Jo Apr 7, 2022
What is important in teaching English is to develop students’ practical skills and to train them to be active in thinking in English.
To achieve this goal, you can apply the principle of discovery to teaching English like any other subjects.
In general, the application of this principle means that a teacher does not give a conclusion in advance but leads them to acquire new knowledge like concepts and principles through the self-enquiry based on their activeness and creativity.
When teaching English, a teacher has to make students read textbooks or do exercises by themselves and have a discussion, and has to give an explanation on the problems important and difficult to understand only.
This teaching method consists of 4 stages: environment and assignment, discussion, leading and solution.
Environment and assignment:
In this stage new teaching materials are shown.
On the screen a teacher displays a certain text which is suitable for the level of students and related to their majors so that it can stimulate their enthusiasm for study. Also, the materials should be up-to-date, connected to everyday life and scientific knowledge and contain new vocabulary and grammar. Such materials are worth discussion.
Discussion:
Students have a discussion between themselves or with their teacher over specific questions given by the teacher. When a teacher arranges a discussion on relatively difficult questions, students form their opinions about them. In the discussion students compare and evaluate different opinions to reach an agreement.
Leading:
This stage leads students to achieving goals. By asking leading questions, a teacher leads students’ thinking to the world of analysis and summing up activities. Then they can discover new things by themselves.
Solution:
In the stage a teacher encourages students to find as much information as possible related to the given text, to make compositions using dictionaries and to present them before the class. Then the teacher comments on them, summarizes the main point and evaluates their study activities.
In summary, this teaching method helps students discover anything necessary by themselves as well as simple grammar rules.
In order to raise the teaching effectiveness of this method, you should present assignments and thinking questions commensurate with their levels and abilities, and organize your lectures in an interesting and varied way so that students can be fully involved in them.
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Jo Apr 1, 2022
The teaching method to combine logic with English improves the standard of theory and helps students to have a clear understanding of logic as well as developing their application abilities through the combination of linguistic knowledge such as English vocabulary and grammar with the teaching content.
When we combine logic with linguistic characteristics of English, we can further improve the ability to understand new principles and to make use of English vocabulary.
First, it is important to give students a theoretical explanation of different ways of thinking on the basis of the relationship between the two different languages ― Korean and English.
Associating the explanation of the ways of thinking in Korean with different languages like English is helpful for students to notice the relationship between inferences and statements.
Second, it is important to present English equivalents to Korean sentences or words so that students can get the point easily on their own.
For example, when they are asked to define an inference in English with its structure as an intrinsic attribute and to analyse it logically, they are given chances to think about it logically and to make an active use of English vocabulary.
Third, it’s important to provide the differences in word orders between Korean and English to improve the cognition effect.
For instance, when you explain the differences between a concept and a word, by giving the differences in the word order you can make it clear that if certain expressions with the same words are different in the word order, they are different in their meanings.
As mentioned above, improving the level of theory combining the various linguistic characteristics of English in teaching logic not only helps students have a correct understanding of the gist of the lecture by themselves but also has a great significance to improve their ability of practical use of English.
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Jo Mar 30, 2022
A supporting system for teaching and learning developed by a research team led by Han Pun Hui, a lecturer of logic, is a superior system that makes a favorable environment for the students to have high enthusiasm for study and grasp the heart of the problem actively and positively, so that it could enhance their creative thinking and applicative abilities.
This system presents dynamic and static images along with main thinking questions so students can get the main point of the lessons easily and clearly, and leads their discussion on a scientific basis and at the same time evaluates it real-time quantitatively.
The system, first of all, suggests main thinking questions that require highly vivid imagination as a preparation task.
The thinking questions should include those related to not only the principles of logic but also basic subjects such as mathematics, physics and social subjects so that they can promote the practicality of teaching.
Secondly, it helps students grasp the heart of a problem and enquire into new principles on their own initiatives by leading their discussion and debate on the main question through a bilateral communication network. In the bilateral communication network, it simultaneously receives students’ different answers on the thinking questions, and through the interface, it sets logical relations like deductive, inductive and analogic so that it could raise cognitive effectiveness to the maximum. Through this studying process, students not only can take the initiative in understanding the main point of the lecture but at the same time can possess ability to put logic knowledge into practice.
Furthermore, they can develop a creative thinking ability to find out new principles related to a defining method and its rules voluntarily.
In this way, the system can help students learn a lot more without any limitation of time and quantity and enhance their cognitive effectiveness by presenting thinking questions with dynamic images and receiving and evaluating their answers.
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Jo Mar 25, 2022
When mining penetrates increasingly deeper in open pit mines, the mines take some kind of funnel shape. The deeper the funnel is, the greater the expense for transport gets. In order to accelerate and cheapen transport while maintaining the flexibility offered by truck transport, several types of Trucklift systems have been employed.
These systems are generally similar in structure and operating principle and consist of a slope hoisting plant, platforms, tracks and loading stations. Friction winders or drum winders are used as a hoisting machine and the system can be equipped with either single or double tracks.
When a truck is driven onto and off the platform vertically to the transport direction at the loading station, the platform moves on the rails by the weight of the truck although the winder comes to a halt. Then the truck changing might fail because there may be a difference in the height between the platform and the loading station. So platform arrestors that work when the platform reaches are provided at loading stations, ensuring that the platform is held in the position when the load changes by truck changing.
In addition, when the truck is driven in parallel with the transport direction, the platform also moves on the rails and there appears the varying clearance between the platform and the edge of the loading station. Truck changing may be hindered by this clearance. However, the moving direction of the truck and the platform are the same, so we can avoid the effect of the movement of platforms during truck changing without the help of arrestors by a reasonable design of the structure of loading stations and platforms. For this reason, it is necessary to make a deep study of the moving process of the platform during truck changing.
The moving process of the platform can be simulated with ADAMS and MATLAB/Simulink.
Especially, the simulation of the truck changing process in the Trucklift slope hoisting system where trucks stand parallel to the transport direction on the platform and the analysis of the movement of the platform and the force of rope can provide us with important data for the design of a platform, a loading station and an arrestor.
According to the simulation results, in the Trucklift slope hoisting system with a drum winder, normal truck changing can be realized by making a reasonable design of the platform and the loading station after determining the moving displacement of the platform,
In the Trucklift slope hoisting system with a friction winder, the need to arrange arresters at loading stations must be examined to avoid slipping of ropes in the drum groove due to the movement of the platform during truck changing. If arresters have to be provided at loading stations, the force acting on the platform obtained from the simulation can be used as reference data for the design of arresters.
You can find more information about this in the paper “Simulation for Motion of Platform During Truck Changing in Trucklift Slope Hoisting System in Open Pit Mines Using ADAMS and Matlab/Simulink” by Han Tok Hyong, an institute head at the Faculty of Mining Engineering, presented to the SCI Journal “Arch. Min. Sci.”.
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Jo Mar 24, 2022
Any application including ecological environment monitoring, target tracking, traffic control and agriculture surveillance needs a routing technique for forwarding data sensed by sensor nodes to the base station (BS) or the monitoring centre through several relay nodes.
In topology such as tree or mesh structures used in many applications, sensor nodes are often distributed randomly in areas beyond the reach of people. However, in a one-dimensional queue WSN, nodes are uniformly and densely deployed on a line and this type of network offers many applications such as ecological environment monitoring system along a river, fire monitoring and controlling system along a corridor, smart traffic monitoring system along a road, a tunnel or a bridge, and petroleum pipeline remote monitoring system. In such a one-dimensional queue WSN, the geographical location of each node is fixed, the distance between two neighboring nodes is always uniform, and sensed data can only be forwarded in one direction to the BS. Because of this, the network becomes more unreliable and has high probability that it may be partitioned if some continuous nodes have run out of their energy. Therefore, it should be a key factor of designing a routing protocol in one-dimensional WSNs to ensure energy efficiency and sensed data relay latency by balancing and optimizing energy consumption.
Existing routing protocols in WSNs including a one-dimensional queue WSN attempt to find the path of minimum energy consumption from the source node to the BS to achieve optimal energy consumption because transmitting data consumes much more energy than collecting data.
In one-dimensional queue WSNs, the network topology is linear, so the identification of each node is unique and continuous and the geographical position is certain. From such characteristics, the application of an algorithm that includes a sleep mode in the routing design through timeslot allocation could prolong the network lifetime by ensuring energy efficiency and also satisfy the requirement of sensed data relay latency considering the interference between nodes in some degrees.
This is a distributed energy-efficient opportunistic routing algorithm accompanied by timeslot allocation (DEEOR-TA) using specific network topology of a one-dimensional queue wireless sensor network.
DEEOR-TA algorithm is run in several rounds and each round involves two phases, i.e. clustering-based routing tree construction accompanied by timeslot allocation and data transmission.
Four measurable metrics are defined to evaluate the performance of DEEOR-TA in a one-dimensional queue WSN, i.e. average of residual energy, variation of residual energy, number of dead nodes, and network lifetime.
The simulation results show that the proposed protocol supports better energy efficiency than other existing protocols, and therefore, it can help to prolong the network lifetime.
This paper titled “A distributed energy-efficient opportunistic routing accompanied by timeslot allocation in wireless sensor networks” presented by Ri Man Gun, an institute head at the Faculty of Communication, is carried in the SCI Journal “International Journal of Distributed Sensor Networks”.
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