• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제12권11호
• /
• pp.5252-5268
• /
• 2018

To support a large-scale Hadoop cluster, Hadoop heartbeat messages are designed to deliver the significant messages, including task scheduling and completion messages, via piggybacking to reduce the number of messages received by the NameNode. Although Hadoop is designed and optimized for high-throughput computing via batch processing, the real-time processing of large amounts of data in Hadoop is increasingly important. This paper evaluates Hadoop's performance and costs when the heartbeat period is controlled to support latency sensitive applications. Through an empirical study based on Hadoop 2.0 (YARN) architecture, we improve Hadoop's I/O performance as well as application performance by up to 13 percent compared to the default configuration. We offer a guideline that predicts the performance, costs and limitations of the total system by controlling the heartbeat period using simple equations. We show that Hive performance can be improved by tuning Hadoop's heartbeat periods through extensive experiments.

• 분석과 대안
• /
• 제4권1호
• /
• pp.89-103
• /
• 2020

The "rule of law" decision of the Fourth Plenary Session of the 18th Central Committee of the Communist Party of China proposes to build a strict supervision system of the rule of law. The reform of the national supervision system launched in 2016 can be described as an important measure to build such a system. The supervision and supervision system has gradually become the core system of the rule of law supervision system. Its full coverage of supervision of public officials is conducive to preventing corruption of public power and achieving the ultimate goal of supervision by the rule of law. The supervision mechanism in the supervision system under the rule of law requires systemic thinking to realize the effective supervision of public officials of the state power organs, as well as the constraints and supervision of other supervision systems, including the supervision of the People's Congress; Supervision is a full-coverage supervision, and other rules of law supervision systems are also full-coverage supervision systems within their scope of competence. Therefore, gradually exploring and constructing an external supervision system for supervision will be conducive to the optimization and eventual completion of the rule of law supervision system.

• 대한치과의료관리학회지
• /
• 제10권1호
• /
• pp.1-8
• /
• 2022

This study introduces research on the quality of medical services, optimization of medical services, dental medical services, implant medical services, and time schedules, as well as the effective process of dental implant medical services, which is expensive and requires a long treatment period. For improvement, it is suggested to evaluate using a time schedule. In this method, a time schedule is prepared in which each step, starting from the patients appointment until the completion of the treatment process, is allotted a certain time. This schedule was finalized in consultation with the employees. When performing all implant operations, the starting time of each item was checked to evaluate the degree of compliance and to understand any reasons for delay in each step. After identifying the causes for delay at each step, suitable steps to rectify the drawbacks were developed, and an optimal plan for patient management was determined. Changes in waiting time and human resource utilization were shown as concrete data, suggesting that such a schedule is meaningful as a decision-making support tool.

• Journal of Information Processing Systems
• /
• 제18권4호
• /
• pp.562-574
• /
• 2022

As traditional ways of evaluation prove to be ineffective in evaluating the effect of interactive multimedia physical education (PE) teaching, this study develops a new evaluation model based on the simulated annealing algorithm. After the evaluation subjects and the principle of the evaluation system are determined, different subjects are well chosen to constitute the evaluation system and given the weight. The backpropagation neural network has been improved through the simulated annealing algorithm, whose improvement indicates the completion of the evaluation model. Simulation results show that the evaluation model is highly efficient. Compared with traditional evaluation models, the proposed one enhances students' performance in PE classes by 50%.

• International Journal of Computer Science & Network Security
• /
• 제24권3호
• /
• pp.29-37
• /
• 2024

Resorting to electronic arbitration to resolve disputes in international trade contracts is the most important reflection of technological progress on the reality of international commercial arbitration. Electronic is a modern image of traditional arbitration, and this type of arbitration provides many advantages that are not provided by any legal system for resolving disputes, including speed, effectiveness and lower costs. What will this development produce? Through technical progress in the means of communication, it has become conceivable that international trade dealers agree to arbitration via electronic means of communication, followed by the completion of the arbitration process via the Internet, leading to the issuance of the electronic arbitration award in an electronic manner as well.

• Radiation Oncology Journal
• /
• 제31권2호
• /
• pp.66-71
• /
• 2013

Purpose: We evaluated the effectiveness and safety of ipsilateral radiotherapy for the patient with well lateralized tonsil cancer: not cross midline and <1 cm of tumor invasion into the soft palate or base of tongue. Materials and Methods: From 2003 to 2011, twenty patients with well lateralized tonsil cancer underwent ipsilateral radiotherapy. Nineteen patients had T1-T2 tumors, and one patient had T3 tumor; twelve patients had N0-N2a disease and eight patients had N2b disease. Primary surgery followed by radiotherapy was performed in fourteen patients: four of these patients received chemotherapy. Four patients underwent induction chemotherapy followed by concurrent chemoradiotherapy (CCRT). The remaining two patients received induction chemotherapy followed by radiotherapy and definitive CCRT, respectively. No patient underwent radiotherapy alone. We analyzed the pattern of failure and complications. Results: The median follow-up time was 64 months (range, 11 to 106 months) for surviving patients. One patient had local failure at tumor bed. There was no regional failure in contralateral neck, even in N2b disease. At five-year, local progression-free survival, distant metastasis-free survival, and progression-free survival rates were 95%, 100%, and 95%, respectively. One patient with treatment failure died, and the five-year overall survival rate was 95%. Radiation Therapy Oncology Group grade 2 xerostomia was found in one patient at least 6 months after the completion of radiotherapy. Conclusion: Ipsilateral radiotherapy is a reasonable treatment option for well lateralized tonsil cancer. Low rate of chronic xerostomia can be expected by sparing contralateral major salivary glands.

• 자원환경지질
• /
• 제55권4호
• /
• pp.407-419
• /
• 2022

메탄(CH₄)이 유출되는 관정 주변에서 토양(비포화대) 가스 모니터링과 자료 해석 방법을 제시하고자 토양 가스의 성분변화를 약 3일간 측정하였다. 이를 위해서 포항 지역의 시험 관정 2개(TB2, TB3)의 주변 1 m 이내에서 방사상으로 토양 가스를 채취하고 현장에서 CO₂, CH₄, N₂, O₂의 농도를 분석하였다. TB2의 관정 정두(wellhead)에서 30 cm 떨어진 지점에서 CO₂ 플럭스도 측정하였다. 아울러 TB2 관정 정두의 가스 시료와 대기 시료도 채취하여 분석하였다. 모니터링 마지막 날 채취한 시료는 실험실에서 CO₂의 탄소동위원소(δ¹³C_CO2)를 분석하였다. 서로 12.7 m 떨어져 있는 두 시험 관정 중 TB3는 시멘팅이 되어 있고, TB2는 시멘팅이 되어 있지 않았다. 생지구화학 반응 기반(process-based) 해석을 적용한 결과, 비포화대 가스의 CO₂, O₂, N₂ 농도와 N₂/O₂ 의 변화는 모두 CH₄의 산화를 지시하는 선과 가스의 용해에 의한 농도의 변화를 지시하는 선 사이에 위치하고 있었다. 또한 TB2 정두에서 측정된 CH₄은 대기의 CH₄에 비해서 5.2배 높은 값을 나타나고 있었다. 시멘팅이 되어 있지 않은 관정(TB2) 주변 비포화대에서 나타난 높은 CO₂ 농도(평균 1.148%)는 CH₄의 산화에 의해 증가한 것으로 판단된다. 반면, 시멘팅이 된 관정(TB3) 주변의 비포화대 CO₂는 상대적으로 낮은 농도(0.136%)를 나타내고 있었다. 따라서 CH₄가 산출되는 관정의 주변 토양가스(CO₂ 포함)는 관정의 완결 상태(시멘팅)에 크게 영향을 받는 것으로 판단된다. 본 연구는 천연가스 개발 관정 주변 토양의 환경 모니터링을 위한 전략 수립에 활용될 수 있으며, CO₂ 지중저장을 위한 주입정 및 관측정 주변 누출 감시에 활용될 수 있다. 또한 본 연구의 방법은 천연가스 저장소, 유류 오염 토양의 모니터링에 활용 가치가 있다.

• 대한공업교육학회지
• /
• 제39권1호
• /
• pp.164-188
• /
• 2014

이 연구의 목적은 사범대학 및 학과별 수준의 인증 시스템에서 제시한 인증 영역 및 요소에 대한 사범대학 재학생이 인식하는 중요도를 조사하여 개선방안을 제시하는 것이다. 이를 위한 구체적인 목표는 첫째, 인증 영역 및 요소에 대한 학과별 중요도 차이를 확인하며, 둘째, 인증 영역 및 요소에 대한 학년별 중요도 차이를 확인하는 것이다. 본 연구의 대상은 A대학교 사범대학 재학생 전체를 모집단으로 하였으며, 10개 학과 758명이 중요도에 대한 설문 조사 대상이다. 설문 조사지는 총 800부를 배포하였으며, 회수된 설문지는 299부로 회수율은 37.3%로 나타났다. 설문 조사 분석 결과를 바탕으로 주요 결론을 제시하면 다음과 같다. 첫째, 학과별로 교직 인성 영역에서는 교직 적성 검사, 사회적 지능계발 프로그램 이수에 대한 중요도의 차이가 나타났으며, 교수 전문성 영역에서는 전공별 교과교육 과목 이수, 전공별 교과내용 과목 이수, 수업 실연 경진대회 참가에서 중요도 인식의 차이가 나타났다. 학생지도 전문성 영역에서는 창의 인성 계발 관련 교육 프로그램 이수, '교육실습'과목 이수에 있어서 학과별로 중요도에 차이가 나타났다. 정보 사회 소통력에서는 제2외국어 최소 점수 획득에 대해서 낮은 중요도를 보였다. 둘째, 학년별로는 1학년 재학생이 교직과정 구성의 타당성, 교육과정의 충실성, 교육과정의 우수 교원 양성에의 타당성, 졸업자의 교원 직무 수행 능력 함양, 사범대학 교육과정의 우수 교원 양성 적절성에 대해서 타 학년에 비해 높게 인식하는 것으로 나타났다. 특히 4학년의 경우 우수 교원 양성을 위한 새로운 제도의 필요성을 가장 높게 인식하는 것으로 나타났다.

• The Plant Pathology Journal
• /
• 제18권4호
• /
• pp.187-191
• /
• 2002

This paper describes the cloning and sequence analysis of the 5'-terminal region and full-length cDNA production of genomic RNA of Lily symptomless virus (LSV), a Species Of the genus Carlavirus. A sing1e DNA band about 600 bp harboring the 5'-end of genomic RNA of the virus was successfully amplified by reverse transcription-polymerase chain reaction (RT-PCR) and rapid amplification of cDNA ends (RACE), and was cloned for nucleotide sequence determination. Sequence analysis of selected RACE cDNA clones revealed that the LSV 5'non-translated region consists of 67 nucleotides long of AT rich stretch followed GC rich from the 5'-end. To produce full-length cDNA products for the viral genomic RNA, a set of LSV-specific primers could be designed based on the obtained sequence in this study and the known sequences of 3'-terminal region for the virus. Full-length cDNA copies of LSV, an 8.4 kb long, were directly amplified by the long-template RT-PCR technique from the purified viral genomic RNA samples. This full-length cDNA copies were analyzed by restriction mapping. The molecules produced in this study can be useful for the production of in vitro infectious cDNA clone, as well as, for the completion of genomic RNA sequence and genome structure for the virus.

• International Journal of Contents
• /
• 제7권4호
• /
• pp.64-69
• /
• 2011

Recently, as smart devices are distributed more and more, the need for education of developing contents based on smart media increases. In order to develop contents based on smart media, it is necessary to learn new programming language as well as to understand the structure of platforms as device-manufacturers and communication companies have different platforms. Generally, the problem in education of programming is that it can provide learning to understand the language stage by stage, but it is difficult to suggest a clear result such as completion of learner's project from macroscopic and integrated approach. Especially, there is a difficult of learning several programming languages due to the characteristics of platforms in developing smart contents. Accordingly, in the education of programming for developing smart contents, it is not appropriate to use the traditional teaching method of programming which conducts projects from an integrated point of view after learning the grammatical elements of the language. This paper aims to suggest the top-down teaching method as an effective teaching method for developing contents based on smart media, and to analyze the effect after developing and applying the suggested teaching model.