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2023 17th International Conference on Ubiquitous Information Management and Communication (IMCOM)最新文献

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Maximizing Spread of a Message in the Susceptible-Infected-Recovered Process 在易受感染的恢复进程中最大限度地传播消息
Kundan Kandhway
In this work we borrow models from biology (epi-demics) to model spread of a message as a Susceptible-Infected-Recovered (SIR) process. We assume that the target population is large. Further, homogeneous mixing of population is considered. The campaigner enrolls people to spread the message to maximize its reach, this is in addition to the standard epidemic spread. We term this intervention by the campaigner as enrollment. Enrollment may be done by reaching out to people through advertisements, for example, in social media, in print or electronic media, etc. An appropriate cost function is chosen and the given situation is posed as a mathematical optimization problem, more specifically, an optimal control problem. The formulated problem is mathematically analyzed. To this end, the existence of a solution to the optimal control problem is explored. Further, we study the nature of state trajectories at the optimum. We provide insights that are useful in optimizing viral marketing strategies, political or social awareness campaigns, etc.
在这项工作中,我们借用生物学(流行病)的模型,将信息的传播建模为易感-感染-恢复(SIR)过程。我们假设目标人群很大。此外,还考虑了种群的均匀混合。运动者招募人们传播信息,以最大限度地扩大其影响范围,这是除了标准的流行病传播之外。我们把活动家的这种干预称为登记。注册可以通过广告向人们宣传,例如,在社交媒体、印刷或电子媒体等。选择合适的成本函数,并将给定的情况作为一个数学优化问题,更具体地说,是一个最优控制问题。对公式化问题进行了数学分析。为此,探讨了最优控制问题解的存在性。进一步,我们研究了最优状态轨迹的性质。我们为优化病毒式营销策略、政治或社会意识活动等提供有用的见解。
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引用次数: 0
Distributed Learning of Pure Non-IID data using Latent Codes 使用潜在代码的纯非iid数据的分布式学习
Anirudh Kasturi, A. Agrawal, C. Hota
There has been a huge increase in the amount of data being generated as a result of the proliferation of high-tech, data-generating devices made possible by recent developments in mobile technology. This has rekindled interest in creating smart applications that can make use of the possibilities of this data and provide insightful results. Concerns about bandwidth, privacy, and latency arise when this data from many devices is aggregated in one location to create more precise predictions. This research presents a novel distributed learning approach, wherein a Variational Auto Encoder is trained locally on each client and then used to derive a sample set of points centrally. The server then develops a unified global model, and sends its training parameters to all users. Pure non-i.i.d. distributions, in which each client only sees data labelled with a single value, are the primary focus of our study. According to our findings, communication amongst the server and the clients takes significantly less time than it does in federated and centralised learning setups. We further demonstrate that, whenever the data is spread in a pure non-iid fashion, our methodology achieves higher accuracy than the federated learning strategy by more than 4%. We also showed that, in comparison to centralised and federated learning systems, our suggested method requires less network bandwidth.
由于最近移动技术的发展使高科技数据生成设备的扩散成为可能,因此产生的数据量大幅增加。这重新激发了人们对创建智能应用程序的兴趣,这些应用程序可以利用这些数据的可能性并提供有洞察力的结果。当来自许多设备的数据聚集在一个位置以创建更精确的预测时,就会出现带宽、隐私和延迟问题。本研究提出了一种新颖的分布式学习方法,其中变分自动编码器在每个客户端进行局部训练,然后用于集中派生点的样本集。然后,服务器开发一个统一的全局模型,并将其训练参数发送给所有用户。纯non-i.i.d。分布是我们研究的主要焦点,在分布中,每个客户只看到标有单个值的数据。根据我们的发现,服务器和客户端之间的通信比联邦和集中式学习设置所花费的时间要少得多。我们进一步证明,当数据以纯非id方式传播时,我们的方法比联邦学习策略的准确率高出4%以上。我们还表明,与集中式和联邦式学习系统相比,我们建议的方法需要更少的网络带宽。
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引用次数: 0
A Multi-Stage Method for Time Synchronization in Acoustic Underwater Communications 水声通信多阶段时间同步方法
V. Nguyen, Van Huy Nguyen, Quoc Khuong Nguyen, Tien-Dung Nguyen
Time synchronization techniques for underwater communications face challenging issues: time-varied channel, and strong color noise. In addition, since underwater channels are low in bandwidth and prone to low signal to noise ratio, one would prefer to employ a synchronization technique with low overhead. Previous synchronization techniques used preamble to synchronize, which consumes the bandwidth. In this paper, we propose a time synchronization method using the guard interval (GI) in an OFDM symbol. Herein, identical GIs are inserted at the head and tail of an OFDM symbol. At the receiver side, our method checks the difference and similarity between the heading and tailing GIs, from which it can determine the beginning of the OFDM symbol. The proposed method used an iterative technique to magnify the difference between the real signal and the background noise, so that in case of low SNR, the receiver still can perform synchronization. Simulation results show that the proposed method can effectively synchronize when the SNR is low.
水下通信的时间同步技术面临时变信道和强彩色噪声等难题。此外,由于水下信道带宽低,容易出现低信噪比,因此更愿意采用低开销的同步技术。以前的同步技术使用preamble进行同步,这会消耗带宽。本文提出了一种利用OFDM符号中的保护间隔(GI)进行时间同步的方法。在这里,在OFDM符号的头部和尾部插入相同的gi。在接收端,我们的方法检查航向和尾迹信号之间的差异和相似性,从中确定OFDM符号的开始。该方法采用迭代技术放大真实信号与背景噪声之间的差异,使接收机在低信噪比的情况下仍能进行同步。仿真结果表明,在信噪比较低的情况下,该方法能有效地实现同步。
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引用次数: 1
An Analytical Approach to Predict the Cardio Vascular Disorder 一种预测心血管疾病的分析方法
Ritu Chauhan, Nidhi Gola, Eiad Yafi
In recent times, heart disease has been recognized as the world's leading cause of death. However, it is also regarded as the disease that is most easily controlled and prevented. Recently, World Health Organization (WHO) claims that heart disease's progression and associated treatment expenses can both be significantly halted with the help of an early and prompt diagnosis. Therefore, researchers have employed various data mining approaches to diagnose heart disease in consideration of the rising number of deaths caused by the disease. This research study applied data mining classification modeling techniques, specifically discriminant analysis on the heart disease dataset for the prediction of chances of heart disease based on various attributes and assess the contribution of each attribute towards the heart disease. Lastly, the range and the accuracy of the classification are assessed. This dataset has an accuracy of 85.3% in predicting that whether individual has heart disease or not and the specificity of individual possess heart disease is 84.8% while normal individuals acquire specificity of 85.9%.
近年来,心脏病已被公认为世界上主要的死亡原因。然而,它也被认为是最容易控制和预防的疾病。最近,世界卫生组织(世卫组织)声称,在早期和及时诊断的帮助下,心脏病的进展和相关的治疗费用都可以大大停止。因此,考虑到心脏病导致的死亡人数不断上升,研究人员采用了各种数据挖掘方法来诊断心脏病。本研究应用数据挖掘分类建模技术,对心脏病数据集进行判别分析,基于各种属性预测心脏病发生几率,并评估每个属性对心脏病的贡献。最后,对分类的范围和准确率进行了评估。该数据集预测个体是否患有心脏病的准确率为85.3%,个体患有心脏病的特异性为84.8%,而正常个体的特异性为85.9%。
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引用次数: 0
Local Hashing and Fake Data for Privacy-Aware Frequency Estimation 隐私感知频率估计的局部哈希和假数据
Gatha Varma
Data collected from services and application users contain identifying attributes. The categorical attributes of user data capture information contained in a fixed set of domain values $boldsymbol{D}_{boldsymbol{m}}$. The statistical analysis of the collected data drives modeling, which in the case of categorical attributes is frequency estimation. It gives the approximate number of individuals who reported a specific value from set $boldsymbol{D}_{boldsymbol{m}}$. Under the conditions where the user data is collected repeatedly, frequency estimation may exhibit disclosure potential risks. Therefore it is important to privatize the user data such that the statistics are relevant yet minimize privacy risks. This is achieved by a set of algorithms called Frequency Oracles. Local Differential Privacy is a widely-used technique for the concerning circumstances. Additionally, several methods are used to amplify its privacy guarantees including sampling and randomization. In this paper, I propose the first sample-based frequency oracle which used Optimized Local Hashing (OLH) and was further enhanced by the replacement of some attribute values with fake data. The adaptive solution utilized the benefits offered by OLH for large-dimensioned dataset and a variance independent of dimensionality. The privacy-utility trade-off given by the proposed solution was found to be better than existing solutions for certain general and strict privacy regimes for multi-dimensional datasets.
从服务和应用程序用户收集的数据包含标识属性。用户数据捕获信息的分类属性包含在一组固定的域值$boldsymbol{D}_{boldsymbol{m}}$中。收集到的数据的统计分析驱动建模,在分类属性的情况下是频率估计。它给出了从set $boldsymbol{D}_{boldsymbol{m}}$中报告特定值的个人的大致数量。在重复收集用户数据的情况下,频率估计可能存在泄露的潜在风险。因此,将用户数据私有化是很重要的,这样统计数据是相关的,但最大限度地减少隐私风险。这是通过一组称为频率预言器的算法实现的。在这种情况下,局部差分隐私是一种广泛使用的技术。此外,还使用了抽样和随机化等方法来增强其隐私保障。在本文中,我提出了第一个基于样本的频率数据库,它使用了优化的局部哈希(OLH),并通过用假数据替换一些属性值来进一步增强。该自适应解决方案利用了OLH对大维数据集的优势和与维数无关的方差。对于多维数据集的某些一般和严格的隐私制度,所提出的解决方案给出的隐私效用权衡优于现有的解决方案。
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引用次数: 0
VNLES: A Reasoning-enable Legal Expert System using Ontology Modeling-based Method: A Case Study of Vietnam Criminal Code 基于本体建模方法的推理法律专家系统——以越南刑法典为例
Quoc Tuan Dao, T. K. Dang, Thi Phuong Hoa Nguyen, Thi Minh Chau Le
The main purpose of this research is to develop a method to model the criminal code by its essence to serve a legal reasoning-enable expert system. Ontology combines a hierarchi-cal structure and logical reasoning, that can mitigate semantic equivocation and produce the figured semantic information. The ontology is based on Description Logics Semantic Web Ontology Language (OWL-DL) extracted from the Vietnamese Penal Code. Logical relationships will be defined as rules in the Semantic Web Rule Language (SWRL) language. The fact that legal domain is very complicated, so the construction of solid legal domain ontologies is acknowledged as a difficult and complex process. This study approaches the strategy named middle-out, which is composed of two interrelated strategies: top-down and bottom-up. Moreover, the model will be used as a component in a legal reasoning-enable expert system. The reasoning-enable system is a smart system that can provide critical analytical, and evaluation for checking and evaluating an act and whether is legitimate. The system also supported the purposes of legal reasoning and law-making in the Fourth Industrial Revolution which caused the rapid development of quantity and quality high-tech crime, and new criminal minds. All are being analyzed, built, and evaluated based on Vietnam Law characteristics, but also expected to be able to apply in other countries.
本研究的主要目的是建立一种从本质上对刑法进行建模的方法,以服务于法律推理的专家系统。本体将层次结构与逻辑推理相结合,可以减少语义歧义,产生图形化的语义信息。该本体基于从越南刑法典中提取的描述逻辑语义Web本体语言(OWL-DL)。逻辑关系将被定义为语义Web规则语言(SWRL)语言中的规则。由于法律领域非常复杂,因此构建坚实的法律领域本体是一个困难而复杂的过程。本文研究的是由自上而下和自下而上两种相互关联的策略组成的中出策略。此外,该模型将作为法律推理专家系统的组成部分。推理系统是一种智能系统,可以为检查和评估行为及其是否合法提供关键的分析和评估。在第四次产业革命时期,该制度也支持了法律推理和立法的目的,导致了数量和质量的高技术犯罪和新犯罪思想的迅速发展。所有这些都是根据越南法律的特点进行分析、构建和评估的,但也希望能够适用于其他国家。
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引用次数: 0
Title and Copyright 标题及版权
R. Carr
The effects of acid identity on CH3OH dehydration are examined here using density functional theory (DFT) estimates of acid strength (as deprotonation energies, DPE) and reaction energies, combined with rate data on Keggin polyoxometalate (POM) clusters and zeolite H-BEA. Measured first-order (kmono) and zero-order (kdimer) CH3OH dehydration rate constants depend exponentially on DPE for POM clusters; the value of kmono depends more strongly on DPE than kdimer does. The chemical significance of these rate parameters and the basis for their dependences on acid strength were established by using DFT to estimate the energies of intermediates and transition states involved in elementary steps that are consistent with measured rate equations. We conclude from this treatment that CH3OH dehydration proceeds via direct reactions of co-adsorbed CH3OH molecules for relevant solid acids and reaction conditions. Methyl cations formed at ionpair transition states in these direct routes are solvated by H2O and CH3OH more effectively than those in alternate sequential routes involving methoxide formation and subsequent reaction with CH3OH. The stability of ion-pairs, prevalent as intermediates and transition states on solid acids, depend sensitively on DPE because of concomitant correlations between the stability of the conjugate anionic cluster and DPE. The chemical interpretation of kmono and kdimer from mechanism-based rate equations, together with thermochemical cycles of their respective transition state formations, show that similar charge distributions in the intermediate and transition state involved in kdimer cause its weaker dependence on DPE. Values of kmono involve uncharged reactants and the same ion-pair transition state as kdimer; these species sense acid strength differently and cause the larger effects of DPE on kmono. Confinement effects in H-BEA affect the value of kmono because the different sizes and number of molecules in reactants and transition states selectively stabilize the latter; however, they do not influence kdimer, for which reactants and transition states of similar size sense spatial constraints to the same extent. This combination of theory and experiment for solid acids of known structure sheds considerable light on the relative contributions from solvation, electrostatic, and van der Waals interactions in stabilizing cationic transition states and provides predictive insights into the relative contributions of parallel routes based on the size and charge distributions of their relevant intermediates and transition states. These findings also demonstrate how the consequences of acid strength on measured turnover rates depend on reaction conditions and their concomitant changes in the chemical significance of the rate parameters measured. Moreover, the complementary use of experiment and theory in resolving mechanistic controversies has given predictive guidance about how rate and equilibrium constants, often inextricably comb
本文利用密度泛函理论(DFT)对酸强度(作为去质子化能,DPE)和反应能的估计,结合Keggin多金属氧酸酯(POM)簇和沸石H-BEA的速率数据,研究了酸对CH3OH脱水的影响。测定的一阶(kmono)和零阶(kdimer) CH3OH脱水速率常数与聚甲醛(POM)簇的DPE呈指数关系;kmono的值比kdimer更强烈地依赖于DPE。这些速率参数的化学意义及其依赖酸强度的基础是通过使用DFT估计与测量速率方程一致的基本步骤中涉及的中间产物和过渡态的能量来建立的。我们由此得出结论,CH3OH脱水是通过共吸附CH3OH分子与相关固体酸和反应条件的直接反应进行的。在离子对过渡态形成的甲基阳离子,在这些直接途径中,比在甲氧基形成和随后与CH3OH反应的交替顺序途径中,更有效地被H2O和CH3OH溶解。由于共轭阴离子簇的稳定性与DPE之间存在相关关系,因此作为固体酸的中间产物和过渡态的离子对的稳定性对DPE有敏感的依赖性。基于机理的速率方程对kmono和kdimer的化学解释,以及它们各自过渡态形成的热化学循环表明,kdimer在中间态和过渡态中相似的电荷分布导致其对DPE的依赖性较弱。kmono的值涉及不带电的反应物和与kdimer相同的离子对过渡态;这些物种对酸强度的感觉不同,DPE对kmono的影响更大。H-BEA中的约束效应会影响kmono的值,因为反应物和过渡态中不同大小和数量的分子选择性地稳定了后者;然而,它们不影响二聚体,对于二聚体,相似大小的反应物和过渡态在相同程度上感受到空间约束。对于已知结构的固体酸,这种理论和实验的结合揭示了溶剂化、静电和范德华相互作用对稳定阳离子过渡态的相对贡献,并根据其相关中间体和过渡态的大小和电荷分布,对平行路线的相对贡献提供了预测性的见解。这些发现还表明,酸强度对测量的周转率的影响取决于反应条件及其伴随的测量速率参数的化学意义的变化。此外,实验和理论在解决机制争议方面的互补使用,为速率和平衡常数(通常不可分割地结合为测量速率参数)如何单独依赖于基于反应物、产物和相关基本步骤中涉及的过渡态中电荷的大小和空间分布的酸强度提供了预测性指导。本文为CH3OH脱水而建立的kmono, kdimer和DPE之间的独特关系可以在实践中应用于评估任何固体酸的酸强度,许多
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引用次数: 0
Optimization of VLF Capacitive-Resistive Dipole Electromagnetic Fields for Underground Utility Pipe Detection Using Artificial Bee Colony, Circle-inspired, and Genetic Metaheuristics 利用人工蜂群法、圆启发法和遗传元启发式优化地下管线探测用甚高频容阻偶极电磁场
Mike Louie C. Enriquez, R. Relano, Kate G. Francisco, Ronnie S. Concepcion, Jonah Jahara G. Baun, Adrian Genevie G. Janairo, J. A. D. Leon, A. Bandala, R. R. Vicerra, E. Dadios
Underground utility detection technology contributes significantly to the planning and repair of various infrastructures for it saves a significant amount of money on utility damages, human life risk, and operation time. With that, this study has optimized a towed equatorial dipole-dipole antenna system which was 3D-modeled in Altair CAD FEKO to produce stronger electric and magnetic fields in a transmitter-receiver configuration. The algorithm is based on EM-driven antenna correlation via the effect of dipole geometrical configurations on structure parameterization. New and efficient metaheuristic optimization methods such as the Circle Inspired Optimization Algorithm (CIOA), constrained Artificial Bee Colony (cABC), and Genetic Algorithm (GA), the highest electromagnetic fields along the top of the pipe with voltage difference of 2.30e-4 V, which is higher compared to CIOA and GA with a voltage difference of 1.81e-4 V and -1.11e-4 V, respectively. This implies the development of an effective method for more accessible and precise calculation of the electromagnetic field for the very low-frequency antenna without the need for extensive mathematical computation. Furthermore, the best distance configuration between dipoles is 0.4 m, wire diameter of 0.01 m, and Tx power of 5.0 W. This study aims to optimize an antenna system to produce more vital electric and magnetic fields in a transmitter-receiver configuration, identify the best spacing distance in the equatorial dipole-dipole antenna and characterize the correlation of the parameters such as the distance, wire antenna diameter, and transmitted power.
地下公用设施探测技术对各种基础设施的规划和维修具有重要意义,可以节省大量的公用设施损坏费用、人员生命风险和运行时间。基于此,本研究优化了拖曳赤道偶极子-偶极子天线系统,并在Altair CAD FEKO中进行了三维建模,使其在收发配置下产生更强的电场和磁场。该算法基于电磁驱动的天线相关,利用偶极子几何构型对结构参数化的影响。新型高效的元启发式优化算法(CIOA)、约束人工蜂群(cABC)和遗传算法(GA)在管道顶部的最高电磁场为2.30e-4 V,高于CIOA和GA分别为1.81e-4 V和-1.11e-4 V的电压差。这意味着发展一种有效的方法,使甚低频天线的电磁场计算更容易获得和精确,而不需要大量的数学计算。最佳偶极子间距为0.4 m,线径为0.01 m, Tx功率为5.0 W。本研究旨在优化天线系统,使其在收发配置下产生更重要的电场和磁场,确定赤道偶极-偶极天线的最佳间距距离,并表征距离、线天线直径和发射功率等参数的相关性。
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引用次数: 0
Self-Supervised Augmentation of Quality Data Based on Classification-Reinforced GAN 基于分类增强GAN的质量数据自监督增强
Seunghwan Kim, Sukhan Lee
In deep learning, the quality of ground truth training data is crucial for the resulting performance. However, depending on applications, collecting a sufficient amount of quality data from a realistic setting is problematic. In this case, data augmentation can play an important role as long as augmentation ensures data quality and diversity for training, preferably in an unsupervised way. Recently, a number of GAN variants have been emerged for improved quality in data augmentation. Although successful, further improvement is necessary for enhancing diversity in addition to quality in data augmentation. In this paper, we propose a GAN-based approach to self-supervised augmentation of quality data based on Classification-Reinforced GAN referred to here as CLS-R GAN, to extending diversity as well as quality in data augmentation. In CLS-R GAN, a discriminator-independent classifier additionally self-trains the generator by classifying the fake data, as well as augmenting the real data in an unsupervised way. Extensive experiments were conducted, including an application to augmenting liver ultrasonic image data, to verify the effectiveness of CLS-R GAN based on standard evaluation metrics. The results indicate the effectiveness of CLS-R GAN for improved quality and diversity in augmented data.
在深度学习中,地面真值训练数据的质量对最终性能至关重要。然而,根据应用程序的不同,从实际设置中收集足够数量的高质量数据是有问题的。在这种情况下,数据增强可以发挥重要作用,只要增强能够确保训练的数据质量和多样性,最好以无监督的方式进行。最近,为了提高数据增强的质量,出现了许多GAN变体。虽然取得了成功,但除了数据增加的质量外,还需要进一步改进以增强多样性。在本文中,我们提出了一种基于GAN的基于分类增强GAN (CLS-R GAN)的质量数据自监督增强方法,以扩展数据增强的多样性和质量。在CLS-R GAN中,一个独立于判别器的分类器通过对假数据进行分类,并以无监督的方式对真实数据进行扩充,从而对生成器进行自训练。我们进行了大量的实验,包括应用于增强肝脏超声图像数据,以验证基于标准评估指标的CLS-R GAN的有效性。结果表明,CLS-R GAN在提高增强数据的质量和多样性方面是有效的。
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引用次数: 1
A Development of an Early Detection System of Pre-frailty in Senior Citizens Living Inside 居家长者体弱早期检测系统之开发
T. Utsumi, Masashi Hashimoto
To ensure that elderly members of society are able to maintain a quality of life that allows them to live independently, it is important that impending frailty, which occurs between the state of begin healthy and needing nursing care, be detectable at an early stage. The purpose of this study was to establish a system to continuously measure of elderly people as they go about their daily lives at home and to detect early signs of pre-frailty. This study focused on the decrease in walking speed of elderly people in pre-frailty, designing a means of measuring walking speed using a non-wearable passive infrared (PIR) sensor that performs equivalent accuracy with conventional manual measurement. The walking speed measured by this system with an average error of 1.7% at five meters from the walking speed measured by the gating method. Further testing confirmed that walking speed could be measured with an average error of 1.5%, even at one meter. The system is feasible, cost-effective, and can be easily installed in homes for continuous measurement of the walking speed of elderly people.
为了确保社会中的老年成员能够维持使他们能够独立生活的生活质量,重要的是,在开始健康状态和需要护理之间即将出现的脆弱,必须及早发现。本研究的目的是建立一个系统,以持续测量老年人在家中的日常生活,并发现早期虚弱的迹象。本研究的重点是老年人在虚弱前期的步行速度下降,设计了一种使用非可穿戴被动红外(PIR)传感器测量步行速度的方法,其精度与传统的手动测量方法相当。该系统测量的步行速度与门控法测量的步行速度在5米处的平均误差为1.7%。进一步的测试证实,即使在一米的距离内,步行速度的平均误差也可以达到1.5%。该系统可行,性价比高,可以方便地安装在家中,连续测量老年人的步行速度。
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引用次数: 0
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2023 17th International Conference on Ubiquitous Information Management and Communication (IMCOM)
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