346 research outputs found
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An Exploratory Investigation of Frontline Employees’ Family Interferences on Job Attitudes and Service Outcomes
This study examines the negative spillover effect of hospitality frontline employees’ work-family conflicts on their affective reactions and commitment and on customer satisfaction. As a field survey indicated, frontline employees’ role conflicts between work and family result in less positive affective job-related reactions, decreased emotional attachment to the organization, and lower levels of customer satisfaction. The findings suggest that tourism & hospitality organizations need to be aware of how factors outside the workplace influence service excellence
A Semismooth Newton-CG Augmented Lagrangian Method for Large Scale Linear and Convex Quadratic SDPS
Ph.DDOCTOR OF PHILOSOPH
SOX Genes and Cancer
Transcription factors play a critical role in regulating the gene expression programs that establish and maintain specific cell states in humans. Deregulation of these gene expression programs can lead to a broad range of diseases including cancer. SOX transcription factors are a conserved group of transcriptional regulators that mediates DNA binding by a highly conserved high-mobility group (HMG) domain. Numerous evidence has recently demonstrated that SOX transcription factors critically control cell fate and differentiation in major developmental processes, and that their upregulation may be important for cancer progression. In this review, we discuss recent advances in our understanding of the role of SOX genes in cancer
3DFill:Reference-guided Image Inpainting by Self-supervised 3D Image Alignment
Most existing image inpainting algorithms are based on a single view,
struggling with large holes or the holes containing complicated scenes. Some
reference-guided algorithms fill the hole by referring to another viewpoint
image and use 2D image alignment. Due to the camera imaging process, simple 2D
transformation is difficult to achieve a satisfactory result. In this paper, we
propose 3DFill, a simple and efficient method for reference-guided image
inpainting. Given a target image with arbitrary hole regions and a reference
image from another viewpoint, the 3DFill first aligns the two images by a
two-stage method: 3D projection + 2D transformation, which has better results
than 2D image alignment. The 3D projection is an overall alignment between
images and the 2D transformation is a local alignment focused on the hole
region. The entire process of image alignment is self-supervised. We then fill
the hole in the target image with the contents of the aligned image. Finally,
we use a conditional generation network to refine the filled image to obtain
the inpainting result. 3DFill achieves state-of-the-art performance on image
inpainting across a variety of wide view shifts and has a faster inference
speed than other inpainting models
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An Investigation of the Effects of Front-Line Employees\u27 Work-Family Conflict on Customer Satisfaction through Exhaustion and Emotional Displays
The present study investigates the distal effects of front-line employees\u27 work-family conflict on customer satisfaction. Based on data from 200 paired employee-customer interactions at six hotels, a Structural Equation Modeling was conducted to test the hypothesized model and the results supported most of our predictions. Specifically, participants\u27 FIW (family interfering with work) was positively linked to physical, emotional, and mental exhaustion, while WIF (work interfering with family) did not have such associations. Further, individuals with higher levels of physical exhaustion were more likely to manage their emotions by faking positive emotions and suppressing negative emotions, whereas participants with higher levels of emotional exhaustion were more likely to fake positive emotions. Although faking positive emotions enhances the employee\u27s role performance, such actions failed to enhance customer satisfaction. The current research extends our knowledge of work-family conflict on employee-customer interactions and suggests that hospitality organizations need to be aware of the critical effects of employees\u27 family affairs on work behaviors and ultimately on customer satisfaction
Strong Variational Sufficiency for Nonlinear Semidefinite Programming and its Implications
Strong variational sufficiency is a newly proposed property, which turns out
to be of great use in the convergence analysis of multiplier methods. However,
what this property implies for non-polyhedral problems remains a puzzle. In
this paper, we prove the equivalence between the strong variational sufficiency
and the strong second order sufficient condition (SOSC) for nonlinear
semidefinite programming (NLSDP), without requiring the uniqueness of
multiplier or any other constraint qualifications. Based on this
characterization, the local convergence property of the augmented Lagrangian
method (ALM) for NLSDP can be established under strong SOSC in the absence of
constraint qualifications. Moreover, under the strong SOSC, we can apply the
semi-smooth Newton method to solve the ALM subproblems of NLSDP as the positive
definiteness of the generalized Hessian of augmented Lagrangian function is
satisfied.Comment: 23 page
Audio Visual Speaker Localization from EgoCentric Views
The use of audio and visual modality for speaker localization has been well
studied in the literature by exploiting their complementary characteristics.
However, most previous works employ the setting of static sensors mounted at
fixed positions. Unlike them, in this work, we explore the ego-centric setting,
where the heterogeneous sensors are embodied and could be moving with a human
to facilitate speaker localization. Compared to the static scenario, the
ego-centric setting is more realistic for smart-home applications e.g., a
service robot. However, this also brings new challenges such as blurred images,
frequent speaker disappearance from the field of view of the wearer, and
occlusions. In this paper, we study egocentric audio-visual speaker DOA
estimation and deal with the challenges mentioned above. Specifically, we
propose a transformer-based audio-visual fusion method to estimate the relative
DOA of the speaker to the wearer, and design a training strategy to mitigate
the problem of the speaker disappearing from the camera's view. We also develop
a new dataset for simulating the out-of-view scenarios, by creating a scene
with a camera wearer walking around while a speaker is moving at the same time.
The experimental results show that our proposed method offers promising
performance in this new dataset in terms of tracking accuracy. Finally, we
adapt the proposed method for the multi-speaker scenario. Experiments on
EasyCom show the effectiveness of the proposed model for multiple speakers in
real scenarios, which achieves state-of-the-art results in the sphere active
speaker detection task and the wearer activity prediction task. The simulated
dataset and related code are available at
https://github.com/KawhiZhao/Egocentric-Audio-Visual-Speaker-Localization
An Accelerated Proximal Alternating Direction Method of Multipliers for Optimal Decentralized Control of Uncertain Systems
To ensure the system stability of the -guaranteed cost
optimal decentralized control problem (ODC), an approximate semidefinite
programming (SDP) problem is formulated based on the sparsity of the gain
matrix of the decentralized controller. To reduce data storage and improve
computational efficiency, the SDP problem is vectorized into a conic
programming (CP) problem using the Kronecker product. Then, a proximal
alternating direction method of multipliers (PADMM) is proposed to solve the
dual of the resulted CP. By linking the (generalized) PADMM with the (relaxed)
proximal point algorithm, we are able to accelerate the proposed PADMM via the
Halpern fixed-point iterative scheme. This results in a fast convergence rate
for the Karush-Kuhn-Tucker (KKT) residual along the sequence generated by the
accelerated algorithm. Numerical experiments further demonstrate that the
accelerated PADMM outperforms both the well-known CVXOPT and SCS algorithms for
solving the large-scale CP problems arising from
-guaranteed cost ODC problems
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