Overview of Dubnium Facts and Physical Properties

Dubnium is a radioactive synthetic element. Here are interesting facts about this element and a summary of its chemical and physical properties. Interesting Dubnium Facts Dubnium is named for the town in Russia where it was first made, Dubna. It may only be produced in a nuclear facility. Dubnium does not exist naturally on Earth.The element dubnium was the subject of a naming controversy. The Russian discovery team (1969) proposed the name  nielsbohrium  (Ns) in honor of the Danish nuclear physicist Niels Bohr. In 1970, an American team made the element by bombarding californium-239 with nitrogen-15 atoms. They proposed the name hahnium (Ha), to honor the Nobel Prize-winning chemist Otto Hahn. The IUPAC determined the two labs should share credit for the discovery because their results supported each others validity, using different methods to create the element. The IUPAC assigned the name  unnilpentium for element 105 until a naming decision could be reached. It wasnt until 1997 it was decided the element should be named Dubnium (Db) for the Dubna research facility -- the location where the element was initially synthesized.Dubnium is a super -heavy or transactinide element. If a sufficient amount were ever produced, its chemical properties are expected to be similar to that of the transition metals. It would be most similar to the element tantalum.Dubnium was first made by bombarding americium-243 with neon-22 atoms.All isotopes of dubnium are radioactive. The most stable one has a half-life of  28 hours.Only a few atoms of dubnium have ever been produced. At present, little is known about its properties and it has no practical uses. Dubnium or Db Chemical and Physical Properties Element Name: Dubnium Atomic Number: 105 Symbol: Db Atomic Weight: (262) Discovery: A. Ghiorso, et al, L Berkeley Lab, USA - G.N. Flerov, Dubna Lab, Russia 1967 Discovery Date: 1967 (USSR); 1970 (United States) Electron Configuration: [Rn] 5f14 6d3 7s2 Element Classification: Transition Metal Crystal Structure: body-centered cubic Name Origin: Joint Institute for Nuclear Research at Dubna Appearance: Radioactive, synthetic metal References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Langes Handbook of Chemistry (1952)

Differentiating Between Market Structures Essay - 1077 Words

Differentiating between Market Structures The structure of a market is defined by the number of firms in the market, the existence or otherwise of barriers to entry of new firms, and the interdependence among firms in determining pricing and output to maximize profits. The author of this paper will cover: the advantages and limitation of supply and demand identified in the simulation, the effectiveness of the organization in which the author knows, and how the organizations in each market structure maximizes profits. The simulation looks at all four types of market structure within the East-West Transportation Company. The four divisions operate within each of the four market structures. The divisions are Consumer Goods, Coal, Chemical†¦show more content†¦The Forest Product Division operates in the monopolistic competition market structure. A firm operating in monopolistic competition faces a downward sloping demand curve (University of Phoenix, 2008). The effectiveness of Staples Staples operates in the monopolistic competition. Staples carries many different brands and items within the store. Staples, unlike many monopolistic competition companies are concerned about what the major local competition is doing with their prices. Staples hires an outside company to check the different prices on items that they all carry alike, and then they decide to adjust their price accordingly to the research. Since Staples operates in the monopolistic competition, the demand curve faces in a downward slope. The downward – sloping demand curve means that in making decisions about output, the monopolistic competitor will use a marginal revenue curve that is below price. At its profit-maximizing output, marginal cost will be less than price (The McGraw-Hill, 2004). In the monopolistic competition market structure the competition implies zero economic profit in the long run. If Staples shows a profit then the competition in the market will lower the price to increase th eir profits and stop Staples. This would continue until the profits disappeared and the new demand curve is tangent to the new average total cost curve. Market Structure Maximize Profits The goal of a firm is to maximize profits, to get as much forShow MoreRelatedDifferentiating Between Market Structures1766 Words   |  8 PagesDifferentiating between Market Structures Jessika Canales Dà ­az ECO /365 08/28/2010 Instructor: SR. Carlos Mà ©ndez David Differentiating between Market Structures In this simulation, the learner studies the cost and revenue curves in different market structures perfect competition, monopoly, monopolistic competition, or oligopoly faced by a freight transportation company, and makes decisions to maximize profits or to minimize losses. 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Based on the evaluation of Kudler Fine Foods an applicable market structure will be determined and the structures effectsRead MoreDifferentiating Between Market Structures1924 Words   |  8 PagesDifferentiating Between Market Structures Alana Campbell, Dale Fortune, Katrina Beyah, Leonard Cooper University of Phoenix ECO/212 Principles of Economics Donnetta McAdoo December 5, 2011 Differentiating Between Market Structures To understand the economy of today one must understand the different market structures that make up the economy. There are four market structures that define the economic structure within the world’s economy; perfect competition, monopoly, monopolistic competitionRead MoreDifferentiating Between Market Structures1910 Words   |  8 PagesDifferentiating Between Market Structures Don Peterson ECO/365 February 2, 2015 Elena Zee Differentiating Between Market Structures A market structure in economics describes the state of a market with respect to its competition. 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The La Jolla store continues to grow while the Del Mar store has been having some difficulties. The store in Encinitas has just opened, but sales seem brisk.† (Apollo, 2011, Strategic Plan, p. 3) The owner works 7 days a week and performs many jobs from purchasing to stocking shelves. Kudler Fine Foods sees

Learner-Center Educational Plan Free Essays

string(80) " the opportunity to ask any questions and familiarize themselves with the work\." With abundance of information regarding teaching and learning, it might reasonably be expected that education planning would be a quick and easy process. Teachers still have a vital role to play within planning; the guidance and frameworks provides information on what to teach, the teacher will decide how best to interpret this information for the particular children within their class. Proctor et al (1995, p. We will write a custom essay sample on Learner-Center Educational Plan or any similar topic only for you Order Now 39) discusses the requirement for planning, and opens with the idea that no planning can take place without a clear idea, on the part of the teacher, of what the children in the class are going to learn. The planning process requires the identification of the learning objectives in detail; in reality, meeting the criteria of the curriculum and even the more detailed key objectives in the teaching strategy will require a series of lessons and usually a return to the subject at a later date. Planning over different time frames allows teachers to meet the desired outcomes and provide a coherent progression. Long term plans will detail the expectations within a curriculum area over an academic year; these plans will identify themes to be used and the subject areas to be covered they will be expressed in terms of the key concepts that children will need to understand and the knowledge and skills that they should be acquiring. Medium term planning will usually be for a unit of work – generally one item from the program of study – and cover a term or  ½ term. The medium term planning phase is when teachers are required to link the long-term plans to the curriculum key objectives. The medium term plans will outline a series of activities and the approach that is to be taken; these plans are the first level at which the teaching/learning approach is considered and the methods and criterion for assessment are decided. (Platz 1994) There is need to consider the different learning styles that children prefer and to include (as far as is practical) these different styles within each teaching episode. Education planning, is a complex area, not all teaching methods are appropriate to the subject matter; we as teachers need to remember that an eclectic approach is necessary if we are to provide an adequate learning experience for all of the pupils within our classrooms. Additionally, new paradigm of learner-centered education emerged recently. It implies issues of what and how the student is learning, the conditions under which the student is learning, how current learning positions the student for future learning, and whether the student is retaining and applying the learning. (Weimer, 2002 XVI).   In this paper we will try to cover up a cognitive aspect of learner-center education planning. Cognitive aspect of learner-centered education involves some following factors. These are the nature and goals of learning process, the construction of knowledge and higher-order thinking. In order to identify children’s individual learning needs the teacher should observe the children and their work. Factual information can be obtained from previous teachers, schools etc. The Standard Assessment Tasks (SATs) provide essential information about the level of attainment a child has reached and may possibly show levels of progression over time. According to Proctor et al (1995 p.129) assessment provides an accurate picture of an individual child’s achievements. It measures a child’s achievements from that child’s own baseline and as it is non-comparative to other children it shows what a child is able to achieve regardless of what other’s can do. Individual Educational Plans (IEPs) show evidence of any special needs, which may be physical such as poor sight and hearing and any learning difficulties. It will also identify children who have behavioral problems or particularly able and gifted children. IEPs will also show any strategies and teaching approaches used to meet these children’s needs. It can also highlight any particular resources that facilitate the children’s learning. A previous teacher can provide valuable information on how these strategies and resources were employed and the success or failure of them. It is important to keep in mind when discussing children with other teachers that their views and opinions are unlikely to be impartial. Conversations with parents/carers allow them to raise any issues they have about their interpretations of their children’s needs and progress in learning. It can also be useful to look at children’s ages to gain a better understanding of the level they are working at. Once this preliminary information has been collected the teacher can plan diagnostic work, which will further identify children’s abilities and needs. Teachers should plan broad topic work at a variety of levels where children have a reasonable opportunity of success and which provides some challenges. The teacher’s prior knowledge of the children should enable him/her to pitch the work at the correct levels. If not, the assessment of the children’s difficulties or ease will provide clues as to how to alter it. From this point onwards the teacher should have a fairly coherent idea of the needs of the class as a whole and the individual children within it. (Hamilton 1999) When planning to meet children’s individual needs, a teacher is planning for inclusive education, which provides all children with an equal opportunity to reach their potential.   While planning, teachers must set up a learning activity, which effectively achieves the learning outcomes for each individual child. Teachers must structure learning within their classrooms in order to move each child forward, this can include differentiating appropriately, using appropriate resources and implementing various teaching and learning strategies inclusive of all children. Teaching Strategies Education planning will use a variety of strategies described by Minton (1997, p.117). It is appropriate to use ‘lecture’ to begin the session to explain what is to be covered, to find out how the students have found the work in the previous session so there will be some ‘questions and answers’. There will be a ‘group discussion’ as we go through the assignment and this will give the students the opportunity to ask any questions and familiarize themselves with the work. You read "Learner-Center Educational Plan" in category "Essay examples" A ‘question and answer’ session will follow and then depending on the outcome, there be the opportunity for ‘demonstrations’. These strategies are outlined below.  §   Question and answer to review work from last lesson  §   Lecture to explain unit assessment  §   Group discussion while criteria for assessment are discussed  §   More question and answers as appropriate  §   Demonstration of previous practical work if necessary Using Q and A to start the lesson as this gives an immediate feedback of progress. The disadvantage of this is that the ‘quiet’ students may be reluctant to ask questions, There is need to be aware of this, and perhaps ask those students questions that they can answer to build up their confidence. A lecture strategy is then used to explain the unit assignment, as this is an effective method of broadcasting the information. Then a group discussion will involve teacher and students discussing criteria, this allows everyone to ask questions and give opinions but it may allow ‘loud’ students to dominate the group. Certain time to demonstrate practical work to the students on the computer allows the student to see what the final product should be of any particular exercise and gives them confidence in their own work. Learning Resources For IT classes, for example, a variety of resources are used in the high school. The most common ones used in the IT department are computer-based resources, OHT’s and computer generated slides, and printed materials. The most common types of media resource are the PC/projector combination and printed materials, to accompany whiteboard work. In the IT department it is critical that students have individual access to PCs with relevant software installed on them, and also access to a printer to enable them to obtain hard copies of work produced. There is need for a room to seat all students, we do not need PCs for each student in this case, we need them all to see a whiteboard so we can explain the topic we will supply unit assignments in hard copy to every student, including the marking criteria and the moderator’s comments. It is becoming common practice to write all forms of work on the PC, and we would expect them to word process their work whenever the facility is available. There is need to evaluate the group of students at the beginning of a course to determine if any had special requirements, for example disabled access or if any had hearing or visual impairments. It is necessary to develop intranet to include study aids for the students. For example, to put previous lecture notes and practical exercise handouts on the intranet to enable students to go over past work and also allow absent students the opportunity to catch up. Arrangement of the desks in the classroom is a common horseshoe of computer workstations with a small number of tables in the center of the room. The central tables can be moved freely although this is a suitable position for the classroom discussion. The computer workstations will be used towards the end of the lesson. The white board is at the door end of the room, it is a new smart board, and although is smaller, it can be seen from all positions in the room, if the students move their chairs round. This will be used for demonstrations of PC work and is available for the question and answer section. The acoustics are adequate for a teaching environment. The room is always light and warm enough, and windows can be opened to provide additional ventilation. Goals of learning process On reflection, education planning goals are following: Timing · Allow enough time for each phase. Be aware of how long it takes to complete tasks and allow some leeway in each lesson for dealing with any class management issue. Be wary of being overambitious in what can be achieved in a lesson. Allow enough time for discussion and be aware of allowing too much time for starter and plenary activities. Content · Teacher should not try to cram too much in – don’t fall into the trap of thinking ‘one topic per lesson’ and be prepared to spend more than one lesson on a topic When to collect in/hand out homework · Have a clear idea of when you are going to do this and how. Keep it consistent so the pupils know when to make a note in their contact diaries, and when to hand their homework into me, and allow time for this to be done. Differentiation.   Although there has been minimal need for differentiation in teaching particular class, teacher should be aware that other classes might require more differentiation and he should always ensure that lessons are tailored to the class he teaching. Pupil-led activities.   Make sure to include enough pupil-led activities. Remember that these types of activities not only engage learning but are also very useful in settling a lively class. Strengths Planning lessons around the five different phases of a lesson, using starter and plenary activities. This enables to focus on the different stages of a lesson and therefore how best to achieve the learning objectives as well as concentrating on what either myself as teacher, or the class or individuals should be engaged in at any point during the lesson. However, flexibility is also a key factor in delivering effective lessons and it is able to adapt the lesson plan (for example by omitting certain overheads or allowing more time for discussion of a topic) to accommodate the learning. Being creative. This a useful skill in planning and meant that it is appropriate to present what is for most pupils a familiar topic in a new and interesting way, therefore engaging more higher order thinking and facilitating learning (and minimizing disruptive behavior) at the same time. Being able to plan around what resources are available. This to a certain extent is also a creative skill although it must be taken into account when planning a series of lessons. Linking lessons with each other and with the pupils experiences. Using everyday examples, images that the pupils can relate to, and referring back to the concept map of the whole picture at every lesson enabled the pupils to put their learning (and the objectives for each lesson) in context. If the pupils can relate to what you are teaching them, you are more likely to succeed in your learning objectives. Weaknesses Overestimating what can be achieved in a lesson. Certainly to begin with, underestimated how long it would take to complete a worksheet or copy something from the board. In addition, it had not taken into account during first lesson plan, the time that would be spent on dealing with minor off-task behavior which can lead to you running five minutes late by the end of the lesson and therefore running out of time for the clearing and exit phases, which for example can mean you run out of time to explain the homework task properly. Spending too much time on one phase. The pupils enjoyed this so much that they would ‘plead’ for another round and on more than one occasion complied, meaning that although the pupils had a ‘great’ time, teacher run out of time to handle the clearing and exit phases as well as he should and the lessons ended a bit ‘rushed’. This is as a ‘new’ teacher who was anxious to ensure that the pupils viewed my lessons as a ‘positive’ experience References: Hamilton, P. J. (Fall 1999). Perceptual learning lifelong Montessori. Montessori Life, 11(4), 41-42. Minton, D. (1997) Teaching skills in further and adult education 2nd edition, Macmillan Proctor, A. Entwistle, M. McKenzie-Murdoch, S. (2001) â€Å"Learning to Teach in the Primary Classroom† London : Routledge Platz, Donald L., (March, 1994)   Student directed planning: fostering student ownership in learning. Education, 3 Weimer, Maryellen. (2002) Learner-centered Teaching: Five Key Changes to Practice. Jossey-Bass How to cite Learner-Center Educational Plan, Essay examples

Data Base Management System Encryption Technique

Question: Discuss about a Report of Data Base Management System for Encryption Technique? Answer: Data base management system Database management system is the process to manage the data is a system. Database is the collection of related data and that can be manage is a procedural way. Data are represent in a recordable fact. Database manage system is a way to store the data is a process that becomes very easier to retrieve, manipulate and information. Relational database management system Relational Database management system is the process to manage the data is a system. Database is the collection of related data and that can be manage is a procedural way. Data are represent in a recordable fact. Database manage system is a way to store the data is a process that becomes very easier to retrieve, manipulate and information. Database Management System is the appropriate tool for this project. According to many theories database manage system can manipulate with huge data which are keep secured by it s own encryption techniques. A database have many option like integrity, integrity stand for a unique data in a database. That means one recorded will store uniquely in the database. The data base manage system have an option to fiend to appropriate filed without wasting time. This field will find by ms-access or SQl quarry. Database Management System was developed as a Relational Database. Relational database management system implements many new futures like a forging key. A forging key is a primary key of a table which is also related to another relation. Database Query is and discuss briefly the five queries that were developed for this project. insert delete update max count Database Form is and discuss briefly the two forms that were developed for this project. its helps the database to grater information in a system that help to view data easily. What a Database Report is and discuss briefly the report that was developed for this project. According to many theories database manage system can manipulate with huge data which are keep secured by it s own encryption techniques. A database have many option like integrity, integrity stand for a unique data in a database. That means one recorded will store uniquely in the database. The data base manage system have an option to fiend to appropriate filed without wasting time. This field will find by ms-access or SQl quarry.