• Nuclear Engineering and Technology
• /
• v.50 no.7
• /
• pp.1173-1183
• /
• 2018

Transient fluid velocity and pressure fields in a pressurized water reactor (PWR) steam generator (SG) secondary side during the blowdown period of a feedwater line break (FWLB) accident were numerically simulated employing the saturated water flashing model. This model is based on the assumption that compressed water in the SG is saturated at the beginning and decompresses into the two-phase region where saturated vapor forms, creating a mixture of steam bubbles in water by bulk boiling. The numerical calculations were performed for two cases of which the outflow boundary conditions are different from each other; one is specified as the direct blowdown discharge to the atmosphere and the other is specified as the blowdown discharge to an extended calculation domain with atmospheric pressure on its boundary. The present simulation results obtained using the two different outflow boundary conditions were discussed through a comparison with the predictions using a simple non-flashing model neglecting the effects of phase change. In addition, the applicability of each of the non-flashing water discharge and saturated water flashing models for the confirmatory assessments of new SG designs was examined.

• International Journal of Computer Science & Network Security
• /
• v.21 no.8
• /
• pp.182-186
• /
• 2021

The market for smart phones has been booming in the past few years. There are now over 400,000 applications on the Android market. Over 10 billion Android applications have been downloaded from the Android market. Due to the Android popularity, there are now a large number of malicious vendors targeting the platform. Many honest end users are being successfully hacked on a regular basis. In this work, a cloud based reputation security model has been proposed as a solution which greatly mitigates the malicious attacks targeting the Android market. Our security solution takes advantage of the fact that each application in the android platform is assigned a unique user id (UID). Our solution stores the reputation of Android applications in an anti-malware providers' cloud (AM Cloud). The experimental results witness that the proposed model could well identify the reputation index of a given application and hence its potential of being risky or not.

• The Journal of Asian Finance, Economics and Business
• /
• v.8 no.5
• /
• pp.365-374
• /
• 2021

Environmental concern has become the focus of various studies, academic research, company policies, and government policies. A business sector, which has seen a high level of urgency in environmental empowerment are small- and medium-sized enterprises (SMEs). These are an economic sector, which is imbedded in society and has become one of the largest economic sectors in Indonesia. Therefore, this study analyzes the relationship between green human resource management (GHRM), workplace green behavior (WGB) and green innovation (GI), and increasing firm performance (FP). This study is using quantitative research methods. The data is obtained through distributing questionnaires to 180 culinary SMEs employees from cafes and modern food restaurant in the Special Region of Yogyakarta (DIY), Indonesia. The data is then analyzed using Structural Equation Modeling (SEM) with Smart-PLS. The results of this study show that GHRM has significant positive effect on workplace green behavior and firm performance, while workplace green behavior also has significant positive effect on green innovation and firm performance. In addition, green innovation has significant positive effect on firm performance. This study contributes to provide and extends the literature related to building green SMEs, which is empirically demonstrated to be able to improve company performance.

• The Journal of Asian Finance, Economics and Business
• /
• v.8 no.5
• /
• pp.1129-1138
• /
• 2021

SMEs are constantly demanded of changes in the rapidly-evolving business environment, which involves the fourth industrial revolution and the COVID-19 pandemic. In this period, management consulting service becomes more in demand to provide technical and strategic solutions for management problems. This study aimed to empirically analyze the direct effects of emotional intelligence on job satisfaction and the indirect effects of such parameters as learning agility and self-efficacy on job satisfaction in management consultants. On the basis of a literature review, inter-variable association was designed in the research model. Based on an online survey of those in the Korean SME management consultants, this study collected 221 questionnaires then used structural equation modeling for statistical analysis. The results reveal that emotional intelligence significantly affected job satisfaction and, also significantly positively affected learning agility and self-efficacy. In addition, a significant indirect correlation could be found between learning agility and self-efficacy. Meanwhile, if learning agility and self-efficacy mediated job satisfaction, emotional intelligence had no significant effect on job satisfaction and fully mediated learning agility and self-efficacy. It is necessary to develop an emotional intelligence education program that can help management consultants improve their emotional intelligence with the objective of giving successful management consulting services.

• The Journal of Asian Finance, Economics and Business
• /
• v.8 no.2
• /
• pp.1247-1262
• /
• 2021

The number of tax consultants in Central Java registered at the Indonesian Tax Consultant Association is still limited, likewise, the number of accountants with licensing practices is still small, and making the career opportunities of tax consultants and auditors remain open. This study aims to provide a perspective for career interests in taxation and auditing for accounting students. This study used a quantitative approach by distributing questionnaires to the respondents. The research population involved accounting students who had taken audit and tax courses. The sampling method employed purposive sampling. 270 accounting students at state and private universities in Semarang-Indonesia were chosen. The analysis technique used Warp Partial Least Square (PLS). The results revealed that labor market motivation and considerations positively affected career interests in the taxation and audit fields. Self-efficacy also had a positive effect on career interests in the audit field but not on tax career interests. Besides, gender influenced career interests in auditing. In contrast to the expectation, this study found that gender did not influence career interests in tax. In conclusion, this study can provide information in explaining career interests in the taxation and audit fields, although the ability to explain is still limited.

• Journal of Ecology and Environment
• /
• v.45 no.1
• /
• pp.10-16
• /
• 2021

Background: Ranavirus is an emerging infectious disease which has been linked to mass mortality events in various amphibian species. In this study, we document the first mass mortality event of an adult population of Dybowski's brown frogs (Rana dybowskii), in 2017, within a mountain valley in South Korea. Results: We confirmed the presence of ranavirus from all collected frogs (n = 22) via PCR and obtained the 500 bp major capsid protein (MCP) sequence from 13 individuals. The identified MCP sequence highly resembled Frog virus 3 (FV3) and was the same haplotype of a previously identified viral sequence collected from Huanren brown frog (R. huanrenensis) tadpoles in South Korea. Human habitat alteration, by recent erosion control works, may be partially responsible for this mass mortality event. Conclusion: We document the first mass mortality event in a wild Korean population of R. dybowskii. We also suggest, to determine if ranavirus infection is a threat to amphibians, government officials and researchers should develop continuous, country-wide, ranavirus monitoring programs of Korean amphibian populations.

• Journal of Soil and Groundwater Environment
• /
• v.26 no.4
• /
• pp.20-26
• /
• 2021

In this work, an indigenous microbial consortium was obtained by selectively cultivating microbes using a long-aged petroleum-contaminated soil (Kuwait) containing recalcitrant petroleum hydrocarbons. The obtained microbial consortium was able to grow on and degrade the remaining petroleum hydrocarbons which could not have been utilized by the indigenous microbes in the original Kuwait soil. The following microbial community analysis using 16S rRNA gene sequencing suggested that the enhanced degradation of the remaining recalcitrant petroleum hydrocarbons by the novel microbial consortium may have been attributed to the selected bacterial populations belonging to Bacillus, Burkholderia, Sphingobacterium, Lachnospiraceae, Prevotella, Haemophilus, Pseudomonas, and Neisseria.

• Journal of the Korean GEO-environmental Society
• /
• v.24 no.3
• /
• pp.15-21
• /
• 2023

Although standards related to falling stone facilities are established in Korea, the absorption energy of the rockfall prevention net is evaluated from the passage of rockfall and destruction of the rockfall prevention net on field test. The existing PVC coating net does not sufficiently suppress the rockfall load and tears frequently occur, and a high-strength wire rockfall net was developed to prevent. In this study, the performance was analyzed through field tests of the existing PVC coating net and the developed high-strength rockfall net (1,000 MPa, 2,000 MPa).

• Journal of the Korean Society for Aviation and Aeronautics
• /
• v.30 no.4
• /
• pp.33-44
• /
• 2022

As the majority of Korean MRO demand is outsourced overseas, AMO by major foreign authorities is required to promote the Korean MRO industry to keep Korean MRO demand on shore. This study aims to promote consulting for AMO (obtaining repair station certification) by U.S. Federal Aviation Administration (FAA) for Korean maintenance companies. We analyzed AMO process, studied various industry cases, developed a model for AMO consulting, and identified core competencies for consultants. We suggested a five-step modified Milan model to apply AMO consulting process. We identified seven core competencies (ethics, communications, problem-solving, technical, relationship, resource management, organizational understanding) both social and technical for consultants. Additionally, we text analyzed more than 260 FAA AMO consultant resumes on Linkedin and interpreted frequent words (airline, audit, inspector, DER, regulation, ISO, system) to their competencies. This study contributes to promote consulting for the Korean MRO industry to be recognized by FAA and to develop the Korean MRO industry.

• International conference on construction engineering and project management
• /
• 2007.03a
• /
• pp.160-168
• /
• 2007

Conflicts of interest and independent agenda of the parties brought together for implementation of a construction project often leads to dispute in Contract and claim situations. Construction Industry is notorious for claim that is managed on its arising and there lacks an endeavor to minimize the breeding grounds through efficient planning and alignment to purpose, of all contract-documents. There failure of a concerted effort entails wastage of resources, delayed completion of facilities and stained relationships of parties when collide in mistrust in contract to win over the other. There needs a focus on the claim breeding issue and establish an effective mechanism to deal with disputes in urgency. Claim occurs mostly during the construction phase. But the seeds of claim and nutrients essential for development are contained in the contract documentation and the information supplied or not in pre-contract phase. Opportunity to prevent nutrients for seed of Claim comes to an end once tender-documents are finalized, the contract is awarded and established or not a mechanism for dealing with claim situation. The processes presented here would help in minimizing the breeding grounds and emergence of disputes during progression of works and dealing with eventualities in forceful manners for finding a resolution most effectively in relevant time.