Essay --

I’ve heard it said that even the greatest of men are wise enough to fear the dark; whether that fear is rational or not, I’m not sure I’m worthy to judge. But until you’ve felt the dark and experienced the cold depths of it enveloping your soul, I’m not really sure you truly know what it is to fear. Manhattan, New York, 1977. The sweltering July summer left the dense city feeling sluggish and apathetic. I’d spent the day switching between my new television set and my open window (of course our a/c would break in the hottest month of the year), and I planned on walking a few blocks over to my friend’s house so I could spend the night in her wonderful air conditioned home. My mom was at work, probably wouldn’t be back until dawn, and so I was alone when dusk came, the sky still aglow from the bright lights of the city and the last remnants of daylight. I grabbed my duffel bag and headed out, eager to get to Jenny’s and relax in the cool air. I had just stepped into the hallway outside the apartment when it happened; there was a sort of jolt in the air. Suddenly, a buzzing noise could be heard, growing louder each passing second, as if someone was turning up the bass on an exponentially-loud amplifier. As the sound grew in decibels, the lights in the hallway flickered and became brighter, brighter, brighter, so bright I had to wince to look up at them. I swung open the door to the apartment to find all the lights on full blast, shining so brightly my skin began to burn. Slamming the door shut, I slid 2 down to the floor in the hallway and shut my eyes tight, too frightened to leave my apartment building. I was scared, sure, but soon I would find out what real fear feels like. A few minutes passed when, finally, the glare behind m... ...e, when I saw a single figure hunched over on the subway bench. Every instinct in my mind told me not to approach the shade before me. I pictured ghosts and spirits around it, waiting to prey on me, the Good Samaritan, very, very, far from Kansas. But I knew that I had to reach out and touch her, my mother had taught me that much. At their darkest hour, the wisest of men are no different than us, the same battery acid pumps through their veins, and the same fear cripples them. What we all feel together remains unanimous. At that moment, when I reached out to that sobbing woman, I saw my mother, and that dark subway tunnel was brighter than any human eye could have observed. There we sat together, until the lights shuttered their return, holding one another in utter darkness, not saying a word or identifying each other, but hearing and seeing the love between us.

Characterstics of Laptop

Answer: Portability is usually the first feature mentioned in any comparison of laptops versus desktop pcs. Physical portability allows that a laptop can be used in many places† not only at home and at the office, but also during commuting and flights, in coffee shops, In lecture halls and libraries, at clients' location or at a meeting room, etc. The portability feature offers several distinct advantages: a.Productivity: Using a laptop in places where a desktop PC cannot be used, and at times that would otherwise be wasted. For example, an office worker Is managing heir e-mails during an hour-long commute by train, or a student doing his/her homework at the university coffee shop during a break between lectures. b. Immediacy: Carrying a laptop means having instant access to various Information, personal and work files. Immediacy allows better collaboration between coworkers or students, as a laptop can be flipped open to present a problem or a solution anytime, anywhere. . up- to-date information: If a person has more than one desktop PC, a problem of synchronization arises: changes made on one computer are not automatically propagated to the others. There are ways to resolve this problem, Including physical transfer of updated files (using a USB flash memory stick or cdrs) or using synchronization software over the Internet. However, using a single laptop at both locations avoids the problem entirely, as the files exist in a single location and are always up-to-date. d.Connectivity: A proliferation of WI-FI wireless networks and cellular broadband data services (HSDPA, EVDO and others) combined with a near-ubiquitous support by laptops means that a laptop can have easy Internet and local network connectivity while remaining mobile. Wi-Fi networks and laptop programs are especially idespread at university campuses. [ Other advantages of laptops: e. Size: Laptops are smaller than desktop pcs. This is beneficial when space is at a premium, for example in sm all apartments and student dorms.When not In use, a laptop can be closed and put away. f. Low power consumption: Laptops are several times more power-efficient than desktops, A typical laptop uses 20-90 W. compared to 100-800 W for desktops. This could De partlcularly DeneTlclal Tor Duslnesses (wnlcn run nunareas 0T personal computers, multiplying the potential savings) and homes where there is a computer running 2417 (such as a home media server, print server, etc. g. Quiet: Laptops are often quieter than desktops, due both to the components (quieter, slower 2. -inch hard drives) and to less heat production leading to use of fewer and slower cooling fans. h. Battery: a charged laptop can continue to be used in case of a power outage and is not affected by short power interruptions and blackouts. A desktop PC needs a UPS to handle short interruptions, blackouts and spikes; achieving on-battery time of more than 20-30 minutes for a desktop PC requires a large and expensive UPS. i. Al l-in-One: designed to be portable, laptops have everything integrated into the hassis.For desktops (excluding all-in-ones) this is divided into the desktop, keyboard, mouse, display, and optional peripherals such as speakers. 2. Characteristics of Super Computer: A) A supercomputer is the fastest type of computer. Supercomputers are very expensive and are employed for specialized applications that require large amounts of mathematical calculations. The chief difference between a supercomputer and a mainframe is that a supercomputer channels all its power into executing a few programs as fast as possible, whereas a mainframe uses its power to execute many programs concurrently.B) Supercomputers are used for highly calculation-intensive tasks such as problems involving quantum mechanical physics, weather forecasting, climate research, molecular modeling (computing the structures and properties of chemical compounds, biological macromolecules, polymers, and crystals), physical simulati ons (such as simulation of airplanes in wind tunnels, simulation of the detonation of nuclear weapons, and research into nuclear fusion), cryptanalysis, and many others. Some supercomputers have also been designed for very specific functions like cracking codes and playing chess; Deep Blue is a famous chess-playing upercomputer.Major universities, military agencies and scientific research laboratories depend on and make use of supercomputers very heavily. C) A supercomputer generates large amounts of heat and therefore must be cooled with complex cooling systems to ensure that no part of the computer fails. Many of these cooling systems take advantage of liquid gases, which can get extremely cold. D) Another issue is the speed at which information can be transferred or written to a storage aevlce, as tne speed 0T data transTer wlll Ilmlt tne supercomputers performance. Information cannot move faster than the speed of light between two arts of a supercomputer.E) Supercomputers consum e and produce massive amounts of data in a very short period of time. Much work on external storage bandwidth is needed to ensure that this information can be transferred quickly and stored/retrieved correctly. 3. Characterstics of Main Frame Computer? a. Modern mainframes can run multiple different instances of operating systems at the same time. This technique of virtual machines allows applications to run as if they were on physically distinct computers. In this role, a single mainframe can replace higher-functioning hardware services available to conventional servers.While mainframes pioneered this capability, virtualization is now available on most families of computer systems, though not always to the same degree or level of sophistication b. Mainframes can add or hot swap system capacity without disrupting system function, with specificity and granularity to a level of sophistication not usually available with most server solutions. c. Modern mainframes, notably the IBM zSeri es,System z9 and System ZIO servers, offer two levels of virtualization: logical partitions (LPARs, via the PRISM facility) and virtual machines (via the zPv'M operating system).Many mainframe customers run wo machines: one in their primary data center, and one in their backup data center †fully active, partially active, or on standby†in case there is a catastrophe affecting the first building. Test, development, training, and production workload for applications and databases can run on a single machine, except for extremely large demands where the capacity of one machine might be limiting. Such a two- mainframe installation can support continuous business service, avoiding both planned and unplanned outages.In practice many customers use multiple mainframes linked either by Parallel Sysplex and shared DASD (in IBM's case)[citation eeded], or with shared, geographically dispersed storage provided by EMC or Hitachi. d. Mainframes are designed to handle very high volume i nput and output (1/0) and emphasize throughput computing. Since the late-1950s, mainframe designs have included subsidiary hardware (called channels or peripheral processors) which manage the 1/0 devices, leaving the CPU free to deal only with high-speed memory. It is common in mainframe shops to deal with massive databases and files.Gigabyte to terabyte-size record files are not unusual. [7] Compared to a typical PC, mainframes ommonly have hundreds to thousands of times as much data storage online, and can access it much faster. [citation needed] Other server families also offload 1/0 processing ana empnaslze tnrougnput computlng. e. Mainframe return on investment (ROI), like any other computing platform, is dependent on its ability to scale, support mixed workloads, reduce labor costs, deliver uninterrupted service for critical business applications, and several other risk- adjusted cost factors. . Mainframes also have execution integrity characteristics for fault tolerant comput ing. For example, z900, z990, System z9, and System ZIO servers ffectively execute result-oriented instructions twice, compare results, arbitrate between any differences (through instruction retry and failure isolation), then shift workloads â€Å"in flight† to functioning processors, including spares, without any impact to operating systems, applications, or users.This hardware-level feature, also found in HP's Nonstop systems, is known as lock-stepping, because both processors take their â€Å"steps† (i. e. instructions) together. Not all applications absolutely need the assured integrity that these systems provide, but many do, such as financial transaction processing.

Diagnosis of Infected Patient Essay - 678 Words

M21 Essay: Diagnosis of an Infected Patient Essay As we know bacteria comes in various classes and are distinguished by their shapes, chemical configuration, source of energy either sunlight or chemicals, nutritional requisites and biochemical actions. We have a patient that may be infected with an unknown bacterial infection; we’ve collected a sputum sample and will be testing for one of the following genera: Bacillus, Escherichia and Mycoplasma. In order to determine which one of the three may be the source of the infection we have to recognize the characteristics of each one and the staining protocol needed to identify them. All three of the above mentioned genera are considered to be members of the Prokaryotic cell family†¦show more content†¦Let’s begin with Mycoplasma because this genera has a very thin or lacks a cell wall we will consider this a â€Å"Gram- positive† bacteria. If mycoplasma retains its structure, size and capsules that’s an indication of the type of bacteria causing the infection in the patient. Bacillus are part of the prokaryotic cell family containing a thin layer of peptidoglycan; however they are spore forming; this trait helps to identify them as â€Å"gram-positive†. Step (1) in the staining process is adding the sputum to the slide, step (2) is applying heat to the sample, step (3) adding crystal-violet dye which turns the cytoplasm cells purple and applying mordant to the specimen, step (4) wash with de-coloring solution (alcohol) which causes the peptidoglycan to become more impermeable crystal –violet and iodine, step (5) counterstain is absorbed and is masked by the primary purple dye that was previously absorbed by the â€Å"gram-positive† cells (pg. 86). It’s during this step when the microbes are identified. While the bacillus is in the aging process some cells die and give the appearance of gram-negative bacteria; these are known as â€Å"gram-variable† (Tortora, 2013). Escherichia (E.coli) these rod shaped microorganisms have a thick outer membrane; however they are non-spore forming; therefore they are considered â€Å"gram-negative† cells. The steps in the staining of â€Å"gram-negative†Show MoreRelatedDiagnosis of an Infected Patient Essay1061 Words   |  5 PagesDiagnosis of an Infected Patient Infection is the invasion and growth of microorganisms such as bacteria, viruses, and parasites that are not normally present within the body. A prokaryotic cell is a simple cell that does not have a nucleus. One of the most common types of prokaryotic cells is a bacterium. Bacteria are differentiated by many factors including shape, chemical composition, nutritional requirements, biochemical activities, and sources of energy (Tortora 76). 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