• Journal of Information Management
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• v.43 no.4
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• pp.31-48
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• 2012

Social network analysis was performed on 545 job descriptions in 32 university libraries in Seoul, and drew the job distribution and their relations. Furthermore, for finding the differences according to scale of libraries, this study performed secondary analysis by dividing them two groups. Results show that large scale library show lower density and loose connectivity than small scale library. And while jobs of small scale library were clustered 3 groups, large scale university cluster 4 groups containing 1 technical job and 3 diverse user services. And the jobs that has high specificity, such as catalog or classification, shows high degree centrality in the case of small scale library. Whereas in large scale library they show lower degree centrality, so it can be said that these jobs were performed somewhat independently in large scale libraries.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.38 no.4
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• pp.64-71
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• 2015

In this paper, we present a multi-period 0-1 knapsack problem which has the cardinality constraints. Theoretically, the presented problem can be regarded as an extension of the multi-period 0-1 knapsack problem. In the multi-period 0-1 knapsack problem, there are n jobs to be performed during m periods. Each job has the execution time and its completion gives profit. All the n jobs are partitioned into m periods, and the jobs belong to i-th period may be performed not later than in the i-th period, i = 1, ${\cdots}$, m. The total production time for periods from 1 to i is given by $b_i$ for each i = 1, ${\cdots}$, m, and the objective is to maximize the total profit. In the extended problem, we can select a specified number of jobs from each of periods associated with the corresponding cardinality constraints. As the extended problem is NP-hard, the branch and bound method is preferable to solve it, and therefore it is important to have efficient procedures for solving its linear programming relaxed problem. So we intensively explore the LP relaxed problem and suggest a polynomial time algorithm. We first decompose the LP relaxed problem into m subproblems associated with each cardinality constraints. Then we identify some new properties based on the parametric analysis. Finally by exploiting the special structure of the LP relaxed problem, we develop an efficient algorithm for the LP relaxed problem. The developed algorithm has a worst case computational complexity of order max[$O(n^2logn)$, $O(mn^2)$] where m is the number of periods and n is the total number of jobs. We illustrate a numerical example.

• Journal of Digital Convergence
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• v.19 no.4
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• pp.167-176
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• 2021

This study aims to analyze economically active females' factors influencing problematic drinking, by their jobs. It examined the socio-demographic and health-related characteristics and problematic drinking status of economically active females over 19, by using data from the 6th Korea National Health and Nutrition Examination Survey. They were analyzed by using IBM SPSS 25.0 and the complex sampling design. The findings show that the problematic drinking rates of economically active females were varied by their jobs: 19.1% for office job; 24.8% for manufacturing job; 12.3% for service job. The factors influencing problematic drinking were also differed by jobs: subjective heath status for office job; marital status and smoking for service job; marital status for manufacturing job. They suggest that convergent drinking management programs customized to jobs should be developed by considering the characteristics of females' physical and emotional traits and their jobs, to reduce their problematic drinking rates.

• Journal of Korean Dental Hygiene Science
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• v.5 no.2
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• pp.85-96
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• 2022

Background: This study was aimed at determining the relationship of the Dominance, Influence, Steadiness, and Conscientiousness (DISC) personality type with the major satisfactions and job preferences of dental hygiene and technician students. Methods: We enrolled 264 dental hygiene and technician students from a junior college in Chungcheong-do. A questionnaire survey was conducted to determine the DISC behavior type, major satisfaction level, and job preference of the participants. Statistical analyses were performed with the independent-samples t-test, one-way analysis of variance, and multiple regression. Results: Dental technician students had higher major satisfaction (p< .001) and preferred jobs with potential for growth (p= .020) or matching their vocation and interests (p= .013) compared to dental hygiene students. Factors influencing major satisfaction were grade (β= .160, p= .008) and a social personality type (β= .146, p= .070). Factors influencing preference for jobs with high growth potential were the personality type (β= .236, p= .001), grades (β= .157, p= .002), and major satisfaction (β= .429, p< .001). The conscientiousness personality type was conducive to preferencefor jobs with high growth potential. The steadiness personality type was conducive to preference for jobs aligned with vocation and interest (β= .249, p= .004). The conscientiousness personality type (β= .137, p= .041) and high major satisfaction (β= .193, p= .003) were conducive to preference for jobs with a satisfactory working environment. Conclusion: The results of this study could serve as a basis for customized career counseling and education programs according to personality types.

• Journal of applied mathematics & informatics
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• v.17 no.1_2_3
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• pp.737-746
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• 2005

Average memory occupancy and congestion in computer system or communication system may be reduced further if new jobs are admitted only when the number of jobs queued at CPU is below a certain threshold, run queue cutoff (RQ). In our previous paper we showed that response time of a job is invariant with respect to RQ if jobs do not communicate each other. In this paper, we prove that the invariance property by considering the evolution of the queue lengths as point processes. We also present an approximate method for the delay due to context switching under time slicing.

• Journal of Korean Institute of Industrial Engineers
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• v.20 no.4
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• pp.37-50
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• 1994

The efficiency of production system is mainly considered in the viewpoints of reducing the average flow time of products and increasing the throughput rate. The performance in these viewpoints is very depending on job dispatching of each machine in real time operation, in the case jobs are released dynamically. In this research, a heuristic dynamic dispatching method is suggested for a flow shop case where new jobs with random process times are released by an interarrival time distribution and the number of waiting jobs between each pair of machines are limited. The proposed method has been compared with some priority rule-based dispatching methods by simulation and found to be superior to them.

• Journal of The Korean Association For Science Education
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• v.12 no.3
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• pp.119-128
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• 1992

The contents of two elementary science textbooks are analyzed; they are HBJ Science and Holt Science. A) The ratio of the contents is as follows physics area, 21-27% ; chemistry area, 6-7% ; biology area, 32-41% ; earth science area, '27-31 %. B) The jobs related in science and technology are introudced in both textbooks. The kinds of jobs found in Holt Science and HBJ Science are 94 and 55, respectively. C) There cent developments in science and technology are introduced in Holt Science and HBJ Science are 57 and 46 times respectively. The introductoin of the recent development of science & technology and the jobs relcated in science & technology may interest children in science.

• Journal of Families and Better Life
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• v.18 no.2
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• pp.15-27
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• 2000

This study puts an emphasis on the importance clothing and its reuse, dealing with the unmarried women workers who will be main domestic consumers. Questionnaire survey method was used in this research. The sample was taken from 546 unmarried women workers. The major findings are summarized as follows, it was found that Factor I was the cause of unplanned clothing management, Factor II was the cause of clothing modification and body type changes and Factors III was the cause of fashionmongering. Second, it was shown that as for experiences in hoarded clothing recycling disposition behavior subjective social strate had the high level, the group of sale and technical jobs / self-employed jobs had the higher level than the group of specialized skil / management jobs, the group in office-going and leaving clothing had the higher level than the group of people in separate uniform as working dress and the group of those experienced in environmental education had the high level.

• IE interfaces
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• v.10 no.2
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• pp.57-67
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• 1997

This paper is a report of a simulation study that investigates a dynamic approach to scheduling jobs in a conventional shop floor, especially in an assemoly-type welding process. We consider both JIT arrival and JIT delivery. Various dispatching rules are tested for the following performance measures; mean flow time, rate of tardy jobs, mean tardiness, sum of mean tardiness and mean earliness. The results indicate that SPT rule is the best for the mean flow time. MSLACK that we suggest in this paper, is the best for the mean tardiness and the sum of mean tardiness and mean earliness. However, it is not clear that which rule is the best for the rate of tardy jobs.

• Journal of the Korean Professional Engineers Association
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• v.30 no.6
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• pp.59-67
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• 1997

As Information society evolves, there is a growing need that substitutes agents for users to do the given Jobs in distributed computing environments. Agents can retrieve and browse the diverse information via Internet, as the users request, and can deal with the complicated routine jobs on behalf of users with timeliness and efficiency. Especially, mobile agent can support the paradigm for distributed application programs in Internet environments. This is suitable to jump-to-jump model without any hesitations because agent moves. Agents can be applied to various applications, but we restrict it to market information retrieval in this paper. On recognizing a query about merchandise information by an user, agent by itself retrieves the corresponding information by navigating the Internet and informs the result to the user. In this paper, we review the mobile agent configuration to do this kind of work, propose the system architecture based on this review. By using this system, users can be free from complicated routine jobs and pursue his/her wishes to promote ones welfare.