Cloud providers face issues with cost efficiency due to the inefficient utilization of resources within their clusters. To improve efficiency, cloud resource management systems use techniques such as autoscaling and o...
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ISBN:
(纸本)9798400706523
Cloud providers face issues with cost efficiency due to the inefficient utilization of resources within their clusters. To improve efficiency, cloud resource management systems use techniques such as autoscaling and overcommiting resources across users, where it is necessary to predict future resource usage. However, it is very challenging to generate accurate predictions, due to the wide variety of observed and unseen patterns. Recent works show that representation learning is very effective in generic time series forecasting. Inspired from this, we propose a system prototype for predicting cloud resource usage using representation learning. Our approach transforms time series into embeddings and explores their spatial proximity to generate predictions about future resource usage. Our experimental analysis acts as a proof-of-concept and shows that the proposed approach delivers highly accurate forecasts, significantly outperforming current machine learning baselines. Future directions of this work will focus on refining certain aspects of our proposed system and address remaining challenges and limitations.
Human psychological constructs form the cornerstone of our understanding of cognition, emotion, and behavior, which are crucial to health informatics and HCI studies. However, current psychological construct analyses ...
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Human trust is recognized as being central to integration of AI systems into organizational settings and workflows. However, trust is a highly context-dependent, state-based attitude that can be influenced by hundreds...
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The diversity of Instruction Set Architectures (ISAs), each with its unique constraints and optimization strategies, presents significant opportunities and challenges in processor design. Modern processor vendors expl...
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The modern trend of exploring Artificial Intelligence (AI) in various industries, such as big data, edge computing, automobile, and medical applications, has increased tremendously. As functionalities grow, energy-eff...
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ISBN:
(纸本)9798350393545
The modern trend of exploring Artificial Intelligence (AI) in various industries, such as big data, edge computing, automobile, and medical applications, has increased tremendously. As functionalities grow, energy-efficient hardware for AI devices becomes crucial. To address that, Computation-in-Memory (CiM) using Non-Volatile Memories (NVMs) offers a promising solution. However, security is also an important concern in this computation paradigm. In this work, we analyze the vulnerability for power side-channel attacks on Multiply-Accumulate (MAC) operations implemented in CiM architecture based on emerging NVMs. Our results show that peripheral devices such as Analog-to-Digital Converters (ADCs) leak much more sensitive information than the crossbar itself because of its significant power consumption. Therefore, we propose a circuit-level countermeasure based on hiding for the ADCs of memristive CiM architecture to mitigate the power attacks. The efficiency of our proposed countermeasure is shown by both attacks and leakage assessment methodologies using a maximum of one million measurement traces.
Uncertainty in the predictions of learning enabled components hinders their deployment in safety-critical cyber-physical systems (CPS). A shift from the training distribution of a learning enabled component (LEC) is o...
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ISBN:
(纸本)9798400700361
Uncertainty in the predictions of learning enabled components hinders their deployment in safety-critical cyber-physical systems (CPS). A shift from the training distribution of a learning enabled component (LEC) is one source of uncertainty in the LEC's predictions. Detection of this shift or out-of-distribution (OOD) detection on individual datapoints has therefore gained attention recently. But in many applications, inputs to CPS form a temporal sequence. Existing techniques for OOD detection in time-series data for CPS either do not exploit temporal relationships in the sequence or do not provide any guarantees on detection. We propose using deviation from the in-distribution temporal equivariance as the non-conformity measure in conformal anomaly detection framework for OOD detection in time-series data for CPS. computing independent predictions from multiple conformal detectors based on the proposed measure and combining these predictions by Fisher's method leads to the proposed detector CODiT with bounded false alarms. We illustrate the efficacy of CODiT by achieving state-of-the-art results in autonomous driving systems with perception (or vision) LEC. We also perform experiments on medical CPS for GAIT analysis where physiological (non-vision) data is collected with force-sensitive resistors attached to the subject's body. Code, data, and trained models are available at https://***/kaustubhsridhar/time-series-OOD
Modern computer processors improve their computing power by having multiple cores. Traditionally these cores were homogeneous: many identical cores with the same capabilities. Instead it is possible to create processo...
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ISBN:
(纸本)9798350355543
Modern computer processors improve their computing power by having multiple cores. Traditionally these cores were homogeneous: many identical cores with the same capabilities. Instead it is possible to create processors that have heterogeneous (or hybrid) cores, where the various cores have differing capabilities. This can lead to energy savings and other efficiencies, but complicates performance analysis. Heterogeneous cores have been common for years in embedded ARM processors; recently support has appeared in x86 desktop processors as well. It is likely that before long server and high-performance systems will also gain hybrid *** look at current Linux support for heterogeneous processors and detail the various problems encountered when adding support for them to the PAPI performance measurement library.
Analyzing dance moves and routines is a foundational step in learning dance. Videos are often utilized at this step, and advancements in machine learning, particularly in human-movement recognition, could further assi...
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ISBN:
(纸本)9798400703300
Analyzing dance moves and routines is a foundational step in learning dance. Videos are often utilized at this step, and advancements in machine learning, particularly in human-movement recognition, could further assist dance learners. We developed and evaluated a Wizard-of-Oz prototype of a video comprehension tool that offers automatic in-situ dance move identification functionality. Our system design was informed by an interview study involving 12 dancers to understand the challenges they face when trying to comprehend complex dance videos and taking notes. Subsequently, we conducted a within-subject study with 8 Cuban salsa dancers to identify the benefits of our system compared to an existing traditional feature-based search system. We found that the quality of notes taken by participants improved when using our tool, and they reported a lower workload. Based on participants interactions with our system, we offer recommendations on how an AI-powered span-search feature can enhance dance video comprehension tools.
Engagingness is an important measurement for evaluating open-domain conversational systems. The standard approach to evaluating dialogue engagingness is by measuring conversation turns per session (CTPS), which implie...
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ISBN:
(纸本)9798400700354
Engagingness is an important measurement for evaluating open-domain conversational systems. The standard approach to evaluating dialogue engagingness is by measuring conversation turns per session (CTPS), which implies that the dialogue length is the main predictor of the user engagement with a dialogue system. The main limitation of CTPS is that it can only be measured at the session level, i.e., once the dialogue is over. But a dialogue system has to continuously monitor user engagement throughout the dialogue session as well. Existing approaches to measuring turn-level engagingness require human annotations for training. We pioneer an alternative approach, Weakly Supervised Engagingness Evaluator (WeSEE), which uses the remaining depth for each turn as a heuristic weak label for engagingness. WeSEE does not require human annotations and also relates closely to CTPS, thus serving as a good learning proxy for this metric. We show that WeSEE achieves the new state-of-the-art results on the Fine-grained Evaluation of Dialog dataset (0.38 Spearman correlation coefficient) and the DailyDialog dataset (0.62 Spearman correlation coefficient).
This article studies how to detect and explain concept drift. Human activity recognition is used as a case study together with a online batch learning situation where the quality of the labels used in the model updati...
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