경사 발사 유도무기체계에서 함상 저장 전달정렬 가능성 연구

이인섭,유해성,김천중,오주현,윤석재,박찬식 제어·로봇·시스템학회 2022 제어·로봇·시스템학회 논문지 Vol.28 No.12

Shipboard transfer alignment is a procedure for determining the initial navigation information of the ship-mounted guided weapon system’s SINS by receiving the surface ship INS information. In order to improve the navigation accuracy of the ship-launched guided missile system, it is necessary to enhance the precision and accuracy of the shipboard transfer alignment. Generally, the shipboard transfer alignment uses both velocity matching and attitude matching to increase observability. Estimating the misalignment error between SINS and MINS using an extended Kalman filter is necessary to obtain the initial attitude of SINS in shipboard transfer alignment to which attitude matching is applied. Because it takes several minutes for the estimated misalignment error to converge, it is essential to reduce the alignment time, especially in the case of weapon systems. This paper presents the possibility of utilizing the shipboard stored transfer alignment for navigation-grade INS mounted on the inclined launching system. There have been no reports of previous studies on the shipboard stored transfer alignment. In a similar research case, a rapid initial alignment method using the pre-performed alignment results was proposed to reduce the alignment time of tactical-grade INS, which was mounted on the launch platform with MINS. To verify the possibility of the shipboard stored transfer alignment, the existing shipboard transfer alignment was repeatedly performed using an inclined guided missile system deployed in the military. The results show that the repeatability and accuracy of the misalignment error satisfy the initial attitude error requirement. Therefore, based on the test results, it is verified that the shipboard stored transfer alignment for the inclined launching guided missile equipped with a navigation-grade INS is possible. .

중등교사들의 교육과정-수업-평가-기록 일체화 실행수준 점검 및 자기평가 분석

이재창(Lee Jae Chang),최정원(Choi Jeong Won) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.10

목적 본 연구는 중학교와 고등학교 교사를 대상으로 교육과정-수업-평가-기록 일체화 실행수준을 파악하고 일체화 실행수준에 대해 스스로 어떠한 평가를 하고 있는지 확인하였다. 또한, 교사들의 교육경력, 학교급, 일체화 관련 연수 이수 경험, 일체화 관련 교사학습공동체 활동 경험과 교육과정-수업-평가-기록 일체화 관련 실행 사이의 상관관계를 분석하였다. 더불어 이러한 배경변인들이 일체화 실행에 미치는 직접적인 효과를 살펴보았다.방법 설문조사는 관심기반실행모형에서 제시하는 실행수준 척도를 수정하여 사용함으로써 실행수준을 확인하였고, 선행연구에서 제시한 교육과정-수업-평가-기록 일체화의 절차를 토대로 본 연구자가 개발한 문항을 이용하여 각 요소별 실행수준에 대한 자기평가를 확인하였다. 설문진행은 2019년 8월부터 2020년 1월까지 이루어졌으며 대상 학교는 ○지역 중학교 5개교, 고등학교 5개교였다. 중학교 교사 110명, 고등학교 교사 132명으로 총 242명의 응답에 대해 분석하였다. 분석방법은 기술통계, 교차분석, 상관분석, 순서형 로지스틱 회귀분석을 사용하였다.결과 주요 연구결과로는 첫째, 학교급에 상관없이 교사들의 실행수준이 전반적으로 낮았다. 그리고 고급수준인 갱신단계(6수준)에 이르는 비율이 극히 적은 것으로 파악되었다. 둘째, 중학교 교사들은 학습자중심 수업 수행여부와 일체화에서의 모든 요소들을 연계하여 운영한다는 응답비율에서도 고등학교 교사보다 더 높은 비율을 보였다. 셋째, 일체화 관련 교사학습공동체 활동 경험이 있는 교사들은 일체화 요소들을 더 긴밀하게 연계하는 것으로 나타났다. 넷째, 교육경력, 일체화 관련 연수, 관련 교사학습공동체 활동은 모두 실행수준 0수준에 통계적으로 유의미한 부적 효과를 보이고 3, 4, 5수준에는 통계적으로 유의미한 정적효과를 보이는 것으로 밝혀졌다.결론 제언사항은 첫째, 중등교사들의 교육과정-수업-평가-기록 일체화 관련 실행역량을 강화하기 위하여 교사 연수나 교사학습공동체와 같은 전문성 신장을 위한 기회를 확대하여 제공할 것, 둘째, 연수와 교사학습공동체 활동에 있어서 목표, 내용, 주제, 수준을 다양화하고 각각을 전문화⋅차별화하여 구성할 것, 셋째, 교육과정-수업-평가-기록 일체화에서 수업이 나머지 요소들에 미치는 영향 및 수업방식과 일체화 요소 간 연계성에 대한 심도 있는 후속 연구를 실시할 것을 제시하였다. Objectives This study identified the level of use on the alignment with curriculum - instruction - evaluation - record and self-evaluation with teachers in middle and high schools. In addition, the study analyzed correlation between teacher s educational career, level of school, experience in alignment-related training and experience in alignment-related teacher learning community activities and alignment with curriculum - instruction - evaluation - record. It also reviewed the direct effect of these background variables on adoption with alignment. Methods The survey identified overall adoption level by modifying and using scale of adoption level presented by concerns-based adoption model, and teacher’s self-evaluation was identified by using questions developed this researcher based on the procedures of alignment with curriculum - instruction - evaluation - record presented by pilot study. The survey was conducted from August 2019 to January 2020 and the subject schools included 5 middle schools and 5 high schools in the area of ○. A total of 242 responses were analyzed including 110 middle school teachers and 132 high school teachers. Descriptive statistics, crossover analysis, correlation analysis and ordinal logistic regression were used for analysis. Results The results of the study are as follows. First, regardless of level of school, the teacher’s level of adoption of the alignment with curriculum-instruction-evaluation-record are overall low. And there are very few teacher who reach the renewal level(level six). Second, middle school teather’s response rate are higher than high school teather’s not only student centered instruction factor but also connecting all the element of the alignment with curriculum-instruction-evaluation-record. Third, the teacher who has participated in alignment-related teacher learning community activities connects all the element of the alignment with curriculum-instruction-evaluation- record more. Fourth, teacher s educational career, experience in alignment-related training and experience in alignment-related teacher learning community activities have negative effectiveness in level 0 and positive effectiveness in level 3, 4, 5. Conclusions The suggestions were given as follows. First, opportunities to develop professionalism such as teacher s training and teacher s learning community must be expanded and provided to strengthen adoption capacity related to alignment with curriculum - instruction - evaluation - record of secondary school teachers. Second, goals, contents, topics and levels must be diversified in training and activities of teacher s learning community and each of them must be specialized and differentiated. Third, in-depth follow-up study on the effect of instruction on remaining factors in the alignment with curriculum - instruction - evaluation - record and on connectivity between factors of alignment must be conducted.

Coarse Alignment of Lunar Exploration Rover Using Accelerometer and Sun Sensor

Jaehyuck Cha,Sejong Heo,Chan Gook Park 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10

Lunar rover plays a key role in lunar exploration based on its maneuverability. For the successful operation of the lunar rover, a high-accuracy navigation technique has to be obtained. In order to perform high-accuracy inertial navigation, the accuracy of initial alignment is important. In general, initial alignment can be divided into two processes, coarse and fine alignment. In the general coarse alignment process, the acceleration and rotation rate of the stationary rover are used as reference vectors. However, the acceleration and rotation rate of the Moon are 1/6 and 1/27 times smaller than those of the Earth, respectively. As a result, even though the same sensors are used, the performance of initial coarse alignment gets worse on the Moon. In this paper, three coarse alignment methods using accelerometers and sun sensor, instead of accelerometers and gyros, are proposed and the associated errors are analyzed. For comparison, the existing general coarse alignment algorithms are summarized. The analyses are verified by appropriate computer simulations, and it shows that the proposed algorithms greatly improve the performance of coarse alignment, outperforming the existing algorithms at least on the Moon. Therefore, the proposed algorithm is suitable for lunar rover application, and can also be applied to other planetary explorations.

The Effects of Scapular Alignment Exercise and Nerve Mobilization on Pain and Muscle Activity in Subjects with Scapular Depression Alignment

석종호,김태호 KEMA학회 2020 근골격계과학기술학회 Vol.4 No.2

Background: Scapular depression syndrome is associated with weakness or elongation in the upper trapezius and a lower pressure pain threshold. Purpose: This study aimed to compare the pressure pain thresholds of the upper trapezius and median nerve trunks and muscle activity during shoulder flexion before and after scapular alignment exercises and nerve mobilization in subjects with scapular depression alignment. Study design: Two-group pre- and post-test design Methods: The subjects were 30 men with scapular depression alignment aged 20–40 years old. Thirty subjects were randomly divided into the nerve mobilization group (n=15) and the scapular alignment exercise group. The scapular alignment exercise group repeated the scapular setting exercise 15 times a session while maintaining 1 min per trial, and the nerve mobilization group performed five sets of nerve mobilization, with set including 10, 12, 14, 16 and 20 times. The subjects were measured in terms of the pressure pain threshold and muscle activity during shoulder flexion. The pressure pain threshold was measured in the median nerve and upper trapezius. Muscle activity was measured in the upper trapezius, lower trapezius, and serratus anterior muscles during 120° shoulder flexion. Results: There was a significant increase in the pressure pain threshold of the upper trapezius before and after intervention in the scapular alignment exercise group (p<0.05). A significant increase in the muscle activity of the serratus anterior before and after intervention was observed in the scapular alignment exercise group (p<0.05), and a significant difference was found in the muscle activity of the serratus anterior between the two groups according to the intervention (p<0.05). Conclusions: The scapular alignment exercises enable subjects with scapular depression alignment to reduce the mechanical sensitivity of muscles and nervous tissues and bring immediate activation in muscle activity of serratus anterior. This study recommend that scapular alignment exercise could help scapular depression syndrome as a therapeutic exercise method in clinical field.

The effects of increased unilateral and bilateral calcaneal eversion on pelvic and trunk alignment in standing position

( Jaehoon Yi ) 물리치료재활과학회 2016 Physical therapy rehabilitation science Vol.5 No.2

Objective: Generally, it is known that there is a correlation between excessive calcaneus eversion and a patient with low back pain and it also affects pelvic alignment. However, there are not enough studies that show calcaneal eversion having an effect on the alignment of the trunk. Design: Cross-sectional study. Methods: A 3-dimensional motion analysis system was used to assess the lower limbs, pelvic alignment, and trunk alignment with increased unilateral and bilateral calcaneal eversion in twenty-one subjects. All subjects were asked to maintain a static posture for seven seconds on a wedge three times per posture for measurement and analysis purposes. The wedge used in the process was a lateral wedge with a 10-degree tilt to the lateral direction. To unify all of the subjects` foot position, the front and inner side of the wedge were marked. The height of the tilted wedge`s inner side and flat wedge were balanced equally in order to be able to maintain the lateral part of the foot to the same height when producing an increased calcaneal eversion. Results: Comparing the changes in trunk and pelvic alignment in accordance to calcaneal eversion for each posture, there was a significant different in the X and Y-axis for each posture, but not in the Z-axis (p<0.05). Thus, it can be confirmed that calcaneal eversion in the sagittal plane and frontal plane may have and effect on the pelvis and the trunk. Conclusions: Postures with increased bilateral and unilateral calcaneal eversion has an effect on pelvic alignment, but does not cause any changes in trunk alignment.

Vertical Alignment of Liquid Crystal on Film of Plant-based Polysaccharide Derivatives

조연수,문지현,양다은,강효 한국고무학회 2023 엘라스토머 및 콤포지트 Vol.58 No.1

In this study, we investigate the liquid crystal (LC) alignment of LC cells created from plant-based polysaccharide derivatives, such as guar gum. Guar gum films exhibit satisfactorily high optical transparency in the visible light region (400-750 nm). For example, the transmittance of polyimide films, which are the most typically used LC alignment layers, is 87%, whereas that of guar gum films deposited onto a glass substrate at a wavelength of 550 nm is approximately 99%. The observed LC alignment depends on the rubbing depth. For example, an LC cell comprising a guar gum film fabricated via rubbing at rubbing depths of 0.1, 0.2, 0.3, and 0.4 mm exhibits a planar LC alignment, whereas it exhibits a vertical LC alignment at a rubbing depth of 0.5 mm. Additionally, the LC alignment is shown to be correlated with the total surface energy of the guar gum films. When the total surface energy of a rubbed guar gum film exceeds 58.10 mJ/m2, an LC cell comprising the guar gum film exhibits a stable and vertical LC alignment. Therefore, guar gum can be used to realize the vertical alignment system of LC via a simple adjustment of the rubbing depth.

A Model-Based Method for Information Alignment

Namyoun Choi,Il-Yeol Song,Yongjun Zhu 한국정보과학회 2016 Journal of Computing Science and Engineering Vol.10 No.3

We propose a model-based method for information alignment using educational standards as a case study. Discrepancies and inconsistencies in educational standards across different states/cities hinder the retrieval and sharing of educational resources. Unlike existing educational standards alignment systems that only give binary judgments (either “aligned” or “not-aligned”), our proposed system classifies each pair of educational standard statements in one of seven levels of alignments: Strongly Fully-aligned, Weakly Fully-aligned, Partially-aligned***, Partially-aligned**, Partially-aligned*, Poorly-aligned, and Not-aligned. Such a 7-level categorization extends the notion of binary alignment and provides a finer-grained system for comparing educational standards that can broaden categories of resource discovery and retrieval. This study continues our previous use of mathematics education as a domain, because of its generally unambiguous concepts. We adopt a materialization pattern (MP) model developed in our earlier work to represent each standard statement as a verb-phrase graph and a noun-phrase graph; we align a pair of statements using graph matching based on Bloom’s Taxonomy, WordNet, and taxonomy of mathematics concepts. Our experiments on data sets of mathematics educational standards show that our proposed system can provide alignment results with a high degree of agreement with domain expert’s judgments.

그래프 기반 분산처리 시스템 트리니티를 이용한 서열 정렬 알고리즘

이준수,여윤구,노홍찬,윤영미,박상현 한국정보과학회 2014 데이타베이스 연구 Vol.30 No.1

Sequence alignment is one of the widely used tools in genomics. Recently, after NGS(NextGeneration Sequencing) technology was developed, the production of sequence read data increaseddramatically. A number of sequence alignment algorithms have been developed for processing theseNGS data. However, these algorithms are suffered from a trade-off between throughput andalignment quality, because there is a large computation cost for handling the repeat reads andpolymorphism. On the contrary, alignment algorithms with distributed system such as Hadoop andTrinity can obtain better throughput without compromising alignment quality than existingalgorithms on single machine. In this paper, we suggest SAG, sequence alignment algorithm basedon graph with in-memory distributed system, Trinity proposed by Microsoft. We transformedreference sequence into a graph form, and added new edge between adjacent node havingconnection possibility on graph. And we performed combination of sequence fragments in order tocandidates allowing polymorphism. Finally, we performed glocal alignment to find final results forthe obtained candidates. Our experimental results show that SAG better throughput with samequality or better quality than existing algorithms with Hadoop. We have also proved scalability thatwe obtained better throughput by simply adding machines. 유전체학(Genomics)에서 서열정렬은 가장 널리 사용된다. 차세대 시퀀싱(Next Generation Sequencing) 기술이 발전하면서, 최근 서열 리드 데이터의 양이 급격하게 증가했다. 급증한 차세대 시퀀싱 데이터를 처리하기 위한 서열정렬 알고리즘이 많이 개발되었다. 하지만 서열정렬 알고리즘들은 반복서열(repeat), 변이(polymorphism)를 처리하기 위해 많은 계산량을 요구한다. 그렇기 때문에 기존 서열정렬 알고리즘은 처리량(throughput)과 정렬품질(quality)사이에 트레이드오프(trade-off)가 존재한다. 하지만 분산처리 시스템Hadoop, Trinity에서 동작하는 정렬 알고리즘은 기존 싱글에서 동작하는 알고리즘에 비해 정렬 품질을 덜 희생하고, 더 높은 처리량을 얻을 수 있다. 본 논문에서는 Microsoft에서 제안한 그래프 기반 인-메모리(in-memory)분산시스템 트리니티(Trinity)에서 동작하는 서열정렬 알고리즘 SAG(Sequence Alignment Algorithm basedon Graph with Trinity)를 제안한다. 우리는 기존 참조 서열을 그래프 형태의 데이터로 변형 한 뒤, 그래프에서연결 가능한 인접한 노드에 새로운 간선을 추가했다. 그리고 변이(polymorphism)를 허용하는 정렬을 수행하기위해 서열조각들 사이의 조합을 통해 후보를 얻었다. 마지막으로 후보를 대상으로 glocal alignment를 수행해최종적인 결과를 찾았다. 실험을 통해 SAG는 기존 Hadoop에서 동작하는 알고리즘과 비교했을 때 비슷하거나더 좋은 정렬 품질조건과 동시에 상당히 높은 처리량을 얻었다. 또한 머신을 추가함으로써 더 좋은 처리량을 얻는확장성을 입증하였다.

적응형 시간지연 보상을 통한 관성항법장치 급속초기정렬기법

이형섭(Hyung-Sub Lee) 대한전기학회 2018 전기학회논문지 Vol.67 No.3

In this paper, a SDINS(strapdown inertial navigation system) rapid initial alignment technique with adaptive time delay compensation is proposed. The proposed method consists of two steps. In first step, misalignment and data latency are estimated by conducting pre-transfer alignment. Then, hybrid alignment is designed to rapidly find the misalignment changes induced by pyro-shock. To improve the performance of hybrid alignment, adaptive time delay compensation method is suggested. We verify the performance improvement of the proposed alignment scheme comparing with the conventional transfer alignment method by van test. The test result shows that the proposed alignment technique improves alignment performance.

A Model-Based Method for Information Alignment: A Case Study on Educational Standards

Choi, Namyoun,Song, Il-Yeol,Zhu, Yongjun Korean Institute of Information Scientists and Eng 2016 Journal of Computing Science and Engineering Vol.10 No.3

We propose a model-based method for information alignment using educational standards as a case study. Discrepancies and inconsistencies in educational standards across different states/cities hinder the retrieval and sharing of educational resources. Unlike existing educational standards alignment systems that only give binary judgments (either "aligned" or "not-aligned"), our proposed system classifies each pair of educational standard statements in one of seven levels of alignments: Strongly Fully-aligned, Weakly Fully-aligned, Partially-$aligned^{***}$, Partially-$aligned^{**}$, Partially-$aligned^*$, Poorly-aligned, and Not-aligned. Such a 7-level categorization extends the notion of binary alignment and provides a finer-grained system for comparing educational standards that can broaden categories of resource discovery and retrieval. This study continues our previous use of mathematics education as a domain, because of its generally unambiguous concepts. We adopt a materialization pattern (MP) model developed in our earlier work to represent each standard statement as a verb-phrase graph and a noun-phrase graph; we align a pair of statements using graph matching based on Bloom's Taxonomy, WordNet, and taxonomy of mathematics concepts. Our experiments on data sets of mathematics educational standards show that our proposed system can provide alignment results with a high degree of agreement with domain expert's judgments.