Wagners Die Walkre Essay Example | Topics and Well Written Essays - 1250 words

Wagners Die Walkre - Essay Example The scenes Die Walkure, Act III, Scene 3 presents Walton, overcome and deeply moved by emotions, bidding farewell to Brunnhilde, who was then on her knees. Walton raises her from her knees while gazing her in the eyes, still filled with emotions, and echoes the farewell words. In his sentiments, Walton recalls the beautiful memories that he shared with Brunnhilde while expressing his regrets and difficulties that he was experiencing at the moment. The mood in these setting is that of grief, when Walton, despite his love for Brunnhilde, has to leave. The scenes presented the comeback of Valkyries from a battle joined by Brunnhilde alongside Sieglinde. Sieglinde had to live to bear Siegmund’s child, and is currently allowed away, prior to Walton’s arrival. Valkyries condemns his adorable daughter onto a rock, where she had to lie senselessly until roused by a mortal who was to be her husband. She pleads that her husband should be son to Sieglinde, whose name would be Siegfried. Walton departs leaving Brunnhilde surrounded by a protective fire meant to guard her as she sleeps to her magic (Roth 153). Once more, the motifs are interwoven, providing a further dimension to the story that it is complex and fraught with accompaniment of deeper and wider association. Orchestral extracts from Die Walkure include a stormy prelude on the first act, a prelude onto the second and a famous ride of Valkyries that introduces the third act. Siegmund remembers the promise of his father of giving him a sword. The narrative of Sieglinde brings out her sad forced marriage to Hunding. The joy brought by Siegmund to his sister is evident in his winter storms that waned in the moon of delight, while greeting and attributing her coming as the spring The second act of this scene illustrates Fricka’s denunciation of Wotan, and the explanations of Wotan to Brunnhilde, when the love of young pleasure left. Brunnhilde informs Sigmund of his impending death. Her pleas to the father

Life after college Term Paper Example | Topics and Well Written Essays - 1250 words

Life after college - Term Paper Example Additionally, high numbers of job seekers with similar qualification have flooded the job market creating another significant challenge among the fresh graduate of proving their uniqueness before the recruitment panel (Carol, para10). This study therefore, will investigate the challenges that college students undergo through immediately after graduation. In above connection, the study will focus on unemployment and high debts among college graduates. Challenges student come across after college graduation, including unemployment and high debts Higher education has greatly been attributed to numerous benefits such as; improved standard of living, higher income, increased productivity and reduction in production cost among other benefits. Additionally, numerous states provide higher income to those with higher level of education as compared to those with lower education levels (Roksa, Josipa and Richard, para2-25). For instance, high school graduates were anticipated to receive lower i ncome as compared to diploma and degree holders. However, there have been some variations in respect education to level of education and income. ... Connectively, most college graduate faced the challenges of securing a job because most of the courses they took at their respective universities could not correlate with the market demand. This forced many employers to recruit college graduates from other foreign countries (Coy, paras1-6). In above connection, lack of adequate academic engagement such as working while still in college, especially during vacation has contributed greatly to unemployment among the college graduates. This is because through academic engagements students not only acquire new experience but also experience tremendous growth in their career life. This provides them competitive edge of securing a job after completing their college education (Roksa, Josipa and Richard, para17). Additionally, some college students may found that employers are not hiring on their geographical areas and therefore, some may find it quite challenging to move into new areas to look for a job due to housing and income problems (Car ol, paras1-5). On the other hand, most college graduates do not make to the interview room despite sending their application. This is because of improper writing of their resumes which denies them a chance to be invited for an interview despite being qualified for a job. However, some who make to an interview room fails to get a job due to failure of expressing themselves properly such that an employer can become convinced that they are the best candidates for a job. Connectively, majority of the college graduate tend to be confused on what to do after completing their college. This is because some do not know where to start (Carol, para5). Research report indicates that most students after graduation lacks financial freedom and tend to rely heavily on their parents

Proving Establish Liability For Each Offence Essay Example for Free

Proving Establish Liability For Each Offence Essay Archie is employed to protect the pheasants on Lord Melchetts estate from poachers. On day, from a distance he sees Liam and Craig on the estate and, knowing them to be poachers, he decides to rid himself of the problem for all time and fires his shotgun at them. Both Liam and Craig are only wounded, however, but do need to be taken to hospital for treatment. On the way to the hospital, the brakes on the ambulance fail, it leaves the road and overturns on a bend and Liam dies in the accident. With reference to the case situation above, discuss, using decided cases to support you arguments: a) The offences, if any, with which Archie could be charged and what the prosecution would need to prove to establish liability for each offence; (20) b) And whether you think Archie would be convicted of any offence. (5) a. In relation to the death of Liam, there is the possibility that Archie would be charged under homicide. Archie carried out the apt actus reus of homicide, whereby he has committed an unlawful killing in the Queens peace in the county of the realm and death occurs within 1 year and 1 day. Although Liam died only in the accident, the main cause for his death was Archie shooting at him. As such, Archie has provided for the cause in fact, according to the but-for test, where if but-for Archie, Liam would not have died. Contrary to R v. White, where the defendants mother died not from his poisoned drink but from a heart attack, Archie caused Liams death. Furthermore, Archie also undertakes the cause in law, as Liams wound is both substantive and operative. This is because it was Archies action that caused the injury (substantive) and this injury was still present at the time of Liams death (operative), as in R v. Malcherek Steel, where it was held that original injuries were still an operative cause of victims death. However, it may be argued that a Novus Actus Intervenis, an intervening event, caused Liams death and that Archie is not the main cause. This is only partially true, as the ambulances break failure was the last event of the chain of causation and causing Liams death. Yet, Archie can still be held liable if it can be established that there was a break in the chain of causation, however, there is none. Thus, the ambulance accident was merely a negligent contribution, as in R v. Benge, and Archies act is the cause of Liams death. According to the mens rea of murder, proof of intention to kill or cause grievous bodily harm must be shown, as established in R v. Moloney, holding that intention may be inferred from the defendants foresight of consequences. Here, the charge will depend on Archies intention, which might be deduced from the words that he muttered: rid himself of the problem for all time. As such, Archie knew the consequences of his actions, and had an intention to carry it out. Yet if this is the case, it must also be considered why Archie didnt actually carry out his apparent intention, to rid himself of the problem for all time, as he did not actually get rid of (ie. kill) them. However, if this is not the case, it can be said that Archies intention can be found if he foresaw death or GBH as a virtually certain consequence, as in R v. Woollin. It is also not known where and the number of times Archie shot at Liam and Craig, as this would confer an indication of any considerable intention. If Archies shooting was limited, perhaps one or two in the leg, then it can be said he had no intention to kill, but just an intention to frighten. If he only had an intention to frighten, then his act is already an unlawful act in itself, as it is dangerous and is foreseeable to cause harm. This is true with Archie, and he also had the intention to commit the unlawful act, as in R v. Lamb, where the defendant did not have the mens rea to kill, but only to shoot the gun. Archies act was also dangerous, likewise in R v. Church where it was held that dangerous would mean a reasonable man realizing the risk of creating some harm. In DPP v. Newbury Jones, it is said that if the accused intentionally commits a dangerous and unlawful act, causing harm or incidentally, the death, of another, he is then guilty of constructive murder. Therefore, in relation to Liams death, Archie can be liable for constructive manslaughter. In relation to the injuries sustained by Craig, there is the possibility that Archie will be charged under Section 20 of the Offences Against Persons Act 1861. The actus reus required here is merely wounding, as defined in JJC v. Eisenhower as breaking of the skin(skin here meaning any surface of the human body) or inflicting grievous bodily harm. The mens rea necessary includes a malicious intention and a foresight of physical harm. This foresight must involve the possibility of some physical harm to a person, as in R v. Mowatt. Archie, thus fulfills both the actus reus and mens rea for S20 of the OAPA. However, Archie may also be charged under Section 47 and Section 42. Under S47, Craig has to be seen to have sustained actual bodily harm, defined in R v. Miller as any harm calculated to interfere with persons health and comfort. Under S42, Archie has to be seen to put another person in fear of immediate personal violence and has touched another without their consent. If this can be established, Archie would be liable for Section 20 (Offence involving wounding/GBH), Section 47 (Common assault, battery GBH) and Section 42 (Assault battery) of the Offences Against Persons Act 1861. b. In the case of Liams death, Archie would be charged for murder. However, this is rather difficult to prove, as the mens rea required for murder involves proof of intention to kill or cause grievous bodily harm as established in R v. Moloney. Thus, he would not be convicted of murder, but rather involuntary manslaughter, with constructive liability. As for Craigs injuries, Archie would be charged under Section 20 of the OAPA. Further charges might include Sections 47 and 42. The conviction under Section 20 is undeniable, but for Section 47 and 42, it is only highly plausible.

Microcontroller Embedded Memory Technology Information Technology Essay

Microcontroller Embedded Memory Technology Information Technology Essay A  microcontroller  is a small computer on a single  integrated circuit  containing a processor core, memory, and programmable  input/output  peripherals. Program memory in the form of  NOR flash  or  OTP ROM  is also often included on chip, as well as a typically small amount of  RAM. Microcontrollers are designed for embedded applications, in contrast to the  microprocessors  used inpersonal computers  or other general purpose applications. http://upload.wikimedia.org/wikipedia/commons/thumb/c/c7/153056995_5ef8b01016_o.jpg/230px-153056995_5ef8b01016_o.jpg Microcontrollers are used in automatically controlled products and devices, such as automobile engine control systems, implantable medical devices, remote controls, office machines, appliances, power tools, and toys. By reducing the size and cost compared to a design that uses a separate microprocessor, memory, and input/output devices, microcontrollers make it economical to digitally control even more devices and processes. Mixed signal microcontrollers are common, integrating analog components needed to control non-digital electronic systems. Some microcontrollers may use four-bit words and operate at  clock rate  frequencies as low as 4  kHz, for low power consumption (milliwatts or microwatts). They will generally have the ability to retain functionality while waiting for an event such as a button press or other interrupt; power consumption while sleeping (CPU clock and most peripherals off) may be just nanowatts, making many of them well suited for long lasting battery applications. Other microcontrollers may serve performance-critical roles, where they may need to act more like a  digital signal processor(DSP), with higher clock speeds and power consumption. Embedded design A microcontroller can be considered a self-contained system with a processor, memory and peripherals and can be used as an  embedded system.[1]  The majority of microcontrollers in use today are embedded in other machinery, such as automobiles, telephones, appliances, and peripherals for computer systems. These are called  embedded systems. While some embedded systems are very sophisticated, many have minimal requirements for memory and program length, with no operating system, and low software complexity. Typical input and output devices include switches,  relays,  solenoids,  LEDs, small or custom  LCD  displays, radio frequency devices, and sensors for data such as temperature, humidity, light level etc. Embedded systems usually have no keyboard, screen, disks, printers, or other recognizable I/O devices of a  personal computer, and may lack human interaction devices of any kind. Interrupts Microcontrollers must provide  real time  (predictable, though not necessarily fast) response to events in the embedded system they are controlling. When certain events occur, an  interruptsystem can signal the processor to suspend processing the current instruction sequence and to begin an  interrupt service routine  (ISR, or interrupt handler). The ISR will perform any processing required based on the source of the interrupt before returning to the original instruction sequence. Possible interrupt sources are device dependent, and often include events such as an internal timer overflow, completing an analog to digital conversion, a logic level change on an input such as from a button being pressed, and data received on a communication link. Where power consumption is important as in battery operated devices, interrupts may also wake a microcontroller from a low power sleep state where the processor is halted until required to do something by a peripheral event. Programs Microcontroller programs must fit in the available on-chip program memory, since it would be costly to provide a system with external, expandable, memory. Compilers and assemblers are used to convert high-level language and assembler language codes into a compact  machine code  for storage in the microcontrollers memory. Depending on the device, the program memory may be permanent, read-only memory that can only be programmed at the factory, or program memory may be field-alterable flash or erasable read-only memory. Other microcontroller features Microcontrollers usually contain from several to dozens of general purpose input/output pins (GPIO). GPIO pins are software configurable to either an input or an output state. When GPIO pins are configured to an input state, they are often used to read sensors or external signals. Configured to the output state, GPIO pins can drive external devices such as LEDs or motors. Many embedded systems need to read sensors that produce analog signals. This is the purpose of the  analog-to-digital converter  (ADC). Since processors are built to interpret and process digital data, i.e. 1s and 0s, they are not able to do anything with the analog signals that may be sent to it by a device. So the analog to digital converter is used to convert the incoming data into a form that the processor can recognize. A less common feature on some microcontrollers is a  digital-to-analog converter  (DAC) that allows the processor to output analog signals or voltage levels. In addition to the converters, many embedded microprocessors include a variety of timers as well. One of the most common types of timers is the  Programmable Interval Timer  (PIT). A PIT may either count down from some value to zero, or up to the capacity of the count register, overflowing to zero. Once it reaches zero, it sends an interrupt to the processor indicating that it has finished counting. This is useful for devices such as thermostats, which periodically test the temperature around them to see if they need to turn the air conditioner on, the heater on, etc. Time Processing Unit  (TPU) is a sophisticated timer. In addition to counting down, the TPU can detect input events, generate output events, and perform other useful operations. A dedicated  Pulse Width Modulation  (PWM) block makes it possible for the CPU to control  power converters,  resistive  loads,  motors, etc., without using lots of CPU resources in tight timerloops. Universal Asynchronous Receiver/Transmitter  (UART) block makes it possible to receive and transmit data over a serial line with very little load on the CPU. Dedicated on-chip hardware also often includes capabilities to communicate with other devices (chips) in digital formats such as  I2C  and  Serial Peripheral Interface  (SPI). Higher integration In contrast to general-purpose CPUs, micro-controllers may not implement an external address or data bus as they integrate RAM and non-volatile memory on the same chip as the CPU. Using fewer pins, the chip can be placed in a much smaller, cheaper package. Integrating the memory and other peripherals on a single chip and testing them as a unit increases the cost of that chip, but often results in decreased net cost of the embedded system as a whole. Even if the cost of a CPU that has integrated peripherals is slightly more than the cost of a CPU and external peripherals, having fewer chips typically allows a smaller and cheaper circuit board, and reduces the labor required to assemble and test the circuit board. A micro-controller is a single  integrated circuit, commonly with the following features: central processing unit   ranging from small and simple 4-bit  processors to complex 32- or 64-bit processors discrete input and output bits, allowing control or detection of the logic state of an individual package pin serial  input/output  such as  serial ports  (UARTs) other  serial communications  interfaces  like  I ²C,  Serial Peripheral Interface  and  Controller Area Network  for system interconnect peripherals  such as  timers, event counters,  PWM generators, and  watchdog volatile memory (RAM) for data storage ROM,  EPROM,  EEPROM  or  Flash memory  for  program  and operating parameter storage clock generator   often an oscillator for a quartz timing crystal, resonator or  RC circuit many include analog-to-digital converters in-circuit programming and debugging support This integration drastically reduces the number of chips and the amount of wiring and  circuit board  space that would be needed to produce equivalent systems using separate chips. Furthermore, and on low pin count devices in particular, each pin may interface to several internal peripherals, with the pin function selected by software. This allows a part to be used in a wider variety of applications than if pins had dedicated functions. Micro-controllers have proved to be highly popular in  embedded systems  since their introduction in the 1970s. Some microcontrollers use a  Harvard architecture: separate memory buses for instructions and data, allowing accesses to take place concurrently. Where a Harvard architecture is used, instruction words for the processor may be a different bit size than the length of internal memory and registers; for example: 12-bit instructions used with 8-bit data registers. The decision of which peripheral to integrate is often difficult. The microcontroller vendors often trade operating frequencies and system design flexibility against time-to-market requirements from their customers and overall lower system cost. Manufacturers have to balance the need to minimize the chip size against additional functionality. Microcontroller architectures vary widely. Some designs include general-purpose microprocessor cores, with one or more ROM, RAM, or I/O functions integrated onto the package. Other designs are purpose built for control applications. A micro-controller instruction set usually has many instructions intended for bit-wise operations to make control programs more compact.[2]For example, a general purpose processor might require several instructions to test a bit in a register and branch if the bit is set, where a micro-controller could have a single instruction to provide that commonly-required function. Microcontrollers typically do not have a  math coprocessor, so  floating point  arithmetic is performed by software. Volumes About 55% of all  CPUs  sold in the world are  8-bit  microcontrollers and microprocessors. According to Semico, over four billion 8-bit microcontrollers were sold in 2006.[3] A typical home in a developed country is likely to have only four general-purpose microprocessors but around three dozen microcontrollers. A typical mid-range automobile has as many as 30 or more microcontrollers. They can also be found in many electrical devices such as washing machines, microwave ovens, and telephones. http://upload.wikimedia.org/wikipedia/commons/thumb/1/18/PIC18F8720.jpg/220px-PIC18F8720.jpg A  PIC  18F8720  microcontroller  in an 80-pin  TQFP  package. Manufacturers have often produced special versions of their microcontrollers in order to help the hardware and  software development  of the target system. Originally these included  EPROM  versions that have a window on the top of the device through which program memory can be erased byultraviolet  light, ready for reprogramming after a programming (burn) and test cycle. Since 1998, EPROM versions are rare and have been replaced by  EEPROM  and  flash, which are easier to use (can be erased electronically) and cheaper to manufacture. Other versions may be available where the  ROM  is accessed as an external device rather than as internal memory, however these are becoming increasingly rare due to the widespread availability of cheap microcontroller programmers. The use of field-programmable devices on a microcontroller may allow field update of the  firmware  or permit late factory revisions to products that have been assembled but not yet shipped. Programmable memory also reduces the lead time required for deployment of a new product. Where hundreds of thousands of identical devices are required, using parts programmed at the time of manufacture can be an economical option. These mask programmed parts have the program laid down in the same way as the logic of the chip, at the same time. Programming environments Microcontrollers were originally programmed only in  assembly language, but various  high-level programming languages  are now also in common use to target microcontrollers. These languages are either designed specially for the purpose, or versions of general purpose languages such as the  C programming language.  Compilers  for general purpose languages will typically have some restrictions as well as enhancements to better support the unique characteristics of microcontrollers. Some microcontrollers have environments to aid developing certain types of applications. Microcontroller vendors often make tools freely available to make it easier to adopt their hardware. Many microcontrollers are so quirky that they effectively require their own non-standard dialects of C, such as  SDCC for the 8051, which prevent using standard tools (such as code libraries or static analysis tools) even for code unrelated to hardware features. Interpreters are often used to hide such low level quirks. Interpreter  firmware is also available for some microcontrollers. For example,  BASIC  on the early microcontrollers  Intel  8052[4]; BASIC and  FORTH  on the  Zilog Z8[5]  as well as some modern devices. Typically these interpreters support  interactive programming. Simulators  are available for some microcontrollers, such as in Microchips  MPLAB  environment. These allow a developer to analyze what the behavior of the microcontroller and their program should be if they were using the actual part. A simulator will show the internal processor state and also that of the outputs, as well as allowing input signals to be generated. While on the one hand most simulators will be limited from being unable to simulate much other hardware in a system, they can exercise conditions that may otherwise be hard to reproduce at will in the physical implementation, and can be the quickest way to debug and analyze problems. Recent microcontrollers are often integrated with on-chip  debug  circuitry that when accessed by an  in-circuit emulator  via  JTAG, allow debugging of the firmware with a  debugger. Types of microcontrollers : Freescale 68HC11  (8-bit) Intel 8051 ARM  processors (from many vendors) using  ARM7  or Cortex-M3 cores are generally microcontrollers STMicroelectronics  STM8  (8-bit),  ST10  (16-bit) and  STM32  (32-bit) Atmel  AVR  (8-bit),  AVR32  (32-bit), and  AT91SAM  (32-bit) Freescale  ColdFire  (32-bit) and  S08  (8-bit) Hitachi H8,  Hitachi SuperH  (32-bit) Hyperstone  E1/E2 (32-bit, First full integration of  RISC  and  DSP  on one processor core [1996]  [1]) MIPS  (32-bit PIC32) NEC V850  (32-bit) PIC  (8-bit PIC16, PIC18, 16-bit dsPIC33 / PIC24) PowerPC  ISE PSoC (Programmable System-on-Chip) Rabbit 2000  (8-bit) Texas Instruments Microcontrollers  MSP430  (16-bit), C2000 (32-bit), and Stellaris (32-bit) Toshiba TLCS-870  (8-bit/16-bit) Zilog eZ8  (16-bit),  eZ80  (8-bit) and many others, some of which are used in very narrow range of applications or are more like applications processors than microcontrollers. The microcontroller market is extremely fragmented, with numerous vendors, technologies, and markets. Note that many vendors sell (or have sold) multiple architectures. Interrupt latency In contrast to general-purpose computers, microcontrollers used in embedded systems often seek to optimize  interrupt latency  over instruction throughput. Issues include both reducing the latency, and making it be more predictable (to support real-time control). When an electronic device causes an interrupt, the intermediate results (registers) have to be saved before the software responsible for handling the interrupt can run. They must also be restored after that software is finished. If there are more registers, this saving and restoring process takes more time, increasing the latency. Ways to reduce such context/restore latency include having relatively few registers in their central processing units (undesirable because it slows down most non-interrupt processing substantially), or at least having the hardware not save them all (this fails if the software then needs to compensate by saving the rest manually). Another technique involves spending silicon gates on shadow registers: one or more duplicate registers used only by the interrupt software, perhaps supporting a dedicated stack. Other factors affecting interrupt latency include: Cycles needed to complete current CPU activities. To minimize those costs, microcontrollers tend to have short pipelines (often three instructions or less), small write buffers, and ensure that longer instructions are continuable or restartable.  RISC  design principles ensure that most instructions take the same number of cycles, helping avoid the need for most such continuation/restart logic. The length of any  critical section  that needs to be interrupted. Entry to a critical section restricts concurrent data structure access. When a data structure must be accessed by an interrupt handler, the critical section must block that interrupt. Accordingly, interrupt latency is increased by however long that interrupt is blocked. When there are hard external constraints on system latency, developers often need tools to measure interrupt latencies and track down which critical sections cause slowdowns. One common technique just blocks all interrupts for the duration of the critical section. This is easy to implement, but sometimes critical sections get uncomfortably long. A more complex technique just blocks the interrupts that may trigger access to that data structure. This often based on interrupt priorities, which tend to not correspond well to the relevant system data structures. Accordingly, this technique is used mostly in very constrained environments. Processors may have hardware support for some critical sections. Examples include supporting atomic access to bits or bytes within a word, or other atomic access primitives like theLDREX/STREX  exclusive access primitives introduced in the  ARMv6  architecture. Interrupt nesting. Some microcontrollers allow higher priority interrupts to interrupt lower priority ones. This allows software to manage latency by giving time-critical interrupts higher priority (and thus lower and more predictable latency) than less-critical ones. Trigger rate. When interrupts occur back-to-back, microcontrollers may avoid an extra context save/restore cycle by a form of  tail call  optimization. Lower end microcontrollers tend to support fewer interrupt latency controls than higher end ones. History The first single-chip microprocessor was the 4-bit  Intel 4004  released in 1971. With the  Intel 8008  and more capable microprocessors available over the next several years. These however all required external chip(s) to implement a working system, raising total system cost, and making it impossible to economically computerize appliances. The first computer system on a chip optimized for control applications was the  Intel 8048  released in 1975,[citation   with both  RAM  and  ROM  on the same chip. This chip would find its way into over one billion PC keyboards, and other numerous applications. At this time Intels President, Luke J. Valenter, stated that the (Microcontroller) was one of the most successful in the companies history, and expanded the divisions budget over 25%. Most microcontrollers at this time had two variants. One had an erasable  EPROM  program memory, which was significantly more expensive than the  PROM  variant which was only programmable once. In 1993, the introduction of  EEPROM  memory allowed microcontrollers (beginning with the Microchip  PIC16x84)  [2][citation needed]) to be electrically erased quickly without an expensive package as required for  EPROM, allowing both rapid prototyping, and  In System Programming. The same year, Atmel introduced the first microcontroller using  Flash memory.[6] Other companies rapidly followed suit, with both memory types. Cost has plummeted over time, with the cheapest 8-bit microcontrollers being available for under $0.25 in quantity (thousands) in 2009,[citation needed]  and some 32-bit microcontrollers around $1 for similar quantities. Nowadays microcontrollers are low cost and readily available for hobbyists, with large online communities around certain processors. In the future,  MRAM  could potentially be used in microcontrollers as it has infinite endurance and its incremental semiconductor wafer process cost is relatively low. Microcontroller embedded memory technology Since the emergence of microcontrollers, many different memory technologies have been used. Almost all microcontrollers have at least two different kinds of memory, a non-volatile memory for storing firmware and a read-write memory for temporary data. Data From the earliest microcontrollers to today, six-transistor SRAM is almost always used as the read/write working memory, with a few more transistors per bit used in the  register file.  MRAMcould potentially replace it as it is 4-10 times denser which would make it more cost effective. In addition to the SRAM, some microcontrollers also have internal EEPROM for data storage; and even ones that do not have any (or not enough) are often connected to external serial EEPROM chip (such as the  BASIC Stamp) or external serial flash memory chip. A few recent microcontrollers beginning in 2003 have self-programmable flash memory[6]. Firmware The earliest microcontrollers used hard-wired or mask ROM to store firmware. Later microcontrollers (such as the early versions of the  Freescale 68HC11  and early  PIC microcontrollers) had quartz windows that allowed ultraviolet light in to erase the  EPROM. The Microchip  PIC16C84, introduced in 1993,[7]  was the first microcontroller to use  EEPROM  to store firmware. Also in 1993, Atmel introduced the first microcontroller using  NOR Flash memory  to store firmware.[6] PSoC  microcontrollers, introduced in 2002, store firmware in  SONOS  flash memory. MRAM  could potentially be used to store firmware.

Comparing Narrative of the Life of Frederick Douglass and Invisible Man

Comparing Narrative of the Life of Frederick Douglass and Invisible Man      Ã‚  Ã‚   The Black Revolution has occurred for quite some time and in many different ways, the most prominent being in literature. Two primary examples of the struggle and yearn for change among African Americans include Narrative of the Life of Frederick Douglass, An American Slave, the autobiography of Frederick Douglass and Invisible Man, a novel written by Ralph Ellison. Although both have the same foundation, the difficult task of being black and trying to make something of one's life, many important differences exist between these works. First, the language used by the authors is strikingly dissimilar. Next, the time periods in which these pieces of literature were written have a difference of over one hundred years. Finally, the main characters are faced with different circumstances and injustices. First, the language and literary devices used by the two authors are very different. In his autobiography, Frederick Douglass uses a very educated language and makes his story able to be un...

Human Nature in Lord of the Flies :: Free Essay Writer

Human Nature in Lord of the Flies Good morning/afternoon Mrs. Visser and class, I will be speaking about human nature and what it means to be human. Now what does it truly mean to be human and what makes us human? The main thing about humanity is we see ourselves as superior to nature and the animals in it. We see this in Lord of the Flies when the boys first land on the island. Even though there are animals and plants on the island they disregard it and claim the island as their own. Now what would make man superior to nature, his ability to think? To alter his surroundings to make his life easier? Arrogance or how about that it is how it is always been? Man seems to try and force his views upon others, through different means. Jack for example uses fear and manipulation to control his tribe, while Ralph hung onto the values he was taught in society. Now behind Ralph was piggy, who in the novel represented man’s knowledge and civilized man’s ideals. He was the one Ralph turned to when he was in doubt about what he must do, about what the civilized thing to do would be. Behind Jack was Rodger who represented the savagery and nature instinct that a human has to survive. Simon represented the spirituality and nature in the book. Simon is also one of those that seek the truth. When the beast is mentioned, he was the first and only person until later on to suggest that the beast was human’s. He was the first person to see that the beast was an internal thing. People like Simon who seek the truth soon find that they are not accepted in society. Simon was laughed at when he suggested that the beast was internal. It is in human nature to try and blame something else for our mistakes. This separates him and makes him an outsider as it is in human nature not to accept the truth. Later on when he finds out who and what the beast is, all the boys help to attack and kill him. This shows that it is in human nature to reject the truth as a lie or even insanity. When Simon dies it shows the death of spirituality and a foreshadowing of what the inherit evil in man will do to nature later on. The inherit evil in man is represented by in the following ways by the following people:

Mixed Schools Essay

Education is the most powerful weapon which people can use to change the world. Mixed school, also known as co-educational schools is seen to be beneficial for both sexes. Therefore academic performance in a mixed school is likely to be seen good as compared to a single sex school. This is due more social and academical interaction between the two sexes, and also students starts to get more self-esteem. However, it is important to recognize that a mixed school is not the answer to all academic purposes due to social interaction because it also presents some important disadvantages as well as the usual advantages. These essay theories the arguments against and for mixed school. Firstly, peer pressure is a common disadvantage found in a mixed school. Although interacting and socializing with peers is good, but into some extent it can be bad because some students can be easily lead to breaking rules. Therefore academic performances can suddenly decrease as students’ starts to con centrate on unnecessary things such as truancy. These shows lack of judgment and discipline thoughts and actions effects decision that a student have, thus peer pressure will contradict the set of behavior that is worth living. In many schools ,there are students indulging and involving themselves in peer pressure and their actions often reveals lack of moral and discipline in them (Toru, 2001). For instance, students start to play truant and follows friends to do unnecessary staff such as smoking or playing with other students etc. In these case students have to be monitored well by teachers in order to prevent students from playing truancy during school hours. Therefore students should be cautious, on how they interpret and socialize with their peers or otherwise they will be influenced and motivated by their peers that allow distractions into their academic curriculum. Additionally, the second point is Gender Violence .In mixed school students are more concerned with relationship than academic purposes. Some students, especially the senior students have in mind that it is necessary to have a relationship .This students will be concerned with how they look to make them attractive to others promoting their desires to the opposite sex. Having relationships is said to be an influential factor towards students’ academic work and relationship is present in all schools and teachers cannot do much about it for such an issue is not their concerned business. If we look precisely in the world that is constantly  changing ,students adapt to different learning environment that determine their capabilities of becoming a successful learner diminish at appoint when they starts to have relationships .With relationships students get to experiences sexual longings that turns negative at the end. For instance, statistics in schools in Canada show that we are two Canadian women will experiences at least one incident of physical or sexual violence in lifetime .Obviously the signs are there to in dicate a fragmented society, but students should drown in a sea of negativity and mobilize against sexual violence (Ann, 2012). Education is the key and it must be a vital part of awareness campaigns in mixed schools, our many neighborhoods and public meeting places for religious and cultural and recreational activities. Furthermore, the third point is that mixed school does not combat segregation. Mixing primary schools can only be successful if neighborhoods are mixed as well and only primary school is mixed and secondary are not. Mixing is hard to achieve because freedom is threatened by enforcing mixing schools. Mixing schools makes teachers work more complex, because politicians are afraid that too much attention is being paid to mixing and not enough to good education. Solving the problem of segregation is not the primary responsibility of education and society cannot be shaped, and class differences will therefore always exist (Gopal, 2013). Politicians think that mixing is unnecessary, a mixed school demands a lot from teachers: specific skills, affinities, time and energy and in addition to being an educator, teachers need to fulfill childrearing and social worker tasks. However, this essay has considered disadvantages (against) mixed school and will now consider the advantages (for).Mixed schools improves students’ academic performances through social interaction skills during school hours with opposite sex. Therefore mixing increases students’ opportunities to develop. Equally, the advantages of mixed school are that mixing increases student’s opportunities to develop. Weaker students can benefit from the support of stronger student’s and stronger students can learn more by explaining lesson materials to weaker students. Students will diverse backgrounds get the same opportunities for good education. Beside it increases opportunities for disadvantage students, while retaining these for advantage students. It can reduce the social and cultural gap between students where they contact with societies diversities at an early age. They  learn to get along with people of varied cultural and socio-economic backgrounds. Another point is that parents want the best for their child to grow up in an environment that has the least amount of segregation possible. Parents feel that sending their children to a mixed school will help them learn how to cope with diversity. It also has advantage for parents, where they do not have to flee to a non-mixed school just for their children to cope with diversity. Parents from diverse background come in contact with one another that somehow promote cultural wellbeing for various cultural purposes. Mixing is a way of fighting segregation that promotes the acceptance of diversity in society. It also contributes to the emancipation of cultural minorities and disadvantaged groups. Finally, letting boys and girls go to mixed schools makes both genders mingle with each other and impose a positive influence on interpersonal relationship when being in front of the other. For instance, a female student in a mixed school would not have a feeling of shy or embarrassment, but instead have confidence when having a conversation with a male student. The experiences that students in a mixed school have is that, when the two opposite sexes are studying together in the same school, it will certainly be an advantage for them, when they start working since both of the sexes have many opportunities to work together in modern society. Thus, boys and girls would benefit from attending mixed schools because they can practice their social interaction skills. In conclusion, there are disadvantages and advantages of mixed school where by the disadvantages are peer pressure, Gender violence and combat segregation. The advantages of mixed school are that mixing increases students’ opportunities to develop; secondly parents want the best for their children and lastly students gaining more confidence .However, according to the advantages, mixed schools increase the progressing of students’ academic work by the social interaction between the two sexes. In addition, this helps students to gain more confidence in them. So as attending a mixed school students tend to get high self-esteem. As to finish off it is true that mixed school increase academic purposes.