The Role & Impact of Treatment for Individuals with Substance Use Research Paper

The Role & Impact of Treatment for Individuals with Substance Use Disorders - Research Paper Example rious activities including research and trends with the purpose of significantly improving â€Å"prevention and treatment and to inform policy as it relates to drug abuse and addiction† (National Institute on Drug Abuse, n.d.). The â€Å"Results from the 2010 National Survey on Drug Use and Health† for instance revealed that â€Å"in 2010, 4.1 million persons aged 12 or older (1.6 percent of the population) received treatment for a problem related to the use of alcohol or illicit drugs† (Substance Abuse and Mental Health Services Administration (SAMHSA): Past Year Treatment, 2011, par. 3). In this regard, the current research aims to proffer pertinent issues relative to the role and impact of treatment on individuals with substance use disorders (SUDs), particularly with cocaine, heroin and prescription drugs, or those classified under illicit drugs. The discourse would initially provide the definition for SUDs, prior to delving into the role and impact of treatm ent, as required. â€Å"Substance abuse is defined as a maladaptive pattern of substance use leading to clinically significant impairment or distress as manifested by one (or more) of the following, occurring within a 12-month period: Recurrent substance use resulting in a failure to fulfill major role obligations at work, school, or home (such as repeated absences or poor work performance related to substance use; substance-related absences, suspensions, or expulsions from school; or neglect of children or household). Continued substance use despite having persistent or recurrent social or interpersonal problems caused or exacerbated by the effects of the substance (for example, arguments with spouse about consequences of intoxication and physical fights)† (American Psychiatric Association, 1994, p. 181). Treatment of SUDs would therefore depend on various factors: the type of substance or drugs used, the length of time these substances or drugs have been continuously used, the state or mental condition of

Automobile - Fuels Essay Example for Free

Automobile Fuels Essay General Motors has been at the center of one of the nation’s largest controversies over clean emissions-cars. In 1996 the company introduced the EV-1 electric car in California and Arizona. Hundreds of the electric cars were soon on the road. Then they all disappeared. The mystery behind their disappearance is the subject of the documentary Who Killed the Electric Car? Electric vehicles had many advantages over their competitors in the early 1900s. They did not have the vibration, smell, and noise associated with gasoline cars. Changing gears on gasoline cars was the most difficult part of driving, while electric vehicles did not require gear changes. Even though the cars seemed to be the next big thing, they ended up being not so successful. There have been many allegations to whom or what happen to kill the electric car. In 2000, tragedy struck as all EV-1’s were recalled. In 2003, California’s zero emissions vehicle mandate was killed and General Motors officially closed down the entire EV-1 project despite the long waiting lists and positive feedback from EV-1 drivers. This terrible crime did not go unnoticed by the public. Consumers were outraged by the recalling of EV-1’s. They wanted to know why someone would get rid of a car that would help out the environment and would make things better for the future. Someone is to blame for killing the electric car, but who? Was it the big oil companies and their fear of losing money? Could it be the battery technology in the EV-1’s that was faulty?

Investigation of Fracture Energy GF

Investigation of Fracture Energy GF ABSTRACT Concretes inherent brittleness, low tensile strength and premature micro-cracking phenomena can be improved, in the bulk material, by embedment of carbon nanotubes (CNTs), the 1-D allotrope of carbon which exhibit a remarkable combination of mechanical and transport properties. The present research aims in investigating the fracture energy, Gf, of modified cement mortar with Multi Wall Carbon Nanotubes (MWCNTs) under 3-point bending test with acoustic emission (AE). According to Rilem recommendation, it is reported that using the fracture toughness of mortars reinforced with variable loadings of multi-walled carbon nanotubes it can be determined the fracture energy, Gf. Moreover, it is widely known that fracture energy depends on both geometry and size of the test specimen. The results of load, CMOD, AE-activity and AE-energy are analyzed. 1. Introduction As the most widely used structural materials, concrete has been developed to meet constantly renewed requirements raised by construction of more and more structures [1]. Great research efforts are continuously invested towards improving its inherent brittleness, low tensile strength and premature micro-cracking phenomena by the introduction of third phases throughout its volume. While endowment of reinforcement and ductility are conventionally achieved through embedment of steel rods, additional reinforcement of the continuous phase can be achieved through the introduction of other micro- and nano-scale media [2-5]. However, an obvious shortage of concrete with largely enhanced strength grade is brittleness, which is of great concern related to the structural safety. Recent studies have focused on improving the properties of concrete with the addition of nanomaterials such as carbon nanotubes (CNTs) or carbon nanofibers (CNFs). In addition, fibers control the crack patterns and determine failure modes of concrete members [6-9]. There are many fibers utilized in cement and concrete materials. The most common fibers are glass, carbon, aramid, polypropylene, and basalt fibers. The revolutionary one-dimensional allotrope of carbon with Youngs moduli approaching 1.4 TPa, seven times higher than of high-strength steel and tensile strengths above 100GPa, fifty times higher than the same reference material. At this moment the nanocomposite materials are considered the next generation materials for electronics, aeronautical, civil engineering and other applications [4, 10-13]. Carbon nanotubes have minimum diameters of 0.4nm and are classified as single- or multi-walled (SWCNTs and MWCNTs, respectively) and they produced by chemical vapor deposition (CVD) and its variants (low pressure, thermal, catalytic and others). The most popular and affordable choice due to low commercial price are the ÃŽÅ“WCNTs but they have slightly inferior performance than SWCNTS which are lot expensive. Carbon nanofibers (CNFs), a similar nanostructured material comprised of cylindrically-shaped arrangements of stacked graphene plates or cones, have also been suggested as nano-re inforcements for concrete [14]. At nanocomposite materials a very important factor which will enable efficient load transfer from the cement matrix to the tubes, is the achievement of homogeneous dispersion of tubes within the continuous phase. The dispersion of MWCNTs, ideally without significant reduction in their high initial length and aspect ratio, usually achieved through the use of surfactants and sonication processes. This part attracts rigorous scientific efforts because CNTs tend to agglomerate together due to their high surface area and the strong Van der Waals forces acting between them. The agglomerates are responsible not only for stress concentration within the cement matrix which leads to strength degradation during service life, but also to premature crack initiation and propagation [15, 16]. On the other hand, there are a lot of studies which have referenced that surfactants create side-effects in cement matrix. Makar et al. reported strong early-age bonds between cement paste and CNTs[17]. Yazdanbakhsh [14] reported incompatibility issues, during the hydration phase, between cement base and the surfactants used for improving CNT dispersion. In addition the study observed reduction in aspect ratio length/diameter of MWCNT during exposure of the tubes to the high sonication energies required for disentanglement. It was suggested that the favorable dispersion characteristics found in aqueous environment does not guarantee a similarly favorable dispersion within the cement matrix. Enhancement of cements flexural toughness by CNTs hasnt been investigated largely by researchers and so there isnt a wide variety of reports. To the authors knowledge only one reference, Stynoski et al. [18] studied the fracture properties of Portland cement mortars containing carbon nanotubes, carbon fibers and silica fume using notched three-point bending test. They observed that using silica fume and carbon nanotubes together there was improvement in toughness about 35% and increment about 56% on critical crack tip opening displacement (CTODc) at 28 days. In addition using only carbon nanotubes provided. On the other hand, using only carbon nanotubes serves to increase in fracture toughness of about 5-10% at 7 and 28 days of age. In addition, the effect of carbon nanotubes has as result to increment the CTODc about 20% improvement at 28 days. But there are several of investigations which study the fracture properties of micro-fiber reinforced mortar with various additives. For exa mple, Moukwa et al. [19] studied the effect of alumino-silicate clays on the critical stress intensity factor and CTODc. They found that the use of silica fume and alumino-silicate clays increased the values of KIC, CTODC and the compressive strength of cementitious materials. In addition alumino-silicate clays are incorporated as substitutes for a fraction of the cement, the total porosity of hardened mixtures increases compared to that of hardened cement paste with no clay addition. Sarker et al. [20] studied the fracture behavior of geopolymer concrete (GPC) as compared to OPC concrete of similar compressive strength and containing the same size and type of aggregates. They found that the failure modes of the heat cured GPC specimens were generally more brittle than those of the OPC concrete specimens. Fracture energy of geopolymer concrete was similar to that of OPC concrete and fracture energy increased with compressive strength in both types of concrete. The critical stress in tensity factor of the GPC specimens was higher than that of the OPC concrete specimens for the same compressive strength and the difference in the fracture behaviors of GPC and OPC concrete is because of the higher bond and tensile strengths of GPC. Das et al. [21] replaced ordinary Portland cement (OPC) by limestone or a combination of limestone and fly ash/metakaolin and they observed that the new phases inside the mortar matrix can lead to enhanced fracture mechanics properties and ductility. Nikbin et al. [22] studied the fracture characteristics, such as fracture energy and Kic, of self-compacting concrete using notched three-point bend specimens for specimens with different coarse aggregate volume percent. 2. Materials and Test Methods 2.1. Materials, specimens and testing The Multi Walled Carbon Nanotubes (MWCNTs) that used in the present work were synthesized via catalytic chemical vapor deposition and were commercially available by Shenzhen Nanotech Port Co. Ltd. (Shenzhen, China). Their nominal purity was higher than 97% and their amorphous carbon content was less than 3%. The nominal tube diameter ranged from 20 to 40 nm while their length ranged from 5 to 15 ÃŽÂ ¼m. In table 1 is shown the properties of multi-wall carbon nanotubes. Viscocrete Ultra 300 (Sika AG, Baar, Switzerland), a water-based superplasticizer comprised of polycarboxylate polymers was used as dispersion assistive agent; it was selected based on its efficiency in inhibiting air entrapment inside the specimens as well as because of its excellent resistance to mechanical and chemical attack. Table 1: Properties of multi-wall carbon nanotubes Parameters Values Type multi-wall CNTs Length 5-15 ÃŽÂ ¼m Main range of diameter 20-40 nm Production method: catalyzed CVD Purity à ¢Ã¢â‚¬ °Ã‚ ¥ 95% Ash à ¢Ã¢â‚¬ °Ã‚ ¤ 0.2 wt% Special surface area 40-300 m3/g Amorphous carbon à ¢Ã¢â‚¬ °Ã‚ ¤ 3% For the production of nanocomposite mortar with tube loadings variable within 0.2, 0.4, 0.5, 0.6 and 0.8 wt% of cement, the following experimental protocol was adopted. Initially, superplasticer with MWCNTs at a ratio of 1.5/1 added in regular tap water and then follow magnetic stirring for 2 min. The resultant suspensions were subsequently ultrasonicated for 90 min at room temperature by aid of a Hielscher UP400S device (Hielscher Ultrasonics GmbH, Teltow, Germany) equipped with a cylindrical 22 mm diameter sonotrode delivering a power throughput of 4500 J/min at a frequency of 24 kHz. The specific combination of ultrasonication parameters was established as optimal for achievement of suspension homogeneity without tube aspect ratio impairment [15]. The ultrasonicated suspensions were transferred, along with ordinary Portland cement type I 42.5N and natural sand into the bucket of a rotary mixer where it was mixed for a total of 4 minutes, in low and high speeds sequentially, as per standard test method BS EN 196-1. Immediately after mixing, the fresh mortar was poured into metallic oiled formworks, volumes of 160x40x40 mm3, where it was left for 24 hours before demolding and subsequent placement into a 100% humidity room for duration of 28 days. A total 50 specimens were prepared, divided into two sets of five specimens at each CNT formulation, 0.2, 0.4, 0.6 and 0.8 wt% of cement. In one set, suspensions were further processed in a vacuum environment for removal of entrapped air before they were mixed with the cement and sand by aid of a rotary mixer. Additional mixtures without nanotubes were also prepared for reference purposes. The above procedure is shown schematically in fig. 1. After 28 days maturation were created a notch in specimens with cut-wheel with depth 20mm. Figure 1: Schematic representation of the nano-modifield mortars manufacturing process [5] In addition fig. 2 depicts the as-processed state of MWCNT-reinforced concrete specimens with varying tube loadings. The bottom row depicts reference specimens, whereas the top and middle rows show specimens with tube loadings of 0.6 and 0.2 wt% of cement, respectively, wherein porosity appears to increase with nano-reinforcement concentration. Figure 2: Various amounts of carbon nanotube loadings inside cement matrix: 0.6 wt% of cement (top row), 0.2 wt% of cement (middle row) and plain cement (bottom row) 2.2 Acoustic Emission Monitoring Large concrete structures like buildings, storage tanks, bridges, dams, offshore structures, flyovers require reliable non-destructive testing methods for assessing structure integrity. Acoustic emission is a widely used technique for monitoring concrete structures, and is based on the phenomenon of the rapid release of energy from different localized sources inside a material generating elastic waves [23]. Such stress waves propagate through the solid due to energy released during the deformation process and the amount of acoustic energy released depends on the size, the speed of the local deformation process and the material. AE can detect lesions such as crack growth, fracture growth, monitoring deformations, corrosion etc. in a wide range of materials. The transducers are usually piezoelectric and transform the energy of the transient elastic wave to an electric waveform which is digitized and stored. The AE sensors record the accumulated activity which is indicative of the sever ity of cracking. Certain indices based on the magnitude or the number of the AE signals has been employed successfully in the health monitoring of heterogeneous structural materials like concrete and composites. In addition, when multiple sensors are applied, apart from the number of AE hits, it is possible to be found the source of events because of the time delay between the acquisitions of the corresponding signals at different sensors. This allows the estimation of which part of the material needs repair, which is of paramount importance for large-scale structures. Also via AE the materials mode of fracture can be studied and characterized [24-26]. However, there are other important aspects of the AE testing, which are based on the qualitative parameters of the received signals. It has been seen that the shape of the waveform is indicative of the fracture type, something very important for the classification of cracks in different materials. Shear cracks follow tensile cracks as damage is being accumulated within the material. Therefore, the characterization of the cracking mode can act as a warning against final failure. It has been shown that tensile events are linked to higher frequency content and higher RA value, fig. 3, than shear [27-30]. This is mainly due to the larger part of energy transmitted in the form of shear waves, which are slower; therefore, the maximum peak of the waveform delays considerably compared to the onset of the initial longitudinal arrivals, This kind of classification has proven useful in laboratory conditions concerning corrosion cracking in concrete, fracture of cross-ply laminates, as well as d iscrimination between tensile matrix cracking and fiber pull-out during bending of steel-fiber reinforced concrete [31, 32]. In fig. 3 and in fig. 4 is given a typical AE signal and a typical AE signal due to different types of fracture respectively. Figure 3: Typical AE signal and parameters Figure 4: Typical AE signals due to different types of fracture 2.3 Mechanical performance Determination of the fracture toughness by means of three-point bend tests on notched beams In the present study for calculation of the critical fracture toughness of cementitious materials used the Hilleborgs [33] crack model of concrete which is similar with Dugdale-Barenblatt crack model of metals. For cementitious composite materials, such as mortar or concrete, the fracture toughness is determined using linear elastic fracture mechanics (LEFM) considerations. The P-CMOD response is obtained from notched beams, subjected to the center-point loading conà ¯Ã‚ ¬Ã‚ guration shown in fig. 5. The tests are performed under CMOD control, where this parameter is measured using a clip gage mounted on knife-edges. The thickness of the knife-edges, d, is taken into account in the calculations. Figure 5: Three-point bend test configuration for notched beam specimen For this geometry, the stress intensity factor (KI) is given by where P is the applied load, a is the crack length and ÃŽÂ ± = a / W is the relative crack length (with S=3W and ÃŽÂ ±o=ao/W=0,25). The geometry dependent function, f(ÃŽÂ ±) is determined using two-dimensional plane stress analysis and is given by Where when when Also, in a similar way, where the dimensionless geometry-dependent function, g(ÃŽÂ ±), is given by Where when when As it is evident from fig. 1, the CMOD is not measured exactly at the notch mouth but at a distance d, which must be taken into account for determining the real value of CMOD from that measured in the test (denoted as CMODMesured). Therefore, The conversion factor kd can be determined, for 1 mm d 6 mm, from The coefficients used to compute kd for the CMOD correction are given in table 2 for different knife-edge thicknesses. Table 2: Coefficients used to compute kd for the CMOD correction d(mm) h1 h2 h3 h4 1 0.0050 275.1 275.9 0.0399 2 0.1508 162.5 163.6 0.0118 3 0.1037 104.1 105.1 0.01631 4 0.0777 76.2 77.2 0.0137 5 0.0623 60.2 61.1 0.0117 6 0.0521 49.7 50.6 0.0106 For large ÃŽÂ ± (> 0,4) the correction is insignificant, hence for specimens with relative notch lengths in the order of 0,4, no correction needs to be applied. Moreover, for thin knife-edges (d Determination of the fracture energy by means of three-point bend tests on notched beams The fracture energy is defined as the amount of energy necessary to create one unit area of a crack. The area of a crack is defined as the projected area on a plane parallel to the main crack direction. This test method is not recommended for fiber-reinforced concrete. The fracture energy is determined by the equation, [N/m (J/] Where, Wo (Nm), is the area under the load-deformation curve shown in fig. 6 (kg) ; m1 = weight of the beam between the supports, calculated as the beam weight multiplied by S/L (fig. 1). The length L of the beam as well as the span S during the test must be measured with an accuracy of at least 1 mm; m2 = weigth of the part of the loading device touching the beam which is not attached to the testing machine, but follows the beam until fracture; g = acceleration due to gravity (9,81 m/s2); ÃŽÂ ´o = deformation of the beam at fracture (m), as shown in fig. 2; Alig = area of the ligament (m2), defined as the projection of the fracture zone on a plane perpendicular to the beam axis. Figure 6: Load-deformation (CMOD) curve Test procedure for fracture energy measurement The test is performed with an approximately constant rate of deformation, which is chosen so that the maximum load is reached within about 30-60 seconds after the start of the test. The deformation of the center of the beam and the corresponding load are registered until the beam is completely separated into two halves. In case the deformation is not measured directly on the specimen it is recommended that before measuring the load-deformation curve the load is cycled 3 times between 5% and 25% of the expected maximum load. The load should be measured with an accuracy of at least 2% of the maximum value in the test. The deformation must be measured with an accuracy of at least 0.01 mm. Finally, the Crack Mouth Opening Displacement (CMOD) will be monitored during the test performed with controlled load in a closed-loop testing machine. The load will be applied at a rate between 2 and 3 N/s. A plot of CMOD versus applied load will be produced. Mechanical characterization under three po int bending testing was performed on an Instron 5967 testing frame (Instron, Norwood, MA, USA) equipped with a 30kN loadcell. For the accurate recording of displacement C.M.O.D were used a Crack Opening Displacement (COD) Gauge extensometer with gauge length 10mm by Instron company. 3. Results and Discussion The effect of CNT presence and concentration to the flexural and compressive strength has investigated in previous study. The researchers were observed that subjection of the suspension to the vacuum-assisted air removal procedure significantly enhanced the materials flexural strength, compared to non-vacuumed suspensions. The maximum improvement in flexural strength, compared to the control specimens for vacuumed suspensions, appeared at 0.4 wt% MWCNT loading and was approximately 17% improvement at 0.2, 0.6 and 0.8 wt% loadings were 12, 10 and 9% respectively [4]. In the present study, the fracture energy of vacuum and non-vacuume nanocomposite mortar, Gf, as the way the fracture energy effects on the acoustic emission energy are investigated. In respect to the flexural strength the researcher observed that the specimens had the similar behavior as shown in table 3. The flexural strength calculated by using the following equation, where L, B, W and a0 are specimens dimensions prese nting in fig. 5. à Ã†â€™ = Table 3: Comparison results of Flexural strength between specimens with and without notch. Flexural Strength[MPa] [4] Flexural Strength with notch[Mpa] CNT loading, wt% of cement Non-VacuumedSuspensions VacuumedSuspensions Non-VacuumedSuspensions VacuumedSuspensions 0 (plain) 5.36  ± 0.38 5.43  ± 0.23 5.72  ± 0.21 5.64  ± 0.25 0.2 4.15  ± 0.28 6.09  ± 0.43 4.73  ± 0.22 5.98  ± 0.11 0.4 4.61  ± 0.48 6.34  ± 0.67 5.00  ± 0.34 6.74  ± 0.13 0.6 4.97  ± 0.36 6.01  ± 0.66 4.83  ± 0.33 6.12  ± 0.31 0.8 4.78  ± 0.21 5.92  ± 0.5 4.87  ± 0.28 6.35  ± 0.39 It is widely known that CNTs increase the mechanical properties. Table 4 shows the results of effect of CNTs to the fracture energy, Gf, for vacuumed and non-vacuumed specimens. It is clearly that CNTs increase the fracture energy and the maximum value appears in the rate of 0.4% wt. cement CNTs. Above the rate of 0.4% there were reduction in the fracture energy however the values of Gf continues are higher than control specimens. In addition, all non-vacuumed specimens showed slightly elevated values than the control specimens but lower for vacuumed specimens because of porosity which is created because of CNTs. Table 4: Comparison results of Fracture energy between Vacuumed and Non-Vacuumed suspensions Fracture Energy [N/m (J/m2)] CNT loading, wt% of cement Non-VacuumedSuspensions VacuumedSuspensions 0 (plain) 1.1655  ± 0.063 1.1281  ± 0.060 0.2 1.1681  ± 0.122 2.0338  ± 0.086 0.4 1.6910  ± 0.115 6.5373  ± 0.369 0.6 2.1460  ± 0.050 2.9987  ± 0.383 0.8 1.8185  ± 0.200 2.4623  ± 0.165 Except for plain specimens which had similar fracture energy, the fracture energy of the specimens which had been in vacuum was increased. Gf of the nanocomposite with 0.2% and 0.4% wt. cement CNTs was found to be higher at about 80% and 479% respectively related to control specimens while for 0.6% and 0.8% wt. cement CNTs was found an increment at about 166% and 118% respectively. On the other hand, non-vacuumed nanocomposite specimens with 0.2% wt. cement CNTs were found it that had limited growth about only 0.2%. Greater increase of approximately 45%, 84% and 56% showed the nanocomposites specimens with 0.4 %, 0.6% and 0.4% wt. cement CNTs respectively. Comparing the two types of mixtures, vacuumed and non-vacuumed, the results showed that the fracture energy increment for all rates for vacuumed specimens. Specifically, for the rates 0.2% and 0.4% wt. cement CNTs the increments were about 74% and 287% respectively while for 0.6% and 0.8% wt. the increments were only 40% and 36% re spectively. The entire above are shown in fig. 7. Finally, fig. 8 shows a typical load-CMOD graph for all rates, 0% up to 0.8% wt. cement CNTs, of vacuumed nanocomposite specimens and non-vacuumed specimens. Figure 7: Diagram of Fracture Energy, Gf, results Figure 8: Typical load-CMOD curve for all rates of nanocomposite specimens for a) vacuumed and b) non-vacuumed are presented. For Acoustic Emission (AE) monitoring in real time under three point bending tests of CNT-reinforced concrete specimens two R15a AE sensors were used, with broadband response ranging from 50 to 400 kHz and a maximum sensitivity at 150 kHz, attached on the lower section of the specimen. The R15a is a narrow band resonant sensor with a high sensitiv

Earnest Hemingways Farewell To Arms English Literature Essay

Earnest Hemingways Farewell To Arms English Literature Essay Thesis: Farewells to arms by Earnest Hemingway concentrates on negative impacts of war, overall loss and how it affects people by making them lose the capacity for moral judgment and rational thought. I. Introduction II. Brief synopsis of A Farewell to Arms III. Factors that motivated Ernest Hemingway to write the novel IV. Symbolism in the novel The rain Catherines hair V. The theme of realism The harsh reality of war Love and Pain Escape from reality VI. Negative impact of the war V. Conclusion A Farewell to Arms A Farewell to Arms is an autobiographical novel written between 1899 and1961 by Ernest Hemingway and first published in 1929.The novel was written through a view point of Lieutenant Frederic Henry, an American who serves as an ambulance driver in the Italian army during the First Worlds War. The novel is about a catastrophic romance between Catherine Barkley, a British nurse and Frederick Henry, an American soldier. A Farewell to Arms by Ernest Hemingway concentrates on negative impacts of war, overall loss and how it affects people by making them lose the capacity for moral judgment and rational thought. Brief synopsis Henry, while serving in the front line of the Italian forces is wounded on the knee by a mortar shell and is admitted to a hospital in Milan. While in the hospital, he meets Catherine whom he falls in love with. The relationship blossoms in summer as they spent time together in Milan. After three months of staying together, Catherine gets pregnant. Henry returns to his unit but after a short period, he engages in the battle of Caporetto where Austro-German forces overpowered the Italian forces and forced them to retreat. While escaping from the enemys onslaught, their car is stuck in the mud and when two sergeants engineers picked on the way refuse to take an order of assisting in getting the car out of mud, Henry kills one of them. On realizing that they will be killed, Henry and other drivers seek refuge in a farm house and resurface on the next day. Henry is seized by the battle police and after hearing that a Lt. Colonel had been executed; Henry sets himself free from the grip of the battle police and dive into a river thus escaping from a possible execution. Henry and Catherine reunite and using a boat, they flee to Switzerland. They live a quiet life in a mountainous region in Switzerland and after a while, Catherine goes into labor. After a painful and long labor, Catherine gives birth to a stillborn son, gets a Hemorrhage and soon passes on leaving Henry who gets back to the hotel in the rain (Bakers 56). Factors that motivated Ernest Hemingway to write the Novel In 1918, during the First World War, Hemingway joined the Italian Red cross as an ambulance driver, where the Italian forces allied to French, British and Americans were fighting against Germany and Austrian Hungary. While serving in the Red Cross during the war, there are a number of experiences that prompted him to write the novel. The first experience occurred in July 8, 1918 when he together with three soldiers was hit by a trench mortar shell while crouching beyond the front line. Although Hemingway overstated the story over the years, it is clear that he was transferred to Milan where he falls in love with Agnes von Kurowsky, a Red Cross nurse. It is believed that the relationship between Henry and Catherine in the novel echoes Hemingways relationship with the Red Cross nurse. When Hemingway was working as a freelance journalist in Turkey and Greece, he witnessed the retreat of Greece army and its civilian which provided him a major foundation in writing his story .The story on retreat of the Italian troops was based on his experience on the retreat of Greece army and its civilians. The work by some authors has had a major influence on Hemingway Novel. In 1921 when he married his first of the four wives, he settled in Paris where he made important connections with American writers such as Ezra Pound and Gertrude Stein. In his collection of stories, In Our Time, he introduced Nick Adams; one of his favorite authors whose difficult road from Youth into maturity he had recorded influenced him into writing his novels. Hemingway uses two major symbols to drive his point home by stating that war shows the dark side of humanity and causes more harm than good. Symbolism in the Novel The novel uses symbolic language to connect to readers emotion by showing how war can affect peoples mode of living and thinking which results in them looking for an escapade that in the long run might have negative consequences. These symbols wrap up the major themes in the novel and are used by the writer in a big way. The widely used symbols are rain and Catherines hair. The rain In the context of the novel, rain symbolizes the foreseeable collapse of a happy life. While Catherine and Henry were sleeping on Bed listening to the storm outside, Catherine introduces the meaning of the rain. As the rain dropped on the roof, Catherine admits the fact that rain frightens her and goes further to state that it has a tendency of destroying things for lovers. In real life situation, meteorological phenomena do not have such power but symbolically, Catherine fears is shown to be prophetic where after a short while, doom befalls the lovers. After the death of Catherine, Henry leaves the Hospital and walks home in the rain. In this case, the falling rain verifies Catherines anxiety and confirms one of the argument of the novel that great love just like other things in the world however good or bad they may be do not last forever (Mellow 103). Catherines hair Catherines hair is an important symbol in the novel. In the early stages of their relationship, as Catherine and Henry lie in bed, Catherine takes down her hair and lets it flow over Henrys head. The fall of Catherines hair reminds Henry of being behind a water fall or enclosed in a tent. The picture exhibited by the hair stand as a symbol of the isolation of the couples from the world. With a fierce war around them, they successful secure a wonderful seclusion which they believe is protected by something that is as delicate as hair. Later, when they are completely isolated from devastation of war and living in peace in Switzerland, they learn a cruel lesson that affection in the face of harsh reality is as short-lived and delicate as hair (Meyers 87) The impact of symbolism in defining the theme of Realism Symbols have been used well to define major themes in the novel and have been echoed in the theme of realism that encompass the harsh reality of war, love and pain, and escape from reality. The rain shows the reality that befalls Henry where he uses love as a guise in running away from war but ends up in tragedy. The war caused him to engage in a wrong relationship that ultimately ended in death of Catherine and the baby. The reality within the symbol of the rain is that anything however genuine it is has a short lifespan and this is well exhibited in the love relationship he engages with Catherine that takes a short span. The delicate nature of the love affair is symbolized by Catherines hair. The symbols bring out the theme of realism in a number of ways. The harsh reality of war The title of the novel is depicted in line of war which Frederic Henry struggles to set himself free from and leave it behind. Few characters such as Gino and Ettore Moretti support the war but majority of them are hesitant about the war, doubtful of the glory it allegedly brings and resentful of the havoc it brings about. The novel provides a clear description of the violent chaos and senseless brutality brought about by the conflict. As the values and integrity of men in the society begin to disintegrate, the negative effect is felt in the soldiers minds, nerves and their capacity for moral judgment and rational thought. For instance, Henry shoots an Engineer for refusing to help him free the car that had stuck in the mud, a violent outburst that contradict his coolly detached character. The murder of the engineer seemed to be justified because it is an expected result of violence and disorder of war (Waldhorn 76). Love and Pain The theme of realism is depicted well in the relationship between love and pain. Against the background of the ravages of war, Hemingway offers a mournful, deep mediation on the nature of love. Catherine initiates a game meant to seduce Henry while still mourning her dead fiancà © with an aim of distancing herself from the pain of her lost love. Love can bring about misery and can as well be used as a cure for the misery. Henry intends to move far away from war as possible and so together with his love, they find temporary solace from things that affect them. Henry understands how critical his love for Catherine is, offsets any concern for abstract ideals such as fame in order to flee the war and look for her. This is a clear indication that love can go as far as distracting a person from everyday life. The tragedy faced by the couple show that love, however genuine it may be is always temporary as other things of the world as depicted in the symbol of the rain while at the same tim e it is as delicate as Catherines hair (Oliver, 68). Escape from reality Escape from reality expounds on the theme of realism in a number of ways. Henrys involvement with Catherine is aimed at escaping the insanity of war. Actually the extreme circumstance of the war brought the two together thus creating an environment that allowed them to fall in love. The love affair provides Henry an emotionally safe landing where he can evade the reality of the war. Under normal circumstances, the relationship would not have occurred but due to the conditions that surrounded both Catherine and Henry, the relationship was initiated with ease. In order to escape the reality of war by getting into a love relationship with Catherine, Henry had misunderstood his actions. He had alienated himself from the environment of war which he believed had no place in his life but when Aymo is killed by his own army, he discovers that he is not really separated at all from the events and gets into a reality that he is an integral part of the war and has no chance of avoiding it. At t his instance, he gets scared and so in order to escape immediately, he separates himself through love. When Catherine is about to deliver her first child, Henry becomes nervous. Although the baby is the product of their love, he becomes an important tool in connecting Henry to the reality of his current situation even though the insanity of war is over. The symbol of the rain as prophesized by Catherines fear of the rain is well explained where neither Catherine nor Henry handles the situation at hand. Catherine shows her inability to cope with the situation physically through her death and the death of the child. Fredrick exhibits his inability to cope with the circumstances through his peculiar behavior such as getting frightened of numbers over two (Bloom 88). Symbolism as used in explaining the Negative impact of the war Basing on the rain as a symbol, the ultimate decision of Henry abandoning the war and settling for love ends tragically which clearly signify that war has numerous negative effects. War forces people to engage in things that might seem good at the start but end in a bad note. Through the symbol of rain, the negative effect of war is well depicted where Henry engages in acts of escapism to evade insanity caused by the war. His escape from the negative reality of war ultimately leaves him a dejected man. War is a major theme in the novel and defines many evils that result from its madness. Generally, war has defined human beings for many years and shows how deeply people hate each other. The novel has little combat but exhibits numerous effects of war. For instance the town, Gorizia, functions normally although there are people dying around it. More people die from diseases than in combat which is one of the effects of war. The act of war within the novel is involved in everything and this can be proved by the act of Henry and others making fun of the priest. Actually, war is always in the background. The confusion of war causes some members of the forces to engage in unethical acts in the name of duty. For instance Rinaldi and Fred chase their women and carry on with their duties. The action of chasing the women indicates that war moulds people who have no feelings and can thus do anything to win it. When the business of war commences, the men express their feeling about it where the drivers state that it is a conflict in terms of class struggle and so they were not willing to fight it at all. Shelling and shooting in the war results in injuries and death. Henrys legs are torn apart while one of his men is killed by an explosion which rocks them. War results in people losing their moral judgment and rational thought and thus engages in horrendous acts. For instance, Fred learns a shocking fact that the wounded soldiers must be left behind the hills as it is diff icult to defend the mountains against attack by the Germans and so they retreat abandoning them instead of offering assistance to them. In this case, war promotes selfishness and kills the spirit of assistance as specified by wounded people being left in the battle field. Negative impact of the war gets intense as the retreat continues. Henry shoots and kills one of the engineers after they refused to take his orders and injures another who in the long run is killed by Bonello. It is apparent that the drivers do not want to be engaged in the war but they are forced to and develop heartlessness which in turn has negative effects on their conscience. Retreat by Italian forces brought about confusion where Italian officers panicked, started interrogating and executing anyone who was not Italian. This obviously shows that war causes people to lose their sense of humanity and allows impunity to sets in. The emotional effect of the war causes people to make wrong decisions and undertake w rong actions that under normal circumstances would not have happened. As a result of the war and quest to escape from it, Henry engages in a love relationship with Catherine. Although he managed to run away from the effects of the war, the end result of this love is tragic where both Catherine and the child die leaving Henry a dejected man. Despite the fact that the novel talks about the effects of the war, it fails to condemn it harshly but states that war is an inevitable outcome of senseless and cruel world. Hemingway puts forward his opinion by stating that war is nothing more than murderous and dark extension of a world that fails to protect, acknowledge and preserve true love (Hemingway 12). Conclusion A Farewell to Arms written by Ernest Hemingway describes how war affects the moral judgment and rational thought of people. People make wrong decisions and end up in tragedies as symbolized by the rain in Henrys situation. For instance, Henry engages in a relationship that ends in the death of Catherine and their baby. War affects the economic, social and political aspect of any society as it is an extension of the world that fails to acknowledge, protect and preserve true love.

Price Test Triggers Outrage on Internet :: Essays Papers

Price Test Triggers Outrage on Internet Will dynamic pricing become the next trend in e-commerce? Maybe, to unsuspecting consumers, it already is. The Internet provides consumers with many shopping advantages including the ease and availability of shopping from home, and the benefit of easily comparing merchandise and prices at various online retail locations. Dynamic pricing is a process where retailers (in this case, online) adjust their pricing according to information directly related to the purchasing consumer, or the conditions around them. An example of dynamic pricing in the physical world might be the local coffee shop charging more for hot coffee in the wintertime. This seems rather harmless, does it not? In e-commerce this kind of price fixing is worrisome because of the type of information a web site developer can retrieve from, or add to a visitor's computer using a variety of programming tools. There are few laws or regulations governing the use of the Internet, or protecting consumers' privacy. This c reates a wide open door for online marketing schemes that take advantage of, or deceive the consumer. David Sheffield, or the Washington Post, writes that Amazon.com, one of the leading online retailers, has been implementing a questionable pricing test. Using advanced technology, Amazon was able to place an electronic tag into the computer systems of all their web site visitors. When a consumer visited their web site, it would look for that tag on the visitors system to see if the visitor is a new or existing customer. By knowing this, the site would know what prices to display. Though one would think the repeat customer would benefit from this by getting price breaks, it was actually just the opposite. Amazon.com was charging higher prices for returning customers! Bill Curry, spokesman for Amazon.com, is quoted as saying the price test "was done to determine consumers' responses to different discount levels." However, in an email exchange with a DVDTalk member, an Amazon customer service representative stated "I would first like to send along my most sincere apology for any confusion or frustration caused by our dynamic price test". Whether it was dynamic pricing, or not, the deeper issue of consumers' online privacy still remains. Amazon.com was able to perform this "price test" because of a lack of laws regulating e-commerce, and consumer privacy. There are only a few laws now pertaining directly to Internet related issues, and most of these are state laws, not national. Price Test Triggers Outrage on Internet :: Essays Papers Price Test Triggers Outrage on Internet Will dynamic pricing become the next trend in e-commerce? Maybe, to unsuspecting consumers, it already is. The Internet provides consumers with many shopping advantages including the ease and availability of shopping from home, and the benefit of easily comparing merchandise and prices at various online retail locations. Dynamic pricing is a process where retailers (in this case, online) adjust their pricing according to information directly related to the purchasing consumer, or the conditions around them. An example of dynamic pricing in the physical world might be the local coffee shop charging more for hot coffee in the wintertime. This seems rather harmless, does it not? In e-commerce this kind of price fixing is worrisome because of the type of information a web site developer can retrieve from, or add to a visitor's computer using a variety of programming tools. There are few laws or regulations governing the use of the Internet, or protecting consumers' privacy. This c reates a wide open door for online marketing schemes that take advantage of, or deceive the consumer. David Sheffield, or the Washington Post, writes that Amazon.com, one of the leading online retailers, has been implementing a questionable pricing test. Using advanced technology, Amazon was able to place an electronic tag into the computer systems of all their web site visitors. When a consumer visited their web site, it would look for that tag on the visitors system to see if the visitor is a new or existing customer. By knowing this, the site would know what prices to display. Though one would think the repeat customer would benefit from this by getting price breaks, it was actually just the opposite. Amazon.com was charging higher prices for returning customers! Bill Curry, spokesman for Amazon.com, is quoted as saying the price test "was done to determine consumers' responses to different discount levels." However, in an email exchange with a DVDTalk member, an Amazon customer service representative stated "I would first like to send along my most sincere apology for any confusion or frustration caused by our dynamic price test". Whether it was dynamic pricing, or not, the deeper issue of consumers' online privacy still remains. Amazon.com was able to perform this "price test" because of a lack of laws regulating e-commerce, and consumer privacy. There are only a few laws now pertaining directly to Internet related issues, and most of these are state laws, not national.

Urban Legend of Cry Baby Bridge :: Urban Legends Ghost Stories

Cry Baby Bridge In April I sat down with a friend at my house and asked about any urban legends or ghost stories he had encountered. After a couple legends he had seen in movies, he mentioned a haunted bridge about ten minutes away from downtown. He is a twenty-one year-old White male; his father owns an appliance store and his mother helps out with the books. He first heard this story in the ninth grade from a couple of friends. Supposedly, they had heard from kids who had actually been to the bridge and heard strange things at night. The bridge is located off of Uniontown road, between a couple old farms. He has not encountered the bridge first hand but still remembers the story surrounding it: About thirty years ago there was a young girl in love with her boyfriend. One day, he convinced her to take their relationship to the next level, telling her how deeply he cared. A couple weeks later, she found out that she had become pregnant, and decided it was best to hide it from him. They kept in close contact over the next few months, and he told her that they would be together forever. When her father realized that she was having a baby without marriage, he made her leave the house until she came back with a husband. When the baby girl was born, she decided to tell the boyfriend about the child, by bringing her to his house. He lived on a small farm right outside town and you had to pass over a small river on a bridge to get back to his house. As she opened the door, she walked in on him with another girl. Filled with anger, (pause) she gets in her car and speeds off. Now she could not return home unmarried and had lost her only love because of this one child. As she looked over at the baby, she is only reminded of her boyfriend and the image of him with the other girl. (tone increases) Finally, she reached the bridge, then slammed on the breaks. She got out and in a moment of rage threw the baby over the bridge to rid her of the baby girl’s troubles. Later that night, the police were tipped off about a murder at the bridge and came to find the girl hanging from the bridge. Urban Legend of Cry Baby Bridge :: Urban Legends Ghost Stories Cry Baby Bridge In April I sat down with a friend at my house and asked about any urban legends or ghost stories he had encountered. After a couple legends he had seen in movies, he mentioned a haunted bridge about ten minutes away from downtown. He is a twenty-one year-old White male; his father owns an appliance store and his mother helps out with the books. He first heard this story in the ninth grade from a couple of friends. Supposedly, they had heard from kids who had actually been to the bridge and heard strange things at night. The bridge is located off of Uniontown road, between a couple old farms. He has not encountered the bridge first hand but still remembers the story surrounding it: About thirty years ago there was a young girl in love with her boyfriend. One day, he convinced her to take their relationship to the next level, telling her how deeply he cared. A couple weeks later, she found out that she had become pregnant, and decided it was best to hide it from him. They kept in close contact over the next few months, and he told her that they would be together forever. When her father realized that she was having a baby without marriage, he made her leave the house until she came back with a husband. When the baby girl was born, she decided to tell the boyfriend about the child, by bringing her to his house. He lived on a small farm right outside town and you had to pass over a small river on a bridge to get back to his house. As she opened the door, she walked in on him with another girl. Filled with anger, (pause) she gets in her car and speeds off. Now she could not return home unmarried and had lost her only love because of this one child. As she looked over at the baby, she is only reminded of her boyfriend and the image of him with the other girl. (tone increases) Finally, she reached the bridge, then slammed on the breaks. She got out and in a moment of rage threw the baby over the bridge to rid her of the baby girl’s troubles. Later that night, the police were tipped off about a murder at the bridge and came to find the girl hanging from the bridge.

History Exam Questions Essay

1. Where and why did Spain establish colonies in North America, and how did native peoples resist colonization? Spain established colonies in Central America, the Caribbean islands, and Mexico to increase their wealth and power. The native people resisted colonization by trying to fight back. 2. How did the Chesapeake colonies support the aims of British mercantilism? The Chesapeake colonies supported British mercantilism with their tobacco crops and the Bay’s rich fisheries. These served as highly valuable to Britain. 3. Why did slavery replace servitude as the dominant labor system in Virginia and Maryland? Through most of the 17th century, the Black population was small. Sometime after 1680, buying a slave for their lifetime was a greater investment than paying for an indentured servant. Lastly, the number of Africans bought by British dealers was up to 20,000 per year. Thus, this transition led slavery to replace servitude. 4. What caused the Beaver Wars and how did the French respond? The Beaver Wars was caused by a series of conflicts fought in 17th century in eastern North America. The French responded by participating in a war with them. 5. Who settled the earliest New England colonies, and why? The Puritans settled the earliest in New England colonies for religious freedom. 6. In what ways were the Mid-Atlantic colonies more diverse than the other colonies of the period? Mid-Atlantic colonies are more diverse because they have many different cultures living in that area. Moreover, diverse groups settled leaving a variety of religions or national origin. 7. Why did Spain establish colonies in Texas and California, and what role did missions play in anchoring the Spanish presence? The Spanish established colonies in Texas because they used it as a prevention of the French. The role it played was as a buffer. Spain settled in California as a last project in North America. 8. How did Louisiana differ from French Canada? 9. What kinds of divisions led to social tensions and conflicts in British North America? Divisions between different countries led to the social tensions. Many of their territories with divided. This later became known as the British North American Act. 10. How did African American culture evolve in the slave community, and what forms did resistance to captivity take? African American culture began to evolve when slaves with actually able to communicate with each other and when the female population went up and it made it possible for them to start families. Then, the combination of their elements of speech, religion and folk ways were developed. Resistance to captivity occurred in songs, key words, and many other creative ways. Identifications – All answers are worth 5 points. 11. With regards to agriculture, what does the term â€Å"monoculture† mean? Monoculture id the cultivation of a single crop (on a farm or area or country). 12. Define the term â€Å"celibate†. â€Å"Celibate† is a person who abstains from sexual relations. 13. Who was Pope’? John Pope was pope. 14. Give a good working definition of the practice of â€Å"mercantilism†. Mercantilism is economic theory that trade generates wealth and is stimulated by the accumulation of profitable balances, which a government should encourage by means of protectionism 15. What does the term â€Å"indentured servant† mean? An indentured servant is a person who bounds himself or herself to serve someone for a certain period of time in exchange for something else. 16. What does the term â€Å"racism† mean? Racism is hatred or intolerance of another race or other races and cultures 17. What did the term â€Å"Counter-Reformation† mean to the Roman Catholic Church? The Counter Reformation is a reformation counteracting a previous reformation. 18. What were the six tribes of the Iroquois League? The six tribes of the Iroquois were The Onondaga Nation, Oneida Nation, Seneca Nation, Tuscarora Nation, Mohawk Nation, and the Cayuga Nation. 19. As part of Calvinist theology, what does the term â€Å"predestination† mean? The term predestination was the question of the control God exercises over the world. 20. What is the principle of the â€Å"separation of Church and State†? The principle is to maintain a distance in relationship between organized religion and the Nation state. Who were the Quakers? They were a large group of immigrants that left England for freedom. 21. 22. Who was Metacom? Metacom was a Wampanoag chief who brought different American Indian groups together to fight against the English 23. What is an artisan? A artisan is a skilled trade worker, especially making things by hand. 24. Under slavery, what was the â€Å"task system†? A system used during slavery that allowed some slaves to work unsupervised as long as they complete the task within time. 25. What were â€Å"Maroon communities†? The Maroon communities were places a runaway slave could escape to. 26. What was the Enlightenment? A period during the seventeenth and eighteenth centuries when European philosophers pondered aspects of education, law, social theory, superstition, and ignorance. What was the Great Awakening? A American religious movement that began in New England near the mid 1730’s. 27. 28. What did the English consider to be a â€Å"balanced constitution†? A balance of power would be considered a balanced constitution. 29. What was â€Å"benign or salutary neglect†? â€Å"Benign or salutary neglect is when the Americans realized that they did not have to follow English law. 30. What is â€Å"The Fandango†? The â€Å"Fandango† is a Spanish dance.