78 research outputs found
Complementary Domain Adaptation and Generalization for Unsupervised Continual Domain Shift Learning
Continual domain shift poses a significant challenge in real-world
applications, particularly in situations where labeled data is not available
for new domains. The challenge of acquiring knowledge in this problem setting
is referred to as unsupervised continual domain shift learning. Existing
methods for domain adaptation and generalization have limitations in addressing
this issue, as they focus either on adapting to a specific domain or
generalizing to unseen domains, but not both. In this paper, we propose
Complementary Domain Adaptation and Generalization (CoDAG), a simple yet
effective learning framework that combines domain adaptation and generalization
in a complementary manner to achieve three major goals of unsupervised
continual domain shift learning: adapting to a current domain, generalizing to
unseen domains, and preventing forgetting of previously seen domains. Our
approach is model-agnostic, meaning that it is compatible with any existing
domain adaptation and generalization algorithms. We evaluate CoDAG on several
benchmark datasets and demonstrate that our model outperforms state-of-the-art
models in all datasets and evaluation metrics, highlighting its effectiveness
and robustness in handling unsupervised continual domain shift learning
Detecting Worker Attention Lapses in Human-Robot Interaction: An Eye Tracking and Multimodal Sensing Study
The advent of industrial robotics and autonomous systems endow human-robot
collaboration in a massive scale. However, current industrial robots are
restrained in co-working with human in close proximity due to inability of
interpreting human agents' attention. Human attention study is non-trivial
since it involves multiple aspects of the mind: perception, memory, problem
solving, and consciousness. Human attention lapses are particularly problematic
and potentially catastrophic in industrial workplace, from assembling
electronics to operating machines. Attention is indeed complex and cannot be
easily measured with single-modality sensors. Eye state, head pose, posture,
and manifold environment stimulus could all play a part in attention lapses. To
this end, we propose a pipeline to annotate multimodal dataset of human
attention tracking, including eye tracking, fixation detection, third-person
surveillance camera, and sound. We produce a pilot dataset containing two fully
annotated phone assembly sequences in a realistic manufacturing environment. We
evaluate existing fatigue and drowsiness prediction methods for attention lapse
detection. Experimental results show that human attention lapses in production
scenarios are more subtle and imperceptible than well-studied fatigue and
drowsiness.Comment: 6 page
Molecular Evolution Patterns in Metastatic Lymph Nodes Reflect the Differential Treatment Response of Advanced Primary Lung Cancer
Tumor heterogeneity influences the clinical outcome of patients with cancer, and the diagnostic method to measure the tumor heterogeneity needs to be developed. We analyzed genomic features on pairs of primary and multiple metastatic lymph nodes from six patients with lung cancer using whole-exome sequencing and RNA sequencing. Although somatic single-nucleotide variants were shared in primary lung cancer and metastases, tumor evolution predicted by the pattern of genomic alterations was matched to anatomic location of the tumors. Four of six cases exhibited a branched clonal evolution pattern. Lymph nodes with acquired somatic variants demonstrated resistance to the cancer treatment. In this study, we demonstrated that multiple biopsies and sequencing strategies for different tumor regions are required for a comprehensive understanding of the landscape of genetic alteration and for guiding targeted therapy in advanced primary lung cancer. Cancer Res; 76(22); 6568-76. ©2016 AACR
Small and Medium Amplitude Oscillatory Shear Rheology of Model Branched Polystyrene (PS) Melts
Linear and nonlinear rheological properties of model comb polystyrenes (PS) with loosely to densely grafted architectures were measured under small and medium amplitude oscillatory shear (SAOS and MAOS) flow. This comb PS set had the same length of backbone and branches but varied in the number of branches from 3 to 120 branches. Linear viscoelastic properties of the comb PS were compared with the hierarchical model predictions. The model underpredicted zero-shear viscosity and backbone plateau modulus of densely branched comb with 60 or 120 branches because the model does not include the effect of side chain crowding. First- and third-harmonic nonlinearities reflected the hierarchy in the relaxation motion of comb structures. Notably, the low-frequency plateau values of first-harmonic MAOS moduli scaled with M (total molecular weight), reflecting dynamic tube dilution (DTD) by relaxed branches. Relative intrinsic nonlinearity Q exhibited the difference between comb and bottlebrush via no low-frequency Q peak of bottlebrush corresponding to backbone relaxation, which is probably related to the stretched backbone conformation in bottlebrush
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