A case study of gear wheel material and heat treatment effect on gearbox strength calculation

Silvia Maláková,Anna Guzanová,Dagmar Draganovská,Gabriel Fedorko,Vieroslav Molnár 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.12

The paper is focused on the influence of gearing material and thermal or chemical-thermal processing of wheels on the results of the strength calculation carried out in accordance to the standard, in particular on the safety factor. This effect is examined on a gearbox that was part of the steel coil production line in the integrated steel plant. Due to changes in production, the load on the gears increased. Thus, the result of this work is the selection of new materials for the two-speed gearbox and their heat treatment to meet the safety conditions of the gearing mechanism without changing the geometrical parameters of the gearbox.

무용전공여대생의 신체구성에 관한 비교연구

김말애,임석옥,김민정 경희대학교 체육과학연구소 1997 體育學論文集 Vol.25 No.-

The purpose of this study is to investigate the body composition of female by part of dance major in university. For this purpose a total of 32 female students, attending university K in Seoul participated in the study. The subjects were selected randomly 24 female students majored in dance in university(Korean dance: 8, Modern dance: 8, Ballet: 8), and 8 regular female students, who did not have any dance experience. The results of the study were as follows; 1.Skinfolds thickness 1)In factors of triceps showed in Control group 17.71±7.97 mm, Korean dance group 12.98±3.14mm, Modern dance group 11.85±3.48 mm, Ballet group 11.11 ±3.48 mm. Among these group there was significantly(p<.05). 2)In factors of subscapular showed in Control group 11.26±4.59 mm, Modern dance group 9.33± 2.29 mm, Korean dance group 9.13± 1.52 mm, Ballet group 8.74±2.53 mm. Among these group there was no significantly. 3)In factors of abdomen showed in Control group 12.29±5.24 mm, Modern dance group 7.75±2.94mn, Korean dance group 8.58 ± 3.36 mm, Ballet group 6.97± 2.27 mm. Among these group there was significantly (p<.05). 4)In factors of thigh showed in Control group 21.51±8.22 mm, Korean dance group 76.30± 1.92 mm, Modern dance group 15.45±3.08 mm, Ballet group 14.45±3.94 mal. Among these group there was significan11y(P<.05). 2.Body fat 1)In factors of body density showed in Ballet group 1.0633 ±0.0072 g/ml. Modern dance group 1.0615±0.0059 g/ml. Korean dance group 1.0602±0.0031 g/ml, Control groupp 1.0512±0.0144 g/ml Among these group there was significantly(P<.05). 2)In factors of %fat showed in Control group 20.59±6.11 %, Korean dance group 76.82± 1.24 %, Modern dance group 16.34±2.41 %, Ballet group 15.61 ±2.95 %, 킬song these group there was significantly ( p<.05). 3)In factors of fat showed in Control group 10.87±5.62 kg, Korean dance group 8.45± 1.21 kg. Modern dance group 8.14± 1.49 kg, Ballet group 7.76± 1.81 kg. Among these group there was no significantly. 4)In factors of LBM showed in Ballet group 41.67±4.04 kg, Korean dance group 41.61±3.14 kg, Modern dance group 41.51 ±2.47 kg, Control group 39.76±3.36 kg. Among these group there was no significantly.

담낭 적출술 환자의 통계적 고찰(Ⅱ) : 진주와 그 주변 지역을 중심으로(지역적 특성에 관한 고찰) For Evaluation in Chinju and It's surrounding Area(To District characteristic)

姜末順 진주간호보건전문대학 1986 진주간호보건전문대학 논문집 Vol.9 No.1

動作 分析法 硏究 : Choreometrics 分析法을 中心으로 Choreometrics

金末愛,安秉珠 慶熙大學校 1992 論文集 Vol.21 No.-

Dance was once considered an expression of individual feeling, but many studies have shown that dance is more related to cultural pattern. Foreign countries have recently more accessible, and interest in other cultures has therefore increased. Intra-cultural dance styles are also part of search for deeper understanding of dance as a cultural and universal experience, as well as the different elements in apparently foreign culture. The paper was studied Alan Lomax's Choreometrics, a dance-work rating system, as a methodology of understanding certain basic cultural aspects of dance. Its descriptive coding system includes study of the followings: (a) body parts habitually involved, (b) the body attitude, (c) nature of transition.

한국제조기업의 품질비용 행태에 관한 연구

黃末東 慶南大學校 産業經營硏究所 1999 産業經營 Vol.24 No.-

<ABSTRACT>When the expression "quality" is used, we usually think in terms of an excellent product or service that fulfills or exceeds our expectations. These expectations are based on the intended use and the selling price. For example, a customer expects a different performance from a plain steel washer than from a chrome-plated steel wasger because they are a different grade. When a product surpasses our expectations we consider that quality. Thus, it is somewhat of an intangible based on perception.According to ANSI/ASQC Standard A3-1987, quality is the totality of features and characteristics of a product or service that bear on its ability to satisfy implied or stated needs. Stated needs are determined by the contract, whereas implied needs are a function of the market and must be identified and defined. These needs involve safety, availability, maintainability, reliability, usability, economics (price), and environment. Price is easily defined by some monetary unit such as dollars. The other needs are defined by translating the features and characteristics for the manufacture of a good product or the delivery of a service into specifications. Conformance of the product or service to these specifications is measurable and provides a quantifiable and operational definition of quality. If the specifications do not satisfy the customer needs (fitness for use). they should be changed. Needs usually change over time. thereby requiring a periodic reevaluation of specifications.Quality control is the use of techniques and activities to achiecve, sustain, and improve the quality of a product or service. It involves intergrating the following related techniques and activities : 1. Specifications of what is needed 2. Design of the product or service to meet the specifications 3. Production or installation to meet the full intent of the specifications 4. Inspection to determine conformance to specifications 5. Review of usage to provide information for the revision of specifications if needed Utilization of these activities provides the customer with the best product or service at the lowest cost. The aim should be continued quality improvement. Statistical quality control(SQC) is a branch of quality control. It is the collection. analysis, and interpretation of data for use in quality control activities. While mush of this book emphasizes the statistical approach to quality control, this is only a part of the total picture. Statistical process control(SPC) and acceptance sampling are the two major parts of SQC. A number of different techinques are needed. All the planned or systematic actions necessary to provide adequate confidence that a product or service will satisfy given requirements for quality is called quality assurance. It involves making sure that quality is what it should be. This includes a continuing evaluation of adequacy and effectiveness with a view to having timely corrective measures and feedback initiated where necessary. There is a distinct difference between quality control and quality assurance. Quality control is involved with the activities of specification, design, production or installation, inspection, and review of usage. These activities are the responsibility of the functional areas. Quality assurance is involved with these activities as well as the entire quality system. The generic elements of a quality system are given later in the quality manatgement.

리튬-보란계에 의한 유기화합물의 선택환원

尹末淑,金永植,車震淳 嶺南大學校附設 基礎科學硏究所 1986 基礎科學硏究 Vol.6 No.-

A systematic study on the reaction of the lithium-borane system in tetrahydrofuran with representative organic compounds under standardized conditions (THF, 0℃, H?/compd=4/1) has been carried out in order to characterize the reducing characteristics and entity of this reducing system. Most aldehydes and ketones are reduced rapidly to the alcohol stage. Carboxylic acids and acid chlorides are rapidly reduced to corresponding alcohol stages are reduced only slowly. Nitro compounds are very slowly reduced and sulfur compounds are essentially inert to this reducing system. Consequently, this system possesses both reducing characterictics of borane, an acidic type, and lithium borohydride, a basic type.

고등학교 체육 교육과정에 나타난 교육목표 분석

김말희 이화여자대학교 체육대학 1984 建美 Vol.- No.17

人口抑制의 經濟的 動因 分析

李末南 啓明大學校 産業經營硏究所 1980 經營經濟 Vol.13 No.1

Karea boast one of the most rapid rates of economic development in the world over the past 18 years. Korea is also in the midst of the demographic transition. Korea is known as a country which has successfully accomplished a substantial reduction in population growth within a relatively short period of time, Korea has reduced the annual rate of growth of its population from 2.88 percent in 1961 to 1.99 percent in 1975. This remarkable achievement was made possible by the ambitious national programs supported by a substantial amount of domestic and foreign funds, as well as active participation of voluntary agencies. Undoubtedly it was greatly aided by the successful economic development and upgrading of the level living standard during the 1960's and 1970's Recently, however, the annual rate of growth of population became stationary, and show no sign of further decline in spite of many efforts. This phenomenon is considered as the serious hurdle be overcome. Our current national policy target is to reduce the rate to 1.0 level by the end of the Fifth Five Year Plan in 1968. The first part of the study is to develop a theoretical framework to relate the problem of the economic incentive scheme to the parent's decision for the size of family. An attempt is made to estimate such function on the basis of appropriate cross-section sample data in the province of Kyung-Buk. This province covers areas including large urban centers, industrial estate areas, traditional farming areas and fishing village areas. The second part of the study is based on the interview and questionnaire survey which is conducted to ascertain the reaction of the populace toward the educational bonus scheme for the children of the parents accepting the effective family control scheme. All informations was collected by the personal interviews with sample men and women selected on the basis of the questionnaire developed for the purpose. The questionnaire that finally emerged includes nine subsections: 1. general information on the household being interviewed, 2. respondent's attitude toward his or her children's education, 3. respondent's reaction toward the educational bonus scheme, 4. cost of bringing up children as perceived by the respondent, 5. value of children as perceived by the respondent, 6. economic utility of children as perceived by the respondent, 7. measurement of household income, 8. measurement of assets held by the household, 9. fertility records of the respondent or his wife, media, sex education or direct persuasion might well make use of the passive incentive scheme. Third, the educational bonus as a economic incentive scheme for the family control stimulate the family planning acceptances.

사실자료를 활용한 프랑스어 교육의 예시

유말희 경기대학교 인문과학연구소 2006 시민인문학 Vol.14 No.-

집단관리기법에 의한 생산시스템에 관한 연구

黃末東 慶南大學校 産業經營硏究所 2002 産業經營 Vol.30 No.-