Lab Report Biology Sample

Lab Report Biology Paper Though goldfish are one of the easier species f aquatic life to care for, their respiratory systems are just as complex as any other fish. Like other aquatic animals, goldfish have a one-way flow respiratory system. This means that their respiratory system pumps water through their gills and back into the water supply to absorb oxygen. Gills?which are the organs that most aquatic animals use to breatheconsist of complex filters that extract oxygen from the water. There are many factors that can affect the respiration rate of an aquatic animal including temperature of water, oxygen levels, crowding, and pH levels. When the water temperature is raised, the goldfish will experience a spike in metabolic activities. It will require more food and will produce more waste. In order to support the increased activity, the goldfish will require more oxygen. Rate of respiration will increase and the goldfish may even gasp for air at the water surface. Hypothesis: As the temperature of water decreases, respiration rate of the goldfish also decreases. This is because in lower temperature, water can hold more dissolved oxygen compared to water with higher temperature, thus rate of respiration comes slower as enough oxygen are supplied. Variables: Variables I Method of controlling I Independent variable I Temperature of waters Dependent variable I Respiration rate of the goldfish I Controlled variable I 1. Type and number offish used. * A goldfish of species Carcasses erratum is used throughout this experiment. 2. Timeshare for counting propeller movements of the goldfish. * The goldfishs propeller movements are observed during 1 minute timeshare. 3. Number and size of beakers used. * 3 beakers of volume 500 ml are used for different water temperatures. I Table 1 shows the independent, dependent and controlled variables and methods to control them. Apparatus and materials: Apparatus I Quantity (s) I Container/tank 1 | 500 ml beaker 1 31 Thermometer | 1 | Stopwatch | 1 | Glass rod I II Fishnet | 1 | Table 2 shows the apparatus and its quantity needed in the experiment. Materials I Quantity (s) I Goldfish Ill Hot water I Less than 500 ml I Crushed ice I Half-filled beaker Plastic zip-lock bag | 1 | Masking tape (for labeling purpose) 1 | Table 3 shows the materials and its quantity needed in the experiment. We will write a custom essay sample on Lab Report Biology specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Lab Report Biology specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Lab Report Biology specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Method: 1. Prepare 3 different 500 ml beakers and label them A, B and C for different temperatures of water each. 2. Remove a goldfish from the tank carefully using a fishnet and place it inside a plastic zip-lock bag containing half filled water from the same tank. 3. Fill beaker A with about 450 ml of water of room temperature and place the plastic zip-lock bag containing the goldfish in it slowly. Let the goldfish adjust to the water temperature and observe its propeller movement which opens and closes in rhythm with the opening and closing of the mouth. 4. Insert a thermometer inside the plastic zip-lock bag to measure its temperature and record it in a table. 5. Start the stopwatch and count the number of propeller movements of the goldfish for 1 minute timeshare. Conduct 2 more trials and record them in the data collection table. 6. Next prepare beaker B containing water and adjust its temperature to 10 degrees below the room temperature measured earlier by adding crushed ice and stirring it for uniform temperature. 7. Again, slowly add the plastic zip-lock bag containing the goldfish into the beaker and let it adjust to the new surrounding enrapture. Using a thermometer, make sure that the temperature of water inside the plastic zip-lock bag has fallen 10 degrees under the room temperature. 8. Repeat step 5. 9. Lastly, prepare beaker C which contains hot water and adjust its temperature until it reaches 10 degrees above the initial room temperature. Stir the water using a glass rod to ensure uniform temperature throughout the beaker. 10. Place the plastic zip-lock bag with the goldfish in beaker C and let it adjust itself to the new temperature of water.

When in Doubt, Leave Scare Quotes Out

When in Doubt, Leave Scare Quotes Out When in Doubt, Leave Scare Quotes Out When in Doubt, Leave Scare Quotes Out By Mark Nichol When quotation marks are employed to suggest the irony or dubious validity of a word or phrase, or the writer’s remove from credit or blame for its use, they are called scare quotes. However, other uses- to introduce a new or unfamiliar term, to signal that a term is not being used in its traditional or literal sense, or to provide emphasis- are usually heavy-handed and seldom aid in clarity of composition. The sentences below, accompanied by discussions and revisions, provide examples of extraneous use of scare quotes. 1. Next, we will discuss the so-called â€Å"high-impact, low-likelihood† risks. The phrase so-called serves the same function as scare quotes, so using both in a sentence is redundant: â€Å"Next, we will discuss the so-called high-impact, low-likelihood risks.† However, be just as cautious in the use of so-called as in employment of scare quotes; the term is rarely useful and therefore unlikely to be necessary. In this case, it would be better to identify who characterizes the risks that way (â€Å"Next, we will discuss what John Smith calls high-impact, low-likelihood risks†), to use passive construction to soften the introduction by writing something like â€Å"Next, we will discuss what are called high-impact, low-likelihood risks,† or to omit any qualification at all: â€Å"Next, we will discuss the high-impact, low-likelihood risks.† 2. Risk management should be an embedded process that ultimately becomes part of the company’s â€Å"DNA.† Here, DNA is being used figuratively to refer to something that is a fundamental part of an organization, but the fact that it is not being employed literally does not justify scare quotes; the metaphorical use is clear: â€Å"Risk management should be an embedded process that ultimately becomes part of the company’s DNA.† 3. It is imperative to understand â€Å"what to do† as well as â€Å"what not to do.† Although the phrases â€Å"what to do† and â€Å"what not to do† are being presented as categorical concepts conceivably spoken or written as part of an effort to inform, this usage does not merit any emphasis: â€Å"It is imperative to understand what to do as well as what not to do.† Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Style category, check our popular posts, or choose a related post below:The Yiddish Handbook: 40 Words You Should KnowFive Spelling Rules for "Silent Final E"Supervise vs. Monitor

Cryptology Assignment Example | Topics and Well Written Essays - 2500 words

Cryptology - Assignment Example Hash functions are arguably the most important of all the encryption algorithms since they help in the prevention of external attacks. They are usually used in most of the applications that require very high security. They are also widely used in the specification of most communication protocols like IPsec and WAP. They typically serve message authentication codes and also help in provision of digital signatures or in some cases, they generate random numbers. MD5 and SHA-1 are the most common of the hash functions (Biham and Chen, 2004). MD5 Algorithm Data filling The MD5 algorithm usually adds the supplement immediately after inputting of the data thereby making the whole length of the mod 512=448. This can be represented as K*512+448 BITS WHERE K IS an integer. Add length Usually, a sixty four bit data b is used to dente the original length of the data while an independent b is used to two thirty two bit blocks. In the event that b>264, we will have to extend the length to multiple s of five hundred and twelve. This implies that the length will become times of sixteen double bytes. MD5 algorithm usually saves the data in an array. The syntax of such an array is given by M [0†¦N-1] Where N is in time of sixteen. Initialing of variables If four thirty two but variable named A, B, C, and D were to be defined, they would be initialized as A=0*01234567, B=0/889abcdef, C=0*fedcba98 and D=0*76543210. In this case, the data will be output in the same sequence that is, A, B, C, D. SHA-1 Algorithm This is also an important hash algorithm which is actually based on the MD4 principle. The algorithm actually produces 160 bit output which means that SHA-1 usually needs a set of five thirty two bit registers. However, the similarity between SHA-1 and MD5 is that both of them use a similar approach to message digesting. The SHA-1 algorithm has a total of four distinct rounds of iterative. Each of these rounds has its own twenty steps of operations. If you were to initial ize five variables namely A, B, C, D, and you would have:- A= 0x67452301 B=0xefcdab89 C=0x98badcfe D=0x10325476 E=0xc3d2e1f0 SHA-1 was traditionally thought to be the most secure hash algorithm and it is probably one of the main reasons why it is the current FIPS secure hash standard (Merkle,1990). Principle of operation of the two algorithms Generally the design of the hash algorithms is usually based on the Merkle-Damgard iterative structure. This is since the structure allows for arbitrary length in the messages that are sent. The hash algorithms typically work by dividing the input into different blocks of predetermined lengths. Each of the blocks that are formed is then affixed to the previous state using a form of a compression function in order to compute the updated state. This entire process is usually referred as chaining of a variable. After the processing of the message is completed, the output is given as the last step of the process. The state

Women in Mathematics, Science & Engineering Essay

Women in Mathematics, Science & Engineering - Essay Example Lewis (2011) documents 10 women who have made contributions to the field of mathematics for as early as 355 AD. These women include Hypatia of Alexandria (370 – 415 AD), a Greek philosopher, astronomer, mathematician, Elena Cornaro Piscopia (1646-1684) an Italian mathematician, theologian and Composer, Maria Agnesi (1718-1799) an Italian claimed to be the first woman university of mathematics. Others include,Sophie Germain (1776-1830) a French mathematician, Mary Fairfax Somerville (1780-1872) a Scottish and British mathematician also known as "Queen of Nineteenth Century Science," Ada Lovelace (1815-1852) a whose the Ada computer language after, Charlotte Angas Scott(1848-1931) an English, American mathematician and educator, Sofia Kovalevskaya (1850-1891) a Russian mathematician, Alicia Stott (1860-1940) an English mathematician and Amalie Emmy Noether (1882-1935) a German, Jewish, American mathematician (Etzkowitz, Kemelgor and Uzzi 45-100). Notably there are a number of wo men who have participated and made considerable contridutions in the field of sciences as early as the medieval age. Trotula di Ruggiero was the chair at the Medical School of Salerno in the 11th century. She has been credited in influential texts in obstetrics and gynecology (Leigh 65-80). Dorotea Bucca was also the chair of philosophy and medicine at the University of Bologna from 1390. Other women physicians from Italy included Abella, Jacobina Felicie, Alessandra Giliani, Rebecca de Guarna, Margarita, Mercuriade, Constance Calenda, and Calrice di Durisio among others. The participation and contribution of these Italian women physician was attributed to the liberal approach of the Italian Universities. Other notable achievements by women in science and physics in the nineteenth century include Florence Nightingale credited in pioneering nursing as a discipline; she was also a pioneer in public health and a statistician. Elizabeth Garrett Anderson was the first British woman with medical 1865. In America it was Elizabeth Blackwell. Astronomical photography was also pioneered by Annie Scott Dill Maunder. In the 20th century women notables in science include Marie Curie a Nobel price winner in Physics in 1903 (physics), and chemistry in 1911. In 1939, Lise Meitner credited for pioneering nuclear fission. Margaret Fountaine has made significant contributions in botany and entomology (Leigh 65-80). An analysis of female Nobel Prize laureates’ shows out of the fourty one women who have won the prestigious award between 1901 and 2010, sixteen of them have been in the field physics, chemistry, physiology or medicine (Ruth 100-150). Despite the above success stories there are several challenges that have inhibited women from pursuing Sciences and Mathematics. They include stereotypes, cultural practices, social prejudices, preferences and tastes, family orientation, the church etc. For instance St Thomas Aquinas was of the view that women were incapable of ho lding positions of authority, some cultures discourage women from participation in fields and activities regarded to as manly, some prejudices that a female is a weaker sex thus cannot comprehend technical aspects of science, there are workplace discrimination based on gender etc. (Ruth 100-150). 2.0 Challenges, issues and opportunities The issues of underrepresentation by women in sciences start early. In the US, girls account for athird of the students opting for physics at the high-school level. Those who secure placement in computer

Create an appropriate Essay Example | Topics and Well Written Essays - 750 words

Create an appropriate - Essay Example The term evidence refers to the act of proving that ones thinking or reasoning is not only correct but also sensible. It involves showing. therefore, in the context of one claiming to be knowing something, he or she should be able to provide adequate evidence about it what he or she claims to be knowing or else the claim that he or she has will only be looked upon has an statement with lack of fact in it or an opinion since that will only be considered as telling those involve what we think about (Ruggiero 1998). There are different kinds of evidence which include personal experience, which exist on our minds; the formal observation which involves detached observation whereby the observer does not participate but keeps a distance from the study and participant observation whereby the observer is directly involved and research review which is done one the already undertaken research by reviewers who summarize everything and compare their findings. There is great relationship between e vidence and opinion. An opinion is just but a mere statement from any persons point of view and therefore, in any case, for an opinion to be accepted and looked upon has correct, practical and worth being adopted, an evidence has to be provide to support that statement. Hence, a statement without evidence is an opinion but a statement with evidence is not an opinion. For example , if a father tells his son that he was a top achiever in academics during his time has a student, the child wont be satisfied with his fathers statement unless his father show him is academics reports showing his excellence (Ruggiero 1998). In this case, the father is giving a statement which remains to be an opinion in which the child may either agree with it or not but in the case of the providing evidence, which will be the report of his academic achievements, the child with the will automatically accept and acknowledge the fact and will he will definitely work hard to be like his father. Therefore, evid ence and opinion are closely related in terms of establishing the reality, acceptability and the truth. Opinion is therefore of greater value in terms of laying a platform for the provision of the evidence and finally at justifying that one knows (Ruggiero 1998). With regard to knowing, evidence plays a very critical and important role towards justify the fact a person knows some. One is said to know only after providing evidence which could be through the act of explaining what he or she says that he or she knows, through demonstrating, through replicating an acting and so on and all this are what are equated to the term evidence. For instance, when one claims to be knowing the spelling of the word embarrass he as to support his statement by giving an evidence which is the correct spelling of that very word without failure. Evidence provision is at times problematic due to the fact that opinions are not based on anything substantial and there are also different types of evidence wi n which in the case of presentation the receiver may not be aware of all of them which may cause a dispute. Therefore, in the presentation of the evidence, the presenter is required to be well

Auto Cad And STAAD Pro

Auto Cad And STAAD Pro This chapter gives an insight into the topics involved in this dissertation, it starts with a review of the key items involved to complete this project such as the programs used to design and analyze the structure as in Auto cad, and STAAD pro. The chapter further develops in reviewing the euro codes in which the building will be designed to. Auto Cad This is a design and documentation software program that was founded in 1982, 28years ago. It is the most commonly used piece of software of its kind and it is constantly being enhanced and improving its software to meet the current needs of its users. It is used for drawing objects to a very high degree of precision in either 2D or 3D format using polar coordinates. Almost any object conceivable like the 3D model shown in figure 2.7 can be produced on todays Auto cad thanks to its extensive array of tools and when trained, easy to use interface. Its tool base may be used in both the 2D and 3D formats, some of the basic tools include, line, circle, arc, break, extend, mirror and copy. These are only a small fraction of the features of Auto cad, which make it possible to create and change or redesign models of any shape and complexity, in a relatively short period of time as compared to drawing by hand or using other software programs such as STAAD pro. This is the reason why auto cad was used to detail the design rather than STAAD pro because of its ease of use and the complexity of the design and then inputted into the STAAD pro software for the analysis. STAAD Pro This is a finite element analysis and design software program run on windows operating systems, which is used to analyse the structural stability of structures, under a variety of conditions. It allows the users to effectively analyse structures built from a number of different materials such as, timber, concrete, aluminium and steel, under different forces caused by, earthquake, soil interaction, and various dead loads and live loads, which are specified by the local design codes being used in whatever location the structure is being design, in this case Eurocodes. It is a very versatile piece of software that has being perfected over the past 25 years, it reduces the amount of man hours required to correctly analyse how a structure will behave when loaded using either 2D/3D model generation. The general steps involved in producing a successful model are as follows: Model generation: creating the structure model in either 2D or 3D which could involve importing an Auto Cad files and then choosing the material type and size for the members, applying a foundation types to correct locations and specifying loads and forces on the model. Calculations:-to obtain the analytical results. Code check:- creating parameters for design specification Running analysis:-to perform analysis and design. Verification of results:-displayed through graphs, diagrams and tables. Reporting and printing. Eurocodes: This chapter is intended to provide a brief introduction into the eurocodes. It will list the benefits, the problems, associated with the codes. It describes the general layout of the codes and discusses the difficulties with the drafting of the codes and how the difficulties were resolved, the national annex and their roles will also be discussed. It will advance to describe in detail to list the difference between the previous BS 8110 and the contents of Part 1.1 of Eurocode 2, which has superseded the above British standard. And will be the main eurocode used to design this concrete structure. The eurocodes are set of ten codes of practice for the design of building and civil engineering structures in concrete, steel, timber, masonry other building materials Table 2.1 lists these eurocode there titles and reference numbers. Similar to the previous codes of practice the British standards these codes come in a number of different parts, each containing different rules to the design of the different structures included in the codes. Table 2.1 EN1991 provides the characteristic values of the loads or actions as termed in the code, needed for the design. It is the head code of the world fist material independent design code providing guidance on determining the design value of actions and combination of actions, including partial safety factors for the actions. EN 1997 covers the foundation design with respect to the geotechnical side. EN1998 is devoted to the seismic design and provides guidance on achieving earthquake resistance in buildings and structures. These Eurocodes will have the same legal standing as the previous British standards and other approved documents. These codes were published first as preliminary standards; know as ENV (Norme Vornorme Europeenne), in the beginning of 1992. Now after being revised reissued as European standards, known as EN (Norme Europeenne), along with national annex which contains supplementary information, are coinciding with British standards but will eventually become mandatory and all conflicting standards will be withdrawn as in the British standards. Benefits of Eurocodes. There are many advantages of having design standards which are accepted by all member states how ever this is not a new initiative as the first draft Eurocode 2 for concrete structures was based on the CEB (Comite Europeen du Beton) Model Code of 1978 produced by a number of experts from various European countries, similarly Eurocode 3 was based on the 1977 Recommendations for design of steel structures published by ECCS (European Conventional for Constructional Steelwork). The original reason for this work was to improve the science of structural design. Recently though the drive is for political and economic unification of countries and these Eurocodes will help to lower the trade restrictions and barriers which exist between member states and allow for contractors and consultants to compete freely and fairly for work within Europe. Also the unification will enable products, materials, components, design programs to be marketed throughout member states. It will also improve interna tional standing of European engineers which should help in increasing their chances of wining work abroad. Prooduction of Eurocodes: Each Eurocode has been drafted by a team of experts from different member states. These groups are under contract to the CEN (Comite Europeen de Normalisation), the European standards organisation, whose members are the national standards bodies as in the British Standards Institute in the UK. During the ENV stage of production a liaision engineer from each member state was involved in evaluating the final document and discussing with the drafting team the acceptability of the eurocode in relation to the previous national code. Format of Codes: Problems associated with drafting the Eurocodes. There were many problems faced when the Eurocodes were being drafted mainly being the terminology that was to be used, different climate conditions, materials and different work practices from the different member states. The following details outline ways in which these problems were overcome. Terminology From the beginning it was inevitable that the terminology would have to be standardised in general the agreed terminology was found to be similar to that used in the UK national standards. The few minor differences include loads are now called actions while dead loads live loads are now referred to as permanent and variable actions respectively. Similarly bending moments axial loads are now called internal moments and internal forces respectively. Principles Application Rules This was the method used to divide the documents into sections ensuring documents were concise, described the overall aims of the design provided specific guidance as to how these aims can be achieved in practice. Principles comprise of general statements, definitions, requirements and models for which no alteration is allowed. Application Rules are generally recognised rules which follow the statements satisfy the requirements given in the principles. When the letter P is missing from the clause number it indicates an application rule. The use of alternate rules other than that in the eurocodes is permitted as long as hey do not effect the design requirements and are at least equivalent to those suggested. National Annexes Differences in work practices, climate conditions etc required the allowance for different parameters to be determined and specified at a national level such as safety factors, cover particular methods of construction etc. where these deviations are allowed a note in the code is provided in the accompanying annex, these parameters are know as NDPs (Nationally Determined Parameters). Eurocodes 2: Design of concrete structures. This will be the main Eurocode used to design this structure as the build will be mainly concrete this code is to replace the previous code of practice BS8110 and it is the European standard for the design of buildings in concrete, although the ultimate aim of Eurocode 2 and BS 8110 is largely the same to provide guidance on the design of buildings and civil engineering works in concrete, there are many new design procedures and differences, it is based on a limit state principles and comes in four parts as shown below in table 2.3 Liquid retaining containment structures Part 1.1 of Eurocode 2gives a general basis for design of structures and some detailing rules very similar to the previous BS8110, the design cannot not be completed without using reference to other documents such as EN 1990 (Eurocode 0) and Eurocode 1 to determine design values of actions (loads), Part 1.2 of Eurocode 2 for fire design, EN 206 for durability design Eurocode 7 for foundation design. The reason for this difference in structure and layout is to make the eurocodes more concise than BS 8110 and avoid repetition. Proposed Design: In the design process a number of different designs were considered and working with the requirements of the structure the most suitable one was chosen these requirements were as follows: Design a suitable multi-storey building containing retail units and accommodation units. The structure should be designed and built to modern codes of practice and standards. The building must be of modern aesthetics and be unique to surrounding buildings. Also the structure should fit the following criteria: Retail Floor Space ; between 1500 4000m2 Accommodation Space ; between 10000 30000m2 Maximum Footprint ; between 1500 3500m2 Maximum Height of Building; 40m. The following designs were considered and compared when choosing the final design. Proposal One; Retail space = 3161m2 Accommodation space = 11718m2 Footprint = 3161m2 Provision for lateral stability and vertically stability is provided by concrete columns and shear walls/shear cores within the structure. Proposal Two; Retail space = 2001m2 Accommodation space = 11674m2 Footprint = 2001m2 Provision for lateral stability and vertically stability is provided by concrete columns and shear walls/shear cores within the structure. Proposal Three; Retail space = 1558m2 Accommodation space = 28451m2 Footprint = 1558m2 Provision for lateral stability and vertically stability is provided by concrete columns and shear walls/shear cores within the structure. Chosen design: The design in proposal two was chosen finally because when it was compared with the other designs it was decided that it was more astethic than proposal three because of its falling design, it was then compared with design one and it was not considered to be more asthetic but it did accomodate the footprint requirments and space requirments better than proposal one did. Materials Methods: Elevator Elevator Shaft; The elevator shaft will provide latheral stability for the building and will direct forces into the ground, it will span from the base to the roof in each of the four shafts. There will be four elevator shafts positioned in the centre of each external face of the building, providing ease of acess to each floor. Each one will be of dimensions 3 x 2m and will utilise a electric cable borne method for lifting and will travel at a max speed of 2.5m/s. Each elevator will be able to accomondate a max of 10 peolple at a time. Latheral Stability: The elevator shafts incorporadted in this design provide for latheral stability caused by wind loads, these loads are created by the wind force on acting on the external face of the building transmiting the loads to the floor, these floors form horizontal diaghragms transfering the latheral load to the vertical rigid elevator shaft which acts as a vertical cantillever and subsequently transfers the loads to the foundations. The advantage of using the elevator shaft to provide lateral stability is that concrete walls tend to be thiner than other bracing systems used in medium sized multistorey construction and so save space in congested areas also they are very rigid and may be used as fire compartment walls, the disadvantge of using the elevator shaft for latheral stability is that construction is slower and less accurate and when constructed they are not easily modified, also it is difficult to provide connection between steel and concrete. Procedure STAAD Pro 1.1 Importing drawing Now that both the model had being created and the loads calculated, it was now time for the analysis of the model. To achieve this, first the model had to be imported into STAAD pro, this was done by saving the model in Auto cad as a R12/LT2 DXF file, which is compatible with STAAD pro, and then opening a new structure sheet in STAAD pro and using the import function located in the file drop down menu. When importing the file the following two pop up windows will appear shown in figure1.1 and figure 1.2, these let you define the orientation and units you want to analyse your model in. For the structure model meters and kilo Newton were chosen with a standard orientation of the Y axis pointing upward. After that the model will appear on the main STAAD Pro interface as shown in figure 1.3. As can be seen from figure 1.3, STAAD Pro has a vast array of tools and functions that make it possible not only to, analyse almost any structure in almost any situation, but also to draw structures. For simple structures it would be worth while using STAAD Pro, however for more complicated structures it is better to use Auto cad, because it is specifically tailored for drawing almost any structure or object with ease, for the trained user. Now that the model was now in STAAD pro, it was now time to proceed with further developing the model for analysis. On the left hand side of the main window containing the model, there is a tool bar called modelling, this toolbar contains functions for modifying the model, like design, support, general, load, material etc. 1.2 Adding supports For the model, supports were required at every base node position. To achieve this, the support window was selected from the general toolbar, figure 7.5 shows the window that pops up for adding support to your structure. For this model fiixed support was required so the create button was selected, and fixed support in the sub menu was chosen as shown in figure 1.4. Now that the option for fixed support was now in our main support window, it was now time to apply the support. STAAD pro gives you a number of different options of assigning the support, like, assign to view, use cursor to assign and assign to edit list, and assign to select nodes. First the node function was selected from the cursor toolbar as shown in figure 1.6, this option allows you only to selected nodes and not beams. When this was done, the bottom layer of nodes on the model, were select and the assign to selected nodes function was used. Now fixed support were applied to the model in the correct position as shown in figure 1.7, and it was time to proceed with the next step. 7.3 Member selection From the general toolbar, the properties window was selected. From here you can assign any style of member in accordance with many different regions building codes using the section database function, and apply any number of different sections to different members in the same model. You may also design the dimensions as in this case a 300mm by 280mm rectangular concrete section was chosen for the beam and a 300mm by 300mm concrete section for the column was detailed. Once selected, the section chosen appears in the properties window, and from here you are given the same option as applying support i.e. (assign to view, use cursor to assign and assign to edit list, and assign to select beams). First the beam function from the cursor toolbar was chosen, this allows you to only select beams and not nodes. Then the columns were assigned using the same process with the different section assigned, figure 1.9 shows the model with the beams and columns applied. Now that this was completed it was now time to move on to applying the various loads to the model. 7.4 Applying loads Loads are used to estimate how a structure will behave if constructed. Since the loads had being previous calculated with the aid of eourcodes, it was now possible to apply them to the structure. In the general toolbar, the load window was selected, from here all types of load may be applied to the structure, for the dome the loads calculated were, dead load, live load, and wind load. From the load window, the load cases icon was selected, a pop up window as shown in figure 1.10 was activated. From here all the three types of loads were identified and added to the main load window. Each load name was then picked individually by used of a pop up window known as load items which is shown in figure 1.11 and the specific load applied. Now that the loads had being picked and values assigned to them in the appropriate direction, it was now time to apply the loads to the model. In the load window the same options exist as for the support and properties window for applying items to the model, for the dead and imposed load, the assign to view function was used. For the wind load only the side facing the wind is loaded, so the node cursor was selected from the cursor toolbar and all the nodes on wind facing side of the structure was selected as shown in figure 1.12. 7.5 Running analyse First the analysis/print toolbar was selected from the modelling menu, which resulted in two windows being activated, the print analysis commands window and analysis whole structure window, which are shown in figure 1.13. In the analysis commands window the no print option was selected and added to the analysis whole structure window, which shows the processes involved in the analysis. After this was completed the analyse toolbar located at the top of the user face was selected, and the run analyse option selected as shown circled in red in figure 1.14. After the analysis in completed a window the STAAD analysis and design window shows the processes carried out and whether there are any errors or warnings related to the model. Any problems relating to the model may be checked by selecting the errors or warning in the window, and the exact problems with the members they are related to, will be displayed. Figure 7.15, shows the final analysis of the dome model which took 16 seconds with no errors or warnings, after all the errors and warnings were corrected. 7.6 Post processing On the bottom left of the STAAD analysis and design window, there is a set of options on where to go after the analysis, the go to Post Processing Mode option was selected and done button pressed. Form here, the post processing window as shown in figure 7.16 the results of the analysis may be viewed for both the beams and the nodes. Graphs and reaction tables along with visual representation can be viewed for the nodes, showing things like the max displacement of a node. Stresses, graphs and forces can be viewed for beams showing such things as max axial forces, max bending, max shear and max stresses. 7.7 Producing reports The number of results including structure type, No. of nodes, No of members etc can be put into a report format. This is a useful tool for an engineer to document any findings to produce to clients or planners, an example of a node report for the dome is shown in figure 1.17.

Free Glass Menagerie Essays: Realism :: Glass Menagerie essays

The Realistic Feel of The Glass Menagerie Tom Williams in the play The Glass Menagerie writes about a time when his family struggles.   Many people can relate their problems one way or another with Williams.   Though the play had a very realistic feel to it, many people enjoy fairytale endings. The play is very well written, but I would change the ending.  Ã‚   The ending was depressing.  Ã‚   The whole family worked so hard on preparing for the gentleman caller.   Amanda, Tom's mother completely redecorated their home and picked out beautiful clothes for Laura and herself.   The whole play led up to this moment, of Laura meeting a nice gentleman caller.   Conveniently it was the boy she had a crush on all through high school.  Ã‚   Whom, she always fantasized about being with.   At first it seemed he was interested in her also.   They should have had him and Laura become romantically involved.   Eventually get married and have kids.   This would have been a much happier ending.   Not only would Laura be happy, but Amanda and Tom would be too.   Amanda would finally not have to worry about her daughter anymore, because she would be taken care of.   Tom would be happy because he too, would no longer have to worry about his sister.   This is more l ike a fairy tale ending, but it would have been much more interesting and inspiring if Laura did become married to the gentlemen caller.   Laura had such a rough time with her life, this would have given her hope that she never had. The entire play is a family struggling which can be compared to many of our own lives.   The play isn't fantasy like at all.   It is realistic, and that's what is good about it.   Tom was struggling to taking care of his mother and sister, which can be compared, to the way families live today.   Laura is disabled and very insecure of it.   Amanda is just like any mother, she tries hard to help her children have a secure future.   Another hardship for Tom and his family is that their father is no longer in the picture.   He abandoned the children at a very young age.   These examples can be compared to our own lives.   Instead of the play being about people with no problems, it's about "real people."   Everyone has problems and struggles, maybe not exactly as Tom's family does, but we can relate with similar problems.