The Electronic Electrical Engineering Engineering Essay

The Electronic Electrical Engineering Engineering Essay Electronic electrical engineering incorporated with mechanical system has a big impact in a variety of field, such as biomedical, underwater vehicle, safety and security, space and etc. Before we actually start discussing the benefits and advantages that electronic and electrical engineering gives us in our everyday life, lets have some insights of the history of electronic engineering. Electronic engineering as a profession sprang from technological improvements in the  telegraph  industry in the late 1800s and the  radio  and the  telephone  industries in the early 1900s. People were attracted to radio by the technical fascination it inspired, first in receiving and then in transmitting. Many who went into broadcasting in the 1920s were only amateurs in the period before  World War I. The modern discipline of electronic engineering was to a large extent born out of telephone, radio, and  television  equipment development and the large amount of electronic systems development during  World War II  of  radar,  sonar, communication systems, and advanced munitions and weapon systems. In the interwar years, the subject was known as  radio engineering  and it was only in the late 1950s that the term  electronic engineering  started to emerge. In underwater, electronic and electrical engineering is doing a paramount job in the development of underwater vehicle technology, such as submarine, remotely operated underwater vehicle, and more significantly, automated underwater vehicle. An Autonomous Underwater Vehicle (AUV) is a robotic device that is driven through the water by a propulsion system, controlled and piloted by an onboard computer, and maneuverable in three dimensions. This level of control, under most environmental conditions, permits the vehicle to follow precise preprogrammed trajectories wherever and whenever required. Sensors on board the AUV sample the ocean as the AUV moves through it, providing the ability to make both spatial and time series measurements. Sensor data collected by an AUV is automatically geospatially and temporally referenced and normally of superior quality. Multiple vehicle surveys increase productivity, can insure adequate temporal and spatial sampling, and provide a means of investigat ing the coherence of the ocean in time and space. The fact that an AUV is normally moving does not prevent it from also serving as a Lagrangian, or quasi Eulerian, platform. This mode of operation may be achieved by programming the vehicle to stop thrusting and float passively at a specific depth or density layer in the sea, or to actively loiter near a desired location. AUVs may also be programmed to swim at a constant pressure or altitude or to vary their depth and/or heading as they move through the water, so that undulating sea saw survey patterns covering both vertical and/or horizontal swaths may be formed. AUVs are also well suited to perform long linear transects, sea sawing through the water as they go, or traveling at a constant pressure. They also provide a highly productive means of performing seafloor surveys using acoustic or optical imaging systems. When compared to other Lagrangian platforms, AUVs become the tools of choice as the need for control and sensor power increases. The AUVs advantage in this area is achieved at the expense of endurance, which for an AUV is typically on the order of 8- 50 hours. Most vehicles can vary their velocity between 0.5 and 2.5 m/s. The optimum speed and the corresponding greatest range of the vehicle occur when its hotel load (all required power except propulsion) is twice the propulsive load. For most vehicles, this occurs at a velocity near 1.5 m/s. The degree of autonomy of the robot presents an interesting dichotomy. Total autonomy does not provide the user with any feedback on the vehicles progress or health, nor does it provide a means of controlling or redirecting the vehicle during a mission. It does, however, free the user to perform other tasks, thereby greatly reducing operational costs, as long as the vehicle and the operator meet at their duly appointed times at the end of the mission. For some missions, total autonomy may be the only choice; in other cases when the vehicle is performing a routine mission, it may be the preferable mode of operation. Bidirectional acoustic, radio frequency, and satellite based communications systems offer the capability to monitor and redirect AUV missions worldwide from a ship or from land. For this reason, semi-autonomous operations offer distinct advantages over fully autonomous operations. In the outset of development of AUV, AUVs have been used for a limited number of tasks dictated by the technology available. With the development of more advanced processing capabilities and high yield power supplies, AUVs are now being used for more and more tasks with roles and missions constantly evolving. Its application covers a variety of field, such as in commercial, military, research, as well as hobby. In the commercial side, the oil and gas industry employs AUVs to sketch out detailed maps of the seafloor before they start building subsea infrastructure; pipelines and subsea completions can be installed in the most cost effective manner with minimum disruption to the environment. The AUV allows survey companies to conduct precise surveys or areas where traditional bathymetric surveys would be less effective or too costly. Also, post-lay pipe surveys are now possible. Whereas in the military field, AUV does play an important role as a typical military mission for an AUV is t o map an area to determine if there are any mines, or to monitor a protected area (such as a harbor) for new unidentified objects. AUVs are also employed in anti-submarine warfare, to aid in the detection of manned submarines. Apart from that, scientists use AUVs to study lakes, the ocean, and the ocean floor. A variety of sensors can be affixed to AUVs to measure the concentration of various elements or compounds, the absorption or reflection of light, and the presence of microscopic life. Sensors, the primarily oceanographic tools, AUVs carry sensors to navigate autonomously and map features of the ocean. Typical sensors used by AUV include  compasses, depth sensor, side scan and other sonar, magnetometers,  thermistors  and conductivity probes.  One of the most conspicuous contributions of electrical and electronic engineering incorporated with mechanical system is the navigation of AUV. AUVs can navigate using an  underwater acoustic positioning system. An  Underwater Acoustic Positioning System  is a system for the tracking and navigation of underwater vehicles or divers by means of acoustic distance and/or direction measurements, and subsequent position triangulation. Underwater Acoustic Positioning Systems are commonly used in a wide variety of underwater work, including oil and gas exploration,  ocean sciences, salvage operations,  marine archeology, law enforcement and military activities. Basically, there are three broad types or classes that can be categorized in underwater acoustic positioning system. The first one is Long Baseline (LBL) Systems:  Long baseline systems, use a sea-floor baseline transponder network. The transponders are typically mounted in the corners of the operations site. LBL systems yield very high accuracy of generally better than 1 m and sometimes as good as 0.01m along with very robust positions. This is due to the fact that the transponders are installed in the reference frame of the work site itself (i.e. on the sea floor), the wide transponder spacing results in an ideal geometry for position computations, and the LBL system operates without an acoustic path to the (potentially distant) sea surface. Acoustic positioning systems measure positions relative to a framework of  baseline stations, which must be deployed prior to operations. In the case of a  long baseline (LBL)  system, a set of three or more baseline transponders are de ployed on the sea floor. The location of the baseline transponders either  relative to each other  or in global  must then be measured precisely. Some systems assist this task with an automated  acoustic self-survey, and in other cases  GPS  is used to establish the position of each baseline transponder as it is deployed or after deployment. When a surface reference such as a support ship is available,  ultra-short baseline  (USBL) or  short-baseline (SBL)  positioning is used to calculate where the subsea vehicle is relative to the known (GPS) position of the surface craft by means of acoustic range and bearing measurements. USBL systems and the related super short baseline (SSBL) systems rely on a small (ex. 230  mm across), tightly which is installed either on the side or in some cases on the bottom of a surface vessel. Unlike LBL and SBL systems, which determine position by measuring multiple distances, the USBL transducer array is used to measure the target  distance  from the transducer pole by using signal run time, and the target  direction  by measuring the  phase shift  of the reply signal as seen by the individual elements of the transducer array. The combination of distance and direction fixes the position of the tracked target relative to the surface vessel. Additional sensors including GPS, a gyro or electronic compass and a vertical reference unit are then used to compensate for the changing position and orientation (pitch, roll, and bearing) of the surface vessel and its transducer pole. USBL systems offer the advantage of not requiring a sea floor transponder array. The disadvantage is that positioning accuracy and robustness is not as good as for LBL systems. The reason is that the fixed angle resolved by a USBL system translates to a larger position error at greater distance. Also, the multiple sensors needed for the USBL transducer pole position and orientation compensation each introduce additional errors. Finally, the non-uniformity of the underwater acoustic environment cause signal refractions and reflections that have a greater impact on USBL positioning than is the case for the LBL geometry integrated transducer array that is typically mounted on the bottom end of a strong, rigid transducer pole. In the other hand short baseline systems use a baseline consisting of three or more individual sonar transducers that are connected by wire to a central control box. Accuracy depends on transducer spacing and mounting method. When a wider spacing is employed as when working from a large working barge or when operating from a dock or other fixed platform, the performance can be similar to LBL systems. When operating from a small boat where transducer spacing is tight, accuracy is reduced. Like USBL systems, SBL systems are frequently mounted on boats and ships, but specialized modes of deployment are common too. For example, the  Woods Hole Oceanographic Institution  uses a SBL system to position the  Jason  deep-ocean ROV relative to its associated MEDEA depressor weight with a reported accuracy of 9  cm. Besides, GPS Intelligent Buoys (GIB) is also employed in AUV navigation; the systems are inverted LBL devices where the transducers are replaced by floating buoys, self-po sitioned by GPS. The tracked position is calculated in real time at the surface from the Time-Of-Arrival (TOAs) of the acoustic signals sent by the underwater device, and acquired by the buoys. Such configuration allows fast, calibration-free deployment with accuracy similar to LBL systems. At the opposite of LBL, SBL or USBL systems, GIB systems use one-way acoustic signals from the emitter to the buoys, making it less sensible to surface or wall reflections. GIB systems are used to track AUVs, torpedoes, or divers, may be used to localize airplanes black-boxes, and may be used to determine the impact coordinates of inert or live weapons for weapon testing and training purposes. In recent years, several trends in underwater acoustic positioning have emerged. One is the introduction of compound systems such the combination of LBL and USBL in a so-called LUSBL configuration to enhance performance. These systems are generally used in the offshore oil gas sector and other high-end applications. Another trend is the introduction of compact, task optimized systems for a variety of specialized purposes. For example the California Department of Fish and Game  commissioned a system, which continually measures the opening area and geometry of a fish sampling net during a trawl. That information helps the department improve the accuracy of their fish stock assessments in the  Sacramento River Delta. Hundreds of different AUVs have been designed over the past 50 or so years, but only a few companies sell vehicles in any significant numbers. Vehicles range in size from man portable lightweight AUVs to large diameter vehicles of over 10 meters length. Once popular amongst the military and commercial sectors, the smaller vehicles are now losing popularity. It has been widely accepted by commercial organizations that to achieve the ranges and endurances required to optimize the efficiencies of operating AUVs a larger vehicle is required. However, smaller, lightweight and less expensive AUVs are still common as a budget option for universities. Some manufacturers have benefited from domestic government sponsorship including Bluefin and Kongsberg. The market is effectively split into three areas: scientific (including universities and research agencies), commercial offshore (oil and gas etc.) and military application (mine countermeasures, battle space preparation). The majority of these roles utilizes a similar design and operates in a cruise mode. They collect data while following a preplanned route at speeds between 1 and 4 knots. Commercially available AUVs include various designs such as the small REMUS 100 AUV developed by  Wood Holes Oceanographic Institution in the US. Most AUVs follow the traditional torpedo shape as this is seen as the best compromise between size, usable volume, hydrodynamic efficiency and ease of handling. There are some vehicles that make use of a modular design, enabling components to be changed easily by the operators.   The market is evolving and designs are now following commercial requirements rather than being purely developmental. The next stage is likely to be a hybrid AUV/ROV that is capable of surveys and light intervention tasks. This requires more control and the ability to hover. Again, the market will be driven by financial requirements and the aim to save money and expensive ship time. Today, while most AUVs are capable of unsupervised missions most operators remain within range of acoustic telemetry systems in order to maintain a close watch on their investment. This is not always possible. For example, Canada has recently taken delivery of two AUVs (ISE Explorers) to survey the sea floor underneath the Arctic ice in support of their claim under Article 76 of the United Nations Convention of the Law of the Sea. Also, ultra-low-power, long-range variants such as  underwater gliders  are becoming capable of operating unattended for weeks or months in littoral and open ocean areas, per iodically relaying data by satellite to shore, before returning to be picked up.

Light Reactions and Plant Pigments

The Effect of Light Reactions on Plant Pigmentation Alyssa Martinez AP Biology 4th pd E. Perkins Abstract In this lab, we were to separate pigments and calculate Rf  values using plant pigment chromatography, describe a technique to determine the photosynthetic rate, compare photosynthetic rates at different light intensities using controlled experiments and explain why rate  of photosynthesis varies under different environmental conditions. In the second part of the lab, we used chloroplasts extracted from spinach leaves and incubated then with DPIP and used the dye-reduction technique. When the DPIP is reduced and becomes  colorless, the resultant increase in light transmittance is measured over a  period of time using a spectrophotometer. If pigments are separated, then Rf values can be determined. Introduction Paper chromatography is a  useful technique for separating and identifying pigments and other molecules from cell extracts that contain a  complex mixture of molecules. As solvent moves up  the  paper, it carries along any  substances dissolved in it. The more soluble, the further  it travels and vice-versa. Beta carotene is  the most abundant carotene in plants and is  carried along near the solvent front since it is very soluble and  forms no hydrogen bonds with cellulose. Xanthophyll contains oxygen and is found further from the solvent front since it  is less soluble in the solvent and is  slowed down by hydrogen  bonding to cellulose. Chlorophyll a is  primary photosynthetic pigment in plants. Chlorophyll a, chlorophyll b, and carotenoids capture light energy and transfer it to  chlorophyll a at the reaction center. Light is  part of a continuum of radiation or energy waves. Shorter wavelengths of energy have greater amounts of energy. Wavelengths of light within the visible spectrum of  light power  photosynthesis. Light is absorbed by leaf  pigments while electrons within each photosystem are boosted to a higher energy level. This energy level is  used to produce ATP and reduce  NADP to NADPH. ATP and  NADPH are then used to  incorporate CO2 into organic molecules. In place of  the electron accepter, NADP, the compound DPIP  will be substituted. It changes chloroplasts from blue to colorless. Methodology Obtain a 50 ml graduated cylinder which has about 1 cm of solvent at the bottom. Cut a piece of  filter paper which will be long enough to reach the solvent. Draw a line about 1. 5 cm from the bottom of the paper. Use a quarter to extract the pigments from spinach leaf cells and place a small section of leaf on top of the pencil line. Use the ribbed edge of the coin to crush the leaf cells and be sure the pigment line is on top of the pencil line. Place  the chromatography  paper in the cylinder and cover the cylinder. When the solvent is about 1 cm from the top of the paper, remove the paper  and immediately mark the location of the solvent front before it evaporates. Mark the bottom of each pigment band and measure the distance each pigment migrated from the  bottom of the pigment origin to the bottom of the separated pigment band and record the distances. Then, turn on the spectrophotometer to warm up the instrument and set the wavelength to 605 nm. Set up an incubation area that  includes a light, water flask, and test tube rack. Label the cuvettes 1, 2, 3, 4, and 5, respectively. Using lens tissue, wipe the outside walls of each cuvette. Using foil paper, cover the walls and bottom of cuvette 2. Light should not  be permitted inside cuvette 2 because it is a control for this experiment. Add 4 mL of distilled water to cuvette 1. To 2, 3, and 4, add 3 mL of distilled water and  1 mL of DPIP. To 5, add 3  mL plus 3 drops of distilled water and 1mL of DPIP. Bring the spectrophotometer to zero by adjusting the amplifier control knob until the meter reads 0% transmittance. Add 3 drops of unboiled chloroplasts and cover the top of cuvette 1 with Parafilm and invert to mix. Insert cuvette 1 into  the sample holder and adjust the  instrument to 100% transmittance. Obtain the unboiled chloroplast suspension, stir to mix, and transfer 3 drops to cuvette 2. Immediately cover and mix cuvette 2. Then remove it from the foil sleeve and  insert it into the spectrophotometer's sample holder, read the percentage transmittance, and record it. Replace cuvette 2 into the foil sleeve,  and place it into the incubation test tube rack and turn on the flood light. Take and record additional readings at 5, 10, and 15  minutes. Mix the cuvette’s contents before each reading. Take the unboiled chloroplast suspension, mix, and transfer 3 drops to cuvette 3. Immediately cover and mix cuvette 3 and insert it into the spectrophotometer's sample holder, read the percentage transmittance, and record. Replace cuvette 3 into the incubation test tube rack. Take and record additional readings at 5, 10, and  15 minutes. Mix the cuvette's contents just prior  to each readings. Obtain the boiled chloroplast suspension, mix, and transfer 3 drops to cuvette 4. Immediately cover and mix cuvette 4. Insert it into the spectrophotometer's sample holder, read the percentage transmittance, and record it. Replace cuvette 4 into the incubation test tube rack and take and record additional readings at 5, 10, and  15 minutes. Cover and mix the contents of cuvette 5 and insert it into the spectrophotometer's sample holder, read the percentage transmittance, and  record. Replace cuvette  5 into the incubation test tube rack and take and record additional readings at 5, 10, and 15 minutes. Results Table 4. 1: Distance Moved by Pigment Band (millimeters) Band Number| Distance (mm)| Band Color| | | | | | | | | | | | | | | | Distance Solvent Front Moved ____ (mm) Table 4. 2: Analysis of Results __ = Rf for Carotene (yellow to yellow orange) __ = Rf for Xanthophyll (yellow) __ = Rf for Chlorophyll a (bring green to blue green) __ = Rf for chlorophyll b (yellow green to olive green) Table 4. 4: Transmittance (%) Time (minutes) Cuvette| 0| 5| 10| 15| 2 Unboiled/Dark| | | | | 3 Unboiled/Light| | | | | Boiled/Light| | | | | 5 No Chloroplasts/ Light| | | | | Analysis of Results Graph Discussion Chromatography  is  a  technique  used  to  separate  and identify pigments and other molecules from cell extracts that contain a complex mixture of molecules. This can be used to identify the pigments that are used in the  process of  photosynthesis. Photosynthesis is the process by which plants use light energy to produce chemical  energy in the form of food. This is where plant pigments come into play because they are the reason why the plant is able to absorb light. Chlorophyll a is one such  pigment. These pigments along with many others are contained in organelles known as chloroplasts. One of the problems encountered during the course of this lab included human error when using the spectrophotometer. The student made slight errors when setting the transmittance to the required levels. On a few occasions, the group accidentally introduced light into a cuvette where the variable being tested was the absence of light. This might have caused some error when taking measurements of the percentage  of transmittance. This resulted in skewed data, which meant that the experiment had to be repeated once more. During the first part of the  lab, the group made an error by allowing some part of the pigment  to be in the solvent. This did alter our results in the end. Topics for Discussion 4A: Plant Pigment Chromatography 1. What factors are involved in the separation of the pigments? The factors involved in the separation of the  pigments  from the  spinach plants  are the pigments’ solubility in the solution, how much they bind to the paper based on their chemical structure, and the size of the pigment particles. . Would you expect the Rf value of a pigment to be the same if a different solvent were used? Explain. No I would not expect the Rf values to be different because the pigments will dissolve differently in different types of solvents. For example, chlorophyll b is very soluble in hydrophobic solutions, so if the crushed spinach cells on the paper were put in a hydrophobic s olution, the chlorophyll b would move the highest and probably be right on the solution front, while the other pigments will move much less. 3. What type of chlorophyll does the reaction center contain? What are the roles of the other pigments? Chlorophyll a is in the reaction center, and the other pigments are able to absorb light from the other wavelengths that chlorophyll a cannot absorb light from, and then they transfer the energy harvested from the other wavelengths to the chlorophyll a, providing more energy to be used in photosynthesis. 4B: Photosynthesis/The Light Reaction 1. What is the function of DPIP in this experiment? DPIP is the electron acceptor in this experiment (instead of NADP which is what is normally used in plants). The electrons boosted to high energy levels will reduce the DPIP, which will change its color from blue to clear as more high energy electrons are absorbed by it. 2. What molecule found in chloroplast does DPIP â€Å"replace† in this experiment? It replaces NADP molecules that are found in chloroplasts. 3. What is the source of the electrons that will reduce DPIP? The electrons come from the photolysis of water. 4. What was measured with the spectrophotometer in this experiment? The light transmittance was measured, which really was the measure of how much the chloroplasts reduced the DPIP 5. What is the effect of darkness on the reduction of DPIP? Explain. Darkness will restrict any reaction to occur. 6. What is the effect of boiling the chloroplasts on the subsequent reduction of DPIP? Explain. By boiling chloroplasts, we denature the protein molecules, ending the reduction of DPIP. 7. What reasons can you give for the difference in the percent transmittance between the live chloroplasts that were incubated in the light and those that were kept in the dark? The percent transmittance grew to steadily higher numbers as the experiment progressed because the light reaction was able to occur. However, the dark cuvettes had stable levels of transmittance because light is necessary to excite electrons, which, in turn, reduces the DPIP. 8. Identify the function of each of the cuvettes. Cuvette 1: Used as the control Cuvette 2: Used to observe the rate of photosynthesis without light Cuvette 3: Used to observe the rate of photosynthesis with light Cuvette 4: Used to observe the rate of photosynthesis in boiled chloroplasts Cuvette 5: Used to observe the rate of photosynthesis

How far is it acceptable for technology to be used only for financial benefits Essay

?The inexorable development of technology has indeed become an integral part of our lives. Evidently, we often involve technology almost in every aspect of our lives. As a result, business in technology area seems very enticing for most people as they can potentially generate a lot of profit from this field. Hence, more and more people start to invest in it. However, as people are getting indulged in profit maximisation, problems concerning ethics and societal welfare start to arise from technology. Some argue that the usage of technology only for financial benefit is acceptable because such benefit can be redistributed to the less privileged ones to improve their welfare. However, others claim that it is unacceptable to do so because people, more often than not, may pursue such benefit at the expense of others. I, personally, am more inclined to the latter stand as the sole usage of technology for financial benefit will deal a fatal blow to the global society. It is acceptable to use technology for financial benefit only because it can indirectly contribute to the societal welfare. This is because some of the profit gained from the selling of such technology is used to help those in need. Hence, money earned is, in a way, redistributed to the poor to boost their welfare. A case in a point is the Gates Foundation in which Bill Gates, the founder of Microsoft, channels some of his profit from his business in the computer field to build this foundation to empower the needy to lead a better life. his is obviously unacceptable because every person has the right to have fair wages and enjoy conducive working environment. Thus, the use of technology only for financial benefit is still unacceptable, regardless of such benefit that may be used to help the last and the least, if some groups are being made worse off in the process. Furthermore, focusing only on financial benefit when we harness technology will make technological development shifts towards the favour of rich people only. Rich and poor people certainly have different kind of needs; while the rich aims, mostly, for self-enhancement, the poor are still struggling to survive. Hence, since the rich’s demand seems to be more lucrative for many investors because self-enhancement, like plastic surgery, is indubitably extornionate and, hence, generates a lot of profit, they will just invest their money for technological development in this area. As a result, more rudimentary aspects of technology, such as the mass production of food using food technology, are neglected. The poor will then suffer even to a greater extent than before. Another concern from this shift is that the widening of chasm between the rich and the poor will be more pervasive. Such result entails even worse implications in our society as social unrest may occur. Hence, given the dire consequences of the ill-use of technology, utilisation of it for financial benefit solely is unacceptable. Finally, the sole use of technology for financial benefit may corrupt our intrinsic values and virtues as human beings. Paradigm shift on our attitudes towards technology -more accepting and dependent – has made commodification of technology more successful. Thus, more and more people are focusing in this area and if their only goal for the use of technology is on monetary reward, they will do anything to its commercialisation to be even more successful. This includes the addition of elements in the technology itself to allure more people to use it. Unfortunately, those elements sometimes blemish our values as responsible humans. A case in a point would be the advent of violent video games (gaming technology) that distort the values of people, especially the teenagers and children. If they are exposed by the wrong principles throughout their stages of life, they will, most likely, not grow to people whom the society wants them to be. Hence, since the use of technology only for financial benefit results in such a case, I believe that it is unacceptable. In conclusion, it is unacceptable if technology is only used for financial benefit because others aspects concerning global welfare are most likely to be neglected. Therefore, a holistic approach should be adopted in harnessing the technology, so that multifarious fields in human lives are benefited. Hence, â€Å"technology is a social product† encapsulates the essence in the usage of technology as it should act as a representation of the fundamental needs of our society.

Youth Life at Its Peak in Sonnet 15 by William Shakespeare

As each day goes by the beauty of our vibrant youth decays and diminishes. In Sonnet 15 Shakespeare refers to youth as life at its peak, however this precious point in our life is short-lived. Shakespeare speaks of youth as a single moment of perfection. He glorifies youth and alleges to immortalize it through his poetic words. He uses metaphors, imagery, and rhyme in a way to enhance the beauty and perfection of mans youth while in its prime. Through this he demonstrate the love and richness of youth despite the tole time takes on it. Within the first few lines of the sonnet we notice Shakespeares use of metaphoric language. His usage of metaphors provokes another thought to the reader, rather then whats just written on the page.†¦show more content†¦Similar to the metaphor is the simile. Shakespeare makes a powerful comparison to man as a developing plant. That men as plants increase ... Cheered and Checked even by the self-same sky (Shakespeare, lines 5-6). Like plants, men develop, grow, as well as multiply. Both are weathered by the same conditions, and energized by the same source. Again, this comparison allows us to see the simplicity of a plant, and relate it to the complexity of man. By Shakespeare making the relation on a smaller scale, it allows the reader to better understand the point he is trying to convey. Even though man and plant are vastly different, this comparison allows us to see that in reality they are a lot alike. Another technique that Shakespeare uses to enhance his style is imagery. He uses imagery to evoke an experience that will hopefully appeal to the senses of the reader. Shakespeares use of imagery is very effective. However with the overall tone of the sonnet being both positive and negative, he produces both positive and negative imagery. Shakespeare refers to men as plants in line 5, When i perceive that men as plants increase We can interpret this as a case of positive imagery. Like men, plants grow and develop in h opes of reaching their pure perfection. They are considered to be perfect when they flourish into something beautiful, tall, strong and powerful. According to Shakespeare a