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Showing posts with label Just Repost. Show all posts

Metacognition

Metacognition is defined as "cognition about cognition", or "knowing about knowing". It can take many forms; it includes knowledge about when and how to use particular strategies for learning or for problem solving.There are generally two components of metacognition: knowledge about cognition, and regulation of cognition.

Metamemory, defined as knowing about memory and mnemonic strategies, is an especially important form of metacognition. Differences in metacognitive processing across cultures have not been widely studied, but could provide better outcomes in cross-cultural learning between teachers and students.

Some evolutionary psychologists hypothesize that metacognition is used as a survival tool, which would make metacognition the same across cultures. Writings on metacognition can be traced back at least as far as De Anima and the Parva Naturalia of the Greek philosopher Aristotle.

 J. H. Flavell first used the word "metacognition".He describes it in these words:

    Metacognition refers to one’s knowledge concerning one's own cognitive processes and products or anything related to them, e.g., the learning-relevant properties of information or data. For example, I am engaging in metacognition if I notice that I am having more trouble learning A than B; [or] if it strikes me that I should double check C before accepting it as fact.
    —J. H. Flavell (1976, p. 232).

A. Demetriou, in his theory, one of the neo-Piagetian theories of cognitive development, used the term hypercognition to refer to self-monitoring, self-representation, and self-regulation processes, which are regarded as integral components of the human mind. Moreover, with his colleagues, he showed that these processes participate in general intelligence, together with processing efficiency and reasoning, which have traditionally been considered to compose fluid intelligence.

Metacognition also thinks about one's own thinking process such as study skills, memory capabilities, and the ability to monitor learning. This concept needs to be explicitly taught along with content instruction. Metacognitive knowledge is about our own cognitive processes and our understanding of how to regulate those processes to maximize learning. Some types of metacognitive knowledge would include: 1. Person knowledge (declarative knowledge) which is understanding one's own capabilities. 2. Task knowledge (procedural knowledge) which is how one perceives the difficulty of a task which is the content, length, and the type of assignment. 3. Strategic knowledge (conditional knowledge) which is one's own capability for using strategies to learn information. Young children are not particularly good at this; it is not until upper elementary where students start to develop the understanding of strategies that will be effective.

Different fields define metacognition very differently. Metacognition variously refers to the study of memory-monitoring and self-regulation, meta-reasoning, consciousness/awareness and auto-consciousness/self-awareness. In practice these capacities are used to regulate one's own cognition, to maximize one's potential to think, learn and to the evaluation of proper ethical/moral rules.

In the domain of experimental psychology, an influential distinction in metacognition (proposed by T. O. Nelson & L. Narens) is between Monitoring—making judgments about the strength of one's memories—and Control—using those judgments to guide behavior (in particular, to guide study choices). Dunlosky, Serra, and Baker (2007) covered this distinction in a review of metamemory research that focused on how findings from this domain can be applied to other areas of applied research.

In the domain of cognitive neuroscience, metacognitive monitoring and control has been viewed as a function of the prefrontal cortex, which receives (monitors) sensory signals from other cortical regions and through feedback loops implements control (see chapters by Schwartz & Bacon and Shimamura, in Dunlosky & Bjork, 2008).

Metacognition is studied in the domain of artificial intelligence and modelling. Therefore, it is the domain of interest of emergent systemics. It has been used, albeit off the original definition, to describe one's own knowledge that we will die. Writers in the 1990s involved with the musical "grunge" scene often used the term to describe self-awareness of mortality.[citation needed]
 
* Components
Metacognition is classified into three components:
 
Metacognitive knowledge (also called metacognitive awareness) is what individuals know about themselves and others as cognitive processors.Metacognitive regulation is the regulation of cognition and learning experiences through a set of activities that help people control their learning. Metacognitive experiences are those experiences that have something to do with the current, on-going cognitive endeavor.

Metacognition refers to a level of thinking that involves active control over the process of thinking that is used in learning situations. Planning the way to approach a learning task, monitoring comprehension, and evaluating the progress towards the completion of a task: these are skills that are metacognitive in their nature.

Metacognition includes at least three different types of metacognitive awareness when considering metacognitive knowledge:
 
Declarative Knowledge: refers to knowledge about oneself as a learner and about what factors can influence one's performance. Declarative knowledge can also be referred to as "world knowledge".
 
Procedural Knowledge: refers to knowledge about doing things. This type of knowledge is displayed as heuristics and strategies.A high degree of procedural knowledge can allow individuals to perform tasks more automatically. This is achieved through a large variety of strategies that can be accessed more efficiently.
 
Conditional knowledge: refers to knowing when and why to use declarative and procedural knowledge.It allows students to allocate their resources when using strategies. This in turn allows the strategies to become more effective.

Similar to metacognitive knowledge, metacognitive regulation or "regulation of cognition" contains three skills that are essential.
 
Planning: refers to the appropriate selection of strategies and the correct allocation of resources that affect task performance.

Monitoring: refers to one's awareness of comprehension and task performance 

Evaluating: refers to appraising the final product of a task and the efficiency at which the task was performed. This can include re-evaluating strategies that were used.

Similarly, maintaining motivation to see a task to completion is also a metacognitive skill. The ability to become aware of distracting stimuli – both internal and external – and sustain effort over time also involves metacognitive or executive functions. The theory that metacognition has a critical role to play in successful learning means it is important that it be demonstrated by both students and teachers.

Students who demonstrate a wide range of metacognitive skills perform better on exams and complete work more efficiently. They are self-regulated learners who utilize the "right tool for the job" and modify learning strategies and skills based on their awareness of effectiveness. Individuals with a high level of metacognitive knowledge and skill identify blocks to learning as early as possible and change "tools" or strategies to ensure goal attainment. Swanson (1990) found that metacognitive knowledge can compensate for IQ and lack of prior knowledge when comparing fifth and sixth grade students' problem solving. Students with a high-metacognition were reported to have used fewer strategies, but solved problems more effectively than low-metacognition students, regardless of IQ or prior knowledge.

Metacognologists are aware of their own strengths and weaknesses, the nature of the task at hand, and available "tools" or skills. A broader repertoire of "tools" also assists in goal attainment. When "tools" are general, generic, and context independent, they are more likely to be useful in different types of learning situations.

Another distinction in metacognition is executive management and strategic knowledge. Executive management processes involve planning, monitoring, evaluating and revising one's own thinking processes and products. Strategic knowledge involves knowing what (factual or declarative knowledge), knowing when and why (conditional or contextual knowledge) and knowing how (procedural or methodological knowledge). Both executive management and strategic knowledge metacognition are needed to self-regulate one's own thinking and learning.

Finally, there is no distinction between domain-general and domain-specific metacognitive skills. This means that metacognitive skills are domain-general in nature and there are no specific skills for certain subject areas. The metacognitive skills that are used to review an essay are the same as those that are used to verify an answer to a math question.

Metacognitive experience is responsible for creating an identity that matters to an individual. The creation of the identity with meta-cognitive experience is linked to the identity-based motivation (IBM) model. The identity-based motivation model implies that "identities matter because they provide a basis for meaning making and for action." A person decides also if the identity matters in two ways with meta-cognitive experience. First, a current or possible identity is either "part of the self and so worth pursuing" or the individual thinks that the identity is part of their self, yet it is conflicting with more important identities and the individual will decide if the identity is or is not worth pursuing. Second, it also helps an individual decide if an identity should be pursued or abandoned.

Usually, abandoning identity has been linked to meta-cognitive difficulty. Based on the identity-based motivation model there are naive theories describing difficulty as a way to continue to pursue an identity. The incremental theory of ability states that if "effort matters then difficulty is likely to be interpreted as meaning that more effort is needed." Here is an example, a woman who loves to play clarinet has come upon a hard piece. She knows that how much effort she puts into learning this piece is beneficial. The piece had difficulty so she knew the effort was needed. The identity the woman wants to pursue is to be a good clarinet player, having a metacognitive experience difficulty pushed her to learn the difficult piece to continue to identify with her identity. The entity theory of ability represents the opposite. This theory states that if "effort does not matter then difficulty is likely to be interpreted as meaning that ability is lacking so effort should be suspended." Based on the example of the woman playing the clarinet, if she did not want to identify herself as a good clarinet player, she would not have put in any effort to learn the difficult piece which is an example of using metacognitive experience difficulty to abandon an identity.
 
* Relation to sapience

Metacognologists believe that the ability to consciously think about thinking is unique to sapient species and indeed is one of the definitions of sapience.[citation needed] There is evidence that rhesus monkeys and apes can make accurate judgments about the strengths of their memories of fact and monitor their own uncertainty,while attempts to demonstrate metacognition in birds have been inconclusive. A 2007 study has provided some evidence for metacognition in rats, but further analysis suggested that they may have been following simple operant conditioning principles, or a behavioral economic model.

* Metacognitive strategies

Metacognitive-like processes are especially ubiquitous when it comes to the discussion of self-regulated learning. Being engaged in metacognition is a salient feature of good self-regulated learners[citation needed]. Groups reinforcing collective discussion of metacognition is a salient feature of self-critical and self-regulating social groups[citation needed]. The activities of strategy selection and application include those concerned with an ongoing attempt to plan, check, monitor, select, revise, evaluate, etc.

Metacognition is 'stable' in that learners' initial decisions derive from the pertinent fact about their cognition through years of learning experience. Simultaneously, it is also 'situated' in the sense that it depends on learners' familiarity with the task, motivation, emotion, and so forth. Individuals need to regulate their thoughts about the strategy they are using and adjust it based on the situation to which the strategy is being applied. At a professional level, this has led to emphasis on the development of reflective practice, particularly in the education and health-care professions.

Recently, the notion has been applied to the study of second language learners in the field of TESOL and applied linguistics in general (e.g., Wenden, 1987; Zhang, 2001, 2010). This new development has been much related to Flavell (1979), where the notion of metacognition is elaborated within a tripartite theoretical framework. Learner metacognition is defined and investigated by examining their person knowledge, task knowledge and strategy knowledge.

Wenden (1991) has proposed and used this framework and Zhang (2001) has adopted this approach and investigated second language learners' metacognition or metacognitive knowledge. In addition to exploring the relationships between learner metacognition and performance, researchers are also interested in the effects of metacognitively-oriented strategic instruction on reading comprehension (e.g., Garner, 1994, in first language contexts, and Chamot, 2005; Zhang, 2010). The efforts are aimed at developing learner autonomy, interdependence and self-regulation.

Metacognition helps people to perform many cognitive tasks more effectively.[1] Strategies for promoting metacognition include self-questioning (e.g. "What do I already know about this topic? How have I solved problems like this before?"), thinking aloud while performing a task, and making graphic representations (e.g. concept maps, flow charts, semantic webs) of one's thoughts and knowledge. Carr, 2002, argues that the physical act of writing plays a large part in the development of metacognitive skills.

Strategy Evaluation matrices (SEM) can help to improve the knowledge of cognition component of metacogntion. The SEM works by identifying the declarative (Column 1), procedural (Column 2) and conditional (Column 3 and 4) knowledge about specific strategies. The SEM can help individuals identify the strength and weaknesses about certain strategies as well as introduce them to new strategies that they can add to their repertoire.

A regulation checklist (RC) is a useful strategy for improving the regulation of cognition aspect of one’s metacognition. RCs help individuals to implement a sequence of thoughts that allow them to go over their own metacogntion.[32] King (1991) found that fifth-grade students who used a regulation checklist outperformed control students when looking at a variety of questions including written problem solving, asking strategic questions, and elaborating information.

Metacognitive strategies training can consist of coaching the students in thinking skills that will allow them to monitor their own learning. Examples of strategies that can be taught to students are word analysis skills, active reading strategies, listening skills, organizational skills and creating mnemonic devices.

* Meta-Strategic Knowledge
“Meta-Strategic Knowledge” (MSK) is a sub-component of metacognition that is defined as general knowledge about higher order thinking strategies. MSK had been defined as “general knowledge about the cognitive procedures that are being manipulated”. The knowledge involved in MSK consists of “making generalizations and drawing rules regarding a thinking strategy” and of “naming” the thinking strategy.

The important conscious act of a meta-strategic strategy is the “conscious” awareness that one is performing a form of higher order thinking. MSK is an awareness of the type of thinking strategies being used in specific instances and it consists of the following abilities: making generalizations and drawing rules regarding a thinking strategy, naming the thinking strategy, explaining when, why and how such a thinking strategy should be used, when it should not be used, what are the disadvantages of not using appropriate strategies, and what task characteristics call for the use of the strategy.[36]

MSK deals with the broader picture of the conceptual problem. It creates rules to describe and understand the physical world around the people who utilize these processes called Higher-order thinking. This is the capability of the individual to take apart complex problems in order to understand the components in problem. These are the building blocks to understanding the “big picture” (of the main problem) through reflection and problem solving.[37]

* Characteristics of Theory of Mind: Understanding the mind and the "mental world": 
False beliefs: understanding that a belief is only one of many and can be false.
Appearance–reality distinctions: something may look one way but may be something else.
Visual perspective taking: the views of physical objects differ based on perspective.
Introspection: children's awareness and understanding of their own thoughts.

* Mental Illness and Metacognition 
  Sparks of Interest

In the context of mental health, metacognition can be loosely defined as the process that "reinforces one's subjective sense of being a self and allows for becoming aware that some of one's thoughts and feelings are symptoms of an illness.[38]" The interest in metacognition emerged out of a concern for an individual’s ability to understand their own mental status compared to others as well as the ability to cope with the source of their distress. These insights into an individual's mental health status can have a profound affect on the over-all prognosis and recovery. Metacognition brings many unique insights into the normal daily functioning of a human being. It also demonstrates that a lack of these insights compromises ‘normal’ functioning. This leads to less healthy functioning. In the Autism spectrum, there is a profound inability to feel empathy towards the minds of other human beings. In people who identify as alcoholics, there is a belief that the need to control cognitions is an independent predictor of alcohol use over anxiety. Alcohol may be used as a coping strategy for controlling unwanted thoughts and emotions formed by negative perceptions. This is sometimes referred to as self medication.

* Implications
Well’s and Matthew’s theory proposes that when faced with an undesired choice, an individual can operate in two distinct modes: ‘object’ and ‘Metacognitive.’ Object mode interprets perceived stimuli as truth, where Metacognitive mode understands thoughts as cues that have to be weighted and evaluated. They are not as easily trusted. There are targeted interventions unique of each patient, that gives rise to the belief that assistance in increasing metacognition in people diagnosed with schizophrenia is possible through tailored psychotherapy. With a customized therapy in place clients then have the potential to develop greater ability to engage in complex self-reflection. This can ultimately be pivotal in the patient's recovery process. In the Obsessive Compulsive Disorder spectrum, cognitive formulations have greater attention to intrusive thoughts related to the disorder. "Cognitive Self-Consciousness" are the tendencies to focus attention on thought. Patients with OCD exemplify varying degrees of these ‘intrusive thoughts.’ Patients also suffering from Generalized Anxiety Disorder also show negative thought process in their cognition.

With any metacognition strategy, the general consensus is to believe that they are good. But in all actuality some may be very harmful. Cognitive-Attentional Syndrome (CAS) characterizes a Metacognitive model of emotion disorder. CAS is consistent with the constant with the attention strategy of excessively focusing on the source of a threat. This ultimately develops through the client’s own beliefs. Metacognitive therapy attempts to correct this change in the CAS. One of the techniques in this model is called Attention Training (ATT). It was designed to diminish the worry and anxiety by a sense of control and cognitive awareness. Also ATT trains clients to detect threats, test how controllable reality appears to be.

* Works of art as metacognitive artifacts
The concept of metacognition has also been applied to reader-response criticism. Narrative works of art, including novels, movies and musical compositions, can be characterized as metacognitive artifacts which are designed by the artist to anticipate and regulate the beliefs and cognitive processes of the recipient, for instance, how and in which order events and their causes and identities are revealed to the reader of a detective story. As Menakhem Perry has pointed out, mere order has profound effects on the aesthetical meaning of a text. Narrative works of art contain a representation of their own ideal reception process. They are something of a tool with which the creators of the work wish to attain certain aesthetical and even moral effects.

Courtesy of: http://en.wikipedia.org/wiki/Metacognition

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Job Description for Network Engineering

Network engineers are responsible for installing, maintaining and supporting computer communication networks within an organisation or between organisations. Their goal is to ensure the smooth operation of communication networks in order to provide maximum performance and availability for their users, such as staff, clients, customers and suppliers.

Network engineers may work internally as part of an organisation’s IT support team or externally as part of an IT networking consultancy firm working with a number of clients.

Other job titles used to refer to this kind of work include network support, support engineer, IT support engineer, helpdesk support, network administrator, first-line support, second-line support, security engineer and network architect.

Typical work activities

The work is influenced by the size and type of the employing organisation. In a large investment bank for example, a network engineer may have specific responsibility for one area of the system. In a small company, the engineer may be troubleshooter for almost any IT-related problem that arises.

* There are different types of network, such as:
 
  1. LANs - local area networks, linking a limited area such as a home, office or small group of buildings.
  2. MANs - metropolitan area networks, linking a large area such as a campus or city
  3. WANs - wide area networks, which link nationally or internationally
  4. GANs - global area networks, combining all of the above with satellite mobile-communication technologies.

* The type of network will affect the engineer's responsibilities. Typical tasks usually include:
  1. Installing, supporting and maintaining new server hardware and software infrastructure
  2. Managing email, anti-spam and virus protection
  3. Setting up user accounts, permissions and passwords
  4. Monitoring network usage
  5. Ensuring the most cost-effective and efficient use of servers
  6. Suggesting and providing IT solutions to business and management problems
  7. Ensuring that all IT equipment complies with industry standards
  8. Analysing and resolving faults, ranging from a major system crash to a forgotten password
  9. Undertaking routine preventative measures and implementing, maintaining and monitoring network security, particularly if the network connects to the internet
  10. Providing training and technical support for users with varying levels of IT knowledge and competence
  11. Supervising other staff, such as help-desk technicians
  12. Working closely with other departments/organisations and collaborating with other IT staff
  13. Planning and implementing future IT developments and undertaking project work
  14. Managing the website and keeping internal networks running
  15. Monitoring the use of the web by employees.
Posts entitled 'technical support' usually include responsibility for other IT equipment, such as printers and scanners 

Courtesy of : http://www.prospects.ac.uk/network_engineer_job_description.htm
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Wireless Charging

Inductive charging (also known as "wireless charging") uses an electromagnetic field to transfer energy between two objects. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.

Induction chargers typically use an induction coil to create an alternating electromagnetic field from within a charging base station, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electrical current to charge the battery. The two induction coils in proximity combine to form an electrical transformer.Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling.

* Advantages

1. Protected connections - no corrosion when the electronics are all enclosed, away from water or oxygen in the atmosphere.
2. Safer for medical implants - for embedded medical devices, allows recharging/powering through the skin rather than having wires penetrate the skin, which would increase the risk of infection.
3. Durability - Without the need to constantly plug and unplug the device, there is significantly less wear and tear on the socket of the device and the attaching cable.

* Disadvantages

1. Lower efficiency, waste heat - The main disadvantages of inductive charging are its lower efficiency and increased resistive heating in comparison to direct contact. Implementations using lower frequencies or older drive technologies charge more slowly and generate heat within most portable electronics.

2. Slower charging - due to the lower efficiency, devices can take longer to charge when supplied power is equal.

3. More costly - Inductive charging also requires drive electronics and coils in both device and charger, increasing the complexity and cost of manufacturing.

4. Inconvenience - When a mobile device is connected to a cable, it can be freely moved around and operated while charging. In current implementations of inductive charging (such as the Qi standard), the mobile device must be left on a pad, and thus can't be moved around or easily operated while charging.

5. Newer approaches reduce transfer losses through the use of ultra thin coils, higher frequencies, and optimized drive electronics. This results in more efficient and compact chargers and receivers, facilitating their integration into mobile devices or batteries with minimal changes required. These technologies provide charging times comparable to wired approaches, and they are rapidly finding their way into mobile devices.

For example, the Magne Charge vehicle recharger system employs high-frequency induction to deliver high power at an efficiency of 86% (6.6 kW power delivery from a 7.68 kW power draw).

Courtesy of :  http://en.wikipedia.org/wiki/Inductive_charging
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My first DLSR - Canon EOS 650D ;)

Canon meluncurkan kamera DSLR terbaru EOS 650D yang menjadi DSLR entry-level pertama yang dipersenjatai dengan prosesor gambar DIGIC 5. Disandingkan dengan sensor APS-C Hybrid CMOS beresolusi 18 megapixel, 650D mampu menghasilkan gambar berukuran poster yang mendetail dan kaya warna. Kemampuan continuous shooting mengalami peningkatan menjadi 5 fps dengan resolusi penuh.

EOS 650D menjadi kamera EOS pertama yang menggunakan sistem AF ganda. Sistem ini mampu memperkaya detail foto dan menawarkan continuous AF tracking selama proses rekam video berlangsung. Sebagai tambahan, sistem AF dengan 9 titik cross type, serta sistem AF  Hybrid yang menawarkan continuous AF selama rekam video dan pengambilan gambar melalui mode Live View, telah dibenamkan dalam EOS 650D.

Layar LCD yang digunakan dalam EOS 650D mengalami pembaruan yang signifikan dibanding pendahulunya. Walaupun masih menggunakan ukuran 3 inci yang sama dan badan layar yang dapat disesuaikan dengan sudut pandang pengguna, EOS 650D menggunakan layar sentuh yang menawarkan pengalaman fotografi yang lebih menarik.

Melalui mode Live View, pengguna dapat memilih titik AF, melakukan face tracking, dan menyempurnakan pengaturan foto hanya dengan menyentuh layar beresolusi 1.040k-dot tersebut. Layar EOS 650D juga mendukung gestur multi-touch, seperti pinch-zooming dan swipping ketika melihat ulang hasil foto.


Dengan setiap pembaruan yang dilakukan, kemampuan rekam video 1080p, dan kehadiran fitur Creative Filters yang membantu menghasilkan foto-foto dengan efek unik, tampaknya EOS 650D dapat menjadi kamera DSLR entry-level yang tepat. Kamera ini dibanderol dengan harga USD849 (body), USD949 dengan lensa IS 18-55mm, atau USD1199 dengan lensa IS 18-135mm.

Courtesy of:
http://www.jagatreview.com/2012/06/canon-eos-650d-dslr-entry-level-dengan-sistem-af-hybrid-dan-layar-sentuh/

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"Banker to the Poor"

Professor Muhammad Yunus established the Grameen Bank in Bangladesh in 1983, fueled by the belief that credit is a fundamental human right. His objective was to help poor people escape from poverty by providing loans on terms suitable to them and by teaching them a few sound financial principles so they could help themselves.

From Dr. Yunus' personal loan of small amounts of money to destitute basketweavers in Bangladesh in the mid-70s, the Grameen Bank has advanced to the forefront of a burgeoning world movement toward eradicating poverty through microlending. Replicas of the Grameen Bank model operate in more than 100 countries worldwide.

Born in 1940 in the seaport city of Chittagong, Professor Yunus studied at Dhaka University in Bangladesh, then received a Fulbright scholarship to study economics at Vanderbilt University. He received his Ph.D. in economics from Vanderbilt in 1969 and the following year became an assistant professor of economics at Middle Tennessee State University. Returning to Bangladesh, Yunus headed the economics department at Chittagong University.

From 1993 to 1995, Professor Yunus was a member of the International Advisory Group for the Fourth World Conference on Women, a post to which he was appointed by the UN secretary general. He has served on the Global Commission of Women's Health, the Advisory Council for Sustainable Economic Development and the UN Expert Group on Women and Finance.

Professor Yunus is the recipient of numerous international awards for his ideas and endeavors, including the Mohamed Shabdeen Award for Science (1993), Sri Lanka; Humanitarian Award (1993), CARE, USA; World Food Prize (1994), World Food Prize Foundation, USA; lndependence Day Award (1987), Bangladesh's highest award; King Hussein Humanitarian Leadership Award (2000), King Hussien Foundation, Jordan; Volvo Environment Prize (2003), Volvo Environment Prize Foundation, Sweden; Nikkei Asia Prize for Regional Growth (2004), Nihon Keizai Shimbun, Japan; Franklin D. Roosevelt Freedom Award (2006), Roosevelt Institute of The Netherlands; and the Seoul Peace Prize (2006), Seoul Peace Prize Cultural Foundation, Seoul, Korea. He is a member of the board of the United Nations Foundation.

From Les Prix Nobel. The Nobel Prizes 2006, Editor Karl Grandin, [Nobel Foundation], Stockholm, 2007

This autobiography/biography was written at the time of the award and later published in the book series Les Prix Nobel/Nobel Lectures. The information is sometimes updated with an addendum submitted by the Laureate.

Copyright © The Nobel Foundation 2006

http://www.nobelprize.org/nobel_prizes/peace/laureates/2006/yunus-bio.html#
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Green Networking

Energy Efficient Networking Solutions from LGS Innovations


The U.S. Federal Government is looking for ways to reduce its environmental footprint through implementing energy efficient solutions that lower its power consumption, use renewable energy, reduce the use of hazardous materials, and reduce greenhouse gases – all while maintaining or improving its ability to perform its missions while lowering costs. Minimizing Federal Agencies’ dependence on energy is critical: not only is energy usage expensive and a contributing factor to global warming and other environmental concerns, but energy can also be hard to come by – particularly in rural and undeveloped areas that are frequently the focus of agency missions, be it on the home front or the battlefield.
Information and communications technology (ICT) is a significant source of power consumption. For example, faster, more powerful and dense telecommunications hardware generates significant heat and imposes considerable data center cooling requirements. With computer room air conditioning (CRAC) and cooling systems accounting for up to 45 percent of the energy consumed in the data center, the U.S. Federal Government is re-evaluating traditional approaches to data center cooling and seeking to lower costs and increase efficiencies through reduced power consumption, better utilization of space, and improved eco-sustainability.
As part of its effort to find more energy efficient solutions, the U.S. Federal Government is seeking to meet a range of energy efficiency mandates, including:
  • The need to operate as cost-effectively and efficiently as possible
  • The need to maximize energy efficiencies
  • The need to address environmental and green-computing initiatives
  • The need to manage and reduce operational complexity
  • The need to minimize the impact on present data center infrastructure

LGS Innovations: Industry Leader in Energy Efficiency

LGS Innovations delivers cost-effective energy efficient networking solutions that align with a range of agency programs, including cost-effective operations, optimization of energy efficiencies, reduced management complexity, and the need to meet green computing initiatives. Extensive experience and the ability to leverage Bell Labs’ energy efficient networking solutions around thermal design and cooling technologies give LGS Innovations the knowledge and leadership to serve as the strategic partner in transforming U.S. Federal Government networks.
LGS Innovations’ commitment to energy efficiency is a reflection of our parent company’s commitment to reduce the impact of our communications and network solutions on the environment. Alcatel-Lucent has established a comprehensive eco-sustainability program, “Driving an Eco-sustainable Communications Transformation,” with a strategy that focuses on:
  • Direct eco-benefits: We are building smarter, more energy-efficient, eco-sustainable networks, and we are addressing innovation at all layers. We evaluate the environmental impact of our products and networks to help drive innovation in both new and existing networks and equipment.
  • Indirect eco-benefits: We are creating innovative energy efficient solutions and services that enable significant environmental benefits in different business sectors while enriching people’s lives in sustainable ways through such techniques as smart metering, smart buildings, smart transport, and teleworking.
  • Eco-efficient operations: We are embedding environmental responsibility into the way we think and operate; eco-sustainability is integrated throughout our operations.
Alcatel-Lucent signed the “Caring for Climate” initiative in December 2007, and remains committed to setting goals, implementing corporate strategies and using more energy efficient solutions, and reducing our carbon footprint.
The U.S. Federal Government can be confident that LGS Innovations’ energy efficient  networking solutions incorporate energy saving strategies that span across its product lines:
  • At the hardware level: High-efficiency power amplifiers, highly integrated modules (such as the Twin TRX in GSM), or the multi-carrier power amplifier for mixed GSM, W-CDMA and LTE
  • At the software level: Dynamic software adaptation of the power consumption to the traffic carried with dynamic power save in GSM, automatic carrier switch-off in W-CDMA, etc.
  • At the site level: ‘No air conditioning’ utilizing outdoor cabinets, ‘no feeders’ implementing remote radio head technology
  • At the wireless network level: High-coverage radio solutions like the Twin TRX in coverage mode in GSM, beamforming in WiMAX, etc.

Energy Efficient Network Solutions at Work 

The Modular Cooling Solution was deployed in Alcatel-Lucent’s IPTV lab in Plano, Texas , where it has helped address demanding challenges and deliver quantifiable benefits of energy efficient solutions. Specifically, the goals were to:
  • Develop and deploy a cost-effective cooling solution for a 17-server cabinet lab
  • Increase server reliability and density
  • Improve real estate utilization
  • Reduce energy costs
The installation of the infrastructure and cooling system took place over several weeks and was fully operational by June 2009, ahead of schedule. What’s more, the results were immediate and dramatic:
  • Reduction of exhaust (hot) aisle temperature from 40¼C (104¼F) to 22¼C (72¼F)
  • Reduction of internal server temperatures from 32¼C (90¼F) to 24¼C (75¼F)
  • Reduction of noise levels and energy consumption, since servers’ internal fans will run at lower speeds
  • Reduction of building air conditioning load
  • Reduction of overall operating expense
  • Improved server reliability
http://www.lgsinnovations.com/solutions/green-networking
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100GB Networking

The U.S. Federal Government is moving to deliver higher bandwidth technologies that support 100G (gigabit per second) network capacity to ease strain on networks and maintain superior performance – thus avoiding potentially disastrous service bottlenecks.


The jump from 10G or 40G to 100G significantly increases transmission speeds: it enables one network fiber to transport 8.8 TB/sec. This accelerated exchange of data can easily enable a dramatic increase in the use of high-bandwidth applications like video in areas as diverse as battlefield medicine, equipment training, VTC, and video surveillance. It only takes one second to transmit a 90-minute HD video using a 100G interface. With video growing to exceed 91 percent of global consumer traffic by 2014 and Internet video alone predicted to account for 57 percent of all consumer Internet traffic in 2014, the changing landscape of networking demands the best-available solutions for video transmission.

LGS Innovations and its parent company, Alcatel-Lucent, have taken a leadership position in the industry as the only supplier to offer deployable 100G solutions in both the IP and optics domains. In optics, 100G next generation coherent technology is an innovative and economically viable solution for new deployments. Likewise in IP, the power of 100 Gigabit Ethernet (100GE) supports speed, services, and scalability with no compromise.

Key features of Alcatel-Lucent’s 100G solutions include:


  • Higher integration and longer transmission reach
  • Lower network complexity, operational costs, and power consumption
  • Unprecedented compatibility with lower-speed transport infrastructures (such as 10G and 40G)

  • Designed to address the booming bandwidth demands driven by streaming technology, Web applications, file sharing, and high definition video, 100G solutions from LGS Innovations scale existing networks to 100G without performance degradation, and provide an economically viable platform for new optical networking deployments. 


    Leveraging its long heritage with Bell Labs, Alcatel-Lucent has long invested in research and experiments in 100G optical transmission and next generation coherent technology. The benefits of this focus are demonstrated in the success of the company’s offerings. Because Alcatel-Lucent offers both 100G optical transport and 100G Ethernet technologies, LGS Innovations can provide U.S. Federal Government agencies with significantly higher integration and network coverage for the lowest operational costs and power consumption. The optical component leverages PDM-QPSK with coherent detection for best-in-class 100G/s transmission. Alcatel-Lucent has implemented the optics technology on its leading Photonic Service Switch platform, the 1830 PSS.

    The unmatched end-to-end scalability, performance, and low cost-per-bit transport of the Alcatel-Lucent optical solution for achieving 100G communication are due to breakthrough innovations such as optimized modulation formats, which reduce the negative effects of dramatic increases in line rates, and coherent detection, which doubles the transported capacity and increases the spectral efficiency.

    Other technological advances include photonic OAM with Wavelength Tracker, to monitor and trace each wavelength at any point in the network, dispersion compensation, and superior tolerance for optical noise. Transmission distances can be extended without costly regeneration, and the signal can pass through more Reconfigurable Optical Add-Drop Multiplexers (ROADMs) The Alcatel-Lucent optical 100G solutions also boast the best ability to achieve fast wavelength reconfigurations.

    http://www.lgsinnovations.com/solutions/next-generation-high-speed-networking/100gb-networking



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    Apa itu Mikrotik [Router OS]

            
    MikroTik RouterOSadalah sistem operasi dan perangkat lunak yang dapat digunakan untuk menjadikan komputer manjadi router network yang handal, mencakup berbagai fitur yang dibuat untuk ip network dan jaringan wireless, cocok digunakan oleh ISP dan provider hotspot.
          Mikrotik adalah salah satu vendor baik hardware dan software yang menyediakan fasilitas untuk membuat router. Salah satunya adalah Mikrotik Router OS, ini adalah Operating system yang khusus digunakan untuk membuat sebuah router dengan cara menginstallnya ke komputer. Fasilitas atau tools yang disediakan dalam Mikrotik Router Os sangat lengkap untuk membangun sebuah router yang handal dan stabil.
          Mikrotik adalah perusahaan kecil berkantor pusat di Latvia, bersebelahan dengan Rusia, pembentukannya diprakarsai oleh John Trully dan Arnis Riekstins. Tahun1996 John dan Arnis mulai me-routing dunia (visi Mikrotik adalah me-routing seluruh dunia). Mulai dengan sistem Linux dan MS DOS yang dikombinasikan dengan teknologi Wireless LAN (W-LAN) Aeronet berkecepatan 2Mbps di Moldova, tetangga Latvia, baru kemudian melayani lima pelanggannya di Latvia, karena ambisi mereka adalah membuat satu peranti lunak router yang handal dan disebarkan ke seluruh dunia.) wireless dan terbesar di dunia. Prinsip dasar mereka bukan membuat Wireless ISP (WISP), tapi membuat program router yang handal dan dapat dijalankan di seluruh dunia
            Linux yang mereka gunakan pertama kali adalah Kernel 2.2 yang dikembangkan secara bersama-sama dengan bantuan 5 - 15 orang staf R&D Mikrotik yang sekarang menguasai dunia routing di negara-negara berkembang. Selain staf di lingkungan Mikrotik, menurut Arnis, mereka merekrut juga tenaga-tenaga lepas dan pihak ketiga yang dengan intensif mengembangkan Mikrotik secara maraton.
            Mikrotik RouterOS, Adalah versi MikroTik dalam bentuk perangkat lunak yang dapat diinstal pada komputer rumahan (PC) melalui CD. Anda dapat mengunduh file image MikroTik RouterOS dari website resmi MikroTik, www.mikrotik.com. Namun, file image ini merupakan versi trial MikroTik yang hanya dapat dalam waktu 24 jam saja. Untuk dapat menggunakannya secara full time, anda harus membeli lisensi key dengan catatan satu lisensi hanya untuk satu harddisk.  
        
    Fitur-fitur Mikrotik

    Routing - Static routing
    Data Rate Management
    Hotspot
    Point-to-Point tunneling protocols
    Simple tunnels
    Ipsec
    Firewall dan NAT
    Web proxy
    Caching DNS client
    DHCP
    Universal Client
    VRRP
    UPnP
    NTP
    Monitoring/Accounting
    SNMP
    M3P
    MNDP
    Tool
    Wireless
    Bridge
    Virtual LAN
    Synchronous
    Asynchronous
    ISDN
    SDSL

         Mikrotik RouterOS hadir dalam berbagai level.Tiap level memiliki kemampuannya masing-masing, mulai dari level 3, hingga level 6. Secara singkat, level 3 digunakan untuk router berinterface ethernet, level 4 untuk wireless client atau serial interface, level 5 untuk wireless AP, dan level 6 tidak mempunyai limitasi apapun. Untuk aplikasi hotspot, bisa digunakan level 4 (200 pengguna), level 5 (500 pengguna) dan level 6 (tidak terbatas).  

    Sumber :  
        *http://www.mikrotik.co.id/
    http://ittechnosolutindo.com/index.php?option=com_content&view=article&id=103:apa-itu-mikrotik&catid=41:artikel&Itemid=18
    http://rachmad29.blogspot.com/2008/11/apa-itu-mikrotik.html
    http://fabrie.blogspot.com/2011/08/apa-itu-mikrotik.html
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