Using a text mining approach to hear voices of customers from social media toward the fast-food restaurant industry

Due to the COVID-19 pandemic, the sales of fast-food businesses have dropped sharply. Customer satisfaction has always been one of the key factors for the sustainable development of enterprises. However, in the fast-food restaurant business, gaining the knowledge of customer satisfaction is one of the critical tasks. Moreover, text reviews in social media have become one of important reference sources for customers’ decisions in buying services and products. Therefore, the main purpose of this study is to explore whether customer voices from social media reviews are different during the COVID-19 outbreak and to propose a new method to reduce interpersonal contact when collecting data. A text mining scheme which includes least absolute shrinkage and selection operator (LASSO) and decision trees (DT) are presented to discover the essential factors for customers to increase their satisfaction from unstructured online customer reviews. Finally, three real world review sets were employed to validate the effectiveness of the presented text mining scheme. Experimental results can help companies to properly adapt to similar epidemic situations in the future and facilitate their sustainable development. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

UNCERTAINTY BASED ON VIRUS REPORTS: WHAT IS THE EFFECT OF SARS-COV-2 ON MALE REPRODUCTION? (COVID-19 AND MALE REPRODUCTION)

Background and objectives Coronavirus disease 2019 (COVID-19) has become a pandemic. Preliminary data reported that severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) might not be found in the semen of patients in the early stages of COVID-19;however, the virus may be seen in the semen in the late, severe stages. To determine the effects of SARS-CoV-2 infection on the male reproductive system. Materials and methods We reviewed the relationship between previously reported infections with mumps virus (MuV), HIV, Zika virus, hepatitis virus B, hepatitis virus C, SARS-CoV, and influenza viruses that could possibly damage the male reproductive system, and then investigated whether SARS-CoV-2 infection could cause any damage to the male reproductive system. Results There were various reports that viruses could impair male reproduction by entering into the testicular cells, inducing inflammation, or both. Regarding SARS-CoV-2, five recent independent studies showed no evidence to suggest that SARS-CoV-2 could be found in the semen and testicular tissues, suggesting that SARS-CoV-2 would not directly damage the blood-testis barrier (BTB) in the early stages of COVID-19 infection. However, a study found that viral RNA was found in 6 out of 38 patients. Three studies found that there were some changes in the sexual hormone levels. Discussion and conclusion There is a lack of substantial evidence to determine how SARS-CoV-2 affects male reproduction at this moment. Understanding of the relationship between SARS-CoV-2 and male infertility requires further research.