scholarly journals Analysis of Bluetooth RSSI for Proximity Detection of Ship Passengers

2022 ◽  
Vol 12 (1) ◽  
pp. 517
Author(s):  
Qianfeng Lin ◽  
Jooyoung Son
Keyword(s):  
Close Contact ◽  
The Public ◽  
Contact Isolation ◽  
Proximity Detection ◽  
Rapid Spread ◽  
Improve Accuracy ◽  
Intelligent Devices ◽  
Narrow Space ◽  
Improved Accuracy ◽  
Close Contacts

Concern about the health of people who traveled onboard was raised during the COVID-19 outbreak on the Diamond Princess cruise ship. The ship’s narrow space offers an environment conducive to the virus’s spread. Close contact isolation remains one of the most critical current measures to stop the virus’s rapid spread. Contacts can be identified efficiently by detecting intelligent devices nearby. The smartphone’s Bluetooth RSSI signal is essential data for proximity detection. This paper analyzes Bluetooth RSSI signals available to the public and compares RSSI signals in two distinct poses: standing and sitting. These features can improve accuracy and provide an essential basis for creating algorithms for proximity detection. This allows for improved accuracy in identifying close contacts and can help ships sustainably manage persons onboard in the post-epidemic era.

Algorithm Comparation of Naive Bayes and Support Vector Machine based on Particle Swarm Optimization in Sentiment Analysis of Freight Forwarding Services

2020 ◽  
Vol 4 (2) ◽  
pp. 362-369
Author(s):  
Sharazita Dyah Anggita ◽  
Ikmah
Keyword(s):  
Support Vector Machine ◽  
Sentiment Analysis ◽  
Naive Bayes ◽  
Naïve Bayes ◽  
Support Vector ◽  
The Public ◽  
Svm Algorithm ◽  
Bayes Algorithm ◽  
Freight Forwarding ◽  
Improved Accuracy

The needs of the community for freight forwarding are now starting to increase with the marketplace. User opinion about freight forwarding services is currently carried out by the public through many things one of them is social media Twitter. By sentiment analysis, the tendency of an opinion will be able to be seen whether it has a positive or negative tendency. The methods that can be applied to sentiment analysis are the Naive Bayes Algorithm and Support Vector Machine (SVM). This research will implement the two algorithms that are optimized using the PSO algorithms in sentiment analysis. Testing will be done by setting parameters on the PSO in each classifier algorithm. The results of the research that have been done can produce an increase in the accreditation of 15.11% on the optimization of the PSO-based Naive Bayes algorithm. Improved accuracy on the PSO-based SVM algorithm worth 1.74% in the sigmoid kernel.

scholarly journals Exploring the Traveler’s Intentions to Use Public Transport during the COVID-19 Pandemic While Complying with Precautionary Measures

2021 ◽  
Vol 11 (8) ◽  
pp. 3630
Author(s):  
Muhammad Abdullah ◽  
Nazam Ali ◽  
Charitha Dias ◽  
Tiziana Campisi ◽  
Muhammad Ashraf Javid
Keyword(s):  
Public Transport ◽  
Close Contact ◽  
Policy Implications ◽  
Developing Regions ◽  
Infected People ◽  
The Public ◽  
Policy Interventions ◽  
Study Results ◽  
Precautionary Measures ◽  
Safety Guidelines

Public transport use has drastically declined during the COVID-19 pandemic because the virus spreads through close contact with infected people and contaminated surfaces, especially in closed-environments. Evidence suggests that following the necessary safety guidelines can limit the spread of the virus, however, non-compliance to precautionary measures has been reported widely. Ignoring the precautionary measures may lead to quick transmission of the virus since public transport vehicles generally resemble closed-environments. This study explores people’s intentions to use public transport during the COVID-19 pandemic while adhering to precautionary measures. For this purpose, a total of 1516 useable responses were collected through a questionnaire survey conducted in Lahore, Pakistan. Regression models were developed to model the intentions to use public transport during the pandemic, to adhere to the precautionary measures while using public transport during the pandemic, and to use public transport while suffering from COVID-19 disease. The results of this study will help in understanding the intentions of the public transport users during the COVID-19 pandemic. It will also provide insights for policymakers and public transport operators about further necessary actions to promote safe public transport use during the current and any possible future pandemics. As public transport use declined during the pandemic, policy implications for alternative mobility options such as demand-responsive-transport (DRT) are also presented. Considering the study results, a policy interventions framework is proposed to promote the safe use of various public transport modes, particularly in developing regions.

scholarly journals Effect of COVID-19 on childhood Mycoplasma pneumoniae infection in Chengdu, China

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ying Zhang ◽  
Yijie Huang ◽  
Tao Ai ◽  
Jun Luo ◽  
Hanmin Liu
Keyword(s):  
Public Health ◽  
Mycoplasma Pneumoniae ◽  
Close Contact ◽  
Serum Antibody ◽  
Pathogen Transmission ◽  
Western China ◽  
Public Health Response ◽  
The Public ◽  
Health Response ◽  
The Impact

Abstract Background Following the outbreak of the COVID-19 pandemic, a change in the incidence and transmission of respiratory pathogens was observed. Here, we retrospectively analyzed the impact of COVID-19 on the epidemiologic characteristics of Mycoplasma pneumoniae infection among children in Chengdu, one of the largest cities of western China. Method M. pneumoniae infection was diagnosed in 33,345 pediatric patients with respiratory symptoms at the Chengdu Women’s & Children’s Central Hospital between January 2017 and December 2020, based on a serum antibody titer of ≥1:160 measured by the passive agglutination assay. Differences in infection rates were examined by sex, age, and temporal distribution. Results Two epidemic outbreaks occurred between October-December 2017 and April-December 2019, and two infection peaks were detected in the second and fourth quarters of 2017, 2018, and 2019. Due to the public health response to COVID-19, the number of positive M. pneumoniae cases significantly decreased in the second quarter of 2020. The number of M. pneumoniae infection among children aged 3–6 years was higher than that in other age groups. Conclusions Preschool children are more susceptible to M. pneumoniae infection and close contact appears to be the predominant factor favoring pathogen transmission. The public health response to COVID-19 can effectively control the transmission of M. pneumoniae.

Psychological impact on people Due to Pandemic of Covid-19 in selected Areas of Mumbai

2021 ◽  
pp. 541-551
Author(s):  
Christine Michael
Keyword(s):  
Close Contact ◽  
Psychological Impact ◽  
Educational Status ◽  
Family Type ◽  
Practical Significance ◽  
Housing Type ◽  
Chi Square ◽  
Psychological States ◽  
The Public ◽  
The People

Coronavirus disease 2019 (COVID-19) is defined as an illness caused by a novel coronavirus, now called Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2; formerly called 2019-nCoV). COVID-19 is an emerging respiratory infection that was first discovered in December 2019, in Wuhan city, Hubei Province, China.1 The 2019-nCoV has close similarity to bat coronaviruses, and it has been postulated that bats are the primary source. While the origin of the 2019-nCoV is still being investigated, current evidence suggests spread to humans occurred via transmission from wild animals illegally sold in the Huainan Seafood Wholesale Market.2 SARS-CoV-2 belongs to the larger family of ribonucleic acid (RNA) viruses, leading to infections, from the common cold, to more serious diseases, such as Middle East Respiratory Syndrome (MERS-CoV) and Severe Acute Respiratory Syndrome (SARS-CoV).1 The main symptoms of COVID-19 have been identified as fever, dry cough, fatigue, myalgia, shortness of breath, and dyspnoea.1 COVID-19 is characterized by rapid transmission, and can occur by close contact with an infected person.1 COVID-19 has spread widely and rapidly, from Wuhan city, to other parts of the world, threatening the lives of many people 1. By the end of January 2020, the World Health Organization (WHO) announced a public health emergency of international concern and called for the collaborative effort of all countries, to prevent its rapid spread. Later, the WHO declared COVID-19 a “global pandemic” 1. It is mainly transmitted through respiratory and close contact, which leads to the phenomenon of clustering infection in families and hospitals. Because of the sudden nature of the outbreak and the infectious power of the virus, it will inevitably cause people anxiety, depression and other stress reactions.3 It is necessary to understand and investigate the public psychological states during this tumultuous time.3 The results of the survey are of great practical significance to the information provision, cognition, behavior guidance and psychological support of governments at all levels.3 Understanding and investigating the public psychological states during this tumultuous time is of practical significance.3 Social and family attention and mental health support are essential. 3However, we think that the psychological impact of this pandemic like stress and anxiety among the general population is also a grave concern. Hence, this study attempted to find the psychological impact of COVID 19 on people in selected areas in Mumbai. Objectives: (1) To assess the psychological impact on people due to the pandemic of COVID-19 (2) To find the association between psychological impact and their selected demographic variables (age, gender, religion, marital status, educational status, occupation, family type, income, area of residence, and housing type). Review of literature: 3 sections (1) Studies related to psychological impact of COVID 19 on general population (2) Studies related to psychological impact of COVID 19 on health professionals (3) Studies related to psychological impact of COVID 19 on students. The Conceptual framework for the study was based on Health Promotion Model. Methodology: The Research Design used was descriptive study. The sample size was 200 people from selected areas of Mumbai. The samples were selected by using snow ball method. The data were collected by using self- administered 4 point Likert scale which was developed by the investigators. The tool was validated by 5 experts. Reliability was established by split half method. (r = 0.8). The main study was conducted in selected areas of Mumbai. The data collected were tabulated, analysed and interpreted using statistical test such as chi square. Findings of the study: The findings of the study revealed that there was severe psychological impact due to the pandemic of COVID-19 among the people. There was no significant association between psychological impact and age, sex, religion, marital status, family type, income, area of residence, and housing type except educational status and occupation which were significant (chi square values 21.03) for the psychological impact on the people and the rest of the demographic variables are found to be non-significant. Conclusion: The study concluded by stating the fact that, the psychological impact of people due to the pandemic of covid-19 was severe. The findings, recommendation and conclusion were stated adequately.

The Arab Agricultural Revolution and Its Diffusion, 700–1100

1974 ◽  
Vol 34 (1) ◽  
pp. 8-35 ◽  
Author(s):  
Andrew M. Watson
Keyword(s):  
West Africa ◽  
Labor Force ◽  
Urban Growth ◽  
Agricultural Production ◽  
Eleventh Century ◽  
Islamic World ◽  
Agricultural Revolution ◽  
Rapid Spread ◽  
Early Islamic ◽  
Close Contacts

The rapid spread of Islam into three continents in the seventh and eighth centuries was followed by the diffusion of an equally remarkable but less well documented agricultural revolution. Originating mainly in India, where heat, moisture and available crops all favored its development and where it had been practiced for some centuries before the rise of Islam, the new agriculture was carried by the Arabs or those they conquered into lands which, because they were colder and drier, were much less hospitable to it and where it could be introduced only with difficulty. It appeared first in the eastern reaches of the early-Islamic world—in parts of Persia, Mesopotamia and perhaps Arabia Felix—which had close contacts with India and where a few components of the revolution were already in place in the century before the rise of Islam. By the end of the eleventh century it had been transmitted across the length and breadth of the Islamic world and had altered, often radically, the economies of many regions: Transoxania, Persia, Mesopotamia, the Levant, Egypt, the Maghrib, Spain, Sicily, the savannah lands on either side of the Sahara, parts of West Africa and the coastlands of East Africa. It had very far-reaching consequences, affecting not only agricultural production and incomes but also population levels, urban growth, the distribution of the labor force, linked industries, cooking and diet, clothing, and other spheres of life too numerous and too elusive to be investigated here.

scholarly journals PUBLIC KNOWLEDGE, PRACTICES AND ATTITUDES TOWARDS COVID-19 IN AFGHANISTAN

2020 ◽  
Vol 6 (4) ◽  
pp. 104-115
Author(s):  
Sayeed Naqibullah Orfan ◽  
Abdul Hamid Elmyar
Keyword(s):  
Marital Status ◽  
Online Survey ◽  
Close Contact ◽  
Public Knowledge ◽  
Place Of Residence ◽  
Community Members ◽  
Negative Attitudes ◽  
The Public ◽  
Knowledge And Attitudes ◽  
The Impact

Background: COVID-19 has tremendously affected the world including Afghanistan since its outbreak.Objective: This study aimed to investigate the public knowledge about COVID-19 in Afghanistan as well as practices used to prevent contracting the disease. It also studied the attitudes of the public towards the COVID-19 survivors, and the impact of the participants’ gender, place of residence and marital status on their responses.Method: The data were collected from 1472 individuals through an online survey questionnaire. SPSS version 24.0 was used to analyze the data.Results: The findings showed that the public were very knowledgeable about COVID-19. They used various practices to varying extent to prevent contracting COVID-19 and its spread. Moreover, the participants’ attitudes towards the COVID-19 survivors varied. They had negative attitudes towards them if close contact was concerned, but their attitudes were positive towards them if close contact was not involved, e.g., educating community members about the disease. Gender and place of residence had a significant impact on the participants’ knowledge and practices, but they did not affect their attitudes towards the survivors. Furthermore, marital status significantly affected the participants’ practices, but it did not have any impact on their knowledge and attitudes towards the survivors.

scholarly journals Efficacy and Safety of Lianhuaqingwen Capsules for the Prevention of Coronavirus Disease 2019: A Prospective Open-Label Controlled Trial

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Xiaowei Gong ◽  
Boyun Yuan ◽  
Yadong Yuan ◽  
Fengju Li
Keyword(s):  
Nucleic Acid ◽  
Treatment Group ◽  
Close Contact ◽  
Controlled Trial ◽  
Control Group ◽  
Open Label ◽  
Medical Observation ◽  
Observation Period ◽  
Close Contacts ◽  
Nucleic Acid Tests

Coronavirus disease 2019 (COVID-19) has become a global pandemic. Community and close contact exposures continue to drive the COVID-19 pandemic. There is no confirmed effective treatment for suspected cases and close contacts. Lianhuaqingwen (LH) capsules, a repurposed Chinese herbal product that is currently on the market, have proven effective for influenza and COVID-19. To determine the safety and efficacy of LH capsules for the prevention of COVID-19, we conducted a prospective open-label controlled trial of LH capsules on subjects who had close contact with people infected with COVID-19. Subjects received LH capsules (4 capsules, three times daily) or the usual medical observation for 14 days. The primary endpoint was the rate of positive nucleic acid tests of nasal and pharyngeal swabs during the quarantine medical observation period. We included 1976 patients, including 1101 in the treatment group and 875 in the control group. The rate of positive nucleic acid tests in the treatment group was significantly lower than that in the control group (0.27% vs. 1.14%, respectively; mean difference: −0.87%; 95% CI: −1.83 to −0.13; p = 0.0174 ) during the quarantine medical observation period (14 days). Among subjects with different close contact states, there was no significant difference in the rate of positive nucleic acid test results among close contacts in the treatment group and the control group (6.45% vs. 11.43%, respectively; p = 0.6762 ). Among secondary close contacts, the rate of positive nucleic acid tests in the treatment group was significantly lower than that in the control group (0.09% vs. 0.71%, respectively; p = 0.0485 ). No serious adverse events were reported. Taken together, and in light of the safety and effectiveness profiles, these results show that LH capsules can be considered to prevent the progression of COVID-19 after close contact with an infected person. This trial is registered with ChiCTR2100043012.

scholarly journals SARS-CoV-2 Immunoglobulin g (IgG) Kinetics in Healthcare Workers and Their Close Contacts Reduced Risk of Re-infection: South-East Asian Region

2021 ◽  
Author(s):  
Mradul Kumar Daga ◽  
Govind Mawari ◽  
Vijay Kumar Karra ◽  
Meghachandra Singh ◽  
Siddharth Chand ◽  
...  
Keyword(s):  
Immunoglobulin G ◽  
Healthcare Workers ◽  
Close Contact ◽  
Antibody Test ◽  
New Delhi ◽  
Igg Antibody ◽  
Symptomatic Infection ◽  
Medical College ◽  
Reduced Risk ◽  
Close Contacts

Abstract BackgroundSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for global pandemic, and it has caused more than 2.3 million deaths. Persistence and stability of immunoglobulin G (IgG) response after recovery from COVID-19 infection is still uncertain. MethodsWe performed a longitudinal cohort study in healthcare workers (HCW) and their close contacts (Non-HCW) with known resolved SARS-CoV-2 infection and undiagnosed infection at Maulana Azad Medical College and associated Lok Nayak hospital, New Delhi. Baseline IgG antibody titers was determined and the participants were followed over a period of six months. We also examined relationship between SARS-CoV-2 immunoglobulin G (IgG) response and new symptomatic infection in HCW and Non-HCW over time. Results176 (70.9%) healthcare workers and 72 (29.0%) non-healthcare workers were recruited from two cohorts. 82 subjects recovered from SARS-CoV-2 infection and 166 undiagnosed for the infection having history of close contact with COVID-19 patients were followed up for a median of 227 days (interquartile range, 166 to 202) after a positive IgG antibody test. In the recovered subjects 70.7% (58) were seropositive for first anti-spike IgG assay at baseline, followed by 80.0%, 90.6% and 82.6% at three visits respectively. In undiagnosed subjects 37.3% (62) were seropositive at baseline, followed by 70.9%, 75.8% and 82.2% respectively. Also, 46.8% (29) were asymptomatic with no symptoms of COVID-19 and were seropositive at baseline. However, presence of IgG antibodies was associated with substantial reduced risk of re-infection over the follow up duration.ConclusionOur data showed that the antibodies levels measured increased over the first three months and decreased slightly after that and remained at a plateau and relatively stable for at least a period of six months.

scholarly journals Colonisation with toxigenic Corynebacterium diphtheriae in a Scottish burns patient, June 2015

2015 ◽  
Vol 20 (49) ◽  
Author(s):  
Ashutosh Deshpande ◽  
Teresa Inkster ◽  
Kate Hamilton ◽  
David Litt ◽  
Norman Fry ◽  
...  
Keyword(s):  
Multilocus Sequence Typing ◽  
Close Contact ◽  
Hospital Staff ◽  
Corynebacterium Diphtheriae ◽  
Sequence Type ◽  
Close Contacts

On 12 June 2015, Corynebacterium diphtheriae was identified in a skin swab from a burns patient in Scotland. The isolate was confirmed to be genotypically and phenotypically toxigenic. Multilocus sequence typing of three patient isolates yielded sequence type ST 125. The patient was clinically well. We summarise findings of this case, and results of close contact identification and screening: 12 family and close contacts and 32 hospital staff have been found negative for C. diphtheriae.

scholarly journals Review of the evidence for the use of erythromycin in the management of persons exposed to pertussis

1998 ◽  
Vol 120 (2) ◽  
pp. 143-149 ◽  
Author(s):  
H. DODHIA ◽  
E. MILLER
Keyword(s):  
Close Contact ◽  
Cell Vaccine ◽  
Inclusion Criteria ◽  
Vulnerable Children ◽  
Secondary Transmission ◽  
Randomized Controlled ◽  
Analytical Studies ◽  
Whole Cell Vaccine ◽  
Close Contacts

We assessed the quality of evidence for the use of erythromycin in preventing secondary transmission of pertussis to close contacts of primary cases. A literature search was undertaken and identified papers were reviewed critically. Thirteen original papers and 1 manuscript met the inclusion criteria for review (3 randomized controlled trials, 4 analytical studies and 7 descriptive studies). Evidence from both experimental and analytical studies showed little effect of the use of erythromycin in preventing secondary transmission. Its effect is at best modest when compared with the protection conferred by use of good quality whole cell vaccine. Three studies reported adverse events with erythromycin prophylaxis; these were mainly nausea, vomiting and abdominal pain. In countries where effective pertussis vaccines are in use, erythromycin use should be confined to close contacts of cases, particularly unimmunized children or partially immunized infants who would be most susceptible to the complications of pertussis, or adults who come into close contact with vulnerable children.

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