• East Asian mathematical journal
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• 제30권4호
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• pp.405-438
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• 2014

This study analyzed and discussed instruction methods of polyhedrons in elementary mathematics textbook by using the didactic transposition theory. By further segmenting instruction methods, we analyzed the period and order of teaching of polyhedrons, its definitions and presentation methods, and how instruction methods has changed so far. In elementary mathematics textbooks from the 1st to the 2007 revised curriculum, we choose the part where polyhedrons are introduced as the search-target, and analyzed instruction methods in these textbooks by using phenomenological description. The instruction period and order of polyhedrons were systemized when the system of Euclid geometry was introduced, considering the psychological condition of students, and the instruction period and order had been refined according to the curriculum. And methods of definition took into consideration both the academic systems and psychological situations. Also, the subject of learning has changed from textbook and teachers to students. Polyhedrons were connected to real life and students could build up their knowledge by themselves. Constructions were aimed at the understanding of meaning of contents, rather than at itself. Through these analyses, we have some suggestions on the teaching of polyhedrons in the elementary mathematics.

• Educational Technology International
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• 제6권2호
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• pp.23-41
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• 2005

One of the main factors that determine the quality of instruction is the teaching ability of the instructor administering the class. To evaluate teaching ability, methods such as peer review, student feedback, and teaching portfolio can be used. Among these, because feedback from the students is directly associated with how well the students feel they have learned, it is essential to improving instruction and teaching ability. The principal aim of instruction evaluation lies in the evaluation of instructor's qualification and the improvement of instruction quality by enhancing professionalism. However, the mandatory instruction evaluations currently being carried out at the term's end in universities today have limitations in improving instruction in terms of its evaluation items and times. To improve the quality of instruction and raise teaching abilities, instruction evaluations should not stop at simply being carried out but also be utilized as useful data for students and teachers. In other words, they need to be used to develop teaching and improve instruction for teachers, and consequently, should also exert a positive influence on students' scholastic achievements and learning ability. The most important thing in evaluation is the acquisition of accurate information and how to utilize it to improve instruction. The online instruction diagnosis item pool is a more realistic feedback device developed to improve instruction quality. The instruction diagnosis item pool is a cafeteria-like collection of hundreds of feedback questions provided to enable instructors to diagnose their instruction through self-diagnosis or students' feedback, and the instructors can directly select the questions that are appropriate to the special characteristics of their instruction voluntarily make use of them whenever they are needed. The current study, in order to find out if the online instruction diagnosis item pool is truly useful in reforming and improving instruction, conducted pre and post tests using 256 undergraduate students from Y university as subjects, and studied the effects of student feedback on instructions. Results showed that the implementation of instruction diagnosis improved students' responsibility regarding their classes, and students had positive opinions regarding the usefulness of online instruction diagnosis item pool in instruction evaluation. Also, after instruction diagnosis, analyzing the results through consultations with education development specialists, and then establishing and carrying out instruction reforms were shown to be more effective. In order to utilize the instruction diagnostic system more effectively, from planning the execution of instruction diagnosis to analyzing the results, consulting, and deciding how those results could be utilized to instruction, a systematic strategy is needed. In addition, professors and students need to develop a more active sense of ownership in order to elevate the level of their instruction.

• 전자공학회논문지C
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• 제34C권9호
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• pp.43-52
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• 1997

Processors using the superscalar rchitecture can achieve high performance by executing multipel instructions in a clock cycle. It is made possible by having multiple functional units and issuing multiple instructions to functional units simultaneously. But instructions can be dependent on one another and these dependencies prevent some instructions form being issued at the same cycle. In this paper, we designed an issue unit of a superscalar RISC microprocessor that can issue four instructions per cycle. The issue unit receives instructions form a prefetch unit, and issues them in order at a rate of as high as four instructions in one cycle for maximum utilization of functional units. By using an instruction buffer, the unit decouples instruction fetch and issue to improve instruction ussue rate. The issue unit is composed of an instruction buffer and an instruction decoder. The instruction buffer aligns and stores instructions from the prefetch unit, and sends the earliest four available isstructions to the instruction decoder. The instruction decoder decodes instructions, and issues them if they are free form data dependencies and necessary functional units and rgister file prots are available. The issue unit is described with behavioral level HDL (lhardware description language). The result of simulation using C programs shows that instruction issue rate is improved as the instruction buffer size increases, and 12-entry instruction buffer is found to be optimum considering performance and hardware cost of the instruction buffer.

• 한국산업융합학회 논문집
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• 제20권1호
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• pp.1-7
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• 2017

Most conventional processors execute program instructions in a sequential manner. On the other hand, VLIW processor can execute multiple instructions at the same time. It exploits instruction level parallelism to improve system performance. To that end, program code should be rearranged to VLIW instruction format by a compiler. The compiler determine an optimal execution order of instructions of a program code. This instruction ordering is also called instruction scheduling. The scheduling is an algorithm that decides the execution order for instruction codes in loop parts of a program so that the instruction level parallelism can be maximized. In this research, we apply an existing scheduling algorithm to a VLIW FCC and describe analysis results to further improve its performance. And, we present a solution to solve some limitation of the existing scheduling technique. By using our solution, FCC's performance can be improved upto 32% compared to the existing scheduling only setting.

• 말소리와 음성과학
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• 제2권2호
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• pp.51-60
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• 2010

This study is to examine how Korean speakers realize English stress on the homographic words. Experiments were performed by Korean speakers three times, before stress instruction, immediately after instruction, and six weeks after instruction. First, duration, fundamental frequency, and intensity of the vowel in a stressed syllable of three homographic words produced by Korean speakers were compared with those of native speakers of English. The result shows that when the words were used as nouns, before instruction Korean speakers had shorter duration and lower fundamental frequency in the stressed vowel than the native speakers, which indicates that Korean speakers did not assign the primary stress on the first syllable of the nouns. After instruction, the values of duration and fundamental frequency were increased and the differences between two groups were decreased. Next, the values of these stress features measured three times were analyzed in order to find out how they changed through instruction. The analysis shows that after instruction the values of three features were increased compared to the ones before instruction, and that the biggest change was in duration of the vowel and the next was fundamental frequency. Six weeks after instruction, the values of duration and intensity were decreased than those immediately after instruction. This means that instruction is helpful for Korean speakers to assign the stress for the English homographic words, and that instruction and practice are needed repeatedly.

• 한국컴퓨터정보학회논문지
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• 제21권9호
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• pp.1-9
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• 2016

Recent embedded processors employ set-associative L1 instruction cache to improve the performance. The energy consumption in the set-associative L1 instruction cache accounts for considerable portion in the embedded processor. When an instruction is required from the processor, all ways in the set-associative instruction cache are accessed in parallel. In this paper, we propose the technique to reduce the energy consumption in the set-associative L1 instruction cache effectively by accessing only one way. Gshare branch predictor is employed to predict the instruction flow and determine the way to fetch the instruction. When the branch prediction is untaken, next instruction in a sequential order can be fetched from the instruction cache by accessing only one way. According to our simulations with SPEC2006 benchmarks, the proposed technique requires negligible hardware overhead and shows 20% energy reduction on average in 4-way L1 instruction cache.

• 영어어문교육
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• 제18권2호
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• pp.171-187
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• 2012

This study aims to investigate the effects of learning strategy-based early reading instruction for English underachieving students. For this purpose of the study, sixteen learning strategies were driven from the review of previous related literature and the result of the survey conducted to the students and the teachers. Strategy integrated early reading instruction was implemented to nine students for thirteen weeks. The word recognition test was conducted before and after the instruction to examine whether the instruction had effects on the increase of their early reading skill. In addition, in order to investigate certain change in students' affective aspects after the instruction. The research conducted survey to the students. A teacher's field note and students' class journal were also analyzed to verify the results from the quantitative test. The results indicated that the instruction led to the increase of students' early reading skills. It was also found that the instruction motivated the underachieving students to devise a strategy for their learning process.

• 한국수학교육학회지시리즈A:수학교육
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• 제59권3호
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• pp.237-254
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• 2020

본 논문은 수업을 위한 수학적 지식과 수업의 질에 대한 상관관계를 보고하는 연구이다. 선다형 평가 문항 유형의 설문지를 이용하여 교사들의 수업을 위한 수학적 지식을 수집하였고, 촬영된 그 교사들의 수업을 수학 수업 분석 도구를 이용하여 수업의 질을 평가하였다. 두 점수들의 상관관계를 통계적으로 분석하여, 유의미한 양적 상관관계가 있음을 보고한다. 또한, 수집된 수업 영상과 교사들의 인터뷰 자료의 분석을 통해 수업을 위한 수학적 지식이 중재하지 못하는 수업의 질과 관련된 요소를 찾아내었다. 이러한 결과를 기반으로 수학 교사 교육에 대해 논의한다.

• 대한지리학회지
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• 제40권1호
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• pp.109-125
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• 2005

본 연구의 목적은 지리과에서의 고급사고력 신장을 위한 교수-학습 모형 개발을 개발하고 현장에 적용해 보는 것이다. 논문의 목적을 달성하기 위해 고급사고력 신장과 관련된 문헌을 검토하고 고급사고력신장에 있어서 역할놀이의 교육적 의의와 활용에 대해 논의하였다. 고급사고력은 새로운 상황에 직면했을 때 독창적으로 문제를 해결하려고 하는 정신작용으로, 본고에서는 고급사고력을 문제해결과 의사결정능력, 창의적 사고, 비판적 사고, 메타인지로 구분하였다. 다양한 교수-학습 모형의 적용을 통하여 학생들은 창의적 사고, 비판적 사고, 문제해결과 의사결정능력, 메타인지 등 고급사고력을 신장시킬 수 있다. 본고에서는 고급사고력 신장을 위한 교수-학습 모형 중 하나로 역할놀이를 10학년 사회교과서 중 환경관련 단원 (IV. 환경문제와 지역문제)을 사례로 개발하였다. 개발한 역할놀이 교수-학습 모형을 서울시내 고등학교 1학년 학생을 대상으로 현장에 적용하였다. 역할놀이에 참여한 학생들은 주어진 지리적 문제 상황에 맞는 역할극을 실연해 보고 관찰한 것을 바탕으로 서로의 예측 결과를 공유하고 토론하고 일반화함으로써 문제해결과 의사결정, 창의적 사고, 비판적 사고, 메타인지 등 고급사고력을 신장시킬 수 있고 가치관, 태도 등 기능적$\cdot$정의적 영역도 향상시킬 수 있다.

• 한국수학사학회지
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• 제18권4호
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• pp.85-100
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• 2005

최근 저자들은 수학교육에서 수학사의 적극적인 활용과 수학지도의 순서를 결정하는 문제에 관해 연구하였다 수학지도의 순서로는 역사적 순서, 이론적 체계, 강의적 체계 순서의 세 유형이 제안되었다. 강의적 체계 순서는 역사적 순서와 이론적 체계의 결합이며 그 결합은 본질적으로 교사 개개인의 교육적 가치관에 따른다. 본 논문에서는 구체적으로 각의 개념에 관해 수학지도의 순서에 대한 결정문제를 다룬다. 실제 각의 개념은 도형의 개념에 관계하여 정의되기 때문에 도형의 개념에 관한 수학지도 순서의 결정 문제도 함께 다루어진다. 먼저, 수학사를 통해 도형의 개념의 역사적 순서를 조사한다. 다음에 도형에 대한 이론적 체계를 수립한다. 이러한 기초적인 자료로부터 문제 해결의 관점에서 도형의 개념의 강의적 체계 순서를 제시한다. 끝으로 제시된 도형의 강의적 체계 순서에 따라 각의 개념에 대한 강의적 체계 순서를 노의한다. 또한 가우스$\cdot$보네 정리와 관련하여 각의 대역적 성질에 관해서 고찰한다.