Effect of Water to Cement Ratio on Concrete

Effect of Water to Cement Ratio on Concrete Introduction In construction projects, concrete, along with steel, wood, glass, etc, is one of the most essential materials that are needed for a successful manufacture of a structure. It one of the most common materials on a construction site and accounts for billions of pounds everywhere across the world. Due to ever-increasing machinery and technological advancements concrete can now be made of a mixture of compound materials, nevertheless the necessary components of concrete are course or fine aggregates, Portland Cement and water. In the current times, concrete structures are manufactured every day and to sustain a safe environment for people, so it is vital that that the structures that are built are sturdy, durable and do not cause any hazards to people. It is therefore a huge task for construction companies to guarantee that the structures that are built are done so to meet all the specific safety codes, British Standards or the Euro Code Standards. The properties of concrete are very vit al as they provide the necessary stability that structures are dependent on to maintain their sturdiness. As a result it is essential to research and be aware of the distinctive components of concrete and its properties, and how in this experiment these might affect the way that concrete performs when changing some variables.  (Richardson, 2002). The workability of a concrete mix gives a measure of the ease with which fresh concrete can be placed and compacted. The concrete should flow readily into the form and go around and cover the reinforcement, the mix should retain its consistency and the aggregates should not segregate. There are four factors that can affect the workability are: Consistency: The degree of consistency is depended on the nature of works and type of compaction. Water/cement Ratio or Water Control of a concrete: Water/cement ratio is the ratio of water in a mix to the weight of cement. The quality of water that required for a mix is depended on the mix proportions, types and grading of aggregate. Grading of Aggregate: The smooth and rounded aggregate will produce a more workable concrete than the sharp angular aggregate. Cement Content: The greater workability can be obtained with the higher cement content. Aims The aim of this experiment was to establish the effects of water to cement ratio on the  fresh properties of concrete (workability), and its effect on the hardened properties  of concrete (strength). Furthermore to increase the understanding in making a concrete mixture and working out the water content that needs to be added to the mixtures. And last to expand on the understanding of the importance of fresh and hard properties of concrete. Objectives The objectives of the experiment were to make three concrete mixtures by altering their water/cement ratios (0.47, 0.55 0.65) and to find out the water content to use for the three mixtures. To do a variety of tests such as the slump test, compacting factor test on fresh concrete and to carry out compressive and flexural strength tests of hardened concrete. Then finally to discuss how features such as variation in the water/cement ratio affects the workability  and strength of concrete. Theory Concrete Production, concrete is a mixture that is made up of three components, cement, water and aggregate. The water and cement are mixed together to produce a thick paste, to which then measured out aggregates are added to. The aggregates that are added are mainly composed of usual materials such as sand, gravel and crushed rocks, however due to the latest advanced technology; it has been known that other materials such as car tyres and crushed glass to be also used as aggregates. The cement is produced by blending limestone and clay, and burning it in a rotary kiln, this results in the formation of a clinker, to which gypsum is added. The mix is then ground down to fine powder cement, in which the most common is called Portland Cement. The cement/water slurry solidifies through a chemical reaction called hydration, the reaction produces immense heat so fresh concrete must by no means be handled with unprotected bare hands. During the winter season, temperatures drop below 2Âà ‚ °C, so the chemical hydration reaction may be very slow as heat is needed as a catalyst to speed up the collision of the particles. Therefore concrete pours during these seasons are not suitable as the concrete will not set. Initially this reaction is slow to start with, so this allows for the concrete to be transported and poured before it is hardened, and the theory states that complete 100% hydration takes place after 28 days. Properties of Concrete: There are four key properties that are desired in fresh concrete i.e.  good workability, compactability, mobility and stability. The most desired properties for  hardened concrete are strength and durability. The concrete should have compressive strength  (resist squeezing), tensile strength (resist stretching) and flexural strength (resist bending). All these strengths are highly dependent on the water/cement ratio and aggregate used in the  mixture, the degree of compaction and the age of the concrete. Curing concrete under water  over time allows hydration to continue hence giving it strength. The concrete used in this experiment was a C30 concrete grade and according to B.S. 5328  the compressive strength for this grade at 28 days is 30.0 N/ sq mm which can also be written  as 30 MPa which is adequate for use in beams, however this is only an estimation as there  are other factors (mentioned above) that affect concrete strength. In this experiment the slump  test and the compacting factor test were used to assess the workability and uniformity of  concrete. The deflection/ flexural strength test was carried out to evaluate the strength of the  concrete beam (mini beam sample) and find the failure load of the mini beam (100mm by  100mm by 500mm). The compressive strength was carried out to determine the maximum  failure load of the cube samples (150mm by 150mm) and the cylinder samples (150mm by  300mm) (Barnes 1992). MATERIALS AND EQUIPMENT Casting Equipment Concrete mixer Bucket (average size) Measuring Cylinder Shovel Wheel Borough Scale Figure 2: Shows Compaction Factor Apparatus. (used to determine workability of concrete  mixture) Figure 3: Slump Test Apparatus B.S. Slump cone (300mm high, tapering from a 100mm diameter top to a 200mm  diameter bottom) Slump rod (or steel tamping rod) (16 mm diameter, 600mm long, with rounded ends) Flat metal base plate (600 sq mm) (K0837225) Page 5 9. Metal Rule (300mm long) 10. Metal Scoop 11. Levelling Trowel 12. Waste rag 13. Vibrating Table 14. Moulds 6 no. Cube Moulds (150mm by 150mm) 3 no. Cylinder Moulds (150mm by 300mm) 3 no. Mini beam Moulds (100mm by 100mm by 500mm) 15. Materials Course Aggregates (Stones) Fine Aggregates (Sand) Cement Water (Tap) *Note: Aggregate used was natural aggregate used was from London. Therefore no need for  determining aggregate moisture content as aggregate is assumed to be laboratory dry to  SSD. Hence no considerable effect on water-cemet ratio. Striking Equipment 1. Pressure pipe (for striking cubes and cylinders) 2. Brushes (Soft and Hard metal brushes) 3. Oil, oil brush and rugs (for cleaning moulds before storing) 4. Crayon (for labelling concrete samples) 5. Curing room Testing Equipment 1. Compressive test machinery Figure 4: Shows the Compressive test machine used to apply loads on cubes and cylinder  samples 2. Deflection test machinery (Picture shown in figure 3. Load reader/display 4. Concrete samples 5. Digital Camera *Personal Protective Clothing was worn on all days of the experiment (Safety boots and Coats, individuals handling concrete wore protective gloves). METHODOLOGY Concrete Production: 1. Aggregates were readily weighed and placed into buckets. Quantities (constants) used in  all Concrete Mixes are shown below: Material Quantitative Weight (Kg) Cement (CEM1) 6.50 Fine Aggregate (Sand) 16.55 Natural Course Aggregate (Stones) 26.00 2. The amount of water required was determined by using the formulae shown below. Water content = (water/cement ratio) x cement weight. 3. Water was measured into a bucket using measuring cylinders. 4. The water/cement ratio was set as the variable between 3 Concrete Mixes (to determine  the effect of water/cement ratio on the strength and workability of the concrete). Water  content quantities used are shown on table 1. Table 1: Water/Cement Ratio (variable) for Concrete Mixes 1, 2 3 Concrete Mix Water/Cement Ratio Water Content (litres) 1 0.47 3 2 0.55 3.6 3 0.65 4.25 *See Appendix 1 for Actual Calculations Carried Out. 5. The concrete mixer paddles and pan were lightly dampened before aggregates were  placed in the mixer. 6. Course and fine aggregates were placed into the mixer and mixed for 30seconds. 7. Half the water required for the mix was added to the mixture and the contents were  further mixed for 1 minute. 8. The contents were covered and left for 8 minutes, to allow aggregates to absorb water,  (because aggregates are porous therefore they should soak in water into voids to get a good  mix and bonding with cementious (water/cement) paste). 9. Cement was spread evenly over the aggregates and mixed for 1 minute. 10. The remaining water was added and the contents were mixed for 2 minutes ensuring  homogeneity of the mix. 11. Workability tests were then carried out, in the order shown below. *Note; immediately after each test the used concrete was returned into the mixer and the contents were remixed for 30 seconds. FRESH CONCRETE TESTS Compacting Factor Test: 1. Trap doors of all hoppers were shut prior to beginning the test. 2. Sample of freshly mixed concrete was scooped from the mixer into the upper hopper, the  concrete sample was filled up to the brim of the upper hopper. 3. The trap-door of upper hopper was opened, to enable concrete to fall into the lower  hopper. 4. After all concrete had been collected onto lower hopper, the trap-door of the lower hopper  was then opened and the concrete allowed to fall into the cylinder. 5. Excess concrete remaining above the top level of the cylinder was then cut off using a  plane blade. 6. The concrete collected in the cylinder was then weighed. (This weight is known as the  weight of partially compacted concrete). 7. The concrete filled cylinder was vibrated to obtain full compaction, and more concrete  was added to the cylinder as required to ensure the vibrated/compacted concrete was  filled to the brim of the cylinder. 8. The now fully compacted concrete in the cylinder was weighed. 9. The compacting factor was then obtained using the formulae shown below. Compacting factor = (Weight of partially compacted concrete)/(Weight of fully  compacted concrete) Figure 5: Shows steps followed during the compacting factor test. 1) Compacting factor equipment. 2) Partially compacted weight is taken on a scale, 3) The concrete is vibrated/compacted  on a vibrating table and then the contents are toped up and vibrated to the rim container and the  partially compacted weight was taken. Slump Test: Concrete was thoroughly mixed in the concrete mixer. The slump cone was dampened to prevent concrete sticking to it. The slump cone/mould was placed on the centre of the metal plate and one individual was  asked to stand on the foot pieces on both sides of the mould. The mould was filled in 3 equal depth layers and each layer was rod 25 times using the  steel slump rod (ensuring even spread of blows covering over the whole area). Concrete was heaped over the top of the cone and with a rolling motion of the rod over  top of the mold the concrete was levelled thus removing the excess concrete. The spillage was carefully removed from the sides of the mould and the base plate   The mould/cone was carefully and slowly lifted vertically upwards. The slump cone was turned upside down and placed next to the molded concrete and the  rod was laid across the slump cone and the distance (slump) between the underside of the  rod and the highest point of the moulded concrete were read using a metal rule. There are different kinds of slump a collapsed slump, sheared slump and a true slump. The first two slump types indicate bad workability and a true slump indicates good  workability. Concrete Beam Casting Curing: Concrete was scooped out of the mixer into oiled moulds on the vibrating table (ensuring  even spread). Concrete was vibrated throughout the pour to eliminate voids and to enable compaction  of concrete by switching on the vibrating table. The vibrating motion also levelled the concrete. The concrete was left to set on the mould for 24 hours After which concrete was struck and placed in the curing room over 14 days. HARDENED CONCRETE TESTS Concrete Sample Testing: Compressive Strength Tests; were carried out on cube and cylinder samples. Flexural Strength Tests; were carried out in the mini beams. The machines where loaded with concrete sample and load applied was set to zero  before running the test. Base and top plates (spacers) were used to determine to provide platforms for the  concrete specimens and to also help provide even distribution of load. The load was applied by the machine till maximum failure load was reached. This reading was taken and the machine cleaned off concrete debris before running tests  for other samples. *Note the loading Pace Rates varied for different sample shape as shown below: Cylinders loading Pace Rate was set at 5.30 KN/s Cubes loading Pace Rate was set at 6.80 KN/s Mini Beams loading Pace Rate was set at 0.200 KN/s RESULTS 1. FRESH CONCRETE PROPERTIES TEST RESULTS Compacting Factor Test Results: Mix 1 Observations: The Concrete Mix appeared to be dry and did not pass through when the trap  door of the upper hopper was opened. The concrete mix was helped through the trap door to  the lower hopper by pushing it with a metal rod through the first trap door. The same was  done in order to get it through the second trap door into the container. This showed that it  was a bad mix with bad flowability, mobility and workability properties due to low water  content. Mix 2 Observations: The concrete mix was passed through the hopers with better ease than mix 1,  however only  ¼ of the contents went through, the rest was forced through both trap doors  with a metal rod. Therefore the flow ability and workability properties of this mix were bad,  but better than mix1, owing it to the increased water content in mix 2. Mix 3 Observations: The obtained concrete mix was a wet mix (a bit too wet) with what would  appear to be good flowability properties as all contents went through the hopers and trap  doors with one sweep and much ease. Therefore the flowability and workability properties  were the best observed for all 3 mixes, but too much water content is not good either. The compacting factor test was worked out for all the 3 Concrete Mixes and results are  shown in table 2 below. *The calculations were carried out on Microsoft Excel using the formula shown below. Compacting factor = (Weight of partially compacted concrete)/(Weight of fully  compacted concrete) BS 1881: Part 103 states that concrete is deemed unsuitable if its compacting factor is  below 0.70 or above 0.98. For normal concretes the compacting factor normally lies  between 0.80 and 0.92 (Jackson Dhir 1996). Apparent workability shown below was determined by using Compacting factor table in There was no slump as  the mix was too dry  therefore indicating  poor mobility,  flowability and  workability Collapsed slump was  obtained and the slump  exceeded the allowable  tolerance stated in BS  5328. The slump cone  was 300mm high and  the concrete mix  slumped by half that  value to 150mm. This  indicates that the mix  was too wet and this  affected its cohesive  properties. Very high *Apparent workability shown above was determined by using Slump Results Table shown  in Appendix 2 (Kew 2009). (K0837225) Page 12 Mix 1 Dry Mix/ Zero Slump Mix 2 Wet mix /13mm True Slump Mix3 Mix too wet/ collapsed slump Figure 7: Shows the Slump Results Obtained for concrete mixes with varying water  cement ratios. (Mix 1 w/c ratio 0.45, Mix 2 w/c ratio 0.55 and Mix 3 w/c ratio 0.65). 2. HARDENEDED CONCRETE PROPERTIES TEST RESULTS Figure 8: Shows the cube specimen being loaded into the compressing machine and on the right,  the classical cube hour glass failure mode on one of the cube specimen. Figure 9: Shows the cylinder specimen being loaded into the compressing machine and on the  right, the failure mode on 3 of the cylinder specimens. Figure 10: Shows a mini beam failing when subjected to Flexural Loads. This is the classical failure  mode of beams. The beam undergoes tensile and flexural strain resulting in bending and snapping of  the beam. Concrete is generally brittle and this makes it weak in tension. Hence the need for  reinforcement of concrete, steel is good in tension so it lends that quality to concrete, resulting in  better stronger structures. The results above are indicative of the effects of w/c ratio on the strength of concrete. At  0.45 w/c ratio the strength was 630.4 (Influence of test conditions. Table above show that specimen shape and size is also  influential on the compressive strength. Therefore measured strength of concrete is also  affected by height diameter ratio. This is to just show that test conditions can also affect the  determination of concrete strength. In BS 1881: Part 116 specifies that 150mm cube test are  only used for quality control purposes. Whereas BS 1881: Part 120 indicates that cylinder  test specimens are used to carry out compressive strength tests for in situ concrete and  precast members. A correction factories usually applied to the cylinder strength to obtain an  equivalent cube strength, it takes into account the specimen height /diameter ratio (i.e.  300mm/150mm = 2.). This explains the high compressive strength results obtained in  cylinder specimens than in cube specimens despite the being made off the same batch of  concrete. It should also be considered that the loading Pace Rates for c ubes (and cylinders  were varied. The trend obtained from the results shown above indicates that increasing w/c ratio increases  flexural strength. Af hydration strengthens the bonding between the cementious material and  the aggregates. However like all other factors, too much of anything is not good. If the mix  has excess water it will result in reduced flexural strength and results in bleeding of concrete  thus a weakened structure with pours in them. Again the normal distribution curve can me  expected with extremes. DISCUSSION One type of test is not enough to indicate the workability of the concrete as a whole. Use of  various tests bring out various properties that determine workability, for example, the  compacting factor can indicate how workable in the concrete will be in terms of how easily  can the concrete be vibrated and compacted. It is also a good indicator of the mobility and  flowability of concrete. It Shows how easily the concrete can be pumped from a concrete  skip into shutters, how easily the concrete will pass through the skip trap door when on  casting real structure on site. On the other hand the slump best indicates how workable the  concrete is in terms of its cohesive nature and segregation of its aggregates. It is important to  carry more than one of these tests to indicate various workability factors. These tests can also  be carried out at various stages between concrete production and casting. The common  construction site test (In situ test) is the slump tes t, it serves as the last point of quality check  prior to casting, and all other workability factors are normally carried out on the concrete  production sites. For example, the compactability factor will be most useful on production as  other mobility enhancing admixtures may be added prior to transporting concrete to site,  hence saving time, money and other complications that may arise from delaying site  programmes. From table 2 the results obtained from all mixes had compacting factors  between 0.70 and 0.98 hence indicating that all the tested concrete mixes would be  acceptable under the BS 1881. This certainly does not mean that all mixes had good  workability properties. Jackson Dhir (1996) state that some of the basic assumptions for  the test are not correct and should not be solely relied upon extensively as they can be  misleading. As concrete mixes can have same compacting factor but may not always require  the same amount of work to reach full c ompaction as compaction cannot be justified in the  true sense. From the results in table 2 it shows that changing the water/cement ratio affected  the compacting factor. Increasing the water cement ratio increased the compacting factor  therefore the workability of the concrete. All these tests have limits, for example placing  more water would have resulted in decreasing compactability factor as increasing the water  content will result in lowered compacting factors. (Compacting liquid materials do not result  in changes between partially compacted weight and fully compacted weight, hence if more  excess water is added the mix will have lower differences between partially compacted  weight and fully compacted weight. Hence giving rise to normal distribution curves for the  compressive tests. This also applies to flexural strength and durability of the concrete. CONCLUSION In conclusion it is clear that too little w/c ratio reduces the strength of concrete just as well as  too much w/c ratio will result in porous concrete. Therefore adequate amounts need to be  used to gain the best results. The best way of getting accurate assumptions on concrete is to  consider various factors. Increasing the water content ratio generally increases the strength  but may also result in shrinkage of the concrete hence altering durability and permeability  factors. Q1: Report all the results fresh properties (slump value and the shape of the slump) and  hardened properties (strength) of the concrete and comment on the results. See Results  Section for Answers. Q2: Why the need to measure the fresh and hardened properties of the concrete? Fresh properties are only of much importance in the stages of the concrete mix. These  help concrete producers spot problems early on the stage before structures are cast thus  potentially saving money, time and preventing unstable structures form being built by  spotting and correcting problems with concrete at an early stage. Also this helps prevent  the need to strike down newly built structures due to instability of concrete mixes used. Fresh properties can help indicate how much work labours will have to do on site and  consequently the energy and money that will be required when casting concrete on site. On the other hand hardened concrete properties are important in determining and the life  span of the concrete in the form of s concrete structure. The hardened properties are  important in observing and maintaining the strength of the structure and its durability. Other hardened factors are permeability and shrinkage of the concrete structures after  being built due to harsh weathers and conditions. The latter factors are of much  importance in structures like dams which require high water retaining properties.   Therefore both properties help in the development and maintenance of a good quality  structures and ensuring long life span. Whilst providing adequate safety to the habitats of  those structures. Q3: Concrete is usually tested at 28-Days for its compression strength. Why at 28-Days? The specimens should be cured under water and for normal concrete they should have  reached maximum strength at 28 Days. Concrete hardening process (Hydration) is  thought to reach its final strength in 28 Days as the reaction slows to a halt and adding  more water or curing concrete past that stage will sure minute or no further significant  changes in concrete strength. Q4: As for reinforced concrete beam, describe the need to place reinforced steel in  concrete beam, the purpose of cover/spacing, the diameter of the steel used and why  concrete beams need to be reinforced? Concrete is good in compression meaning it has high resilience to compressive forces but  is very weak in tension. As noted in the results the beams failed at much lower loads than  both cubes and cylinders, although there are other factors that play a role here that is the  general observation. Hence concrete reinforcement is required, it has good tensile  resilience and when concrete and steel are combined they result in components strong in  both tensile and compressive properties. The purpose of concrete cover is to protect steel  from corrosion, due to air reacting with steel and prevent rust formation due to water. Corrosion and rust results in weakened concrete structure as may result in loss of  resilience to tensile forces. So the concrete cove4r provides protection and a neutral  environment for steel. Concrete cover usually ranges around 500mm from the steel bars. Excess cover is not good as it makes the structure more susceptible to chipping and hence  weakens the cover itself and increases chances of steel corrosion taking place. The  diameter of steel used can vary according to the purpose of the structure but over  reinforcement can also bring about imbalances to the structural stability and may result in  a weakened structure. The normal diameter used ranges between 10-30mm, this makes it  easier to bend and alter on site as well as provide ease of manual handling for steel fixers.

Egoism and Altruism

1. Metaethics The term â€Å"meta† means after or beyond, and, consequently, the notion of metaethics involves a removed, or bird’s eye view of the entire project of ethics. We may define metaethics as the study of the origin and meaning of ethical concepts. When compared to normative ethics and applied ethics, the field of metaethics is the least precisely defined area of moral philosophy. It covers issues from moral semantics to moral epistemology[->0].Two issues, though, are prominent: (1) metaphysical issues concerning whether morality exists independently of humans, and (2) psychological issues concerning the underlying mental basis of our moral judgments and conduct. a. Metaphysical Issues: Objectivism and Relativism Metaphysics is the study of the kinds of things that exist in the universe. Some things in the universe are made of physical stuff, such as rocks; and perhaps other things are nonphysical in nature, such as thoughts, spirits, and gods.The metaphysical component of metaethics involves discovering specifically whether moral values are eternal truths that exist in a spirit-like realm, or simply human conventions. There are two general directions that discussions of this topic take, one other-worldly and one this-worldly. Proponents of the other-worldly view typically hold that moral values are objective[->1] in the sense that they exist in a spirit-like realm beyond subjective human conventions.They also hold that they are absolute, or eternal, in that they never change, and also that they are universal insofar as they apply to all rational creatures around the world and throughout time[->2]. The most dramatic example of this view is Plato[->3], who was inspired by the field of mathematics. When we look at numbers and mathematical relations, such as 1+1=2, they seem to be timeless concepts that never change, and apply everywhere in the universe. Humans do not invent numbers, and humans cannot alter them.Plato explained the eternal character of mathematics by stating that they are abstract entities that exist in a spirit-like realm. He noted that moral values also are absolute truths and thus are also abstract, spirit-like entities. In this sense, for Plato, moral values are spiritual objects. Medieval philosophers commonly grouped all moral principles together under the heading of â€Å"eternal law† which were also frequently seen as spirit-like objects. 17th century British philosopher Samuel Clarke described them as spirit-like relationships rather than spirit-like objects.In either case, though, they exist in a sprit-like realm. A different other-worldly approach to the metaphysical status of morality is divine commands issuing from God’s will. Sometimes called voluntarism (or divine command theory[->4]), this view was inspired by the notion of an all-powerful God[->5] who is in control of everything. God simply wills things, and they become reality. He wills the physical world into existence , he wills human life into existence and, similarly, he wills all moral values into existence.Proponents of this view, such as medieval philosopher William of Ockham[->6], believe that God wills moral principles, such as â€Å"murder is wrong,† and these exist in God’s mind as commands. God informs humans of these commands by implanting us with moral intuitions or revealing these commands in scripture. The second and more this-worldly approach to the metaphysical status of morality follows in the skeptical philosophical tradition, such as that articulated by Greek philosopher Sextus Empiricus, and denies the objective status of moral values.Technically, skeptics did not reject moral values themselves, but only denied that values exist as spirit-like objects, or as divine commands in the mind of God. Moral values, they argued, are strictly human inventions, a position that has since been called moral relativism[->7]. There are two distinct forms of moral relativism. The first is individual relativism, which holds that individual people create their own moral standards. Friedrich Nietzsche, for example, argued that the superhuman creates his or her morality distinct from and in reaction to the slave-like value system of the masses.The second is cultural relativism which maintains that morality is grounded in the approval of one’s society – and not simply in the preferences of individual people. This view was advocated by Sextus, and in more recent centuries by Michel Montaigne and William Graham Sumner. In addition to espousing skepticism and relativism, this-worldly approaches to the metaphysical status of morality deny the absolute and universal nature of morality and hold instead that moral values in fact change from society to society throughout time and throughout the world.They frequently attempt to defend their position by citing examples of values that differ dramatically from one culture to another, such as attitudes about po lygamy, homosexuality and human sacrifice. b. Psychological Issues in Metaethics A second area of metaethics involves the psychological basis of our moral judgments and conduct, particularly understanding what motivates us to be moral. We might explore this subject by asking the simple question, â€Å"Why be moral? † Even if I am aware of basic moral standards, such as don’t kill and don’t steal, this does not necessarily mean that I will be psychologically compelled to act on them.Some answers to the question â€Å"Why be moral? † are to avoid punishment, to gain praise[->8], to attain happiness, to be dignified, or to fit in with society. i. Egoism and Altruism One important area of moral psychology concerns the inherent selfishness of humans. 17th century British philosopher Thomas Hobbes[->9] held that many, if not all, of our actions are prompted by selfish desires. Even if an action seems selfless, such as donating to charity, there are still selfis h causes for this, such as experiencing power over other people.This view is called psychological egoism[->10] and maintains that self-oriented interests ultimately motivate all human actions. Closely related to psychological egoism is a view called psychological hedonism which is the view that pleasure is the specific driving force behind all of our actions. 18th century British philosopher Joseph Butler[->11] agreed that instinctive selfishness and pleasure prompt much of our conduct. However, Butler argued that we also have an inherent psychological capacity to show benevolence to others.This view is called psychological altruism and maintains that at least some of our actions are motivated by instinctive benevolence. ii. Emotion and Reason A second area of moral psychology involves a dispute concerning the role of reason in motivating moral actions. If, for example, I make the statement â€Å"abortion is morally wrong,† am I making a rational assessment or only expressing my feelings? On the one side of the dispute, 18th century British philosopher David Hume[->12] argued that moral assessments involve our emotions, and not our reason.We can amass all the reasons we want, but that alone will not constitute a moral assessment. We need a distinctly emotional reaction in order to make a moral pronouncement. Reason might be of service in giving us the relevant data, but, in Hume’s words, â€Å"reason is, and ought to be, the slave of the passions. † Inspired by Hume’s anti-rationalist views, some 20th century philosophers, most notably A. J. Ayer, similarly denied that moral assessments are factual descriptions. For example, although the statement â€Å"it is good to donate to charity† may on the surface look as though it is a factual description about charity, it is not.Instead, a moral utterance like this involves two things. First, I (the speaker) I am expressing my personal feelings of approval about charitable donations and I am in essence saying â€Å"Hooray for charity! † This is called the emotive element insofar as I am expressing my emotions about some specific behavior. Second, I (the speaker) am trying to get you to donate to charity and am essentially giving the command, â€Å"Donate to charity! † This is called the prescriptive element in the sense that I am prescribing some specific behavior.From Hume’s day forward, more rationally-minded philosophers have opposed these emotive theories of ethics (see non-cognitivism in ethics[->13]) and instead argued that moral assessments are indeed acts of reason. 18th century German philosopher Immanuel Kant[->14] is a case in point. Although emotional factors often do influence our conduct, he argued, we should nevertheless resist that kind of sway. Instead, true moral action is motivated only by reason when it is free from emotions and desires.A recent rationalist approach, offered by Kurt Baier (1958), was proposed in direct o pposition to the emotivist and prescriptivist theories of Ayer and others. Baier focuses more broadly on the reasoning and argumentation process that takes place when making moral choices. All of our moral choices are, or at least can be, backed by some reason or justification. If I claim that it is wrong to steal someone’s car, then I should be able to justify my claim with some kind of argument. For example, I could argue that stealing Smith’s car is wrong since this would upset her, violate her ownership rights, or put the thief at risk of getting caught.According to Baier, then, proper moral decision making involves giving the best reasons in support of one course of action versus another. iii. Male and Female Morality A third area of moral psychology focuses on whether there is a distinctly female approach to ethics that is grounded in the psychological differences between men and women. Discussions of this issue focus on two claims: (1) traditional morality is ma le-centered, and (2) there is a unique female perspective of the world which can be shaped into a value theory.According to many feminist philosophers, traditional morality is male-centered since it is modeled after practices that have been traditionally male-dominated, such as acquiring property, engaging in business contracts, and governing societies. The rigid systems of rules required for trade and government were then taken as models for the creation of equally rigid systems of moral rules, such as lists of rights and duties. Women, by contrast, have traditionally had a nurturing role by raising children and overseeing domestic life. These tasks require less rule following, and more spontaneous and creative action.Using the woman’s experience as a model for moral theory, then, the basis of morality would be spontaneously caring for others as would be appropriate in each unique circumstance. On this model, the agent becomes part of the situation and acts caringly within t hat context. This stands in contrast with male-modeled morality where the agent is a mechanical actor who performs his required duty, but can remain distanced from and unaffected by the situation. A care-based approach to morality, as it is sometimes called, is offered by feminist ethicists as either a replacement for or a supplement to traditional male-modeled moral systems. . Normative Ethics Normative ethics involves arriving at moral standards that regulate right and wrong conduct. In a sense, it is a search for an ideal litmus test of proper behavior. The Golden Rule is a classic example of a normative principle: We should do to others what we would want others to do to us. Since I do not want my neighbor to steal my car, then it is wrong for me to steal her car. Since I would want people to feed me if I was starving, then I should help feed starving people. Using this same reasoning, I can theoretically determine whether any possible action is right or wrong.So, based on the G olden Rule, it would also be wrong for me to lie to, harass, victimize, assault, or kill others. The Golden Rule is an example of a normative theory that establishes a single principle against which we judge all actions. Other normative theories focus on a set of foundational principles, or a set of good character traits. The key assumption in normative ethics is that there is only one ultimate criterion of moral conduct, whether it is a single rule or a set of principles. Three strategies will be noted here: (1) virtue theories, (2) duty theories, and (3) consequentialist theories. . Virtue Theories Many philosophers believe that morality consists of following precisely defined rules of conduct, such as â€Å"don’t kill,† or â€Å"don’t steal. † Presumably, I must learn these rules, and then make sure each of my actions live up to the rules. Virtue ethics[->15], however, places less emphasis on learning rules, and instead stresses the importance of devel oping good habits of character, such as benevolence (see moral character[->16]). Once I’ve acquired benevolence, for example, I will then habitually act in a benevolent manner.Historically, virtue theory is one of the oldest normative traditions in Western philosophy, having its roots in ancient Greek civilization. Plato emphasized four virtues in particular, which were later called cardinal virtues: wisdom, courage, temperance and justice. Other important virtues are fortitude, generosity, self-respect, good temper, and sincerity. In addition to advocating good habits of character, virtue theorists hold that we should avoid acquiring bad character traits, or vices, such as cowardice, insensibility, injustice, and vanity.Virtue theory emphasizes moral education since virtuous character traits are developed in one’s youth. Adults, therefore, are responsible for instilling virtues in the young. Aristotle[->17] argued that virtues are good habits that we acquire, which re gulate our emotions. For example, in response to my natural feelings of fear, I should develop the virtue of courage which allows me to be firm when facing danger. Analyzing 11 specific virtues, Aristotle argued that most virtues fall at a mean between more extreme character traits.With courage, for example, if I do not have enough courage, I develop the disposition of cowardice, which is a vice. If I have too much courage I develop the disposition of rashness which is also a vice. According to Aristotle, it is not an easy task to find the perfect mean between extreme character traits. In fact, we need assistance from our reason to do this. After Aristotle, medieval theologians supplemented Greek lists of virtues with three Christian ones, or theological virtues: faith, hope, and charity.Interest in virtue theory continued through the middle ages and declined in the 19th century with the rise of alternative moral theories below. In the mid 20th century virtue theory received special attention from philosophers who believed that more recent approaches ethical theories were misguided for focusing too heavily on rules and actions, rather than on virtuous character traits. Alasdaire MacIntyre (1984) defended the central role of virtues in moral theory and argued that virtues are grounded in and emerge from within social traditions. . Duty Theories Many of us feel that there are clear obligations we have as human beings, such as to care for our children, and to not commit murder. Duty theories base morality on specific, foundational principles of obligation. These theories are sometimes called deontological, from the Greek word deon, or duty, in view of the foundational nature of our duty or obligation. They are also sometimes called nonconsequentialist since these principles are obligatory, irrespective of the consequences that might follow from our actions.For example, it is wrong to not care for our children even if it results in some great benefit, such as fina ncial savings. There are four central duty theories. The first is that championed by 17th century German philosopher Samuel Pufendorf, who classified dozens of duties under three headings: duties to God, duties to oneself, and duties to others. Concerning our duties towards God, he argued that there are two kinds: a theoretical duty to know the existence and nature of God, and a practical duty to both inwardly and outwardly worship God.Concerning our duties towards oneself, these are also of two sorts: duties of the soul, which involve developing one’s skills and talents, and duties of the body, which involve not harming our bodies, as we might through gluttony or drunkenness, and not killing oneself. Concerning our duties towards others, Pufendorf divides these between absolute duties, which are universally binding on people, and conditional duties, which are the result of contracts between people. Absolute duties are of three sorts: avoid wronging others, treat people as eq uals, and romote the good of others. Conditional duties involve various types of agreements, the principal one of which is the duty is to keep one’s promises. A second duty-based approach to ethics is rights theory. Most generally, a â€Å"right† is a justified claim against another person’s behavior – such as my right to not be harmed by you (see also human rights[->18]). Rights and duties are related in such a way that the rights of one person implies the duties of another person. For example, if I have a right to payment of $10 by Smith, then Smith has a duty to pay me $10.This is called the correlativity of rights and duties. The most influential early account of rights theory is that of 17th century British philosopher John Locke[->19], who argued that the laws of nature mandate that we should not harm anyone’s life, health, liberty or possessions. For Locke, these are our natural rights, given to us by God. Following Locke, the United States Declaration of Independence authored by Thomas Jefferson recognizes three foundational rights: life, liberty, and the pursuit of happiness.Jefferson and others rights theorists maintained that we deduce other more specific rights from these, including the rights of property, movement, speech, and religious expression. There are four features traditionally associated with moral rights. First, rights are natural insofar as they are not invented or created by governments. Second, they are universal insofar as they do not change from country to country. Third, they are equal in the sense that rights are the same for all people, irrespective of gender, race, or handicap.Fourth, they are inalienable which means that I ca not hand over my rights to another person, such as by selling myself into slavery. A third duty-based theory is that by Kant, which emphasizes a single principle of duty. Influenced by Pufendorf, Kant agreed that we have moral duties to oneself and others, such as develop ing one’s talents, and keeping our promises to others. However, Kant argued that there is a more foundational principle of duty that encompasses our particular duties. It is a single, self-evident principle of reason that he calls the â€Å"categorical imperative. A categorical imperative, he argued, is fundamentally different from hypothetical imperatives that hinge on some personal desire that we have, for example, â€Å"If you want to get a good job, then you ought to go to college. † By contrast, a categorical imperative simply mandates an action, irrespective of one’s personal desires, such as â€Å"You ought to do X. † Kant gives at least four versions of the categorical imperative, but one is especially direct: Treat people as an end, and never as a means to an end. That is, we should always treat people with dignity, nd never use them as mere instruments. For Kant, we treat people as an end whenever our actions toward someone reflect the inherent value of that person. Donating to charity, for example, is morally correct since this acknowledges the inherent value of the recipient. By contrast, we treat someone as a means to an end whenever we treat that person as a tool to achieve something else. It is wrong, for example, to steal my neighbor’s car since I would be treating her as a means to my own happiness. The categorical imperative also regulates the morality of actions that affect us individually.Suicide, for example, would be wrong since I would be treating my life as a means to the alleviation of my misery. Kant believes that the morality of all actions can be determined by appealing to this single principle of duty. A fourth and more recent duty-based theory is that by British philosopher W. D. Ross, which emphasizes prima facie duties. Like his 17th and 18th century counterparts, Ross argues that our duties are â€Å"part of the fundamental nature of the universe. † However, Ross’s list of dutie s is much shorter, which he believes reflects our actual moral convictions:  ·Fidelity: the duty to keep promises Reparation: the duty to compensate others when we harm them  ·Gratitude: the duty to thank those who help us  ·Justice: the duty to recognize merit  ·Beneficence: the duty to improve the conditions of others  ·Self-improvement: the duty to improve our virtue and intelligence  ·Nonmaleficence: the duty to not injure others Ross recognizes that situations will arise when we must choose between two conflicting duties. In a classic example, suppose I borrow my neighbor’s gun and promise to return it when he asks for it. One day, in a fit of rage, my neighbor pounds on my door and asks for the gun so that he can take vengeance on someone.On the one hand, the duty of fidelity obligates me to return the gun; on the other hand, the duty of nonmaleficence obligates me to avoid injuring others and thus not return the gun. According to Ross, I will intuitively kn ow which of these duties is my actual duty, and which is my apparent or prima facie duty. In this case, my duty of nonmaleficence emerges as my actual duty and I should not return the gun. c. Consequentialist Theories It is common for us to determine our moral responsibility by weighing the consequences of our actions.According to consequentialism[->20], correct moral conduct is determined solely by a cost-benefit analysis of an action’s consequences: Consequentialism: An action is morally right if the consequences of that action are more favorable than unfavorable. Consequentialist normative principles require that we first tally both the good and bad consequences of an action. Second, we then determine whether the total good consequences outweigh the total bad consequences. If the good consequences are greater, then the action is morally proper. If the bad consequences are greater, then the action is morally improper.Consequentialist theories are sometimes called teleologic al theories, from the Greek word telos, or end, since the end result of the action is the sole determining factor of its morality. Consequentialist theories became popular in the 18th century by philosophers who wanted a quick way to morally assess an action by appealing to experience, rather than by appealing to gut intuitions or long lists of questionable duties. In fact, the most attractive feature of consequentialism is that it appeals to publicly observable consequences of actions.Most versions of consequentialism are more precisely formulated than the general principle above. In particular, competing consequentialist theories specify which consequences for affected groups of people are relevant. Three subdivisions of consequentialism emerge:  ·Ethical Egoism: an action is morally right if the consequences of that action are more favorable than unfavorable only to the agent performing the action.  ·Ethical Altruism: an action is morally right if the consequences of that act ion are more favorable than unfavorable to everyone except the agent. Utilitarianism: an action is morally right if the consequences of that action are more favorable than unfavorable to everyone. All three of these theories focus on the consequences of actions for different groups of people. But, like all normative theories, the above three theories are rivals of each other. They also yield different conclusions. Consider the following example. A woman was traveling through a developing country when she witnessed a car in front of her run off the road and roll over several times.She asked the hired driver to pull over to assist, but, to her surprise, the driver accelerated nervously past the scene. A few miles down the road the driver explained that in his country if someone assists an accident victim, then the police often hold the assisting person responsible for the accident itself. If the victim dies, then the assisting person could be held responsible for the death. The driver continued explaining that road accident victims are therefore usually left unattended and often die from exposure to the country’s harsh desert conditions.On the principle of ethical egoism[->21], the woman in this illustration would only be concerned with the consequences of her attempted assistance as she would be affected. Clearly, the decision to drive on would be the morally proper choice. On the principle of ethical altruism, she would be concerned only with the consequences of her action as others are affected, particularly the accident victim. Tallying only those consequences reveals that assisting the victim would be the morally correct choice, irrespective of the negative consequences that result for her.On the principle of utilitarianism, she must consider the consequences for both herself and the victim. The outcome here is less clear, and the woman would need to precisely calculate the overall benefit versus disbenefit of her action. i. Types of Utilitarianism J eremy Bentham[->22] presented one of the earliest fully developed systems of utilitarianism. Two features of his theory are noteworty. First, Bentham proposed that we tally the consequences of each action we perform and thereby determine on a case by case basis whether an action is morally right or wrong. This aspect of Bentham’s theory is known as act-utilitiarianism.Second, Bentham also proposed that we tally the pleasure and pain which results from our actions. For Bentham, pleasure and pain are the only consequences that matter in determining whether our conduct is moral. This aspect of Bentham’s theory is known as hedonistic utilitarianism. Critics point out limitations in both of these aspects. First, according to act-utilitarianism, it would be morally wrong to waste time on leisure activities such as watching television, since our time could be spent in ways that produced a greater social benefit, such as charity work. But prohibiting leisure activities doesnâ €™t seem reasonable.More significantly, according to act-utilitarianism, specific acts of torture or slavery would be morally permissible if the social benefit of these actions outweighed the disbenefit. A revised version of utilitarianism called rule-utilitarianism addresses these problems. According to rule-utilitarianism, a behavioral code or rule is morally right if the consequences of adopting that rule are more favorable than unfavorable to everyone. Unlike act utilitarianism, which weighs the consequences of each particular action, rule-utilitarianism offers a litmus test only for the morality of moral rules, such as â€Å"stealing is wrong. Adopting a rule against theft clearly has more favorable consequences than unfavorable consequences for everyone. The same is true for moral rules against lying or murdering. Rule-utilitarianism, then, offers a three-tiered method for judging conduct. A particular action, such as stealing my neighbor’s car, is judged wrong sin ce it violates a moral rule against theft. In turn, the rule against theft is morally binding because adopting this rule produces favorable consequences for everyone. John Stuart Mill’s version of utilitarianism is rule-oriented.Second, according to hedonistic utilitarianism, pleasurable consequences are the only factors that matter, morally speaking. This, though, seems too restrictive since it ignores other morally significant consequences that are not necessarily pleasing or painful. For example, acts which foster loyalty and friendship are valued, yet they are not always pleasing. In response to this problem, G. E. Moore [->23]proposed ideal utilitarianism, which involves tallying any consequence that we intuitively recognize as good or bad (and not simply as pleasurable or painful). Also, R. M.Hare proposed preference utilitarianism, which involves tallying any consequence that fulfills our preferences. ii. Ethical Egoism and Social Contract Theory We have seen (in Secti on 1. b. i) that Hobbes was an advocate of the methaethical theory of psychological egoism—the view that all of our actions are selfishly motivated. Upon that foundation, Hobbes developed a normative theory known as social contract theory[->24], which is a type of rule-ethical-egoism. According to Hobbes, for purely selfish reasons, the agent is better off living in a world with moral rules than one without moral rules.For without moral rules, we are subject to the whims of other people’s selfish interests. Our property, our families, and even our lives are at continual risk. Selfishness alone will therefore motivate each agent to adopt a basic set of rules which will allow for a civilized community. Not surprisingly, these rules would include prohibitions against lying, stealing and killing. However, these rules will ensure safety for each agent only if the rules are enforced. As selfish creatures, each of us would plunder our neighbors’ property once their gua rds were down.Each agent would then be at risk from his neighbor. Therefore, for selfish reasons alone, we devise a means of enforcing these rules: we create a policing agency which punishes us if we violate these rules. 3. Applied Ethics Applied ethics is the branch of ethics which consists of the analysis of specific, controversial moral issues such as abortion, animal rights, or euthanasia. In recent years applied ethical issues have been subdivided into convenient groups such as medical ethics, business ethics, environmental ethics[->25], and sexual ethics[->26].Generally speaking, two features are necessary for an issue to be considered an â€Å"applied ethical issue. † First, the issue needs to be controversial in the sense that there are significant groups of people both for and against the issue at hand. The issue of drive-by shooting, for example, is not an applied ethical issue, since everyone agrees that this practice is grossly immoral. By contrast, the issue of g un control would be an applied ethical issue since there are significant groups of people both for and against gun control.The second requirement for an issue to be an applied ethical issue is that it must be a distinctly moral issue. On any given day, the media presents us with an array of sensitive issues such as affirmative action policies, gays in the military, involuntary commitment of the mentally impaired, capitalistic versus socialistic business practices, public versus private health care systems, or energy conservation. Although all of these issues are controversial and have an important impact on society, they are not all moral issues. Some are only issues of social policy.The aim of social policy is to help make a given society run efficiently by devising conventions, such as traffic laws, tax laws, and zoning codes. Moral issues, by contrast, concern more universally obligatory practices, such as our duty to avoid lying, and are not confined to individual societies. Fre quently, issues of social policy and morality overlap, as with murder which is both socially prohibited and immoral. However, the two groups of issues are often distinct. For example, many people would argue that sexual promiscuity is mmoral, but may not feel that there should be social policies regulating sexual conduct, or laws punishing us for promiscuity. Similarly, some social policies forbid residents in certain neighborhoods from having yard sales. But, so long as the neighbors are not offended, there is nothing immoral in itself about a resident having a yard sale in one of these neighborhoods. Thus, to qualify as an applied ethical issue, the issue must be more than one of mere social policy: it must be morally relevant as well. In theory, resolving particular applied ethical issues should be easy.With the issue of abortion, for example, we would simply determine its morality by consulting our normative principle of choice, such as act-utilitarianism. If a given abortion pr oduces greater benefit than disbenefit, then, according to act-utilitarianism, it would be morally acceptable to have the abortion. Unfortunately, there are perhaps hundreds of rival normative principles from which to choose, many of which yield opposite conclusions. Thus, the stalemate in normative ethics between conflicting theories prevents us from using a single decisive procedure for determining the morality of a specific issue.The usual solution today to this stalemate is to consult several representative normative principles on a given issue and see where the weight of the evidence lies. a. Normative Principles in Applied Ethics Arriving at a short list of representative normative principles is itself a challenging task. The principles selected must not be too narrowly focused, such as a version of act-egoism that might focus only on an action’s short-term benefit. The principles must also be seen as having merit by people on both sides of an applied ethical issue.For this reason, principles that appeal to duty to God are not usually cited since this would have no impact on a nonbeliever engaged in the debate. The following principles are the ones most commonly appealed to in applied ethical discussions:  ·Personal benefit: acknowledge the extent to which an action produces beneficial consequences for the individual in question.  ·Social benefit: acknowledge the extent to which an action produces beneficial consequences for society.  ·Principle of benevolence: help those in need. Principle of paternalism: assist others in pursuing their best interests when they cannot do so themselves.  ·Principle of harm: do not harm others.  ·Principle of honesty: do not deceive others.  ·Principle of lawfulness: do not violate the law.  ·Principle of autonomy: acknowledge a person’s freedom over his/her actions or physical body.  ·Principle of justice: acknowledge a person’s right to due process, fair compensation for harm done, a nd fair distribution of benefits.  ·Rights: acknowledge a person’s rights to life, information, privacy, free expression, and safety.The above principles represent a spectrum of traditional normative principles and are derived from both consequentialist and duty-based approaches. The first two principles, personal benefit and social benefit, are consequentialist since they appeal to the consequences of an action as it affects the individual or society. The remaining principles are duty-based. The principles of benevolence, paternalism, harm, honesty, and lawfulness are based on duties we have toward others. The principles of autonomy, justice, and the various rights are based on moral rights.An example will help illustrate the function of these principles in an applied ethical discussion. In 1982, a couple from Bloomington, Indiana gave birth to a baby with severe mental and physical disabilities. Among other complications, the infant, known as Baby Doe, had its stomach dis connected from its throat and was thus unable to receive nourishment. Although this stomach deformity was correctable through surgery, the couple did not want to raise a severely disabled child and therefore chose to deny surgery, food, and water for the infant.Local courts supported the parents’ decision, and six days later Baby Doe died. Should corrective surgery have been performed for Baby Doe? Arguments in favor of corrective surgery derive from the infant’s right to life and the principle of paternalism which stipulates that we should pursue the best interests of others when they are incapable of doing so themselves. Arguments against corrective surgery derive from the personal and social disbenefit which would result from such surgery. If Baby Doe survived, its quality of life would have been poor and in any case it probably would have died at an early age.Also, from the parent’s perspective, Baby Doe’s survival would have been a significant emotio nal and financial burden. When examining both sides of the issue, the parents and the courts concluded that the arguments against surgery were stronger than the arguments for surgery. First, foregoing surgery appeared to be in the best interests of the infant, given the poor quality of life it would endure. Second, the status of Baby Doe’s right to life was not clear given the severity of the infant’s mental impairment. For, to possess moral rights, it takes more than merely having a human body: certain cognitive functions must also be present.The issue here involves what is often referred to as moral personhood, and is central to many applied ethical discussions. b. Issues in Applied Ethics As noted, there are many controversial issues discussed by ethicists today, some of which will be briefly mentioned here. Biomedical ethics focuses on a range of issues which arise in clinical settings. Health care workers are in an unusual position of continually dealing with life and death situations. It is not surprising, then, that medical ethics issues are more extreme and diverse than other areas of applied ethics.Prenatal issues arise about the morality of surrogate mothering, genetic manipulation of fetuses, the status of unused frozen embryos, and abortion. Other issues arise about patient rights and physician’s responsibilities, such as the confidentiality of the patient’s records and the physician’s responsibility to tell the truth to dying patients. The AIDS crisis has raised the specific issues of the mandatory screening of all patients for AIDS, and whether physicians can refuse to treat AIDS patients. Additional issues concern medical experimentation on humans, the morality of involuntary commitment, and the rights of the mentally disabled.Finally, end of life issues arise about the morality of suicide, the justifiability of suicide intervention, physician assisted suicide, and euthanasia. The field of business ethics exami nes moral controversies relating to the social responsibilities of capitalist business practices, the moral status of corporate entities, deceptive advertising, insider trading, basic employee rights, job discrimination, affirmative action, drug testing, and whistle blowing. Issues in environmental ethics often overlaps with business and medical issues.These include the rights of animals, the morality of animal experimentation, preserving endangered species, pollution control, management of environmental resources, whether eco-systems are entitled to direct moral consideration, and our obligation to future generations. Controversial issues of sexual morality include monogamy versus polygamy, sexual relations without love, homosexual relations, and extramarital affairs. Finally, there are issues of social morality which examine capital punishment, nuclear war, gun control, the recreational use of drugs, welfare rights, and racism. 4. References and Further Reading Anscombe,Elizabeth â€Å"Modern Moral Philosophy,† Philosophy, 1958, Vol. 33, reprinted in her Ethics, Religion and Politics (Oxford: Blackwell, 1981).  ·Aristotle, Nichomachean Ethics, in Barnes, Jonathan, ed. , The Complete Works of Aristotle (Princeton, N. J. : Princeton University Press, 1984).  ·Ayer, A. J. , Language, Truth and Logic (New York: Dover Publications, 1946).  ·Baier, Kurt, The Moral Point of View: A Rational Basis of Ethics (Cornell University Press, 1958).  ·Bentham, Jeremy, Introduction to the Principles of Morals and Legislation (1789), in The Works of Jeremy Bentham, edited by John Bowring (London: 1838-1843). Hare, R. M. , Moral Thinking, (Oxford: Clarendon Press, 1981).  ·Hare, R. M. , The Language of Morals (Oxford: Oxford University Press, 1952).  ·Hobbes, Thomas, Leviathan, ed. , E. Curley, (Chicago, IL: Hackett Publishing Company, 1994).  ·Hume, David, A Treatise of Human Nature (1739-1740), eds. David Fate Norton, Mary J. Norton (Oxford; New York: Oxf ord University Press, 2000).  ·Kant, Immanuel, Grounding for the Metaphysics of Morals, tr, James W. Ellington (Indianapolis: Hackett Publishing Company, 1985).  ·Locke, John, Two Treatises, ed. Peter Laslett (Cambridge: Cambridge University Press, 1963).  ·MacIntyre, Alasdair, After Virtue, second edition, (Notre Dame: Notre Dame University Press, 1984).  ·Mackie, John L. , Ethics: Inventing Right and Wrong, (New York: Penguin Books, 1977).  ·Mill, John Stuart, â€Å"Utilitarianism,† in Collected Works of John Stuart Mill, ed. , J. M. Robson (London: Routledge and Toronto, Ont. : University of Toronto Press, 1991).  ·Moore, G. E. , Principia Ethica, (Cambridge: Cambridge University Press, 1903).  ·Noddings, Nel, â€Å"Ethics from the Stand Point Of Women,† in Deborah L.Rhode, ed. , Theoretical Perspectives on Sexual Difference (New Haven, CT: Yale University Press, 1990).  ·Ockham, William of, Fourth Book of the Sentences, tr. Lucan Freppert, The Basis of Morality According to William Ockham (Chicago: Franciscan Herald Press, 1988).  ·Plato, Republic, 6:510-511, in Cooper, John M. , ed. , Plato: Complete Works (Indianapolis: Hackett Publishing Company, 1997).  ·Samuel Pufendorf, De Jure Naturae et Gentium (1762), tr. Of the Law of Nature and Nations  ·Samuel Pufendorf, De officio hominis et civis juxta legem naturalem (1673), tr. The Whole Duty of Man according to the Law of Nature (London, 1691).  ·Sextus Empiricus, Outlines of Pyrrhonism, trs. J. Annas and J. Barnes, Outlines of Scepticism (Cambridge: Cambridge University Press, 1994).  ·Stevenson, Charles L. , The Ethics of Language, (New Haven: Yale University Press, 1944).  ·Sumner, William Graham, Folkways (Boston: Guinn, 1906). Author Information James Fieser Email: [email  protected] edu[->27] University of Tennessee at Martin Last updated: May 10, 2009 | Originally published: June 29, 2003 [->0] – .. /mor-epis [->1] – .. /objectiv [->2] â€⠀œ .. /time [->3] – .. plato [->4] – .. /divine-c [->5] – .. /god-west [->6] – .. /ockham [->7] – .. /relativi [->8] – .. /praise [->9] – .. /hobmoral [->10] – .. /psychego/ [->11] – .. /butler [->12] – .. /humemora [->13] – .. /non-cogn [->14] – .. /kantmeta [->15] – .. /virtue [->16] – .. /moral-ch [->17] – .. /aris-eth [->18] – .. /hum-rts [->19] – .. /locke [->20] – .. /conseque [->21] – .. /egoism [->22] – .. /bentham [->23] – .. /moore [->24] – .. /soc-cont [->25] – .. /envi-eth [->26] – .. /sexualit [->27] – mailto:[email  protected] edu

Business law case study Essay

This essay will discuss the Case study by firstly identifying four elements of contract, then justifying duties of Mr. Martin with applying the principles of pre-existing contractual duties. Finally a discussion about part payment of debt and promissory estoppel will be explained. Likewise, this essay will evaluate the knowledge of common law and agency relationship. QUESTION 1 a) Four essential elements of a contract should be Offer, Acceptance, Intention to create legal relations and Consideration. Firstly, offer, according to Adams(2012), is a full and clear statement of the terms†(p79) send to a party(the offeree) by another party(the offeror). Otherwise there could be a misunderstanding of an invitation to treat or negotiation which are similar statements. If an offer intends to be legally binding, acceptance, by which the offerees can show their agreement of all the terms of the offer, is needed. Acceptance needs to be valid and informing the offeror, while the terms should as same as the previous ones. Another element, i.e. consideration, aims to make sure the promise made is of value. As defined by Jones (2011), the consideration needs to give benefits to the one, who is suffering a loss at the same time. Last but not least, while making an agreement to be legally enforceable, intention to create legal relations is important. While judging whether it is a binding contract or not, the situation to make this contract needs to be considered, in other words, according to Adams(2012), contract made in a domestic or social environment will not be legally bound. Otherwise, if parties are willing to do a commercial agreement, it will be regard as legally bound(Jones, 2011). b) Mr. Martin need to pay the  £750 due to two reasons, based on three cases existed as judicial precedents, which are Stilk v Myrick(1809), Hartley v Ponsonby(1857) and Williams v Roffey bros(1990)One perspective is that there is an additional value within the new contract, though Mr. Martin and Bob the builder were being under a pre-existing contract. Hold that the old contract is not over, due to the other aspect of reason, Mr. martin needs to pay the extra money in order to avoid the loss. These afore-mentioned two points will be justified by cases. Stilk v Myrick(1809) indicates that a  captain promised the seamen extra money if they did successfully return back home. The court finally hold that the captain is not duty to pay the extra money because the old contract is existed as there is not of additional value. While Harley v Ponsonby(1857) was held that the captain needs to pay the extra money, though the situation is similar, because the court consider there is extra value added to the new contract, whilst the old contract is discharged. There are some similarities among these two cases and Mr. Martin’ s case. Mr. Martin also have an existed contract as both parties are agreed to terms of the contract, but comparing to Stilk’s case, Bob the builder suggest a sub-contract with consider an additional value, which is the value of Martin’s seafood. Meantime, because of the bad weather and sick crews, Marin need to pay extra money to ensure this additional value is secured, however, this does not means the old contract is over because the contract can be fulfilled though it may probably be expiry, as Martin has to pay extra  £750 in spite of the payment of the previous contract. On the other hand, in Williams v Rpffey bros, the claimant consider the loss of defendant if the task is not finished on time, so the defendant do have to pay the claimant the extra money as promised. In this case, Bob the builder consider the benefit of Martin so that they suggest the sub-contractor. As Mr. Marin accepted Bob’s counter offer and Bob help him avoid the loss of an amount of seafood. According to the precedent of Williams’ case, since new value to considered, Mr. Martin should pay the extra  £750. To be concluded, by referring to pre-existing duties, Mr. Martin is obliged to pay the extra  £750. c) Mr. Martin needs to pay the full  £750, as he violates the rule of part payment of debts. When consider the part payment of debt, it is necessary to concern the rule in Pinnel’s Case(1602), by which illustrated that part payment is not a sufficient consideration. Because debtors obtains a benefit with giving nothing of value to the creditors. In Marin’s case, Bob agreed to accept a lower payment( £350) in full settlement despite of any excuse Mr. Marin has used. Obviously, Mr. Martin got a benefit of  £400, whereas Bob gained nothing. Therefore, Mr. Marin provided no consideration in this case, because being sympathizing Martin’s bankrupt cannot gain more value for Bob. Since two parties failed to achieve benefits of two sides, the promise of  Bob is not binding. As a result, Martin has to pay the full  £750 as a legal duty. Apart from that, with regard of the classical High Trees House Case(1947), the principle of promissory estoppel by held that the claimants can acquire the arrears after the end of the war because they have the capacity of claiming the recover the previous price before the war started. However, they are prevented to take back the amount of arrears failed to pay because of their previous promise. In High Tress House Case, the promise was make on a real situation where two parties would consider their benefits therefore achieve benefits of both sides. Specifically, the defendants get the right of lease whilst the claimants obtained a number of profits. While in Martin’s case, no matter whether Mr. Martin have difficulties in his financial situation or not, there is still no consideration for Bob the builder, although Mr. Martin do have a benefit of saving  £400. Since there is no consideration exist, Bob is not obliged to obey the rule of promissory estoppel. To be summarised, by discussing the part payment of debt and promissory estoppel, it is responsible for Mr. Martin to pay the full  £750. As Promissory estoppel is on the doctrine of equality. QUESTION 2 According to PPP(n.d.), the common law is the law comprises the custom and judicial precedents of the courts. First feature of common law is that it is not codified, making it is not coming from the comprehensive legislation which is created through Parliament. Apart from EU enforceable law, common law depends on the distributed courts, in where legislative decisions are made. In other words, common law is the certain law made by judges. The decisions have been made in similar cases would become precedents, which mainly compose the common law. These precedents will be collected and recorded as historical documents or files over time. When coming up a new case, these precedents would be applied in the decision, which means precedents make future decision legally bound. Hierarchy has to be referred to when talking about the precedent, whereas not every precedent will be used in judging a new case. The precedent made in a higher court can be applied in a lower court, otherwise it will not be applicable. For example, a judicial decision, i.e. precedent, already made in court of appeal should be applicable in high court or county court, but a decision made in county  court should not obliged to follow for high court. On the other hand, the courts can overturn the decisions of those in same level. Last but not least, the common law make contract more freedom, which means there are few regulations to restrict contracts. Basically, everything could be acceptable even if there is extremely forbidden by law(Adams, 2012 and Jones, 2011). QUESTION 3 According to Adams(2012) and Jones(2011), the relationships between agency and principal are fiduciary ones. Basically, agents do not have legal right to payment unless the principal authorise the right. Generally payment must not be due until the agent have fulfilled the expected result of principal, otherwise, payment can not be used among any certain process on the relationship. However, agent can be regularly paid when agreement express willingness of both sides. Another right of agent is to claim indemnity if there is any expenses incurred when agent conduct the authority, no matter the agent is gratuitous or not. On the other hand, agents do have duty to possess reasonable care and skill, moreover, an agent with professional or trade skill is expected to preserve the skills as conducting a trade or profession. Then, a contractual agent must carry out the agreed tasks and the whole process of achieving the result should follow the principal’s orders. Therefore, an agent needs to perform his duties himself. The performance of the duties cannot be delegated to any third party. Likewise, the agent is required to be accountable for any profits arising from the performance of the duties and to record the benefits of exercises of authority. Besides, an agent has duty to avoid the possibility of being conflict of interest without principal’s permit, though agent must not sell his own property or shares to principal. Last but not least, an agent not only cannot take any form of bribe, but also cannot make secret profit, whereby the principal can dismiss the agent and make the contract voidable for fraud. In conclusion, case study has been discussed by applying the related law knowledge in terms of consideration of contract particularly. Therefore, basic explanation of common law and, duties and rights within agency relationship are demonstrated. Bibliography Adams, A (2012), Law for business students(7th ed), London: Pearson Education Limited. Public private partnership(n.d.), Key features of common law or civil law systems, Available at: http://ppp.worldbank.org/public-private-partnership/legislation-regulation/framework-assessment/legal-systems/common-vs-civil-law. (Assessed 22 February 2014) Jones, L (2011), Introduction to Business Law, New York: Oxford University Press. Central London Property Trust v High Trees House (1947) KB 130, 44, 53, 110, 119, 595 Hartley v Ponsonby(1875) 7 EL BL 872, 106 Pinnel’s Case (1602) 5 Co Rep 117, 108, 109, 117, 595 Stilk v Myrick (1809) 2 Camp 317, 106, 107, 589 Williams v Roffey Bros (1990) 1 ALL ER 512 CA, 107-109, 118, 119

##c Effects Of Feoptoxic Effects Of Maternal Ethanol ( E )...

Fetotoxic effects of maternal ethanol (E) intake are well documented in animals and humans. Central among the responses to E exposure are developmental deficits affecting multiple brain regions, including the cerebellum, hippocampus, olfactory bulbs, and cerebral cortex [1-4]. In vivo, moderate, clinically relevant E can generate enhanced apoptotic loss of neurons in the developing brain [4-11]. E is a prooxidant and fetal cells are highly sensitive to E/ oxidative stress (OS) [5, 12-14]. Thus, redox imbalance is a mechanism underlying E-induced neuron apoptosis in developing brain [5, 12-14]. E produces an enhanced apoptotic death in a subpopulation of cells with the lowest GSH content and normalizing this redox imbalance by stabilizing†¦show more content†¦However, during intense stress challenge, dangerous level of ROS accumulates shifting the redox balance that cannot be reversible leading to detrimental effect and cause organismal damage (B). A/the central regulator of GSH homeostasis, hence redox balance mitigation of neuron apoptotic death [5], is the master transcription factor, nuclear factor E2-related factor 2 (Nrf2). Nrf2 regulated genes include glutamate-cysteine ligase (GCL) (rate limiting enzyme in GSH synthesis), glutathione reductase (generation of reduced/active GSH), and multiple components of the gamma glutamyl cycle by which the GSH synthesis substrate, Cys is supplied to neurons in addition to dietary source(s) [20, 25]. Previous study in our laboratory addressed Nrf2/ARE (Antioxidant Response Element)-mediated neuroprotection which should prevent neuron death by maintaining GSH homeostasis [7]. E does up-regulate Nrf2 and the knockout of Nrf2 illustrated that this increase in Nrf2 confers a certain degree of neuroprotection [7]. However, somehow E prevents Nrf2 from providing complete protection and a population of fetal neurons still succumbs unless we artificially increase Nrf2 beyond its innate capaci ty [7]. A potential explanation for this incomplete protection resides in kinetics of the GSH synthesis path. GSH, a tripeptide is synthesized in a two-step enzymatic reaction [26, 27] with GCL ultimately regulated by availability of Cys