• Title/Summary/Keyword: Problem conduct

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Critical Overview on Changes of Judicial Precedents in the Medical Cases of Korea - In Relation with Forms of Judgments and Damages - (우리나라 의료판례 변화에 대한 비판적 고찰 - 판결양식과 손해배상액을 중심으로 -)

  • Shin, Hyun Ho
    • The Korean Society of Law and Medicine
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    • v.15 no.1
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    • pp.83-122
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    • 2014
  • Compared with medical cases and health care law from other countries there has been a lot of progress on medical law, especially on medical precedents in Korea. However, in recent years, medical precedents tend to reflect a realistic position of health care providers, rather than normative position of the victim. The burden of proof to prove strict liability is given to patients in civil law suits by courts, patients generally has the burden of proof. The rate of claims to prove the negligence of medical malpractice is falling significantly. Even if the error is acknowledged, it is not enough to get right to be relief for patients by increasing limitations of liability or ratio of patient's own negligence. Compensation fee is included in medical fees and risk of medical malpractice actions contributes ultimately to a health care consumer. In conclusion, author represents a major the new upgrade of above mentioned problem. By advising that court should assess actively for the perspective of victim for medical negligence we will be able to exercise remedies of patients' rights and to prevent recurring medical accidents and also contribute to medical advances.

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A Verifiable and Traceable Secondhand Digital Media Market Protocol

  • Chen, Chin-Ling;Chen, Chin-Chang
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.5 no.8
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    • pp.1472-1491
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    • 2011
  • As used product transactions are currently on the rise, the demand for transactions of secondhand digital content will grow in the future; thus, learning to make secure transactions while avoiding cyber attacks becomes an important issue. In this paper, we combine the new buyer's secret key, the new buyer's watermark to embed in resold digital content, and the reseller's encrypted watermark, which can prove legal ownership of the reseller. Using the privacy homomorphism property of RSA and exponential calculus, the original seller of digital content can verify the legality of the reseller and the new buyer. We also reduced the load of encryption/decryption digital content using a partial encryption/decryption algorithm to make our protocol more efficient and practical. In the proposed protocol, the seller is not able to conduct piracy and easily frame any other innocent secondhand buyer when a case of piracy is found. In fact, piracy can be clearly traced using the privacy homomorphism property of RSA and the embedded watermark mechanism. Further, in the proposed protocol, the seller himself can trace the piracy using exponential calculus. Since it is unnecessary to trust third party participation, the conspiracy problem is resolved and the new buyer is not required to participate in the dispute. Moreover, the seller, reseller and new buyer can simultaneously benefit from the secondhand transaction.

Joint Mode Selection, Link Allocation and Power Control in Underlaying D2D Communication

  • Zhang, Wei;He, Wanbing;Wu, Dan;Cai, Yueming
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.10 no.11
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    • pp.5209-5228
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    • 2016
  • Device-to-device (D2D) communication underlaying cellular networks can bring significate benefits for improving the performance of mobile services. However, it hinges on elaborate resource sharing scheme to coordinate interference between cellular users and D2D pairs. We formulate a joint mode selection, link allocation and power control optimization problem for D2D communication sharing uplink resources in a multi-user cellular network and consider the efficiency and the fairness simultaneously. Due to the non-convex difficulty, we propose a three-step scheme: firstly, we conduct mode selection for D2D pairs based on a minimum distance metric after an admission control and obtain some cellular candidates for them. And then, a cellular candidate will be paired to each D2D pair based on fairness. Finally, we use Lagrangian Algorithm to formulate a joint power control strategy for D2D pairs and their reused cellular users and a closed-form of solution is derived. Simulation results demonstrate that our proposed algorithms converge in a short time. Moreover, both the sum rate of D2D pairs and the energy efficiency of cellular users are improved.

Sector-based Charging Schedule in Rechargeable Wireless Sensor Networks

  • Alkhalidi, Sadam;Wang, Dong;Al-Marhabi, Zaid A. Ali
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.11 no.9
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    • pp.4301-4319
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    • 2017
  • Adopting mobile chargers (MC) in rechargeable wireless sensors network (R-WSN) to recharge sensors can increase network efficiency (e.g., reduce MC travel distance per tour, reduce MC effort, and prolong WSN lifetime). In this study, we propose a mechanism to split the sensing field into partitions that may be equally spaced but differ in distance to the base station. Moreover, we focus on minimizing the MC effort by providing a new charging mechanism called the sector-based charging schedule (SBCS), which works to dispatch the MC in charging trips to the sector that sends many charging requests and suggesting an efficient sensor-charging algorithm. Specifically, we first utilize the high ability of the BS to divide the R-WSN field into sectors then it select the cluster head for each sector to reduce the intra-node communication. Second, we formulate the charging productivity as NP-hard problem and then conduct experimental simulations to evaluate the performance of the proposed mechanism. An extensive comparison is performed with other mechanisms. Experimental results demonstrate that the SBCS mechanism can prolong the lifetime of R-WSNs by increasing the charging productivity about 20% and reducing the MC effort by about 30%.

SPH Code Development and Validation for Numerical Simulation of Liquid-Liquid Swirl Coaxial Injector (액체-액체 동축형 스월 인젝터의 수치적 모사를 위한 SPH 코드 개발 및 검증)

  • Kim, You-Cheon;Sirotkin, Fedir V.;Yoh, Jai-Ick
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.43 no.1
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    • pp.8-22
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    • 2015
  • Most jet spray and atomization simulations are done with the Eulerian method which has inherent disadvantage in representing jet breakups and droplets. Full Lagrangian particles method called Smoothed Particle Hydrodynamics(SPH) is used in this work. We develop the SPH code and perform validations that confirm the suitability of our SPH method for simulating liquid jet atomization problem. Then, we conduct the simulation of liquid-liquid swirl coaxial injector for comparison against the experimental data.

Optimized Charging in Large-Scale Deployed WSNs with Mobile Charger

  • Qin, Zhenquan;Lu, Bingxian;Zhu, Ming;Sun, Liang;Shu, Lei
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.10 no.12
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    • pp.5307-5327
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    • 2016
  • Restricted by finite battery energy, traditional wireless sensor networks (WSNs) can only maintain for a limited period of time, resulting in serious performance bottleneck in long-term deployment of WSN. Fortunately, the advancement in the wireless energy transfer technology provides a potential to free WSNs from limited energy supply and remain perpetual operational. A mobile charger called wireless charging vehicle (WCV) is employed to periodically charge each sensor node and keep its energy level above the minimum threshold. Aiming at maximizing the ratio of the WCV's vocation time over the cycle time as well as guaranteeing the perpetual operation of networks, we propose a feasible and optimal solution to this issue within the context of a real-time large-scale deployed WSN. First, we develop two different types of charging cycles: initialization cycles and renewable cycles and give relevant algorithms to construct these two cycles for each sensor node. We then formulate the optimization problem into an optimal construction algorithm and prove its correctness through theoretical analysis. Finally, we conduct extensive simulations to demonstrate the effectiveness of our proposed algorithms.

The Effects of Multiplication Play Activities on Elementary School Students' Mathematical Thinking Ability and Mathematical Attitude (곱셈구구 놀이활동이 수학적 사고력과 수학적 태도에 미치는 영향)

  • Oh, Sujin;Sohn, Gyoyong
    • East Asian mathematical journal
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    • v.36 no.2
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    • pp.253-271
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    • 2020
  • The purpose of this study was to see the effects of a learning method of the multiplication play activities on improving the mathematical thinking ability and mathematical attitude of 2nd grade students in elementary school. We chose 19 students of the 2nd grade experimental group of D elementary school in the D city to conduct this research. The result of this study are as follows. First, Classes using multiplicative play activities have a positive effect on students' mathematical thinking ability. When analyzing transcripts and activities, students were able to think of strategies that could solve the problem according to the situation. Second, Classes using multiplicative play activities, in result of this they have positive effect mathematical attitude than using textbook in terms of attitude about mathematical subject and habits of study. In conclusion, the multiplication play activities are effective to improve mathematical thinking ability and attitude of second elementary school students. It can be a implication for the method of improving mathematical thinking ability and attitude.

A Note on the Problems and Improvements in Statistical Education of Elementary School (초등 통계 교육의 문제점 및 그 해결방안)

  • Kim, Sang-Lyong
    • Education of Primary School Mathematics
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    • v.12 no.2
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    • pp.133-143
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    • 2009
  • In this thesis, we conduct a comprehensive analysis of the current situation and the inherent problems found in modern statistics education in Elementary School. There are statistical curriculum, 7th textbook of elementary school level, practise of statistics class, connection of real life etc. Through analysis of these given problem, we explore the future direction of statistical education. Therefore, the statistical learning to make statistical situations and pose problems based on students' interests and students-related situations should be an effects on positive mathematical attitude and statistical thinking which could develop understanding statistical problems and thinking.

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Origin of Multiple Conductance Peaks in Single-Molecule Junction Experiments

  • Park, Min Kyu;Kim, Hu Sung;Kim, Yong-Hoon
    • Proceedings of the Korean Vacuum Society Conference
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    • 2013.02a
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    • pp.654-654
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    • 2013
  • One of the most important yet unresolved problems in molecular electronics is the controversy over the number and nature of multiple conductance peaks in single-molecule junctions. Currently, there are three competing explanations of this observation: (1) manifestation of different molecule-electrode contact geometries, (2) formation of gauche defects within the molecular core, (3) involvement of different electrode surface orientations [1]. However, the exact origin of multiple conductance peaks is not yet fully understood, which indicates our incomplete understanding of the scientifically as well as techno-logically important organic-metal contacts. To theoretically resolve this problem, we previously applied a multiscale computational approach that combines force fields molecular dynamics (FF MD), density functional theory (DFT), and matrix Green's function (MGF) calculations [2] to a thermally fluctuating haxanedithiol (C6DT) molecule stretched between flat Au(111) electrodes, but could observe only a single conductance peak [3]. In this presentation, using DFT geometry optimizations and MGF calculations, we consider molecular junctions with more realistic molecule-metal contact conformations and Au(111) electrode surface directions. We also conduct DFT-based molecular dynamics for the highly stretched junction models to confirm our conclusion. We conclude that the S-Au coordination number should be the more dominant factor than the electrode surface orientation.

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Analysis of Research status based on Citation Context

  • Kim, Byungkyu;Choi, Seon-heui;Kang, Muyeong;Kang, Ji-Hoon
    • International Journal of Contents
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    • v.11 no.2
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    • pp.63-68
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    • 2015
  • A citation analysis utilizes the relations among citations and is the most popular bibliometric method. This analysis is based on 1) the evaluation by paper, journal and researcher of the research output, 2) the identification of emerging research topics, 3) the production of a map of the intellectual structure of the research domain and 4) various services for academic information. However, this approach has a limitation in that a citation is treated in a very simple manner, even though the purpose of citation can vary greatly. To address this problem, new approaches have been studied that take into account the citation context. This research separates the citations according to the citation functions and tries to conduct an analysis according to the newly classified citations. Furthermore, research on the citation summarization and visualization based on both the citation context and the citation function of the citations was also attempted. However, since there are very few studies related to citation context in South Korea, more research and development is needed in this area. This study analyzes the status of the research in terms of the citation context. For this, we utilized social network analysis methods.