Tropic of Cancer Review Essay Example

Tropic of Cancer Review Paper Essay on Tropic of Cancer Tropic of Cancer a unique book. It attracts and repels at the same time, causes wrinkling in disgust and reread some pages over and over again. The book is difficult. I know people who simply could not read it. . Abomination I only lasted for the first 20 pages, they said. In fact, if you can not ignore the written, read between the lines and, as they say, to mature to the root, it is better, perhaps, not to take up this book. But those who still want to try, I can give some advice, which I hope will facilitate the task. First, start reading, it should be remembered that the Tropic of Cancer a modernism, and the main rule here the absence of any rules. In this book, Miller, as did Joyce in Ulysses, allowed himself to all. As with most products of modernity, everything is concentrated on the inner world of man, the external facts and circumstances are not important. Do not try to establish a clear chronology of events there is none. Do not ask yourself questions like, Why did he say that?, Why did he do that?. Even the Henry Joe Miller in the novel would not respond to them. Tropic of Cancer a book-emotion. It does not need to understand and feel. Disconnect rational, let your mind responds to read spontaneously form We will write a custom essay sample on Tropic of Cancer Review specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Tropic of Cancer Review specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Tropic of Cancer Review specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Tropic of Cancer. autobiographical book. Most of the events described in it happened to the author really. Here we see all the same search creative artist, described in more than one hundred books. However, as shown in Tropic of Cancer truly deserves attention. Then, in the thirties of the XX century, rarely seen on the pages of a book in Paris. Miller reveals, so to speak, from the inside bohemia, Notre Dame through the eyes of rats living in it. Yet Paris has Paris, and even the skeptics and cynics Miller fails to overcome its majesty and charm. Those places in the book where the author gives in the magical power of the city, a truly fascinating and reveal another facet of Millers personality -. Poetic facet Turning the last page of the book, I was surprised to find that I can not think of a hero, any event. However, my mind settled something more a sense of beauty. Yes, after all the mud, which is poured out at me from the pages of the book, this feeling seems paradoxical. But perhaps this is the genius of the author.

DNA Structure Essays - DNA, RNA, Genetics, Nucleobases, Free Essays

DNA Structure Essays - DNA, RNA, Genetics, Nucleobases, Free Essays DNA Structure DNA is a double stranded molecule twisted into a helix. Each spiraling strand is comprised of a sugar phosphate backbone and attached bases connected to a complimentary strand. The complimentary strand is connected by non-covalent hydrogen bonding between paired bases. The bases are adenine, thymine, ctyosine, and gaunine. The fundamental building block of DNA is the nucleotide. The nucleotide has three parts. A nitrogen-containing pyrimidine or purine base, a deoxyribose sugar, and a phosphate group that acts as a bridge between the deoxyribose sugars that are adjacent to it. Each deoxyribose sugar contains five carbon atoms joined to an oxygen atom. The carbon atoms are sequentially numbered from 1-5. Each is considered a prime and is labeled such as this: 1'. The first carbon atom is the carbon atom covalently attached to one of the four bases. Guanine and adenenine are purines and cytosine and thymine are pyrymidines. The phosphate groups are attached to the (3') third and (5') fifth carbon atoms. When speaking of DNA the term nucleotide refers to the complete assembly of a nitrogenous base, a five carbon deoxyribose sugar, and a phosphate group. A DNA molecule is composed of two unbranched polynucleotide chains that wind about each other into a structure called a double helix. Each revolution is 34 A, there are ten base pairs in each revolution. The structure of DNA is an advantage because of it's simplicity. This structure lessens the chance of mutation during replication. Robert D. Stewart, Ph.D. A Few Words About DNA and Chromatin Dosimetry research and Technology (DRT) Group K3-55 Pacific Northwest National Laboratory (PNNL)

'The stoning of Soraya m.' movie review Example | Topics and Well Written Essays - 500 words

'The stoning of Soraya m.' - Movie Review Example The stoning of Soraya tells a true story about victims of stoning in modern Iran. The story is deeply moving, and if one watches this film, he will never forget Soraya. The main protagonist is a journalist who gets lost in the small village when his car stalls. He is approached by a woman called Zahra who narrates with great sorrow the stoning of her niece, Soraya, the previous day. In the movie, a lot of positive changes can be seen as regarding the general Hollywood theme of damsel in distress, who gets rescued. The end of the movie is bittersweet. In the end, Soraya still gets stoned and dies a bloody death. However, women are strongly portrayed as being very strong in this film. This is demonstrated by the zeal with which Soraya’s aunt, Zahra, fights the local authorities and other opposing forces to ensure that the story of her nieces stoning is told to the rest of the world. She is also very daring and this is illustrated when she slaps the village chief. The good thing about this kind of portrayal is that it changes people’s perception about Muslim women. While most films always portray them as weak and voiceless, this film shows their strength and endurance. Soraya shows great courage even in the face of great injustice. She does not scream out that she is innocent because she knows it is a futile thing to do. Instead, she calmly addresses the crowd and then takes what comes with dignity. Her aunt also shows great strength because of the things she endures to ensure her niece gets justice. Not only does she have to face death threats several times, she hides the original tape of the happenings and ensures the journalist gets it in the end. This movie portrays a society in which the men use religion to peddle lies and to oppress women. In most instances, people have termed Islam as a bad religion because of such practices. Not so with the stoning of soraya. This movie

All Quiet On the Western Front Assignment- Close Reading Essay

All Quiet On the Western Front Assignment- Close Reading - Essay Example The story concludes with Paul’s death at the hands of a French sniper on a day near the end of the war. This book is not written by a military general, a politician, a hired ghost writer, a professional historian, but a common solider that has deep respect for human values. He writes without any hidden agenda. Though Paul and his friends joined the army charged with patriotism and with high expectations, soon the brutalities and other realities of war disenchanted them. The captioned pages elaborate the realities of war. In this short passage, the author has provided everything as to how a good books needs to be written. The original company of 150 men of which he has described is a mini-war front, and the description of the sufferings of the individual soldiers is moving. Paul writes about the life of a soldier and how he learns to disengage oneself from human emotions like fear, love and sympathy and turn almost cynical. Not the actual war, but the aftermath of the war worri es Paul. In the above scene, the members of the Second Company, a unit of German army men fighting during World War I, are resting to enjoy a short reprieve from active duty in the warfront. They have suffered heavy casualties, only eighty have returned from the original strength of 150. Paul gives an admirable description about the soldiers and the literary talents of the author are showing. Tjadenis a glutton, but his body is wiry, Haie Westhus, with a heavy body, Detgering who always things about his wife at home, Katczinsky, the cunning old man and the experienced one, and the unwilling cook, who goes by the rule-book of the army to issue rations. The genius of the author is showing throughout their conversation. The passages above highlight the main themes of the novel: How an ordinary soldier is impacted by the horrors of war. The usual features with the war novels are romance, valour, and heroism in the battlefield. But Paul describes about the

A Monologue for Love Essay Example for Free

A Monologue for Love Essay What becomes of the broken hearted? Nothing. You think you know love then that love turns out to be an egotistical self-involved bastard whos no braver than the house mouse living in your walls waiting til you least expect it. Ive made mistakes before. But nothing compares to the ones made with him. The ones made in his arms, his unloving false arms embrace that somehow once made me feel warm and made heart be tender. And in that false embrace I made mistakes under false illusions. Illusions that this.. boy, this child, could love me and make me feel like a woman! A woman I am not, I am but a child, a girl who has been broken by the same boy too many times and more. I tried to end it once, twice, and ended it be on the fifth. But this was all too little too late, as he had touched me and I him. And is it so much to ask that I be loved again? It must have been for once another man loved me A man this time. Not a child, a boy. A man. And this man I turned down. I gave him false reason. For the real reason was that I did wish to be with this man but I was too afraid. The fear growing inside of me, a seed planted by a boy. And in the heat of the moment I fell for that man only to wake the morrow to tell him it cannot be. Months later now, I thought I had convinced myself of this false reason. But in a moment of peace, no distractions to cloud my judgment, my heart caught up to my head and told me of the real reason. And now I am dead. The seed has stopped growing. But its venomous flower has already bloomed and done its damage. I am but one of many broken hearted souls with many mistakes done and many more to proceed, to follow. And I ask of you now What should a girl do? When she no longer welcomes love But instead wishes it she had never known?

Simulation of the ALOHA protocol

Simulation of the ALOHA protocol Abstract-The present essay is a tutorial on the OMNeT++ simulation environment, through the analysis of the known ALOHA protocol. The model implements the ALOHA random access protocol on the Link layer, and simulates a host to server instant broadcast. ALOHA is rather simple yet convenient to demonstrate the potential of OMNeT++ in simulating wireless protocols. The final part evaluates the pure and the slotted ALOHA variations, in regard to the theoretical models. Introduction OMNeT++ is a discrete event simulation (DES) environment, developed by Andras Varga as public source, and is accompanied by Academic Public License, which means that it is free for nonprofit academic use. The intention behind OMNeT++ was the development of an open source generic simulation environment, not exclusively dedicated to network simulations as the more known ns-2, or the commercial Opnet. The environment offers instead, a generic and flexible platform to develop simulation frameworks dedicated to complex IT systems, as wireless and sensor networks, the classic IP and IPv6 stacks, queuing networks, optical networks and various hardware architectures. Typical example of a framework that provides simulation components for IP, TCP, UDP, Ethernet and MPLS, is the INET Framework and the MiXiM, which is an aggregation of several frameworks for mobile and wireless simulations. The OMNeT++ ver. 4.0 is built on the known Eclipse CDT ver. 5.0, and uses most of its resources. It is offered for Windows and Linux operating systems. The core of the models is coded in C++, in Linux uses the gcc compiler and in Windows uses the MinGW port for the gcc suite. There is a commercial version called OMNEST, with no significant accessories than the open version, except the optional use of the native Visual C++ compiler for the Windows platform. The ALOHA protocol was one of the oldest random access protocols, invented by Norm Abramson in 1969. The first wireless network, implementing packet switching over radio, used the pure ALOHA variation, have initially established in Hawaii. Later Abramson interfaced the ALOHAnet with the ARPAnet, the primitive form of internet. The ALOHA have inspired the creation of CSMA/CD and the birth of Ethernet. Finally, the random access protocol has evolved to contemporary CSMA/CA, the MAC layer of Wi-Fi. The slotted ALOHA and the later pure ALOHA have simple implementations, appropriate for simulation. It uses only the host to server broadcast instant, but is adequate to calculate the maximum channel capacity and demonstrate some other interesting attributes, as well. OMNeT++ DESCRIPTION The Structure of Models OMNeT++ is based on C++ programming and follows the object-oriented approach with classes and class instances, the so-called objects. The simulation model consists of modules, which communicate by message passing. The core element is the simple module, which is written in C++, and constitutes an instance of a module type from the simulation class library. The next structural element in the hierarchy is the compound model, which is formed from simple modules or other compound models. Every module, simple or compound, has ports to communicate with the external environment, called gates. Gates could be bidirectional or could be restricted to input or output. Modules are connected through their gates via connections and they communicate by exchanging messages, via these connections. The block diagram in Fig. 1 depicts the internal module structure according to the declared hierarchy, in OMNeT++. The connections are limited within the module range but the message exchange can be established across hierarchy levels. This is applicable in the case of modeling wireless systems and the simulation of ALOHA stations will make use of it. Otherwise, messages are traveling through the chain of connections. Modules have parameters, which are used to pass initialization data during the initiation of the simulation. The compound models can pass parameters to the contained sub-modules. The final model which contains the aggregate of the modules is called network model, is represented as a class and each simulation run is executed on an instance of this class. The NED language The structure of the simulation in OMNeT++ is based on the network description language (NED). The NED includes declarations for the simple modules and definitions for the compound modules and the network model. The language programming is accomplished by the integrated graphic editor, as shown in Fig. 2 or the text editor, as shown in Fig. 3. Both editors are producing equivalent code, and the programmer can switch from one another without any derogation. The programming model The typical code development includes the following steps: The programmer creates the network model, by creating the appropriate network_name.ned file, using the IDE. The NED file describes the network name and the topology, which are the names of the sub-modules, simples and compounds. Every sub-module should have its own module_name.ned file, which includes the parameter declarations and other meta-data. As mentioned, the behavior of every simple module is expressed in C++, so there should be two specific files, the module_name.cc and the module_name.h, for every simple module. These files are compiled during simulation execution by the supporting C++ compiler, and linked with the simulation kernel and libraries. The programmer usually tests the behavior of the simulation model according to different inputs. These could be entered manually by the user, during simulation execution, or could be included in a configuration file. Generally, there is a special type of file the omnetpp.ini that contains these parameters and the rest of the building blocks, to support user interaction. The IDE includes an editor for the initialization files, which can switch between form view, as shown in Fig. 4, and source view, as shown in Fig. 5. The two fields are equivalent. There are two fundamental methods to develop C++ code for programming the simple module behavior: The co-routine based and the event processing function. In the first approach, every module executes its own threat of code, which is activated every time it receives a message from the simulation kernel. In the last approach, the simulation kernel calls the module function, having the specific message as argument. Prior to main() function execution, an initialization function declares variables and objects and before program termination, a finalization function saves the data logged during simulation, and produces histograms. OMNeT++ Architecture and Potentiality The following Fig. 6 presents the internal logic structure of OMNeT++. The first block is the model component library, which the programmer develops in C++, and contains the compiled code of simple and compound modules. The simulation kernel and the class library (SIM) instantiates the modules and build the concrete simulation model. The user interface libraries (Envir and Cmdenv or Tkenv) provide the simulation environment, which defines the source of input data, the sink of simulation results and the debugging information. It controls the simulation execution, visualization and animation. Cmdenv provides only command line and text mode input-output, and it is more appropriate for batch simulations. Tkenv is the graphical user interface (GUI) of OMNeT++. It provides automatic animation, module output windows and object inspectors. The following Fig. 7 depicts an active simulation output through OMNeT++/Tkenv. OMNeT++ includes very powerful tools to visualize the interaction among modules. A sequence chart diagram provides a way to inspect the timing of the events during simulation by extracting data from an event log file. During the finalization routine, the logged data are saved to specific result files, the vectors in network_name.vec and the scalars in network_name.sca files, respectively. For the result analysis, OMNeT++ produces the analysis file network_name.anf, which contains aggregated data in vectors and scalars plus any histograms, created during the final stage. All the types of data can be further processed by using pattern rules, in datasets and charts section, to produced advanced charts and graphs. In the ALOHA simulation most of the available choices are used for demonstration. Aloha Simulation Background Theory The slotted ALOHA is the most simple random access protocol. The transmitting station always broadcasts at the full rate R of the channel. The transmission initiates at the beginning of the slot, which is common for the aggregate of the stations. If two or more stations transmit simultaneously, then the condition is called collision and all the stations involved, after a random time different for each, retransmit the frame until successful delivery. The procedure is presented at the following figure: The slotted ALOHA protocol allows each station to transmitat at the channels full speed R, but requires slots to be synchronized in all the stations, something not nessesary for the unslotted or pure ALOHA. The following assumtions are made to simplify simulation: The source generates single frames of length L bits. The inter-arrival times between frames follow exponential distribution. If R bps is the capacity of the wireless link then the slot time is set equal to the transmission time of each frame, which is: tframe=LR sec. All nodes are synchronized and transmit frames only at the beginning of a slot. If a node has a new frame to send, it waits until the beginning of the next slot. If two or more frames collide, then their hosts retransmit after random time, following exponential distribution. If there is no collision, then the node transmits its next frame following exponential distribution. I define N the number of stations operating the slotted ALOHA protocol and p the probability of each station to transmit in the next slot. The probability for the same station to do not transmit in the next slot is then 1-p, and for the rest of the stations is 1-pN-1. Therefore, the probability for a station to have a successful transmission during the next slot is to transmit and the rest of the stations to do not transmit, so it is p1-pN-1, and because there are N stations, the probability that an arbitrary node has a successful transmission is Np1-pN-1. A slot where a single station transmits is called a successful slot. The efficiency of slotted ALOHA is defined as the long run fraction of successful slots, which is: Ep=Np1-pN-1 (1) To find the maximum efficiency, we seek p* that maximizes (1). Then: Ep=N1-pN-1-NpN-11-pN-2=N1-pN-21-p-pN-1 If Ep=0 then p*=1N . Using this value, the maximum efficiency is: Ep*=N1N1-1NN-1=1-1NN-1=1-1NN1-1N (2) For a large number of active stations, the maximum efficiency accrues from (2) as N approaches infinity: limNEp*=limN1-1NNlimN1-1N=1e1=1e=0.368 (3) From (3), the maximum efficiency of slotted ALOHA is 0.368 or 36.8% The unslotted version or pure ALOHA protocol does not have the restriction of slot synchronizing, and the station is able to broadcast when a new frame is available. So pure ALOHA is a full-decentralized random access protocol. When a transmitting station detects a collision, after completing the transmission, it retransmits the frame with probability p. If it chooses to postpone the transmission for a single frame transmission period tframe=LR sec, then the probability is (1-p). The figure below depicts transmissions and collisions in the unslotted channel. The maximum efficiency of pure ALOHA protocol is calculated similarly as the slotted ALOHA. The only difference here is that the rest of the stations should have not begun transmitting before and should not begin during the broadcast of the given station. The probability that the rest of the stations remain idle is 1-pN-1 and the probability that they remain idle is 1-pN-1 again. Therefore, the probability that the given station will have a successful transmission is p1-p2N-1. Again, we seek the value of p* that maximizes (4), which is the probability of successful transmission for the sum of the N stations. Ep=Np1-p2N-1 (4) Ep=N1-p2N-2-Np2N-11-p2N-3=N1-p2N-31-p-p2N-1 If Ep=0 then p*=12N-1 . Using this value the maximum efficiency is: Ep*=N2N-11-12N-12N-1 (5) From (5), the maximum efficiency accrues as N approaches infinity, which is: limNEp*=121e=12e (6) From (6) I assume that the maximum efficiency, for the pure ALOHA protocol, is 0.184 or 18.39%, the half of slotted ALOHA. Another useful diagram is in Fig. 10. It depicts the apparent superiority of slotted ALOHA over the pure ALOHA protocol, despite the limitations that turn it to non-functional. The normalized total traffic is the aggregate traffic, which generated by the source of the station, divided by the channel capacity R and the normalized throughput ? is the average successful traffic (non-collided) divided by R. The slotted ALOHA achieves double throughput than the pure ALOHA and achieves its maximum efficiency when the generated traffic rate equals the channels capacity R. The pure ALOHA although, achieves its maximum efficiency when the generated traffic equals to R/2. Model Development NED language The following paragraphs describe the process of creating a functional model for the simulation of ALOHA protocol in OMNeT++. The object of simulation is to study the behavior of the ALOHA model and to confirm the theoretical values of maximum efficiency for pure and slotted ALOHA. The ALOHA random access protocol is peer based and does not use a server-client architecture. It is convenient to study the effect of collisions and random retransmissions only in the case when one host is receiving (becomes server) and the rest of the hosts are transmitting. The first step is to develop the NED code that describes the network Aloha. The following Aloha.ned file creates the Aloha network, which consist of simple modules, one called server and a number of hosts, equal to numHosts parameter. The txRate defines the transmission rate R, of the wireless channel, and slotTime defines the type of protocol. Zero means pure ALOHA and 100ms defines the slot time length. The parameter @display selects a background image, taken from the library. network Aloha { parameters: int numHosts; // number of hosts double txRate @unit(bps); // transmission rate double slotTime @unit(ms);// zero means no slots (pure Aloha) @display(bgi=background/terrain); submodules: server: Server; host[numHosts]: Host { txRate = txRate; slotTime = slotTime; } } The following Server.ned file describes the servers simple module. It loads an image for the server icon and defines a gate of input type (in), with which it is not necessary to establish a connection. It can receive a message directly from a host via @directIn, something that is usual to wireless simulations. simple Server { parameters: @display(i=device/antennatower_l); gates: input in @directIn; } The following Host.ned describes the hosts simple module. It loads a set of parameters from the omnetpp.ini file, the radioDelay, which is the propagation delay over the radio link, pkLenBits, which is the length of the frame, and iaTime, which is the random inter-arrival time, following exponential distribution. The rest of the parameters, txRate and slotTime, are loaded in Aloha.ned, during sub-module instantiation. simple Host { parameters: double txRate @unit(bps); // transmission rate double radioDelay @unit(s);// propagation delay of radio link volatile int pkLenBits @unit(b); // packet length in bits volatile double iaTime @unit(s); // packet interarrival time double slotTime @unit(s); // zero means no slots (pure Aloha) @display(i=device/pc_s); } Configuration The most critical file is the configuration file omnetpp.ini. It stores the values of the parameters that are loaded in the NED parameter fields. When declaring on the [General] field that Aloha.slotTime=0, is presets globally the pure ALOHA protocol. Similarly, the Aloha.numHosts=20 defines the number of hosts to be 20, the Aloha.txRate=9.6kbps defines the R to be 9600bps. The last definitions load the parameters of Aloha model and consequently the parameters of the simple modules that Aloha model controls, which are the server and the host modules. The definitions Aloha.host[*].pkLenBits=952b and Aloha.host[*].radioDelay=10ms load directly the parameters pk.LenBits and radioDelay on every host submodule, respectively. [General] network = Aloha #debug-on-errors = true #record-eventlog = true Aloha.numHosts = 20 Aloha.slotTime = 0 # no slots Aloha.txRate = 9.6Kbps Aloha.host[*].pkLenBits = 952b #=119 bytes, so that (with +1 byte guard) slotTime is a nice round number Aloha.host[*].radioDelay = 10ms [Config PureAloha1] description = pure Aloha, overloaded # too frequent transmissions result in high collision rate and low channel utilization Aloha.host[*].iaTime = exponential(2s) [Config PureAloha2] description = pure Aloha, optimal load # near optimal load, channel utilization is near theoretical maximum 1/2e Aloha.host[*].iaTime = exponential(6s) [Config PureAloha3] description = pure Aloha, low traffic # very low traffic results in channel being idle most of the time Aloha.host[*].iaTime = exponential(30s) [Config PureAlohaExperiment] description = Experimental mutliparameter demostration repeat = 2 sim-time-limit = 90min **.vector-recording = false Aloha.numHosts = ${numHosts=10,15,20} Aloha.host[*].iaTime = exponential(${mean=1,2,3,4,5..9 step 2}s) [Config SlottedAloha1] description = slotted Aloha, overloaded # slotTime = pkLen/txRate = 960/9600 = 0.1s Aloha.slotTime = 100ms # too frequent transmissions result in high collision rate and low channel utilization Aloha.host[*].iaTime = exponential(0.5s) [Config SlottedAloha2] description = slotted Aloha, optimal load # slotTime = pkLen/txRate = 960/9600 = 0.1s Aloha.slotTime = 100ms # near optimal load, channel utilization is near theoretical maximum 1/e Aloha.host[*].iaTime = exponential(2s) [Config SlottedAloha3] description = slotted Aloha, low traffic # slotTime = pkLen/txRate = 960/9600 = 0.1s Aloha.slotTime = 100ms # very low traffic results in channel being idle most of the time Aloha.host[*].iaTime = exponential(20s) A selection of the SlottedAloha2 configuration overrides the value of slotTime with Aloha.host[*].slotTime=100ms, which fixes the slotted ALOHA protocol with slot time to 100ms. The Aloha.host[*].iaTime=exponential(2s) sets the frame inter-arrival time on every host to follow exponential distribution, with mean time equals to 2 seconds. The Config option PureAlohaExperiment exploits the OMNeTs capabilities of organizing different experiments with simple repetition declarations. The statement Aloha.numHosts=${numHosts=10,15,20} declares three (3) repetitions having 10, 1 and 20 hosts respectively. The statement Aloha.host[*].iaTime=exponential(${mean=1,2,3,4,5..9 step 2}s) declares seven (7) repetitions, with interarrival times equal to exponential distribution and means, 1, 2 ,3, 4, 5, 7 and 9, respectively. The repeat=2 statement doubles the number of runs, so finally the available choices will be 2x3x7=42 from 0 to 41 optional runs. The statement sim-time-limit=90min constrains the simulation time to 90 minutes. C++ model coding The simple modules Host and Server are based on C++ programming. The relevant host.cc, host.h, server.cc and server.h, which are included entirely in the appendix section, implement the model behavior during simulation by exchanging messages directly one-another or with the simulation kernel. The following Fig. 11 is a design- level class diagram, describing the basic relationships among network module Aloha and simple modules, Host and Server. The two last, inherit from cSimpleModule simulation class library, and redefine the basic methods initialize(), handleMessage(), activity() and finish(), according to the desired function. The Aloha network model comprises of several Host objects and one Server, so it keeps an aggregation association with Host and Server classes. It passes also to them some parameter values, some declared in the omnetpp.ini file and some taken from user dialog form. The Host module keeps an one-way association with Server because every Host declares a Server object in the attribute field, in order to send a direct message (pk) later, by calling the sendDirect() function. The scheduleAt() function programs the kernel to send the Host an endTxEvent message when the transmission ends. This is represented by the self-association. Similarly, the Server module programs the kernel to send the Server an endRxEvent, when the reception of the message sent from Host finishes, and is represented as the self-association. The module code is cited commented in the appendix. Here, I will explain the finish() function of the server module, because it creates the result reports, necessary for the exploitation of the simulation. void Server::finish() { EV

Causes and efects of Obesity Essay

Obesity is a factor that increases risk developing a number of serious and potentially life – threatening disease. At present, obesity rates are rising in several developed countries such as the United States, Mexico, the United Kingdom, New Zealand and Hungary. Around a quarter of these countries’s population is overweight. This essay will look at some of the causes and effects of obesity. Firstly, energy imbalance most often causes obesity. Energy imbalance is the excess of energy in over energy out. Energy in and energy out are the amount of calories the body obtains and uses, respectively. If the amount of energy in is greater than the amount of energy out, your body contains unnecessary calories. Unecessary calories is transformed into fat. The more fat you get, the more weight you gain. Overtime, obesity is inevitable. The other major cause of obesity is lack of physical activities. Sufficiently practicing of physical activities is one of the best way help burn unnecessary calories. Therefore, lacking of volume of physical activities leads to extra calories retained. As a result, obesity happens. For intances, many people hace jobs that involve too much desk sittng and no physical activities. They do not use all the energy provided by foods they eat, and the extra calories are stored as fat instead, which causes obesity. Obesity is a risk factor for many dangerous disease. However, there are two most fatal effects of obesity.  Firstly, obesity has been known as the main factor of high blood pressure. High blood pressure is literally the pressure on blood vessels caused by high workload of heart. The obese body contains fat tissue that needs oxygen and nutrients to live, which requires more blood. Therefore, the heart must pumps more blood through blood vessels, and vessels indure high pressure of blood. This causes high blood pressure. The other consequence of obesity is type 2 diabetes. Diabetes is medical condition which makes blood sugar level higher than normal. This is the  result of insulin resitance. Obesity can cause resistance to insulin, the hormone that regulates blood sugar. When obesity causes insulin resistance, the blood sugar becomes eveluated. Even moderate obesity dramatically increases the risk of diabetes, such as blindness. To summarise, obesity derives from two major causes which are energy imbalance and lack of physical activities. Its effects are numberous but the most critical ones are high blood pressure and diabetes. People who are struggling with obesity should start to do more physical activities and have a balance diet in their daily life, so that they can lose weight and avoid obesity.

Frankenstein coursework Essay

Frankenstein was written in 1816 by female novelist, Mary Shelley. She was only 18 at the time she had the idea for it. Her, her boyfriend Percy Shelley (whom she later married) and some of her friends were on holiday at the shore of lake Geneva in Switzerland, and at the time it was pouring down outside, so one of them decided that they should have a competition to see who could create the scariest horror story. Each person tried desperately to think of one, so much that they tried eating things that would give them nightmares. Mary had the idea of a creature being brought to life, which then lead to the birth of Frankenstein.  This book is often referred to as ‘the modern Prometheus’, named after a greek god who stole power from heaven to create life from lifeless materials. When this book was first published, it was done so under an anonymous name because in those days women were not supposed to do things like  Write horror stories and therefore would have been outcast.  Summary  This story is based upon an English man called Robert Walton who is writing to his sister back in England. He is seeking to find the North Pole. In doing this, he finds a man called Victor Frankenstein floating on a piece of ice. Walton drags the man aboard and revives him. When Frankenstein is recovered he starts to tell his story.  He begins to tell Walton about his father and how he came to life, and goes on to talk about his childhood. At this time everything seems fine as Frankenstein appears to have had a very happy time as a child with his family, but it is after this that things start to go wrong. Frankenstein tells of how he goes to university to study natural philosophy, otherwise known as chemistry. It is from this that he goes on to make the discovery he so dearly goes to regret – the discovery of giving new life to dead material.  He goes on to say that with this discovery he begins to build a new being. He not only begins to build it, he becomes obsessed with creating new life and even though he becomes ill he continues with it until it is done. He explains how excited he is with what he is doing and how he can’t wait to get it finished. However, when it does spring to life the last emotion Frankenstein feels is joy. He is horrified by his creation, and runs out of his room. He returns later to find, to his extreme delight, the monster to be gone. Frankenstein soon forgets about it and decides to return to Geneva to visit his family who he has not seen for 5 years. He returns to discover some grave news.  His younger brother, William, has been murdered and his adopted sister, Justine, has been accused of the crime. Frankenstein instantly knows who had really performed the act. He knew that it was the monster he created which had done this heinous deed. He knew, however, if he told the court that they would not believe him, so Justine was convicted and executed. This filled Frankenstein with great bitterness and hatred towards the monster. He decides to go for a walk in the Alps to take his mind off things. It is here where he confronts the monster for the second time.  When Frankenstein sees the monster his first instinct is to kill it, but the monster is a lot bigger than stronger than him. The monster then tells Frankenstein to listen to what he says and then judge him. This is where the monster tells his story.  He says that he came into the world with no understanding of anything around him, like a fully-grown baby. After his confrontation with Frankenstein, he walked out into a park, where he found berries to eat and a stream to drink from. He then moved out into the countryside where he had numerous encounters with humans he’d rather forget about. Whenever humans saw him, they either ran away or attacked the monster. This upset him, because he did not wish to harm them. Eventually, he found a small ‘hovel’ (small hut) on a farm. It was here he stayed for a long time. He learnt the names of the people who lived on the farm, and also their history, that they were sent out of France by the government because they were planning to free someone from prison. The monster slowly picked up their language of these people and also how to read from old books they threw out. He helped the family by cutting wood for them at night in the winter at night, and generally became quite attracted to the family. After a year and a bit, the monster decided he would confront the family. This went well at first because firstly he met the old man. This was an advantage to the monster because the old man was blind and couldn’t judge him by his looks. However, when the rest of the family came home they were horrified by the monsters appearance and attacked him. The monster was very upset by this and ran out of the house.  He ran out into the forest, and returned the following morning to discover the family rushing to leave the place from the monster. He was so angered by this that he trashed the farm, destroying everything and burning it all. The monster then set his sights on returning to Geneva. He spent about half a year travelling but eventually got there.  When he got there he discovered Frankenstein’s younger brother, William. The monster grabbed the boy, and he started shouting so he tried to silence him by choking him and ended up killing him. The monster found a pendant round the boy’s neck, and out it round a girl who was sleeping nearby, and then ran. It is here the monster concludes his story.

history of Bumgardner Family essays

history of Bumgardner Family essays In my paper, I want to discuss the family from Augusto County, Bumgardner family, I want to talk about their relationship with each other. The father was a farmer and distiller. The mother made a quilt for her oldest daughter, Eugenia E. Sproul, that has been past done through the years, they seem like they had strong relationship. They have two sons, William and Jacob who were both in the military. Jacob was a 1st sergeant in the Marquis Boys regiment in 1864 and William was a private in the 1st Va Cav. Eugenias husband was also in the Militia. I want to talk about their lifestyles and the symbolic quilt that Melinda McCorkle Bumgardner made. The family lived in the South, Augusto County and owned 23 slaves, the daughter, who married Archibald Sproul, who was also fought on the confederate side, owned six slaves. This family, so far seems well off, they had a large piece of land, with many animals and probably had plenty of work to keep their 23 slaves busy. I found this familys name is many sections of this website. I have searched through the public records and have found the population census, the agricultural census and the slave owner have been resourceful. I am using the section under Images and Maps about the Antibellum Quilts from the Upper Shenandoah Valley. The mother made a beautiful quilt for her daughter, and still today its being passes down the family to the next girl named Eugenia. I want to learn more about the slaves they owned and what happened to them, I am not sure how to find out the names of their slaves. I want to see if I can find any articles or letters having to do with this family. I have found no church records about them. I did want to compare this families lifestyle and way of living to another family in the northern county of Franklin, PA, but after researching on this family I realized that there is so much information I want to include and discuss. ...

Consider our readings from the radical right-wing terrorist Pierluigi

Consider our readings from the radical right-wing terrorist Pierluigi Consider our readings from the radical right-wing terrorist Pierluigi Concutelli and from the interviews with radical left-wing terrorists conducted by Cataldo and Neuburger. Did these people all become terrorists for simila Many scholars and historians have focused much of their research on the reasons why people have chosen to become terrorists in the past, one way of researching this was through the interviews of past or current people considered to be terrorists. In the interview with the right-wing terrorist Pierluigi Concutelli, he explains many of the reasons why he chose to join, whether it was for the power or just to be part of a movement bigger than himself. In the interviews of radical left-wing terrorists by Cataldo and Neuburger, three different people with very different roles explained why they chose to join groups such as Prima Linea where they used violence to achieve a ?more just, freer society.? While the overall goals of both these groups were very different, the people who chose to join them did so for similar reasons in hopes of making a difference. At a societal level right-wing terrorist groups have extremely opposing views of how their governments should be run than those of the left-wing terrorists, yet individually their members all joined for very similar reasons including the ability to exert power and influence over others, being part of a larger overall movement and because of the specific context and events happening around them. With such similar reasons for becoming terrorists, it is no wonder both sides ended up fighting a common enemy as opposed to one another. Peirreluigi Concutelli?s memoir explains some of the reasons he and many of his fellow Fascists resorted to violence and terrorism in order to get their message across. Concutelli tells how he was born into an age of hatred where, ?Men and boys with machine-guns and with a dream that seemed within arms? reach against men and boys who were defending a dream already dead and done with. I am a child of those days (Concutelli, 2). This shows that with so much violence surrounding him, it was only a matter of time before he would join in to make a difference for what he believed in. While attending university in Sicily he began to meet fellow right-wing Fascists who would tell stories about how much better things were without the Christian Democrats who were currently in charge. Hearing these stories and finding people with similar beliefs to him ?gave me a sense of belonging that was real but at the same time dangerous? I came to live in a kind of Indian reservation deliberately set up f or just a few of the elect. It was quality against quantity. We were in the right, the others were wrong.? (Concutelli, 4). While at this point Concutelli was not yet willing to become a terrorist for his ideology, he soon realized that his Fascist comrades were becoming a minority and as their persecution increased so did their lust for revenge. The press also instigated violence by blaming Fascists for many bombing attacks where those responsible were never caught. ?Without the right to speak?we were excluded at the newspapers, the universities, the schools? It was in this atmosphere that, slowly, under their voices, people started talking about armed struggle.? (Concutelli, 7). These are some of the main reasons a University educated man such as Concutelli chose to become an assassin and live the rest of his life in jail rather than live out a normal life without his preferred political system. Left-wing terrorists who were interviewed in Women and Terrorism shows how terrorists at this time came from all walks of life and that ethnicity, gender and age had no effect on what people were willing to do. The terrorist ?F? who was interviewed after spending four and a half years in prison for participating in three murders said she joined Prima Linea because of ?the pervasive feeling of the youth being powerless to change things and an impatience with waiting for the birth of a more just, freer society.? (De Cataldo Neuburger, 99). With such dissatisfaction with her current government, F chose to fight back by housing other terrorist members tasked with

Texas and The Death Penalty Research Paper Example | Topics and Well Written Essays - 1500 words

Texas and The Death Penalty - Research Paper Example Being represented by the right lawyer determines the chances of providing adequate evidence to ascertain one's innocence or guiltiness. Opponents of death penalties argue that some people may end up being killed while they are innocent if the trial is not fair or if the accused person’s counsel lacks expertise. This has raised the issue of the appropriateness of death execution for punishing offenders since the trial process may result in conviction and murder of innocent individuals (â€Å"American Civil Liberties Union† Web). Another issue surrounding the death penalty is diversity inconsistencies such as racial and gender. There have been arguments that the number of African Americans sentenced to death and executed is higher as compared to other races. Additionally, there are perceptions that cases where the victim is black rarely lead to death row while those involving white victims often lead to death rows. Such statistics have led to questions regarding the evenhandedness of the justice system when dealing with capital offenses. On the issue of diversity, there is a problem regarding the role of gender in determining the penalty. In most cases, capital offenses involving men are likely to lead to the death penalty as compared to those involving women. At times, this has created the notion that the justice system favors women suspects (â€Å"American Civil Liberties Union† Web). Another issue surrounding the death penalty in Texas is whether the punishment serves its purpose. Legal punishment is designed to correct the perpetrator of the crime and or deter others from committing such crimes.  

Maslow's Hierarchy of Needs Essay Example | Topics and Well Written Essays - 750 words

Maslow's Hierarchy of Needs - Essay Example This hierarchy applies to humans individually. Every one has different needs and requirements and therefore they move across the hierarchy differently. For example if you put Bill Gates in this hierarchy, then he might only need to fulfill his self actualization need because all his previous needs have already been fulfilled. Some one might not require safety need because he or she might not give much importance to it and therefore directly move to the esteem need. People with different age bracket and with different sex have different requirements with respect to these needs. The biological need is the basic need and therefore it remains the same for males or females. People with 18-30 year age bracket require this need more because these people are not usually established and are working hard for a better living where as people above this age bracket usually are settled and has less of this need. Safety need is more amongst females as compared to males as they feel more insecure than men. Belongingness and love need is equally important for either males of females or person of any age group. It is surprising that women have more of esteem needs than men and very less of people in the 18-30 age group desire esteem need. Aesthetics need is only amongst the fem... Belongingness and love need is equally important for either males of females or person of any age group. It is surprising that women have more of esteem needs than men and very less of people in the 18-30 age group desire esteem need. Aesthetics need is only amongst the females. And females of age group 18-30 desire more of it than do the 31-45 because those females are more young and trendy and therefore follow the fashion. Many people like to achieve the self actualization but females desire more of this need than do males. People above the 31 years of age might go for it because they might have fulfilled all the other needs and this is the last thing left. Transcendence is related to self actualization but it is basically to do something which no one other has done or to think out of the ordinary and this is more in men than in women. And this desire of need arises more when a person has just passed or about to pass the teen age and is a young person when the capacity to think creatively is more as compared to after the thirties. Bibliography Richard L. Daft. Management. Orlando, Florida: The Dryden Press, Harcourt Brace College Publishers,