• Journal of the Korean Society for Precision Engineering
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• v.20 no.3
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• pp.210-220
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• 2003

This work presents a method of point to surface assignment fur 3D metrology of solder pastes on PCB. A bounding box enclosing the solder paste tightly on all sides is introduced to avoid incorrect assignment. The shape of bounding box fur solder paste brick is variable according to geometry of measured points. The surface geometry of bounding box is obtained by using five peaks selected in the histogram of normalized gradient vectors. By using the bounding box enclosing the solder pastes, the task of point-to-surface assignment has been successfully conducted, then geometrical features are obtained through the task of surface fitting.

• Journal of Korean Academy of Nursing Administration
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• v.6 no.1
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• pp.5-18
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• 2000

This study was conducted to analyze the degree of department satisfaction and correlation accordng to nurses's clinical characteristics. Data fors tudy were selected August, 1999. The sample coisted of 512 nurses working in K university hosptal in Seoul. The collected materials have been alyzed by percentage, average, t-test, ANOVA, arson Correlation Coefficiency using SPSS window 8.0 program. The result were as the follows ; 1. Fifty-one percent answered to be satisfactory in current department of work, and nurses who had been experienced the transfer are fifty percent, and nurse specialist is eight point two percent. 2. The order of the degree of department duty satisfaction was mutual action, professinal position, autonomy, assignment desire, relation between the doctor and nurses, wage, administration. 3. The result of the degree of department duty satisfaction according to the age has shown significant differences in administration and assignment desire, and the result of the degree of department duty satisfaction according to the education and religion has shown significant differences in administration, and the result of the degree of department duty satisfaction according to marital status has shown significant differences in wage and administration. 4. The result of the degree of department duty satisfaction according La the position has shown significant differences in administration, assignment desire and the sum of duty satisfaction, and the result of the degree of department duty satisfaction according to the nurse specialist has shown no significant differences in total areas, and the result of the degree of department duty satisfaction according to the transfer has shown significant differences in relation between the doctor and nurses, administration, autonomy and the sum of duty satisfaction. 5. The result of the degree of department duty satisfaction according to the nursing career and present assignment career has shown no significant differences in total areas, and the result of degree of department duty satisfaction according to the present assignment has shown significant differences in relation between doctor and nurses, administration, assignment desire and the sum of duty satisfaction. 6. The result of the degree of department duty satisfaction according to the request and experiences of trasfer has shown significant differences in wage, administration, assignment desire and the sum of duty satisfaction 7. The result of the degree of department duty satisfaction according to the degree of satisfaction of present assignment has shown no significant difference in professional position 8. The result of relation of nurses'a clinical characteristics and the degree of department duty satisfaction and the sum of duty satisfaction has shown no significant differences in age, present assignment career, but the result of nursing career has shown significant differences in relation between doctor and nurse, administration, autonomy, assignment desire and the sum of duty satisfaction. and the satisfaction of present assignment which was very effective on duty satisfaction was as significant correlation with wage, professinal position, relation between doctor and nurses, administration, autonomy assignment desire, mutual action and the sum of duty satisfaction. The above result show us that the degree of wage is effected on marital status, experience of transfer, degree of satisfaction of present assignment, request of transfef and the relation between doctor and nurses is effected on experience of transfer, present assignment, degree of satisfaction of present assignment and the administration is effected on age, education, marital status position, experiences of transfer, request of transfer, degree of satisfaction of present assignment and the autonomy is effected on experience of transfer, degree of satisfaction of present assignment and the assignment desire is effected on position, pre sent assignment, degree of satisfaction of present assignment, request of transfer and the mutual action is effected on present assignment. and the sum of duty satisfaction is effected on marital status, position, experience of transfer, request of transfer, present assignment, degree of satisfaction of present assignment.

• The Journal of the Korea Contents Association
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• v.14 no.8
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• pp.365-373
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• 2014

The assignment of exploration on individuals provides challenging work environments, while it generates high levels of complexity. On the other hand, the assignment of exploitation on individuals offers less challenging work environments, while it makes low levels of complexity. Give the characteristics of exploration and exploitation, I argue that the assignments of both exploration and exploitation create the favorable work environments to individuals. Developed hypotheses were tested using a logit regression from a sample of 168 project managers in a R&D center. I found that a manager who experienced exploitation project(s) is positively related to higher performance in exploitation project(s). In addition, a manager who experienced both exploitation and exploration projects are found to be positively associated with higher project performance.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.12B
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• pp.1514-1523
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• 2009

It is well known that the current wireless sensor networks addressing methods do not work efficiently in networks more than a few hundred nodes. A standard protocol in ZigBee-Standard feature in ZigBee 2007 gives balanced tree based address assignment method with distributed manner. However, it was limited to cover less than hundreds of sensor nodes due to the wasteful use of available address space, because composed sensor networks usually make an unbalanced tree topology in the real deployment. In this paper, we proposed the hierarchical cluster tree based address assignment method to support large and scalable networks. This method provides unique address for each node with distributed manner and supports hierarchical cluster tree on-demand. Simulation results show that the proposed method reduces orphan nodes due to the address exhaustion and supports larger network with limited address space compared with the ZigBee distributed address assignment method defined in ZigBee-Standard feature in ZigBee 2007.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10a
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• pp.215-218
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• 1996

In work scheduling problems, scheduling constraints are not absolutely rigid; they may be changed depending on the scheduling aspect effected. In order to cope with changes in scheduling constraints and assignment strategies and to optimize scheduling results quickly, this paper will propose a new scheduling method which combines knowledge engineering and mathematical programming techniques.

• Proceedings of the Korea Society for Simulation Conference
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• 1998.10a
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• pp.142-146
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• 1998

In this paper, we suggests a WIP(work in process) of FMS analysis methods based on the Genetic algorithm. We conjoined both the assignment and the scheduling problem in order to create a new representation scheme for a chromosome and a mutation operators.

• Fashion & Textile Research Journal
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• v.14 no.4
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• pp.597-606
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• 2012

To increase the productivity and product quality of customized baseball jerseys, this study developed a multi-variable system for a production process that efficiently controls diverse production management factors. The working time was measured through the establishment of a standard process where skilled workers and Chinese factory workers manufactured 5 sets of the same basic design jerseys. Based on the measured working time (1,136 seconds/per unit), the multi-variable process control system was developed, where hourly production management is possible according to the involved workers and equipment types. Each process was assigned accoding to the production management factors for a total of 28 standard processes. The processes were developed based on consideration of work characteristics according to the order of needlework of open-type set baseball jerseys with sleeves(the basic design of baseball jerseys)to result in a customized production system structure that could be set up with multi-variables. As a result, a total 12 types of systems were developed in consideration of the personnel involved and the number of equipments. The optimal production management system (with the highest efficiency compared to the number of workers)was A-2, B-1, C-1. D-2, E-2, F-1, and G-1. This system had extremely high efficiency and showed 99% assignment efficiency for the 7-person team. Though not optimal, possible process assignment for each working personnel is proposed as a reserve process in case work modification is inevitable due to malfunctions and the absence of equipments.

• Journal of the Korean Society of Safety
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• v.30 no.5
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• pp.59-66
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• 2015

This study investigated the recognition difference among construction work participants for the assignment of the safety and health management responsibility to a client by survey. Recently, there were some studies for the client's responsibility and duty and they suggested the client-initiative safety and health management system in order to prevent construction accidents. To supplement the existed studies, this study surveyed various construction participants such as clients, safety managers, construction managers, supervisors, others. The clients and construction managers considered the contractor as most important person to prevent construction accidents, but the safety managers and supervisors considered the client. For the opinion that the assignment of the safety and health management duty to a client is helpful, safety managers were agreed with the most. However, the clients showed the lowest agreement. The reasons that the negative opinion for the assignment of client's the safety and health management were different between clients and other construction parties. Since, clients showed large difference to other construction participants for the recognition of works' safety and health, the education about the works' safety and health management should be continuously performed for clients to have correct recognition for works' safety and health.

• Korean Journal of Computational Design and Engineering
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• v.18 no.3
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• pp.224-233
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• 2013

For the scheduling and the job assignment of the ship hull production design which is a process-based work, we suggest the simulation-based scheduling using the discrete-event-based business process simulation. First, we analyze the ship hull production design process from the perspective of a job assignment to make it into the simulation model using DEVS (Discrete Event System Specification) which is the representative modeling method for a discrete-event simulation. Based on the APIs of the open-source discrete-event simulation engine, we implement the simulation using the Groovy script. We develop the scenario generator in which the user defines detail information of the construction drawing and its member blocks, and design engineers information, and the various setting for the simulation including the job assignment strategy. We use the XML files from this scenario generator as inputs of simulation so that we can get simulation result in forms of Gantt chart without changes of the simulation model.

• Smart Structures and Systems
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• v.8 no.2
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• pp.205-217
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• 2011

This article describes the research work involving the implementation of an Active Bracing System aimed at the modification of the initial dynamics of a laboratorial building structure to a new desired dynamics. By means of an adequate control force it is possible to assign an entirely new dynamics to a system by moving its natural frequencies and damping ratios to different values with the purpose of achieving a better overall structural response to external loads. In Civil Engineering applications, the most common procedures for controlling vibrations in structures include changing natural frequencies in order to avoid resonance phenomena and increasing the damping ratios of the critical vibration modes. In this study, the actual implementation of an active system is demonstrated, which is able to perform such modifications in a wide frequency range; to this end, a plane frame physical model with 4 degrees-of-freedom is used. The Active Bracing System developed is actuated by a linear motor controlled by an algorithm based on pole assignment strategy. The efficiency of this control system is verified experimentally by analyzing the control effect obtained with the modification of the initial dynamic parameters of the plane frame and observing the subsequent structural response.