• Journal of the Korea Academia-Industrial cooperation Society
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• v.2 no.1
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• pp.13-17
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• 2001

The configuration design of kinematic mechanisms of industrial sewing machine has been studied using a functional approach. The configuration design methodology has been applied to shorten the development cycle time of mechanisms and to manage design data efficiently Expert system has been used to embody the decomposition of functional requirements. It has been interfaced with a CAD system through the API program to show the assembly and parts of the mechanism. Constraints also can be handled by the expert system through the rule induction and the case based reasoning process. The configuration design system includes the kinematical analysis and optimization of the mechanisms of an industrial sewing machine by the interface between the expert system and an analysis program by means of API Program supplied by expert system. The conceptual design of sewing machine mechanism can be Performed rapidly and efficiently.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.207-210
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• 2014

Damage is increasing by (Smishing) hacking attack Smishing you use a smart phone after entering 2013. Takeover of personal information and direct financial damage in collaboration with graphics sewing machine hacking attack has occurred. Monetary damage that leads to Internet payment service (ISP) and secure payment system in conjunction with graphics sewing machine hacking attack on a smartphone has occurred. In this paper, I will study analysis in the laboratory examples of actual infringement vinegar sewing machine hacking attack. It is a major power security measures to prevent damage to the secure payment system that a case analysis and practical principle technical nest sewing machine hacking attack, using Smishing. In this paper, I will be to research to be able to through a smart phone, to the online payment safer and more convenient.

• Journal of the Korean Society for Precision Engineering
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• v.14 no.10
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• pp.35-43
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• 1997

In this paper, we perform a mechanism analysis and optimal design of the feeding system in a industrial sewing machine. Sewing machines are classified by the transfer mechanism as (1) transferred by feeddog only (2) transferred by feeddog and needle (3) transferred by feeddog, needle and pressure bar. The sewing machine classified as (2) is studied which is more efficient in transferring fabrics than the machine classified as (1). In analyzing the mechanism, we divide the feeding mechanism as feeddog mechanism and needle bar mechanism. The two mechanisms are conneted with each other kinematically because fabrics are transferred by two needles and a feeddog simultaneously and stitched by two needles which pass through the feeddog in every stitch cycle. We define good stitch as coincidence of stitch between the forward and reverse motion of feeding. We optimize the feeding mechanism for that purpose. It is illustrated that stitching performance of the optimized mechanism is compared to original feeding mechanism.

• Journal of the Korean Society of Clothing and Textiles
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• v.21 no.6
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• pp.1010-1020
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• 1997

For this study, we did needlework of the sample considering practical aspects of production and consumption of silk, high-quality material for women's clothes, and then analyzed the state of the seam puckering after press and dry cleaning, estimated the Seam Puckering based on the mechanical properties of silk related to machine sewing, and examined the effects which Mechanical Properties have on Seam Puckering closely. Through this, we reach the following conclusion. 1. There are three types of seam puckering for each stage, which are caused bathe smoothness of the surface by press, and the difference between the shrinkage rates of fabric and sewing thread by Dry Cleaning. 2. In analyzing seam puckering classified by each step, seam puckering after sewing the fabric is related to WT negatively, while to RT and W positively. Seam puckering after sewing and pressing the fabric is related to WT, RC, MMD negatively and seam puckering after sewing, pressing anddry cleaning the fabric isrelated to WT negatively, too. 3. Concerning the mechanical properties of the sample with a little seam puckering, WT, LC, WC, RC, MMD, SMD is relatively large while RT, B, 2HB is small. 4. Judging from the result of estimating seam puckering based on mechanical properties, the estimate-formula is satisfied in this study.

• Journal of environmental and Sanitary engineering
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• v.21 no.4 s.62
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• pp.19-28
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• 2006

The purpose of this study was to investigate the related factor for the prevalence of musculoskeletal symptoms among 212 sewing worker. The survey was performed with self-administered questionnaire for the risk factors related to musculoskeletal disorders(MSDs) from August 5 to 7 in 2005. The prevalence of musculoskeletal symptoms were 75.8% and the those of the local symptoms were 71.7 % for shoulder, 60.4 % for neck, 35.8 % for arm and 50.9 % for wrist. The risk factors related the self-reported MSDs had not shown in general characteristics. But, there was a significant difference between daily working hour and wrist, working speed and neck, the degree of satisfaction and wrist for work related factor. Also, it was shown the significant difference between chair height and neck, the height of sewing machine and wrist among the space below work station, neck, waist for the prevalence of musculoskeletal symptoms. The significant correlation was shown for daily working hour and wrist, working speed and arm, work load and shoulder and the degree of satisfaction and arm for work related subjective symptom. Considering above results, it is suggested the ergonomic design be provided to working hour, the height of chair and work station as well as daily working hour even there is a significant difference for the prevalence of symptoms in each body part for sewing workers.

• Journal of the Korea Fashion and Costume Design Association
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• v.11 no.1
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• pp.133-153
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• 2009

Clothing was excavated when the Bae's clan of Seong-san, Yeong-dong, Chung-buk in Sep. 2, 2004. The tombs that the clothing could be restored were the tombs of Bae Cheon-jo(10th generation) and the tomb of Mrs. Nam of Go-seong, the wife of Bae Sang-gyeong(1lth generation). For identifying the features and methods of sewing used for the clothing of man and woman around Po(coat in Korea in the past) in the 16th to 17th century, this study investigated 12 items from Bae Cheon-jo's tomb(Sibok, Dopo(robe), Jungchimak(outer coat with large sleeves) and Gwa-du and 5 items(Jangok(lady's cloak) and Jungchimak) from Mrs. Nam's tomb of Go-seong. For sewing, broad-stitching, hemming and even-back-stitching were used the most in that order. Furthermore, various kinds of sophisticated stitching including old flat felled seam, decorative saddle stitching and buttonhole stitch, clothing made roughly as a shroud and fabric attached on the clothing were also observed. We may not have many opportunities to understand the change of clothing in Korea from mid 16th century to mid 17th century through the clothing of father-in-law and daughter-in-law in a family. As a result, we will be able to understand the features of sewing in a family and from the 16th century to the 17th century.

• Journal of Fashion Business
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• v.2 no.4
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• pp.102-111
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• 1998

The purpose of this study is to present the basic material for the competitive, high-quality products by analyzing employees' attitude toward their job and some factors which influence the enhancement of productivity, education of workers, and facilities. This project was mainly conducted the conditions of women's wear manufacturing industries in Taegu by interviewing 143 employees in the sewing department. The result of this dissertation can be summarized as follows; 1. When it comes to the division of task in the sewing department, one team is composed of chairpersons (33.5%), assistant members (27.4%) and sub-assistant members (26.6%). The inspection of commodities as well as the enhancement of work on ironing for elaboration was divided as completion (12.6%) and finally the forms of task were made up of design sampling team (49%) and contracting team (51%). 2. Among the needle workers, as many as 60% employees had received technical education, which was by means of being passed down from the predecessors (81.6%). In terms of the period of education, from 2 to 5 years topped the list. The contents of education comprise patterning, sewing (65.2%) and ironing (20.3%). 3. The department of design takes charge of the report on working directions up to 88.2% and the working directions were used by 69.9 % of technicians. The directors of working conditions and methods were chiefs of designing department (37.7%) and those of sewing department (30.8%). The factors of defective goods were low-quality materials (50.0%), the deficiency in skills of workers. In terms of methods for preventing defects, technical education of workers, standardization of task and investment for factory automation were suggested. 4. As for their perception of present work, most of employees (80%) look upon it as a way of earning a living and 11% of them wanted to derive many things from their work. 59.2% of workers were satisfied with the product. When it comes to the incentive system provided by company, 67.0% responsed that it was not bad, and 23.9% evaluated it as 'satisfactory'.

• Journal of Korean Home Economics Education Association
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• v.16 no.1
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• pp.19-30
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• 2004

Korean traditional paper is more than paper itself to the Korean people because of its excellence, compared to western paper, in keeping records, flexibility, strength. air permeability. and blocking ultraviolet rays. It has been used for various purposes such as book-making. covering for walls. windows or floors. making clothes and living appliances. and so on. Notwithstanding these merits. mass-produced paper has been substituted for Korean paper. Recently, however, there is a growing tendency to re-evaluate Korean paper because of its physiochemical properties. traditional beauty. eco-friendliness. and applicability to crafts. Korean paper deserves widely received re-evaluation as teaching materials for the education of ecology. creativity. and traditional arts. The purpose of this study was to find out a way of using Korean paper as sewing materials in Practical Arts classes for the elementary school. Previous researches on what properties Korean paper has and how many kinds of crafts have been made of Korean paper were reviewed. Concrete methods of utilizing Korean paper as sewing materials. especially for the finishing skills of sewing. were also proposed.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.1
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• pp.188-196
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• 2007

In this paper we propose an efficient offset curve generation algorithm for open and closed 2D point sequence curve(PS curve) with line segments in the plane. One of the most difficult problems of offset generation is the loop intersection problem caused by the interference of offset curve segments. We propose an algorithm which removes global as well as local intersection loop without making an intermediate offset curve by forward tracing of tangential circle. Experiment in computer sewing machine shows that proposed method is very useful and simple.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1996.04a
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• pp.803-807
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• 1996

In this paper, we perform a mechanism anlysis and optyimal designof the feeding system in a industrial sewing machine. Sewing machines are classified by the transfer mechanism as (1) transferred by feed dog only (2) transferred by feed dog and needle (3) transferred by feed dog, needle and pressure bar. We took the dewing machine classified as (2) which is more efficient in transferring the clothes than the machine classified as (1). In analyzing the mechanism, we divide the feeding mechanism as feed dog mechanism and needle bar mechanism. The two mechanisms are connected with each other kinematically because the clothes are transferred by needle and feed dog simultaneously and stitched by needle which pass through the feed dog in every stitchcycle. We define good stitch as coincidence of stitch between the forward and reverse motion of feeding. And we optimize feeding mechanism for that purpose. It is illustrated that stitching performance of the optimized mechanism is compared to original feeding mechanism.