16 research outputs found
Learning to Relate from Captions and Bounding Boxes
In this work, we propose a novel approach that predicts the relationships
between various entities in an image in a weakly supervised manner by relying
on image captions and object bounding box annotations as the sole source of
supervision. Our proposed approach uses a top-down attention mechanism to align
entities in captions to objects in the image, and then leverage the syntactic
structure of the captions to align the relations. We use these alignments to
train a relation classification network, thereby obtaining both grounded
captions and dense relationships. We demonstrate the effectiveness of our model
on the Visual Genome dataset by achieving a recall@50 of 15% and recall@100 of
25% on the relationships present in the image. We also show that the model
successfully predicts relations that are not present in the corresponding
captions.Comment: ACL 201
Outage-Watch: Early Prediction of Outages using Extreme Event Regularizer
Cloud services are omnipresent and critical cloud service failure is a fact
of life. In order to retain customers and prevent revenue loss, it is important
to provide high reliability guarantees for these services. One way to do this
is by predicting outages in advance, which can help in reducing the severity as
well as time to recovery. It is difficult to forecast critical failures due to
the rarity of these events. Moreover, critical failures are ill-defined in
terms of observable data. Our proposed method, Outage-Watch, defines critical
service outages as deteriorations in the Quality of Service (QoS) captured by a
set of metrics. Outage-Watch detects such outages in advance by using current
system state to predict whether the QoS metrics will cross a threshold and
initiate an extreme event. A mixture of Gaussian is used to model the
distribution of the QoS metrics for flexibility and an extreme event
regularizer helps in improving learning in tail of the distribution. An outage
is predicted if the probability of any one of the QoS metrics crossing
threshold changes significantly. Our evaluation on a real-world SaaS company
dataset shows that Outage-Watch significantly outperforms traditional methods
with an average AUC of 0.98. Additionally, Outage-Watch detects all the outages
exhibiting a change in service metrics and reduces the Mean Time To Detection
(MTTD) of outages by up to 88% when deployed in an enterprise cloud-service
system, demonstrating efficacy of our proposed method.Comment: Accepted to ESEC/FSE 202
ESRO: Experience Assisted Service Reliability against Outages
Modern cloud services are prone to failures due to their complex
architecture, making diagnosis a critical process. Site Reliability Engineers
(SREs) spend hours leveraging multiple sources of data, including the alerts,
error logs, and domain expertise through past experiences to locate the root
cause(s). These experiences are documented as natural language text in outage
reports for previous outages. However, utilizing the raw yet rich
semi-structured information in the reports systematically is time-consuming.
Structured information, on the other hand, such as alerts that are often used
during fault diagnosis, is voluminous and requires expert knowledge to discern.
Several strategies have been proposed to use each source of data separately for
root cause analysis. In this work, we build a diagnostic service called ESRO
that recommends root causes and remediation for failures by utilizing
structured as well as semi-structured sources of data systematically. ESRO
constructs a causal graph using alerts and a knowledge graph using outage
reports, and merges them in a novel way to form a unified graph during
training. A retrieval-based mechanism is then used to search the unified graph
and rank the likely root causes and remediation techniques based on the alerts
fired during an outage at inference time. Not only the individual alerts, but
their respective importance in predicting an outage group is taken into account
during recommendation. We evaluated our model on several cloud service outages
of a large SaaS enterprise over the course of ~2 years, and obtained an average
improvement of 27% in rouge scores after comparing the likely root causes
against the ground truth over state-of-the-art baselines. We further establish
the effectiveness of ESRO through qualitative analysis on multiple real outage
examples.Comment: Accepted to 38th IEEE/ACM International Conference on Automated
Software Engineering (ASE 2023
Use of electronic waste plastic in asphalt mix with marble dust as filler
E-waste is becoming burgeoning global issue, which showcases the impacts of the same on environment and on humans. Marble cutting industries is another industry producing huge amount of marble dust as a waste which is degrading the environment. E-waste and waste marble dust can be utilized in construction industry in different forms thus helps in reducing its impact on environment. In this analysis, electronic waste plastic materials including recycled PCB’s and other PVC components of e-waste has been used as a partial replacement for coarse aggregates and marble dust is used as complete replacement for filler in asphalt mix for pavement. A significant increase of Marshall Stability and Flow Value has been observed as percentage of e-waste plastic increases. The plastic content of mix varies 0 %, 4 %, 8 % and 12 % by weight of aggregate. Plots of various Marshall Parameters such as Marshall Stability, Flow value, voids filled with bitumen, voids in mineral aggregates and unit weight against the bitumen content shows an improving trend of parameters with increasing the plastic replacement. Comparison with earlier published result shows that increasing the plastic replacement beyond 12% will have a negative influence on stability value. The recycling of e-waste plastic and marble dust in asphalt mix design for pavements provide us a better way of resource utilization in a cost-effective manner
Use of electronic waste plastic in asphalt mix with marble dust as filler
36-45E-waste is becoming burgeoning global issue, which showcases the impacts of the same on environment and on humans. Marble cutting industries is another industry producing huge amount of marble dust as a waste which is degrading the environment. E-waste and waste marble dust can be utilized in construction industry in different forms thus helps in reducing its impact on environment. In this analysis, electronic waste plastic materials including recycled PCB’s and other PVC components of e-waste has been used as a partial replacement for coarse aggregates and marble dust is used as complete replacement for filler in asphalt mix for pavement. A significant increase of Marshall Stability and Flow Value has been observed as percentage of e-waste plastic increases. The plastic content of mix varies 0 %, 4 %, 8 % and 12 % by weight of aggregate. Plots of various Marshall Parameters such as Marshall Stability, Flow value, voids filled with bitumen, voids in mineral aggregates and unit weight against the bitumen content shows an improving trend of parameters with increasing the plastic replacement. Comparison with earlier published result shows that increasing the plastic replacement beyond 12% will have a negative influence on stability value. The recycling of e-waste plastic and marble dust in asphalt mix design for pavements provide us a better way of resource utilization in a cost-effective manner
Asset Allocation using Regime Switching Methods
The aim of this thesis is to develop a Markov Regime Switching framework that can be used in asset allocation in conjunction with Modern Portfolio Theory. Modern Portfolio Theory has long been a popular tool among big financial institutions. However, one of its major limitations is assumption of stationary market volatility. In this paper, we develop a single period Mean Variance Optimization model that minimizes the variance of a portfolio subject to a specified expected return by combining Modern Portfolio Theory with a Markov Regime Switching framework. Then, we extend the above developed framework to be used in conjunction with a robust optimization framework as proposed by Goldfarb Iyengar in which regards we were partially successful. The portfolios constructed by the Markov Regime-Switching framework were tested out of sample to outperform those suggested by a Simple MVO One Factor model and the Robust MVO One Factor Model.M.A.S.2017-11-29 00:00:0