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Gua Krubera, Gua yang Paling Dalam di Dunia Sehingga Digelar ‘Pintu Masuk ke Dalam Kerak Bumi’









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Choose the Right Platform For Your Mission Critical Computer and Software System Do you need to build a major system to handle mission critical work for your business? Are you starting with a blank slate, so the first thing you have to ask your technical team is what platform and tools to use? Selecting the right foundations and tools are among your most crucial decisions. Your starting point is probably not hardware. Think about what your system must do, and the resources you have for building it. You must decide which trade-offs make the most sense for you. Strictly speaking, some of your choices are not directly about the demands of your project. Some involve the future availability of upgrade paths, spare parts and expertise. Plenty of expertise is available in the marketplace for the tools that are most popular right now; but if those tools are not suitable for your needs, lots of readily available labor will not compensate for shortcomings in the tools. So let's begin by looking at the foundation of your system--the operating system. What operating system is best suited? That will narrow the hardware and tools you can use. A few options: * If rebooting once or twice a month to install patches is acceptable, you may want something ubiquitous and comparatively inexpensive like Windows. * If processing speed and low overhead are important, and you have access to the right technical expertise, you may prefer UNIX. * If the system must handle enterprise-class communications and data volume for business applications, you may want AS400 on a mainframe. * If downtime is intolerable, you may need a special disaster-tolerant platform. Sometimes Old Tools Are Just Right While you consider this, try not to restrict your thinking to the newest products. Why? Here are a couple of examples: When the World Trade Center came down in 2001, CommerzBank's headquarters were located less than a hundred yards away. CommerzBank was running its most essential banking applications on a properly configured OpenVMS wide-area cluster with shadowed (mirrored) disks. In an OpenVMS cluster, multiple computers act as though they are a single computer. Processing work and storage are spread across and shared by the member computers. The bank could lose a data center without a noticeable blip, so it had no interruption in service. With appropriate hardware and communication lines, computers in a cluster can be up to 500 miles apart--great for disaster redundancy. OpenVMS is about 30 years old. It is highly secure and so robust that its computers commonly run for years between reboots. Many recent graduates have no idea what it is, cannot conceive of running five years without rebooting, and have never seen a "more modern" operating system capable of doing what the CommerzBank cluster did. By contrast, due to Tropical Storm Allison in June 2001, flooding and a fire in Houston, Texas, took down both the primary and backup power sources for a major electronic transfer system. The system services a large percentage of automatic teller machine and point-of-sale transactions in 22 states. Those computers ran a more popular, lower cost operating system. Although disaster recovery plans were in place and a disaster data center was ready in the Dallas area, bringing the secondary data center online and resuming service took days. University Education and Real-World Experience Now you know why you should double check the opinions of your staff when you ask them to recommend the operating system, programming language, database engine, and other tools to be used in building your system. Double checking is especially important if your staff is young or has a tightly focused range of experience. There are distinct limits to how much anyone can learn in a specific period of time, and computing is a vast field. No university can teach its computer science graduates everything about computing. For that matter, even the most experienced top notch computer expert can't know it all, either--but the experienced expert has been learning a lot longer. Independent experts have often seen a wider range of technologies and ways of applying them than people in typical jobs, because independents get to see how more companies and groups approach their projects and how the projects turn out. Fair warning: Some distinctly technical talk is next, but stick with me. This real life story will help you see what you need to find out before making your foundation decisions, and why. At one project, the group I worked with tied itself in knots trying to take care of a procedural application written in C. That is a relatively low level language, not far above machine code. It would have been clean, easy code to maintain in a higher level procedural language such as FORTRAN. On the computer and operating system we were using, on average each line of C generated only 3 lines of machine code. Each line of FORTRAN generated 8, which means FORTRAN took care of a lot of details but C required the human programmer to do nearly all the details. That meant C left many more chances for the programmer to make mistakes. To make matters worse, a portion of the software had attempted to make the procedural language C behave like the object oriented language C++. It was convoluted and difficult for even the most senior programmers to update. Eventually, the boss of the group told me that he was a programmer not long out of college when that software was conceived. He knew C and C++ from his degree studies, so that was what he recommended. He thought C++ was great, but the company was only willing to provide C. He personally wrote the especially ugly portion that tried to mimic C++. He admitted those were mistakes, especially the C++ imitation. It should have been done in a higher level procedural language, where mistakes would be less common and the code would be easier to understand. Now he had to live with the budget and resource strains that came from his decision. He made choices which were harder to maintain than other choices that were available, simply because he did not know about the other options and did not think to inquire about them. For well designed, well built software, you can reasonably expect about 20% of its lifetime cost to go into creating it. About 80% of the cost is maintenance and enhancement. By making a less maintainable choice, he increased the lifetime cost of the system substantially. He shook his head. "I didn't know any better. That was what I knew from college. All of us were right out of school. Nobody else knew any better, either." A Little Outside Opinion Goes A Long Way You can still use a young team to build your system. There are some good reasons to want youth on the team--energy, creativity, comfort with some of the latest software. Besides, if your team is young when they build the system, you have the potential to keep original expertise on hand for a long time. Don't skip the double checking, though. It's worth your while to bring in a consultant to look at what you want to do and give you some advice. Even if you don't keep the consultant involved for the whole project, at least the consultant's experience can help you make sure you're going to use the right foundation. When you're tempted to skip that step, just think about how much that shortcut can cost in the long run.

10 Easy Steps to Succeed in Your Online Classes

Congratulations Youve made up our minds to pursue your upper schooling, and doing so online is how to pass if you have an interest in a versatile, studentcentered educating manner. Studying online permits you to pursue different pursuits and attend to different responsibilities whilst nonetheless operating your method towards some extent. However, it will now and again imply that its clean to get distracted. Here are 10 clean steps to verify luck on your online categories.

  1. Connect together with your instructors once conceivable. Even in case you are doing smartly within the category, its extraordinarily vital to increase a rapport together with your trainer. When you do that early on, you temporarily understand what the priorities are within the route, what expectancies the professor has of you and youre going to be motivated to prevail, surer of whats forward and higher ready to do smartly with the impending subject material.

Valuable questions to invite your trainer come with the next

How versatile are you with time limits How versatile are you with grownup freshmen What applied sciences do you employ within the route How to be had are you through e mail and different sorts of verbal exchange How do you put up an internet neighborhood and what are the expectancies for participation in it In addition, since instructors are to be had to lend a hand all over the classes, its all the time just right to have had private touch with the trainer early on. This method, when you wish to have lend a hand, its more straightforward to achieve out and get the help you wish to have.

  1. Confirm the technical necessities of the route. Online categories can also be very advisable for college kids with busy schedules, however provided that they are able to simply get right of entry to the fabrics. It is vital to obviously perceive what the technical necessities are. So, ahead of the route begins or as quickly thereafter as conceivable, youll want to test that your pc will paintings with the entire online equipment, and that you understand how to navigate them. This will be sure that you dont must spend time all the way through the route attempting to determine the generation.

three. Create a time table and stick with it. Quality online instructors create classes which might be clean to navigate and feature transparent expectancies. Having that roughly easytodealwith framework in position will make learning and succeeding that a lot more straightforward. However, although the framework and necessities of your category arent as transparent, youll create a time table and construction, which is able to very much fortify your probabilities of luck within the route. Using equipment equivalent to Google Calendar is a good way to start out. Knowing how your weeks and months glance and scheduling blocks of analysis time for each and every activity or module will will let you stick with a time table.

four. Ask questionsall the time. When you dont perceive, ask questions. When you do perceive, ask additional questions. Instructors recognize scholars who take part, and if theres a participation or dialogue part a part of the grade, then asking high quality questions is helping guarantee your grade on this space. Even if there isnt a participation part, its all the time helpful to invite inquiries to remember to perceive the fabric and are transparent on what is needed of you.

five. Be arrangedand keep arranged. Students whore taking conventional, campusbased classes most often have a constant time table to observe each and every week, through which study room instruction is adopted through assignments out of doors the category. However, for online classes, scholars will have to search out their very own techniques to stick on most sensible in their paintings. It is crucial that you just be arranged from the start of the semester with the intention to achieve success in an internet route. For instance mark task due dates on your calendar, discover a submitting machine for each online subject material and bodily subject material that is helping you stay monitor of the whole lot simply, and shed light on find out about schedules that duvet sections of the route one by one so youve got an arranged tactic to protecting the semesters subject material as you pass alongside.

  1. Have a blank, quiet, and constant workspace. One factor online and inclass classes have in not unusual is that scholars all the time want a spot to review or whole assignments this is blank, quiet, and constant. You can select the place that is for youwhether or not its at a espresso store, a college library, a devoted place of business, or at house. Wherever you select to review and whole assignments, you must make it a constant location that doesnt have out of doors distractions. It is basically key that where is quiet and lets you focal point in your paintings with out distractions.
  2. Do no longer procrastinate. Successful distance freshmen hardly procrastinate. They dont do away with assignments or wait till the final second to write down their papers. Successful online scholars experience freedoms that come with operating at their very own tempo and the facility to finish their paintings in as a lot time because it takes them. On the opposite hand, they know that finishing their assignments is best performed early and on time cramming merely doesnt paintings, and it doesnt will let you retain knowledge longterm. Get began early on getting a success.

eight. Work in your studying comprehension. Successful distance freshmen generally tend to have just right studying comprehension abilities. Most conventional, campusbased scholars concentrate to lectures and take notes, and a few online classes additionally require this. However, the vast majority of distance freshmen are anticipated to grasp subject material thru a large amount of studying. Although far finding out classes be offering video recordings and audio clips, maximum systems require scholars to hide and grasp a considerable amount of written knowledge. If it is a problem for you, it could be very useful to first sign up in a studying comprehension route there are lots of assets online that will help you do that. This ability by myself could make a huge distinction on your luck.

nine. Establish and admire routines that be just right for you. If, for instance, youre employed best within the morning or in brief bursts, then set find out about routines that can help you find out about within the prelunch hours when your mind is contemporary. If, then again, you do best through learning at evening or at the weekends when youll devote nightowl hours or longer blocks in your learning, then make it some degree to take action. Consider how and whilst you paintings best, and enforce a find out about plan that respects the routines that be just right for you.

  1. Connect together with your friends. Establishing sturdy connections with friends and professors is a very powerful facet of tutorial luck, in addition to skilled development. One of essentially the most rewarding reports in schooling is finding out thru collaboration. Forming significant relationships together with your friends and professors can can help you be told extra, keep motivated, and feature an outlet to specific your personal working out of subject material. So, keep attached thru message forums, chat rooms, e mail, and different digital assets. And take note lots of the other people you meet in faculty shall be conceivable process assets down the road so determine connections and keep in contact

Florida National University gives a wealth of tutorial and professional online classes. Check out the entire choicesyour long run is ready

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