough time to determine an appropriate response for the economic clean up of the spill. Too often in emergency response companies and regulators rush to throw all options towards the resolution of such events that the end result is often created a larger problem than the spill itself. A classic example of this is when dispersants are being used for the management of oil spills. The dispersant has really only one option, alter the surface tension of water so as to make the oil miscible with the water and thus render the oil spill out of mind out of site. In reality what dispersants do is prolong the inevitable that is contamination of sea beds and shore lines. In almost all situations the oil spill will require more clean up at the shoreline due to the fact that waterway conditions hav e changed and the oil is now no longer miscible thus creating a similar situation several kilometres away from the original spill location. Thus any emergency response management system needs to deal with spill prevention, containment and removal not dilution. An example of alternative oil spill product that can be used instead of dispersants is Cleanmag. This product is briefly detailed below: CleanMag ® is an oil sorbing material in the form of magnetic granules. It is a porous material so the oil is absorbed upon contact with the CleanMag ® materials at ratios of 1:6 (1 ‘CleanMag 6 oil by weight). Due to a magnetic interaction all granules stay together forming a crust, which floats even after the oil has been absorbed and can be collected before the spill reaches the shoreline. In cases where the material does reach the coastline, the oil does not leak out due to strong cohesion onto the CleanMag ®, thus eliminating the devastating environmental impacts normally associated with oil spills reaching sensitive coastlines. The material and oil can be collected even days after CleanMag ® has been dispersed over the spill (by aerial or naval means), by using a magnetic conveyor belt or electromagnetic cranes mounted onto the collecting vessel (i.e. ship or tug). Should the oil spill extend to a large surface area ‘CleanMag ® can be sprayed on the boarders of the spill, thus creating a barrier and preventing oil dispersion.This helps slow down the rate of expansion of the surface of the spill and therefore creates more time for the clean up operation to be conducted. This time is important as it can enable more innovative recovery options that are less costly to the operator and furthermore minimize environmental penalties associated with such spillages, as the impact on the environment and communities is minimized. 3.7 Sediment clean-up Finally after the sources of pollution have been contained and managed consideration should then be given to dredging the sediments of the waterways with a view to removing the contaminants that have accumulated over several years. The final steps is necessary as the benefits of discharging clean high quality water that into the waterways system from the source control options mentioned earlier will not be realised. The reason for this is that the sediments will release contaminants and pollute the clean water. By cleaning these sediments it provides and opportunity for the life to return back to the waterway, free of pollution. So as a proud community lets CLEAN-UP THE WATERWAYS OF THE PHILIPPINES.

To Kill A Mockingbird Essays: Boo and Tom Misunderstood :: Kill Mockingbird essays

Boo and Tom Misunderstood in To Kill a Mockingbird In the novel, To Kill a Mockingbird, by Harper Lee, Atticus tells Jem and Scout to, "Shoot all the bluejays you want, if you can hit 'em, but remember it's a sin to kill a mockingbird," he is referring to the notion that a mockingbird is a harmless creature and does nothing but sing and bring happiness to the world. Harper Lee takes the title for her novel from this passage because the imagery of the mockingbird is analogous to the characters of both Boo Radley and Tom Robinson. These two characters are "harmless songbirds" who are sinfully destroyed. Although Boo Radley only actually physically appears in the story once, he serves two essential purposes. At the beginning of the novel, Boo serves as an enigma to the children, giving them something to make the focal point of their games, as well as a topic of conversation. As the story unfolds, it becomes clear that Boo embodies more character than most of the citizens of Maycomb, emerging as a symbol of what is truly just and right. Boo stands up for what he believes is right, no matter what people think of him. In the beginning of the story, Boo represents the unknown. The children wonder about Boo and his strange way of life, but really have no concept of who he is. At first, the children ask questions about Boo with regards to his "weird" living style. When this does not satisfy their curiosities, they make up games and stories about Boo which present him as being a monster. At one point, the children invade the Radley property in hopes of finding some clue which will better explain Boo's character As the story progresses, Boo becomes more of a symbol of kindness and bravery than that of the "town freak" which he is made out to be. Boo leaves presents for the children in the hollow trunk of an old tree, as well as covers Scout with a blanket during Miss Maudie's fire. However, it is not until he saves Jem and Scout's life from the hands of the deranged Mr. Ewell, that Boo shows his true heroic character. Even though Boo is a physically weaker man, he shows no fear when it comes to protecting Jem and Scout's life. It is not until after this rather odd episode that Scout is finally able to come to terms with her true feelings towards Boo.

Resisitivity Through Copper Wire

Measuring the Resistivity of Copper Wire of Different Lengths In this report I will be writing about the experiment I will conduct on copper wire of different lengths. The dependent variable I will be measuring is the resistance of the Copper wire. To do this experiment, one needs to obtain measurements with a high degree of accuracy, taking care of the equipment they use and measuring each value to a certain degree of accuracy for all results. The problem with measuring the resistivity of Copper wire is due to the properties of copper as a material.Copper naturally has a low resistance due to it being a superconductor, meaning that it only has a resistance of minute amounts. As it has this property, it is important to use a copper wire specimen that is long enough and thin enough to have an appreciable resistance. The normal value for the resistivity of copper is about 10-8? m. A 1m length of copper wire with a cross sectional area of 1mm? (10-6m? ) can be predicted to have a resist ance of 0. 01?. This can be calculated by using the resistance formula of: R=? lA? 10-8 ? m x 1m10-6m2=10-2? The wire I will use is going to be thinner than this and will vary in length from 0. -1. 0 metres with a difference of 0. 2m from the previous wire specimen. In total I will have 5 different lengths. Apparatus: * Voltmeter- Accuracy stated as ( ± 0. 5% Read. + 1dgt) in the user manual * Ammeter- Accuracy stated as ( ± 1. 2% Read. + 1dgt) in the user manual * Battery Supply of 6V * Copper Wire * 1m Ruler in cm * Scissors * Electrical Wires * Crocodile clips * Micrometer Method: The following procedure described below is how I intend to gain my results: 1. I will measure out the different lengths of copper wire I intend to use using a millimetre ruler to gain the most accurate results I can. 2. Once he lengths are cut, the diameter of the copper wire I am using must be measured. To gain the most accurate result, I will use a micrometer and measure the diameter in several pl aces on the wire and take an average value from these readings to work out the average cross sectional area. 3. I will connect the first length of wire into an electrical circuit, making sure that current can flow through the entire length of the copper wire connected. The circuit will look like this diagram: V V A A 4. The voltage will be recorded across the wire and the current running through it. 5. To find the resistance of the wire I will use the formula V=IR. . The resistivity can then be worked out using the formula: ? =RAL where R is the resistance calculated, A is the cross sectional area of the copper wire calculated and L is the length of the copper wire. The measurements shall be recorded in the following table shown below: Resistivity of Wire The physical properties of a wire can either be categorised as being an intrinsic property or an extrinsic property. The difference between the two categories of properties is that intrinsic properties do not depend on the amount o f material that is present, whereas extrinsic properties do depend on the amount of material that is present.In the following investigation of the resistivity of copper wire, one could say that the value of the voltage, resistance and current are all intrinsic properties of the copper wire. The extrinsic value of the copper wire would be its resistivity. The resistivity of the copper wire will be dependent on the material itself, which is copper. The resistivity of a material can be defined as the resistance of a 1m length with 1m? cross-sectional area. As the resistivity of material depends mainly on the properties of the material itself, each material whether it is copper or pure silicon has its own resistivity coefficient.The coefficient for copper is 1. 72 ? 10-8? m. This value may seem very small for resistivity, but if one were to know that copper is classed as a superconductor meaning that it conducts electricity extremely well, they would know that in order for the conductan ce to be very high, the resistivity must be very low. This can also be explained by the fact that resistivity is the inverse of conductivity (? =1? ). The potential difference across the copper wire (measured in volts) and the flow of charge (the current) through the copper wire are related through the resistance of the copper wire, not its resistivity.In order to find the resistivity, one needs to work out the resistance first by using the equation R=VI , and then from this they can use the formula ? =RAL to find the resistance. The â€Å"A† represents the cross-sectional area of the wire that will be used in the experiment. The resistance of the wire is expected to double in value when the length of the wire doubles in size. The resistivity however, should stay near enough the same throughout all of the repeats conducted. Reducing the uncertainty in the resultsThere are some factors which could affect the accuracy of my results in the experiment of the resistivity of copper wire. One of the factors which could affect the accuracy of my results is to do with the measuring devices I use to conduct the experiment. Any measuring device can only be used to measure to a certain degree of accuracy. It is this certain degree which determines how accurate your results are to the true value. In my experiment, I am using a 3? Digits Multifunction Multimeter (DMM) to measure the current through the circuit and the potential difference (p. d. ) across the copper wire.The main advantage of using a DMM compared to using an analogue voltmeter is the fact that they allow you to record a value to a certain number of decimal places by having different ranges which correspond to the level of precision of the reading. In the experiment I am conducting, I will be measuring the p. d. to a resolution of 0. 001V using the 2V range on the multimeter. Having the resolution to this degree of measurement ensures that I get a voltage reading to 3 decimal places increasing the accu racy of the reading and allowing me to obtain a closer value to the true value.The accuracy for the ammeter has been published as being  ±1. 2% of the reading + 1 LSD for the range (200mA) and resolution (0. 1mA) I will be using for the current. This means that the value I will record will be 1. 2% of the true value of the current +0. 1mA. I am using the 200mA range rather than the 20A range because the resolution of the result is greater than that of the 20A range. This will record a more accurate result which reduces the uncertainty in my results. Similarly the range I will use on the voltmeter which is at 2V has an accuracy of  ±0. 5% of the reading + 1 LSD, which is even more accurate.Another factor which can affect the resistivity of the result is the temperature of the copper wire. This can affect the resistivity by changing the value of the resistance to make the resistance less proportional to that of the length of wire. Normally the resistance of a wire will increase as the length of the wire increases due to their being more atoms in the wire for the electrons to pass by in order to get the through the entire length of wire. As the increase in resistance ? increase in length, the resistance should double when the length of the copper wire is doubled.In order to try and make sure the resistance is not affected by temperature, I will connect the copper wire up into the circuit at a low voltage so that the copper wire will not warm up and increase in resistance due to the atoms inside vibrating more. I will also be using a micrometer to measure the diameter of the wire. I am using a micrometer instead of a standard cm ruler because the level of uncertainty is far less than that of a ruler. The micrometer allows me to record a value for the diameter of the wire with an uncertainty of  ±0. 0005mm, whereas with an ordinary ruler with mm markings, the uncertainty would be  ±0. 1mm. Results:These are the results I collected from the experiment carrie d out. All of the data is raw data that I have collected myself and has not been manipulated in way at all. N. B- The diameter of the wire was measured to be 0. 435mm. The cross sectional area was calculated as being 1. 48? 10-7m2. This value was used throughout the experiment to work out the different resistivity values using the resistivity equation as stated previously. Repeat| Length of Wire (m)| Voltage (V)| Current (A)| Resistance (? )| Resistivity (? m)| 1| 0. 2| 0. 044| 1. 911| 0. 023| 1. 71E-08| 2| 0. 2| 0. 042| 1. 907| 0. 022| 1. 64E-08| 3| 0. 2| 0. 043| 1. 909| 0. 23| 1. 67E-08| 1| 0. 4| 0. 088| 1. 882| 0. 047| 1. 74E-08| 2| 0. 4| 0. 085| 1. 879| 0. 045| 1. 68E-08| 3| 0. 4| 0. 087| 1. 869| 0. 047| 1. 73E-08| 1| 0. 6| 0. 132| 1. 839| 0. 072| 1. 78E-08| 2| 0. 6| 0. 135| 1. 845| 0. 073| 1. 81E-08| 3| 0. 6| 0. 129| 1. 839| 0. 070| 1. 74E-08| 1| 0. 8| 0. 158| 1. 748| 0. 090| 1. 68E-08| 2| 0. 8| 0. 163| 1. 741| 0. 094| 1. 74E-08| 3| 0. 8| 0. 159| 1. 745| 0. 091| 1. 69E-08| 1| 1 . 0| 0. 207| 1. 739| 0. 119| 1. 77E-08| 2| 1. 0| 0. 209| 1. 738| 0. 120| 1. 79E-08| 3| 1. 0| 0. 201| 1. 710| 0. 118| 1. 75E-08| From the table above, I also worked out the averages of the results measured from the experiment.Repeat| Length of Wire (m)| Voltage (V)| Average V| Current (I)| Average I| Resistance (? )| Average R| Resistivity (? m)| 1| 0. 2| 0. 044| 0. 043| 1. 911| 1. 909| 0. 023| 0. 023| 1. 71E-08| 2| 0. 2| 0. 042| | 1. 907| | 0. 022| | 1. 64E-08| 3| 0. 2| 0. 043| | 1. 909| | 0. 023| | 1. 67E-08| 1| 0. 4| 0. 088| 0. 087| 1. 882| 1. 877| 0. 047| 0. 046| 1. 74E-08| 2| 0. 4| 0. 085| | 1. 879| | 0. 045| | 1. 68E-08| 3| 0. 4| 0. 087| | 1. 869| | 0. 047| | 1. 73E-08| 1| 0. 6| 0. 132| 0. 132| 1. 839| 1. 841| 0. 072| 0. 072| 1. 78E-08| 2| 0. 6| 0. 135| | 1. 845| | 0. 073| | 1. 81E-08| 3| 0. 6| 0. 129| | 1. 839| | 0. 70| | 1. 74E-08| 1| 0. 8| 0. 158| 0. 160| 1. 748| 1. 745| 0. 090| 0. 092| 1. 68E-08| 2| 0. 8| 0. 163| | 1. 741| | 0. 094| | 1. 74E-08| 3| 0. 8| 0. 159| | 1. 745| | 0. 091| | 1. 69E-08| 1| 1. 0| 0. 207| 0. 206| 1. 739| 1. 729| 0. 119| 0. 119| 1. 77E-08| 2| 1. 0| 0. 209| | 1. 738| | 0. 120| | 1. 79E-08| 3| 1. 0| 0. 201| | 1. 710| | 0. 118| | 1. 75E-08| Uncertainties within my results: Before creating the graph of my results, I calculated the overall uncertainties of each measurement within this experiment, so that I could see where the most uncertainty of the average resistivity value comes from.To calculate the uncertainty for each measurement, I took the average measurement that had the biggest difference from its original data. The Percentage of uncertainties of each measurement was as follows: * Percentage uncertainty of the Voltage V= 0. 206 ±0. 005 V Uncertainty in V= 0. 0050. 206? 100%?  ±2. 43% * Percentage uncertainty of the Current I=1. 729 ±0. 019 A Uncertainty in I=0. 0191. 729? 100%?  ±1. 10% * Percentage of Uncertainty in Resistance R=V/I Uncertainty of R=1. 10%+2. 43%?  ±3. 53% * Percentage of Uncertainty in Length Unce rtainty=0. 6 ±0. 001m Uncertainty in L=0. 0010. 6? 100%?  ±0. 17% Percentage of Uncertainty in Area: The Diameter of the wire is 0. 435 ±0. 0005mm The best area where the diameter is 0. 435mm A=? 0. 21752? 0. 1486mm2? 1. 486? 10-7m2 The Maximum area where the diameter is ? 0. 4355mm A=? 0. 217752? 0. 1489mm2? 1. 489? 10-7m2 The Minimum area where the diameter is ? 0. 4345mm A=? 0. 217252? 0. 1482mm2? 1. 482? 10-7m2 So the area is 0. 148 ±0. 0004mm2 with a percentage uncertainty of: A=0. 00040. 148? 100%?  ±0. 27% * So the percentage uncertainty in the Resistivity can be calculated as the sum of all the uncertainties in the experiment: ? =RAL=3. 53%+0. 27%+0. 17%= ±3. 97%The percentages of instrument error are as follows: * Voltmeter reading is  ±0. 0005V Instrumental error in Voltmeter= 0. 00050. 206? 100? 0. 24% * Ammeter reading is  ±0. 0005A Instrumental error in Ammeter=0. 00051. 729? 100? 0. 03% * Micrometer reading is  ±0. 0005mm Instrumental error in Mircome ter=0. 00050. 435? 100? 0. 11% * The total instrumental error is the total of each instrumental error stated above which would be 0. 38%. Graph 1: Graph 2: Data Analysis: In all of my results that I have collected, there is a strong relationship between the increasing length of wire and the value for the resistance.One would expect this strong correlation between the resistance and the length since one of the simple laws of electrical resistance is that it increases proportionally with the increase in the length of the wire. One can explain this through the understanding of electrons in a circuit and the atoms arranged within the components in a circuit. With my experiment of copper wire, a current passed through my circuit once a voltage was applied to the circuit. When the electrons were given energy to move they passed through the circuit to the copper wire where they experienced the resistance which was calculated.As the lengths of the copper wire increase, the amount of fixed a toms within the structure of the wire increases. Due to this the electrons have a higher chance of colliding with the fixed atoms, which causes the wire to heat up and increase the resistance. One can see the certainty in the correlation between the average resistance and the length of the copper wire by looking at the gradient of the line of best fit within graph 1. The gradient shows that R? =0. 9984, showing an extremely strong positive correlation between the two variables.From the equation of the gradient displayed in graph 1, the average resistivity can be calculated which takes into account all of the points within the data collected. The gradient of the line shows the equation Resistance (R)Length (L). In the calculation for resistivity, one not only needs the value of RL, but also needs the cross sectional area of the wire. If the cross sectional area of the wire is multiplied by the gradient, then the average resistivity can be calculated: ? =RAL=0. 1192? 1. 486? 10-7m2? 1 . 77? 10-8? m In Graph 2, the percentage of uncertainty of each average resistance was displayed in the vertical error bars.The percentage of uncertainty of the length of the wire was so small that it was not worth adding to the graph since it is extremely hard to see on the graph. From these percentage uncertainties of the average resistance in the experiment, one can calculate the maximum and the minimum values for the resistivity from looking at the gradients like we did for graph 1. To calculate the minimum gradient, I took the gradient of the line from the maximum uncertainty in the lowest resistance to the minimum uncertainty of the highest resistance.I did this to obtain the shallowest gradient possible from all the points on the graph. I then multiplied this gradient by the smallest area value. lowest ? =0. 1144? 1. 482? 10-7m2? 1. 70? 10-8? m For the maximum value of resistivity, I took the value of the gradient of the line from the minimum uncertainty in the lowest resista nce to the maximum uncertainty of the highest resistance. I did this to obtain the steepest gradient possible from all of the points on the graph. I then multiplied this by the maximum area. maximum ? =0. 1263? (1. 489? 10-7m2)? 1. 88? 10-8? mAfter looking at the average, minimum and maximum values of the resistivity taking into account all of the uncertainties within the calculation one could say that from the investigation conducted, the resistivity of copper wire is 1. 76? 10-8 ±1. 2? 10-9. The percentage uncertainty of the resistivity would then be: 1. 2? 10-91. 76? 10-8? 100%? 6. 8% Biggest Source of Uncertainty From looking at all of the percentage uncertainties for all my measurements, the resistance produced the most uncertainty. The uncertainty of resistance was worked out by adding up the uncertainty of the voltage and the current measured.It must have been from these two calculations where the uncertainty of the resistance became noticed. From calculating the instrument al errors of the multimeter used as a voltmeter and an ammeter, I would not conclude that the vast majority of the error came from the accuracy of the apparatus. I would say that the average resistance I calculated was from the average current which had the biggest difference from its original data, and the average voltage which had the biggest difference from its original data. The average data I had chosen was 0. 206 ±0. 05V and the average data I had chosen for current was 1. 729 ±0. 019A, as they had the biggest uncertainties. Due to this fact I would have produced an uncertainty which had the biggest difference from the original value, so the maximum possible uncertainty for the resistance. Anomalies and Systematic Errors I did not have any anomalous results when looking at the average resistance graph. All of the points plotted show strong correlation with the increase in length. Systematic errors may have contributed to some of my resistivity values being higher or lower than my overall average.An example of this could have been when measuring the diameter of the copper wire. The micrometer did not let me know if both of the sides of the copper wire were touching the micrometer measuring device sufficiently enough or whether or not it was touching both sides of the copper wire more than enough, which would then mean it squashed the diameter of the wire resulting in a lower diameter at certain points across the wire, since I took 3 readings and averaged them out. If this was the case, then one of my wires may have had a higher resistance than the others.One other systematic error may have come from the battery pack. It may have had a temporary glitch in which less electrical energy was sent through the circuit meaning less current was flowing through the circuit, resulting in a larger resistance than that of the previous recording with the same length of wire. This would also alter the final value of the resistivity. Another uncertainty which would b e counted as human error could have been the position at which I had placed the crocodile clips at either end of the copper wire.For the same length of wire, the crocodile clip may have been placed further away from the end of the copper wire than the previous measurement, meaning that the length of the wire would have decreased marginally which may have resulted in a lower resistance recording. Also, when I measured the length of the copper wire, I had to straighten out the length of the wire since it was coiled. When doing this I may have accidently pulled the length of the wire increasing its length by a fractional amount.Having said this, it may have altered the resistance measured in the wire making it larger than it should have been since the electrons have to travel a longer distance. Evaluation After looking at all of my results, I believe that the method I used and the ways of reducing the uncertainty in my experiment were effective. The instrumental errors were minimal and the overall uncertainty of my final calculation of resistivity was a low value. The resistivity value itself did alter but mainly stayed constant throughout the experiment.As I have said, I do not believe this was because of the accuracy of the multimeters I used but due to other factors such as changes in the environment like temperature, or due to systematic errors to do with the battery pack I used. To decrease the uncertainty in my resistance measured, I could use an even lower resolution on my voltmeter (0. 1mV) and ammeter (0. 001mA) to reduce the negative effect of Least Significant Digits (LSD) and to give the most accurate result.This way I could then increase the precision of my results and record a value which is closer to the true value When comparing my average value of resistivity with the published value of resistivity which is 1. 72? 10-8? m, my average value is very close to the published value which shows the level of accuracy throughout my experiment considering the more precise tools that were used by the professionals to gain the published value. The repeats I did helped me to record a value for the resistivity that was close to the published value by reducing the random uncertainty in my results.To gain even more accuracy I could do more repeats, or I could alter the intervals between each length to 0. 1m to increase my range of data. That way I will reduce even more random error within my data. I could also change the different diameters of the wire or change the material I use to compare these results with those and see how they differ. One other change I could do next time is to use an Alternating Current (AC) rather than a Direct Current (DC), since AC is more conventional in houses so it would have provided further information as to how good copper is in the use of houses.

Manual Inventory System Essay

Manual Inventory System involves all concerns within its transactions, on how the staff would be able to maintain the current status of their inventory, whether adding, deleting, and ordering a stock, the manual process consumes too much time for the staff and rigid time to process a transaction every year, the demand for the computer based systems for the businesses just keeps on growing. Companies have improved their old system for ease of work in accessing files and organizing records. Converting their old system into a much efficient computerized system, this will have a great effect on the grocery; this also helps ease the work to the staff maintaining the inventory. This contains the proposed inventory system for the store. It contains diagrams, data flows and flowcharts that describe on how the system flows. The proposed system utilizes the best way to organize the database type of system and to improve the services of the people involve. 1 Manually carry the products in each store , but if you use the computer and the other can be used to facilitate the bringing of products will improve the workers who are making it but still no use, so the difficulty manual workers because they do it, but persistent level for its workers and also requirements of shops and companies. A point of sale inventory management system allows a business owner to have more than one business location and adequately keep track of inventory at each without being present. No more worries about employee theft or pricing inconsistency between one location and another. 2In order not to sink the sale of products and requirements are also always looking at each along with your wither to be rising in the sale without having to fooling. Well not to worry, the boss of the company of the product taken. The way in which an organization manages its inventory levels has a significant impact on that organization’s profitability. If an organization is unable to anticipate product demand they could find themselves with inadequate product to meet customers’ needs or in a different regard too much product that remains unsold in the warehouse. 3 Should not keep the  product in a warehouse to be wasted and should also always much makes it to facilitate the sale. This barcode is also added to the documentation used during manufacturing and when a component has been identified as necessary, assembly line workers or assembler can scan the part number or numbers that they need and the parts will be ordering for delivery the next day from the supply warehouse. 4 To know also if not level for the product and should be will disposed. Selecting business software for inventory control must be intensely analyzed. Any manufacturer, distributor, warehouse or retail operation knows that controlling inventory and inventory levels can make or break your operation. Selecting the right business software for your inventory control system will enable you to successfully manage and control your inventory levels and costs. The foundation of this is your inventory database. 5 Because I need to correct sells products to sink and not yet settled to the manufacture of products and a successful business. Customers are ordering from the store every other day , the store personnel distribute drinks nearly 60-80 stores within the said area. The store sold approximately 90-100 cases of beverages in normal days and as far as possible the day they sold nearly two hundred cases of beverages while on off peak days they only sell eighty cases. At the end of the day, the shop keeper checks their stocks of how many drinks will be available for delivery on the next day anyway. The shop keeper also checks the cash on hand with receipts released today that they provided made their courier delivery to their customers in their area. They will verify if the cash in hand is equal from all receipts issued for the entire day. 6 I need no unclaimed money from the products in the unified confidentiality. Automated inventory is a system of keeping track of inventory on a perpetual basis. This type of inventory control ensures items are accounted for and that inflow and outflow status is updated on a continual basis. Automated inventory may be implemented through things like vending machines or with inventory management companies. Based on controlling costs, automated inventory systems track each item or product used in production or retail sales through an inventory software system. When the minimum quantity of an item is reached, an order can be placed immediately and automatically to  restock that item. This process takes into account the time needed for an order to be placed and for the company to receive and restock the item. An inventory system of this type can ensure enough products are available for sale so that customers do not go elsewhere to buy it.