276 research outputs found
Using Machine Learning To Measure Sentiment During The Covid-19 Pandemic
Social media has created an unprecedented way for individuals to share their concerns, fears, optimism, and happiness, for example, in ways that were not even conceivable some 20 years ago. Extensive data from these social media platforms, such as Twitter, makes it an invaluable resource for opinion mining and sentiment analysis. Starting in December 2019, the corona virus pandemic has had devastating consequences all over the planet, sparing no country. Health, social, and economic tolls associated with the pandemic has generated intense emotions and spread fear in people of all ages, genders, and races. During these difficult times, many have shared their feelings and opinions on many aspects of their lives via Twitter. In this project we use machine learning to measure subjectivity polarity in COVID-19 related tweets, labelling it as positive, negative, and neutral, depending upon the vocabulary encountered in the tweets. Our work focused on a detailed study of the distribution of opinions among the primary U.S. states. We also tested the relationship between the sentiment scores and the cases of COVID-19 in the United States, establishing a link between the sentiment scores, the reported cases and the death toll. The findings may assist with implementing legislation related to COVID-19, act as a reference for scientific work, inform and educate the public on critical pandemic-related issues.https://ir.library.illinoisstate.edu/urs2021it/1002/thumbnail.jp
Identifying Key Factors influencing cost variation of construction projects in Ho Chi Minh City
Cost variation is one of the most concerns of the stakeholders in the construction projects, because it always presents in every construction projects, especially in Vietnam. However, the factors that make the project cost variation are not easy to identify. This study aimed to identify the key factors that influence to the project cost variation. A survey questionnaire was used to collect data from construction practitioners. The analysis results show that there are five groups of factors that influence to project cost variation: Government policies, nature, resources, fraud and theft, and ability of stakeholders. Recommendations are also mentioned to deal with the project cost variation
The Effects of Dark Triad Traits and Perceived Law Enforcement Competence in Responding to Ransomware Attacks
Study the appropriate conditions to obtain germinated brown rice with high biological activity
ABSTRACT – QMFS 2019Germinated brown rice strains contain more bioactive substances than germinated regular rice ones, however germination conditions play an important role in the activity and the content of those substances. The proper germination process provides the optimized active ingredients from rice that can be used for the production of nutritious beverages. In this study, we investigated the effects of pH, temperature and incubation time in microaerobic culture condition on the change of bioactive substances in AnhDao brown rice. The optimal germination condition with pH at 3, temperature of 35 0C and time for 36h release 109.11U/g of the α-amylase activity, 17.22(U/g) of the enzyme glutamate decacboxylase (GAD), 1.38(U/g) of protease, 231.76mg/100g of GABA content and 21.9 (mgGAE/100g) of polyphenol from germinated AnhDao brown rice. In nutrient evaluation, germinated AnhDao brown rice contains 65.53% of starch, 2.49% of lipid, 9.13%of protein, 2.04% of reducing sugar, and 1.26% of ash.Key words: Germinated brown rice, bioactive substances, α-amylase, protease, glutamate decacboxylase (GAD), Gamma aminobutyric acid (GABA)
Selection of Exercises to Improve the Effectiveness of Physical Education under the Project of Elective Sports Cockpitching for Female Students K2023 Hanoi Metropolitan University
The interview results have selected 36 exercises belonging to 5 exercise groups to improve the effectiveness of physical education according to the project for female Hanoi Metropolitan University students studying the optional sport of shuttlecock, including Group 1: Exercises to develop strength quickly has 7 exercises; Group 2: Strength development exercises have 6 exercises; Group 3: Exercises to develop endurance has 5 exercises; Group 4: Exercises to develop flexibility and coordination has 5 exercises; Group 5: Exercises with the bridge has 13 exercises with an agreement level of > 70% or more and an average score of > 3.41 - 4.20 points.
 
Identifying causes of material wastage on construction sites in Vietnam
The wastage of materials on construction sites caused unnecessary losses to contractors. Curbing material waste is important to save costs for contractors and then to improve their competitive advantages in the construction market. Identifying causes plays a key role in mitigation of material waste on building sites. This study is part of an ongoing research aiming to identify major causes of material waste and to reckon the percentage of material waste on building sites in Vietnam. Literature reviews and a pilot survey provided thirty-five preliminary factors. Thirteen factors resulted from statistical techniques (i.e., mean scores and one sample t-test) were considered as major causes of material waste at site through a questionnaire survey of construction professionals, who worked for medium or large construction firms. The top-five main causes are: (1) incapable workers and site engineers; (2) changes to design; (3) late information about types and sizes of products to the contractor; (4) incapable storekeepers; and (5) waste from inappropriate construction processes. It is concluded that there is a need for enhancing the capability of workers and site engineers for mitigating the material wastage at site related to operation problems. The findings of this research can be used as a guideline to overcome material waste in the VCI as well as in other developing countries. The results of this study may expect to be useful not only to practitioners and researchers in Vietnam but also to participants in other developing countries
Fairness Continual Learning Approach to Semantic Scene Understanding in Open-World Environments
Continual semantic segmentation aims to learn new classes while maintaining
the information from the previous classes. Although prior studies have shown
impressive progress in recent years, the fairness concern in the continual
semantic segmentation needs to be better addressed. Meanwhile, fairness is one
of the most vital factors in deploying the deep learning model, especially in
human-related or safety applications. In this paper, we present a novel
Fairness Continual Learning approach to the semantic segmentation problem. In
particular, under the fairness objective, a new fairness continual learning
framework is proposed based on class distributions. Then, a novel Prototypical
Contrastive Clustering loss is proposed to address the significant challenges
in continual learning, i.e., catastrophic forgetting and background shift. Our
proposed loss has also been proven as a novel, generalized learning paradigm of
knowledge distillation commonly used in continual learning. Moreover, the
proposed Conditional Structural Consistency loss further regularized the
structural constraint of the predicted segmentation. Our proposed approach has
achieved State-of-the-Art performance on three standard scene understanding
benchmarks, i.e., ADE20K, Cityscapes, and Pascal VOC, and promoted the fairness
of the segmentation model
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