Variation simulation and diagnosis considering in-plane/out-of-plane welding distortion

Lee, Hyeonkyeong,Chung, Hyun The Society of Naval Architects of Korea 2019 International Journal of Naval Architecture and Oc Vol.11 No.1

Geometric variation including welding distortion accumulates as many parts are joined together, ultimately affecting the final product. This variation is then subjected to correction, which requires considerable effort, time, and cost. This variation can be categorized as in-plane/out-of-plane variation. To date, studies on variation simulation have largely focused on the out-of-plane variation, however the variation generated in the in-plane direction requires more time and efforts to correct afterwards. This research aims to construct a variation simulation model considering both the in-plane and out-of-plane variations. A geometric analysis was performed to derive an equation that reflects the coupling effect of the out-of-plane variation on the in-plane variation. The proposed model is validated with case study analysis and the results shows that good fidelity in predicting and diagnosing the in-plane variation during the block assembly process considering welding distortion.

Variation simulation and diagnosis considering in-plane/out-of-plane welding distortion

Hyeonkyeong Lee,Hyun Chung 대한조선학회 2019 International Journal of Naval Architecture and Oc Vol.11 No.1

Geometric variation including welding distortion accumulates as many parts are joined together, ultimately affecting the final product. This variation is then subjected to correction, which requires considerable effort, time, and cost. This variation can be categorized as in-plane/out-of-plane variation. To date, studies on variation simulation have largely focused on the out-of-plane variation, however the variation generated in the in-plane direction requires more time and efforts to correct afterwards. This research aims to construct a variation simulation model considering both the in-plane and out-of-plane variations. A geometric analysis was performed to derive an equation that reflects the coupling effect of the out-of-plane variation on the in-plane variation. The proposed model is validated with case study analysis and the results shows that good fidelity in predicting and diagnosing the in-plane variation during the block assembly process considering welding distortion.

관용구의 변이형과 사전의 표제어 설정에 대한 연구

권경일(Kwon Kyung-il) 한국사전학회 2010 한국사전학 Vol.- No.15

The purpose of this study is to clarify the lexical variation and systematic variation of Korean Idioms to explore the characteristics of patterns and investigate their features and title of idioms in dictionary. Idioms can be defined as multiple word units that contain fixdeness and idiomaticity. Fixedness is a key property of idioms, yet some of idioms have two or more variation on their form. The variation divided into lexical variation and systematic variation. Idioms are usually known as fixed unit but they have variations present with various expressive effects. The variation of idioms can be classified into lexical variation, systematic variation. The lexical variations has verb variations, noun variations, adjective, truncation etc. The reason of variation is expressive effectiveness of idioms. The variation of idioms has difference with modification of idioms whether they have difference of lexical meaning. The variation of idioms reflect relation of literal meaning of idioms. These feature of idoms must be presented in dictionary for learner to study usage of idioms. It is necessary to explore and analyze various characteristics of idioms that express and deliver ideas.

성서 히브리어의 언어 변이

김동혁 한국구약학회 2022 구약논단 Vol.28 No.1

The present study explores language variation in Biblical Hebrew from a sociolinguistic perspective. Language variation refers to the situation in which the same linguistic or grammatical meaning is realized by two or more forms (e.g., both mamlākāh and malkût in Biblical Hebrew mean “kingdom” or “reign”). So far, language variation in Biblical Hebrew has been studied mainly in the context of the Documentary Hypothesis of the Pentateuch. However, a field that focuses primarily on this phenomenon is sociolinguistics. Thus, upon defining language variation, the study surveys how linguists of the past regarded it as unimportant and arbitrary and how contemporary sociolinguists consider it foundational in understanding language. Language variation includes historical (or chronological) variation, regional variation, and social variation. The study examines the cases in Biblical Hebrew which represent these three kinds of language variation. First, mamlākāh and malkût (“kingdom”, “reign”) are an exemplar of historical variation, the choice of which in the Hebrew Bible is best explained by chronology. Second, the two relativizers ’ăšer and še- and the near homonyms šibbolet and sibbolet each illustrate regional variation. The first pair shows the contrast between the southern Judahite Hebrew and the northern Israelian Hebrew. The second pair discloses the difference of the consonant repertoire between the Gileadites and the Ephraimites. Last, in referring to oneself, the Biblical Hebrew speaker could choose from the first person singular pronoun and ‘abdĕkā/’ămātĕkā/šipḥātĕkā (“your servant”). The choice is conditioned by factors such as situation and the social statuses of the speaker and the addressee. Through studying language variation from a sociolinguistic perspective, we will have a deeper understanding of the language of Biblical Hebrew, the literary strategies of biblical writers, and the world of the Hebrew Bible.

Genetic and epigenetic variation in mass selection populations of Pacific oyster Crassostrea gigas

Qun Jiang,Qi Li,Hong Yu,Lingfeng Kong 한국유전학회 2013 Genes & Genomics Vol.35 No.5

Selective breeding often produces an improvementin phenotype. Much of the phenotypic change withina species is a consequence of genetic variation. However,there is growing evidence for phenotypic change even inthe absence of DNA sequence polymorphisms, termedepigenetic variation. This study’s goal was to investigatethe genetic and epigenetic variation in the mass selectionpopulations of the Pacific oyster (Crassostrea gigas),determine if any correlation exists between the genetic andepigenetic variations. This can serve as a first step ininvestigating the potential role epigenetic variations havein selective breeding. Amplified fragment length polymorphismanalysis and methylation-sensitive amplifiedpolymorphism methodology were used to monitor geneticand epigenetic variation in two populations (the base stockand the third selected generation) from a mass selectionline in the Pacific oyster. The correlation between geneticand epigenetic variation was evaluated by Co-InertiaAnalysis. The genetic difference was mainly found in thegene frequency shift revealed by the FST value (0.0151,P\0.01) and no significant reduction in genetic diversitywas detected. The percentage of methylation in C. gigaswas 26.4 %. No significant difference was observed on theaverage state of methylation, but a few bands showed differentfrequencies between the two populations. Co-InertiaAnalysis revealed a significant association between thegenetic and epigenetic profiles (P\0.01). Selective breeding often produces an improvement in phenotype. Much of the phenotypic change within a species is a consequence of genetic variation. However, there is growing evidence for phenotypic change even in the absence of DNA sequence polymorphisms, termed epigenetic variation. This study’s goal was to investigate the genetic and epigenetic variation in the mass selection populations of the Pacific oyster (Crassostrea gigas), determine if any correlation exists between the genetic and epigenetic variations. This can serve as a first step in investigating the potential role epigenetic variations have in selective breeding. Amplified fragment length polymorphism analysis and methylation-sensitive amplified polymorphism methodology were used to monitor genetic and epigenetic variation in two populations (the base stock and the third selected generation) from a mass selection line in the Pacific oyster. The correlation between genetic and epigenetic variation was evaluated by Co-Inertia Analysis. The genetic difference was mainly found in the gene frequency shift revealed by the FST value (0.0151, P\0.01) and no significant reduction in genetic diversity was detected. The percentage of methylation in C. gigas was 26.4 %. No significant difference was observed on the average state of methylation, but a few bands showed different frequencies between the two populations. Co-Inertia Analysis revealed a significant association between the genetic and epigenetic profiles (P\0.01).

Investigation of Influential Factors of a Brake Corner System to Reduce Brake Torque Variation

김선호,한은준,강상욱,Sungsun Cho 한국자동차공학회 2008 International journal of automotive technology Vol.9 No.2

This paper investigates the brake corner system to reduce brake torque variation in the brake judder problem. A numerical model for determining brake torque variation was constructed using the multi-body dynamics model. Using this model, the brake torque variation for a given disc thickness variation was obtained in the time domain. The multi-body dynamics model was verified by a dynamometer test via the comparison of brake torque variation and load distribution patterns of the pad. To reduce the simulation time and cost required to determine factors that influence the reduction in brake torque variation, a simple mathematical model was constructed and used to determine both the brake torque variation and influential factors. The multi-body dynamics model and dynamometer test were modified on the basis of the results of the simple mathematical model and deformed shape of the multi-body dynamics model. These influential factors were verified to reduce the brake torque variation. This paper investigates the brake corner system to reduce brake torque variation in the brake judder problem. A numerical model for determining brake torque variation was constructed using the multi-body dynamics model. Using this model, the brake torque variation for a given disc thickness variation was obtained in the time domain. The multi-body dynamics model was verified by a dynamometer test via the comparison of brake torque variation and load distribution patterns of the pad. To reduce the simulation time and cost required to determine factors that influence the reduction in brake torque variation, a simple mathematical model was constructed and used to determine both the brake torque variation and influential factors. The multi-body dynamics model and dynamometer test were modified on the basis of the results of the simple mathematical model and deformed shape of the multi-body dynamics model. These influential factors were verified to reduce the brake torque variation.

혈액검사실에서 일상정도관리를 위한 작업군내 변이와 작업군간 변이의 비교분석에 대한 연구

박지영,장상우,장석배,김완 대한임상병리사협회 1993 대한임상병리사회지 Vol.25 No.1

자궁경부암의 고선량율 강내치료 선량계획 분석

채규영,Chai, Gyu-Young 대한방사선종양학회 1994 Radiation Oncology Journal Vol.12 No.3

Purpose : This study was done to confirm the reference point variation according to variation in applicator configuration in each fractioation of HDR ICR. Materials and Methods : We analyzed the treatment planning of HDRICR for 33 uterine cervical cancer patients treated in department of therapeutic radiology from January 1992 to February 1992. Analysis was done with respect to three view points-Interfractionation A point variation, interfractionation bladder and rectum dose ratio variation, interfractionation treatment volume variation. Interfractionation A point variation was defined as difference between maximum and minimum distance from fixed rectal point to A point in each patient. Interfractionation bladder and rectum dose ratio variation was defined as difference between maximum and minimum dose ratio of bladder or rectum to A point dose in each patient, Interfractionation treatment volume variation was defined as difference between miximum and minimum treatment volume which absorbed over the described dose-that is, 350 cGy or 400 cGy-in each patient. Results The mean of distance from rectum to A point was 4.44cm, and the mean of interfractionation distance variation was 1.14 cm in right side,1.09 cm in left side. The mean of bladder and rectum dose ratio was $63.8\%$ and $63.1\%$ and the mean of interfractionation variation was $14.9\%$ and $15.8\%$ respectively. With fixed planning administration of same planning to all fractionations as in first fractionation planning-mean of bladder and rectum dose ratio was $64.9\%$ and $72.3\%$.and the mean of interfraction variation was $28.1\%$ and $48.1\%$ reapectively. The mean of treatment volume was $84.15cm^3$ and the interfractionation variation was $21.47cm^2$. Conclusion : From these data, it was confirmed that there should be adapted planning for every fractionation ,and that confirmation device installed in ICR room would reduce the interfractionation variation due to more stable applicator configuration.

On Toponymic Variations Engendered by Phonetic Variations

김정태 한국학중앙연구원 한국학중앙연구원 2012 Korea Journal Vol.52 No.1

This study is an analysis of phonemic variation and its relationship with toponymic variations. The phonemic variation instantiated in a toponym initially resulted in the variation of toponymic forms. Then, through homonymic attraction, the variant toponymic forms change the meaning of toponyms. On the one hand, there are pronounced processes in toponymic front morphemes, such as replacement, deletion, and contraction of phonemes, which include palatalization, articulation place assimilation, umlaut, vowel rising, and monophthongization. These aforementioned processes have a variation of toponymic forms that are brought about by phonemic variation. Moreover, through homonymic attraction, the ariant forms of toponymic front morphemes engender variation in the meaning of toponyms. On the other hand, in toponymic back morphemes, honemic variations come about only with replacement and deletion. Therefore, the phonemic variation in both front and back toponymic morphemes adapts to the phonemic variation in common, everyday language. And because the lexicon that undergoes variation is chiefly those that represent toponymic particularities, it frequently appears in toponyms.

변이의 패턴과 패턴의 변이: 한국어 자음연쇄 변이의 사례

김한결 ( Kim Hankyul ),김선회 ( Kim Sun-hoi ) 한국현대언어학회 2016 언어연구 Vol.32 No.3

The Journal of Studies in Language 32.3, 447-474. This paper explores the characteristics of consonant cluster variation in Korean, focusing on three types of clusters, i.e., `lp` (ㄼ), `lk` (ㄺ), `lm` (ㄻ). Data were collected from 16 Seoul Korean speakers of their twenties. Between-speaker variation, within-speaker variation and between-item variation were analyzed. It is shown that the speakers should be divided into some groups each of which has its own characteristics of variation. In addition, it is argued that phonological environment, lexical category, morphological information, and perceptual cues affect the occurrence/non-occurrence of variation in the production of consonant clusters. It is also argued that variation occurs meaningfully when there is conflict among these factors while it rarely or never occurs when there is no conflict among them. (Cornell University ? Chung-Ang University)