8 research outputs found
Exploring the Power of Topic Modeling Techniques in Analyzing Customer Reviews: A Comparative Analysis
The exponential growth of online social network platforms and applications
has led to a staggering volume of user-generated textual content, including
comments and reviews. Consequently, users often face difficulties in extracting
valuable insights or relevant information from such content. To address this
challenge, machine learning and natural language processing algorithms have
been deployed to analyze the vast amount of textual data available online. In
recent years, topic modeling techniques have gained significant popularity in
this domain. In this study, we comprehensively examine and compare five
frequently used topic modeling methods specifically applied to customer
reviews. The methods under investigation are latent semantic analysis (LSA),
latent Dirichlet allocation (LDA), non-negative matrix factorization (NMF),
pachinko allocation model (PAM), Top2Vec, and BERTopic. By practically
demonstrating their benefits in detecting important topics, we aim to highlight
their efficacy in real-world scenarios. To evaluate the performance of these
topic modeling methods, we carefully select two textual datasets. The
evaluation is based on standard statistical evaluation metrics such as topic
coherence score. Our findings reveal that BERTopic consistently yield more
meaningful extracted topics and achieve favorable results.Comment: 13 page
Optimizing Multi-Class Text Classification: A Diverse Stacking Ensemble Framework Utilizing Transformers
Customer reviews play a crucial role in assessing customer satisfaction,
gathering feedback, and driving improvements for businesses. Analyzing these
reviews provides valuable insights into customer sentiments, including
compliments, comments, and suggestions. Text classification techniques enable
businesses to categorize customer reviews into distinct categories,
facilitating a better understanding of customer feedback. However, challenges
such as overfitting and bias limit the effectiveness of a single classifier in
ensuring optimal prediction. This study proposes a novel approach to address
these challenges by introducing a stacking ensemble-based multi-text
classification method that leverages transformer models. By combining multiple
single transformers, including BERT, ELECTRA, and DistilBERT, as base-level
classifiers, and a meta-level classifier based on RoBERTa, an optimal
predictive model is generated. The proposed stacking ensemble-based multi-text
classification method aims to enhance the accuracy and robustness of customer
review analysis. Experimental evaluations conducted on a real-world customer
review dataset demonstrate the effectiveness and superiority of the proposed
approach over traditional single classifier models. The stacking ensemble-based
multi-text classification method using transformers proves to be a promising
solution for businesses seeking to extract valuable insights from customer
reviews and make data-driven decisions to enhance customer satisfaction and
drive continuous improvement
Unmasking Falsehoods in Reviews: An Exploration of NLP Techniques
In the contemporary digital landscape, online reviews have become an
indispensable tool for promoting products and services across various
businesses. Marketers, advertisers, and online businesses have found incentives
to create deceptive positive reviews for their products and negative reviews
for their competitors' offerings. As a result, the writing of deceptive reviews
has become an unavoidable practice for businesses seeking to promote themselves
or undermine their rivals. Detecting such deceptive reviews has become an
intense and ongoing area of research. This research paper proposes a machine
learning model to identify deceptive reviews, with a particular focus on
restaurants. This study delves into the performance of numerous experiments
conducted on a dataset of restaurant reviews known as the Deceptive Opinion
Spam Corpus. To accomplish this, an n-gram model and max features are developed
to effectively identify deceptive content, particularly focusing on fake
reviews. A benchmark study is undertaken to explore the performance of two
different feature extraction techniques, which are then coupled with five
distinct machine learning classification algorithms. The experimental results
reveal that the passive aggressive classifier stands out among the various
algorithms, showcasing the highest accuracy not only in text classification but
also in identifying fake reviews. Moreover, the research delves into data
augmentation and implements various deep learning techniques to further enhance
the process of detecting deceptive reviews. The findings shed light on the
efficacy of the proposed machine learning approach and offer valuable insights
into dealing with deceptive reviews in the realm of online businesses.Comment: 6 pages, 3 figure
Efficacy of cognitive pragmatic treatment on theory of mind functioning, quality of life and reduction of symptom severity in adults with schizophrenia
Objective: Schizophrenia is a severely debilitating disorder characterized by heterogeneous psychopathology, it impacts an individual’s subjective well-being, pragmatic communication skills, and cognitive functioning. The primary aim of this research was to evaluate the effectiveness of cognitive pragmatic treatment (CPT), an evidence-based group intervention program, on theory of mind (ToM) functioning, quality of life (QoL), and symptom severity of disorder in adults with schizophrenia.
Methods: One hundred individuals diagnosed with schizophrenia were chosen and randomly split into two groups, as control group (n=25) and experimental group (n=75). Experimental group received CPT for 3 months, while the control group got only routine psychiatric care. The individuals were assessed for symptom severity of the disorder, ToM functioning and QoL before and after the intervention. 3-months post-intervention, a follow-up evaluation was carried out. The data were analysed using both parametric as well as nonparametric statistics.
Results: The results of two-way Repeated Measure ANOVA found statistically significant differences between groups as well as tests (p<0.001) and between groups and their interaction with the tests (p<0.001). Experimental post-test as well as follow-up evaluation showed significant improvement in reducing the symptom severity of the disorder, improvement in ToM functioning and QoL compared to control group
Conclusion: The current study demonstrates that cognitive pragmatic treatment as evidence-based intervention can improve theory of mind functioning, as well as QoL of individuals with schizophrenia, by reducing the symptom severity
Graph-based methods for cervical cancer segmentation: Advancements, limitations, and future directions
Cervical cancer remains a significant health concern worldwide, where precise segmentation of cervical lesions is integral for effective diagnosis and treatment planning. This systematic review critically evaluates the application of graph-based methodologies for cervical cancer segmentation, identifying their potential, drawbacks, and avenues for future development. An exhaustive literature search across Scopus and PubMed databases resulted in 20 pertinent studies. These studies were assessed focusing on their implementation of graph-based techniques for cervical cancer segmentation, the utilized datasets, evaluation metrics, and reported precision levels. The review highlights the progressive strides made in the field, especially regarding the segmentation of intricate, non-convex regions and facilitating the detection and grading of cervical cancer using graph-based methodologies. Nonetheless, several constraints were evident, including a dearth of comparative performance analysis, reliance on high-resolution images, difficulties in specific boundary delineation, and the imperative for additional validation and diversified datasets. The review suggests future work to integrate advanced deep learning strategies for heightened accuracy, formulate hybrid methodologies to counteract existing limitations, and explore multi-modal fusion to boost segmentation precision. Emphasizing the explainability and interpretability of outcomes also stands paramount. Lastly, addressing critical challenges such as scarcity of annotated data, the need for real-time and interactive segmentation, and the segmentation of multiple objects or regions of interest remains a crucial frontier for future endeavors
A novel type of quantum dot–transferrin conjugate using DNA hybridization mimics intracellular recycling of endogenous transferrin
International audienc
Fast, Efficient, and Stable Conjugation of Multiple DNA Strands on Colloidal Quantum Dots
A novel method for covalent conjugation
of DNA to polymer coated
quantum dots (QDs) is investigated in detail. This method is fast
and efficient: up to 12 DNA strands can be covalently conjugated per
QD in optimized reaction conditions. The QD-DNA conjugates can be
purified using size exclusion chromatography and the QDs retain high
quantum yield and excellent stability after DNA coupling. We explored
single-stranded and double-stranded DNA coupling, as well as various
lengths. We show that the DNA coupling is most efficient for short
(15 mer) single-stranded DNA. The DNA coupling has been performed
on QDs emitting at four different wavelengths, as well as on gold
nanoparticles, suggesting that this technique can be generalized to
a wide range of nanoparticles