• Advances in environmental research
• /
• v.12 no.1
• /
• pp.51-64
• /
• 2023

The sustainable management of rice straw is essential for protection of human health and environment. This study assesses the impact of stock density of earthworm (Eisenia fetida) and Neem leaves (Azadirachta indica) on the quality of the final vermicompost. The vermicompost is produced using different combinations of rice straw, Neem leaves, and cow dung (bulking agent) by varying stock density of earthworms. The vermicomposting experiments are performed in plastic containers (32 cm × 28 cm × 28 cm) in open for 90 days under laboratory conditions. The stock density of the earthworm is found to be an important factor to influence nutritional quality of the final vermicompost. There is observed significant improvement in the total nitrogen (91.8%), phosphate (73.4%), potassium (38.8%), and calcium (59.05%) content of the vermicompost produced with the highest stock density of the earthworms. All the treatments showed decrease in TOC and C:N content after 90 days of vermicomposting. The treatment with Neem leaves showed maximum growth of earthworms (2.65 fold). Neem leaves brought positive changes in the quality of final vermicompost by enhancing the growth and reproduction of the earthworms. The calcium content increased by 39% in the final vermicompost with the addition of Neem leaves at the same stock density of the earthworms. The stock density of the earthworms and Neem leaves are found to significantly improve quality of the final vermicompost as compared with the compost (control). The surface morphology in SEM images showed high degree of fragmentation in the vermicompost as compared with the compost. The combined action of microbes and earthworms resulted in high degree of disintegration in the vermicompost.

• Journal of Cadastre & Land InformatiX
• /
• v.52 no.2
• /
• pp.81-102
• /
• 2022

This study reviewed the concept of land registration and analyzed the land registration system in UK, Australia, USA, the Netherlands, France and Sweden. Land registration is a process of registering physical information and rights related to land in the land register for protection and regulation of land rights, taxation and dispute resolution. The land registration systems in the six countries were mainly analyzed in terms of policy, land register, objects and systems. As a result, first, the establishment of the land registration master plan is of paramount importance for sustainable development of land registration systems. Second, land register needs to be improved for 4D land management and service. Third, reduction of period and improvement of work efficiency for the cadastral resurveying should be considered. Last, a plan to improve public services by linking the geospatial technology with the land registration system is need.

• Journal of Digital Convergence
• /
• v.20 no.3
• /
• pp.377-388
• /
• 2022

Various researches are actively studied to satisfy exponentially increasing the usage of the Internet as well as the diverse service demands. Especially the Optical Internet that delivers several Tbps through a single optical fiber requires the intelligence to satisfy the various types of survivability requirements. In the paper, a novel recovery scheme that satisfies the various restoration demands in IP over WDM networks is proposed. The scheme classifies the restoration services into three classes and applies dedicated protection and shared restoration scheme with different priorities for each class. Also, a configuration scheme for information database to support the scheme is proposed. This scheme satisfies the different degree of restoration demands in terms of restoration time, blocking rate and resource usage. With the scheme, medical data can be transmitted without loss.

• Journal of Digital Convergence
• /
• v.20 no.3
• /
• pp.93-103
• /
• 2022

This study aims to explore the digital citizenship education of pre-service teachers through deriving the needs for digital citizenship of pre-service teachers and analyzing their perceptions. To this end, an online survey was conducted on pre-service teachers enrolled in a graduate school of education, and data from 245 respondents were collected and analyzed. The needs assessment was prioritized by synthesizing paired t-test, Borich needs assessment, and the locus for focus model. The results of the study were as follows; first, when synthesizing the analysis of needs, the priority of digital citizenship of pre-service teachers was 'self-protection'. Second, pre-service teachers were aware of the need for digital citizenship education and were willing to participate in it. They hoped that it would be taught in an extra-curricular program or teacher education courses. Based on the study results, the direction of education to strengthen the digital citizenship of pre-service teachers was discussed.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.17 no.2
• /
• pp.375-386
• /
• 2022

As information asset protection is recognized as an important management factor for organizations, organizations are increasing their investments in information security(IS) policies and technologies. However, strict application of IS may cause non-compliance behavior through IS stress on employees of the organization. Accordingly, this study suggests a mechanism by which employee stress affects IS compliance intentions through self-determination, and a method to reinforce IS compliance intentions through person-organization fit. We conducted an online survey of employees working at companies that adopted IS policies and tested hypotheses using 475 samples. First, as a result of analyzing the main effects of applying the structural equation model, role stress affected IS compliance intention through self-determination. Second, as a result of analyzing the moderating effect of applying Process 3.1, personal organization fit strengthened the relationship between self-determination and IS compliance intention. The research suggests a direction for achieving internal IS goals by confirming the influence of IS stress and behavioral causes of employees.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2021.06a
• /
• pp.152-152
• /
• 2021

The importance of groundwater has long been recognized, but the ground water potential to become contaminated as a result of human activities has only been recognized in recently. Before 1980 it was thought that soils served as filters, preventing harmful substances deposited at the surface from migrating into groundwater. Today it is known that soils have a finite capacity to protect groundwater. It can be contaminated from divers sources. Therefore, Assessment of aquifer vulnerability to pollution is essential for the protection and management of groundwater and land use planning. In this study, we used DRASTIC and AVI for groundwater vulnerability to contamination assessment. the different methods were applied to the southern coastal sedimentary basin of Benin and DRASTIC method was modified in two different steps. First, we modified DRASTIC by adding land use parameter to include the actual pollution sources (DRASTIC_LcLu) and second, classic DRASTIC weights was modified using Shannon's entropy (Entropy weight DRASTIC). The reliability of the applied approaches was verified using nitrate (NO3^-) concentration and by comparing the overall vulnerability maps to the previous researches in the study area and in the world. The results from validation showed that the addition of landcover/land use parameter to the classic DRASTIC helps to improve the method for better definition of the vulnerable areas in the basin and also, the weight modification using entropy improved better the method because Entropy weight DRASTIC_LcLu showed the highest correlation with nitrate concentration in the study basin. In summary the weight modification using entropy approach reduced the uncertainty of the human subjectivity in assigning weights and ratings in the standard DRASTIC.

• Asia-Pacific Journal of Business
• /
• v.13 no.4
• /
• pp.151-161
• /
• 2022

Purpose - The purpose of this study is to redefine imperial cultural properties and pass on and provide the elegant value of imperial cultural properties with the Allen Collection's promotion to retrieve imperial cultural properties. Design/methodology/approach - This study was approached to deal with the essential interpretation of cultural improvement through discussion in the cultural science approach Findings - As a result of examining ways to revitalize tourism resources using Allen Collection, it is necessary to cultivate international manners and knowledge levels in strengthening imperial awareness through the establishment of imperial museums, enacting laws on standards for designation of imperial cultural assets, and promoting them. In addition, policy needs such as the development plan of the imperial cultural festival, re-establishment, application, reuse, re-establishment, and reproduction according to environmental changes, and technical support and monitoring systems for investigating and preserving imperial cultural assets are needed. Research implications or Originality - The study on the device imperial cultural assets as tour resources the cultural assets mate be not only preserved and inherited to the descendant but also useful in contemporary national emotion positively. for we could obtain wide national support and co-operation in the protection work of cultural assets. What makes our cultural assets leaved indifferent before destruction like this most of all, it is form indifference of the people, we must make an effort to meet with recognizing the value of useful cultural assets by mean of utilizing cultural assets as tour resources to inhibit more damage of destruction of cultural assets.

• Progress in Medical Physics
• /
• v.33 no.4
• /
• pp.164-171
• /
• 2022

The number of facilities using radiation generators increases and related regulations are strengthened, the establishment of a shielding management and evaluation technology has become important. The characteristics of the radiation generator used in previous report differ from those of currently available high-frequency radiation generators. This study aimed to manufacture lead, iron, and concrete shielding materials for the re-verification of half-value layers, tenth-value layers, and attenuation curve. For a comparison of attenuation ratio, iron, lead, and concrete shields were manufactured in this study. The initial dose was measured without shielding materials, and doses measured under different types and thicknesses of shielding material were compared with the initial dose to calculate the transmission rate on 50-300 kVp X-ray. All the three shielding materials showed a tendency to require greater shielding thickness for higher energy. The attenuation graph showed an exponential shape as the thickness decreased and a straight line as the thickness increased. The difference between the measurement results and the previous study, except in extrapolated parts, may be due to the differences in the radiation generation characteristics between the generators used in the two studies. The attenuated graph measured in this study better reflects the characteristics of current radiation generators, which would be more effective for shield designing.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.26 no.6D
• /
• pp.1011-1017
• /
• 2006

It is so sensitive that the wetland ecosystem very weak in artificial interference and environment change. wetlands are a transitional zone between aquatic and terrestrial ecosystems. This natural property is important to people and life. It is necessary to preservation and protection of the wetland with a countermeasure. we really need to Environment-GIS (E-GIS) and digital map which is included correct position, attribute data and range of the wetland. In this study, we take priority of making a database of wetland management. Moreover, we standardize a digital map production of wetland in our research and we improve accuracy of control survey using GPS surveying. The main purpose of this study is to suggest a pre-estimated wetland that have not yet been discovered. by analysing terrain, geological feature, a geographical distribution of plants and animals using GIS.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2022.05a
• /
• pp.510-511
• /
• 2022

물관리기본법의 시행 및 제1차 국가물관리기본계획의 이행에 따라 물관리 자료의 정보화 요구가 증가하고 있다. 과거 농업용수관리는 기초자료의 오류, 계측데이터의 부족 등이 한계점으로 지적되었으며, 과학화·표준화된 농업용수 물수급 분석 체계 구축 및 물정보의 정확성이 요구된다. 최근 통합물관리 국가정책 대응을 위한 물수급 분석 기반 마련을 목적으로 한국농어촌공사에서는 농업용수 용 배수 계통 정밀조사, 공간자료 재구축 등을 통한 농업용수 디지털 정보체계 구축 사업이 진행되고 있다. 연속수치지형도 및 토지피복, 스마트팜맵 등의 디지털 공간자료를 수집하고 현장조사와 영농조사를 바탕으로 최신화된 용배수계통도, 수혜면적 자료를 구축하였다. 본 연구에서는 디지털화한 용배수계통도를 이용하여 수리해석 모델 기초자료를 구축하고, 들녘단위 (주·보조수원, 저수지 및 양수장 등) 용수계통도 구현함으로써 수원공별 용수공급 네트워크를 분석하고자 한다. 농업용수 공급체계 반영이 가능한 EPA-SWMM (United States Environmental Protection Agency Storm Water Management Model)을 활용하여 다양한 물공급 시나리오를 적용하여 최적의 물관리 방안을 제시하고자 한다. 본 연구에서는 경기도 안성시 고삼저수지를 대상으로 연속수치지형도, 농경지전자지도, 고해상도 DEM 등을 활용한 디지털 조사와 수로 표고, 길이 및 너비 등 현장조사를 수행하였으며, 현장 물관리 방안을 적용하여 물분배 모의가 가능한 EPA-SWMM 기반 수원공-용수로-수혜구역을 연결하는 용수공급 네트워크를 구축하였다. 농촌용수종합정보시스템 (Rural Agricultural Water Resource Information System, RAWRIS)에서 제공하는 계측 자료를 활용하여 관개기간의 강수량, 소비수량, 증발산량, 공급량 등을 적용하여 농업용수 공급량, 배분량을 추정하였다. 본 연구의 결과는 물관리 담당자에게 상세한 현행 용수공급량 및 용수공급체계 정보 제공과 향후 국가물관리기본계획, 농어촌용수이용합리화계획의 물수급 분석 기초자료로 활용 가능할 것으로 사료된다.