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  1. Article ; Online: Coronaviruses disinfection of a mobile object by a germicidal UVC lamp.

    Guettari, Moez

    European physical journal plus

    2022  Volume 137, Issue 9, Page(s) 1007

    Abstract: The aim of the present work is to study the disinfection of a mobile object by UVGI lamps. Two different disinfection processes are examined: the stationary and dynamic disinfection. In the stationary process, the infected object moves and takes its ... ...

    Abstract The aim of the present work is to study the disinfection of a mobile object by UVGI lamps. Two different disinfection processes are examined: the stationary and dynamic disinfection. In the stationary process, the infected object moves and takes its place under the lamp during a stationary exposure time,
    Language English
    Publishing date 2022-09-06
    Publishing country Germany
    Document type Journal Article
    ISSN 2190-5444
    ISSN (online) 2190-5444
    DOI 10.1140/epjp/s13360-022-03180-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: COVID-19 multiwaves as multiphase percolation: a general N-sigmoidal equation to model the spread.

    El Aferni, Ahmed / Guettari, Moez / Hamdouni, Abdelkader

    European physical journal plus

    2023  Volume 138, Issue 5, Page(s) 393

    Language English
    Publishing date 2023-05-08
    Publishing country Germany
    Document type Journal Article
    ISSN 2190-5444
    ISSN (online) 2190-5444
    DOI 10.1140/epjp/s13360-023-04014-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: UVC disinfection robot

    Guettari, Moez / Gharbi, Ines / Hamza, Samir

    Environmental science and pollution research. 2021 Aug., v. 28, no. 30

    2021  

    Abstract: The aim of the present work is to contribute in the fight against the spread of Covid-19, a novel human coronavirus, in hospitals, public transport, airlines, and any enclosed areas. In this study, we have adopted the physical disinfection method by ... ...

    Abstract The aim of the present work is to contribute in the fight against the spread of Covid-19, a novel human coronavirus, in hospitals, public transport, airlines, and any enclosed areas. In this study, we have adopted the physical disinfection method by using UVC light as agent. The UVC devices are studied and classified according their disinfectant units, complementary devices, combined disinfection agents, mobilities, and order types. Our finding shows that a mobile robot is the most efficient device to inactivate microorganisms, so we have developed a robot called i-Robot UVC. The robot is equipped with eight UVC lamps around a central column and two lamps on the top. The column is fixed on a mobile base where several sensors are integrated to measure temperature and humidity on the one hand, and on the other, to detect motion plus position and to avoid obstacles. The robot can estimate automatically the disinfection time while monitored by Wi-Fi connection from a phone or a tablet. I-Robot UVC disinfects rooms and equipment with ultraviolet light, and shuts down when humans are around to keep them safe. The robot can kill 99,999% bacteria and various through UVC lamps led. The innovative robot UVC was patented under the number TN2020/0063.
    Keywords COVID-19 infection ; Orthocoronavirinae ; disinfectants ; disinfection ; equipment ; humans ; humidity ; pollution ; public transportation ; research ; temperature ; ultraviolet radiation ; wireless technology
    Language English
    Dates of publication 2021-08
    Size p. 40394-40399.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-020-11184-2
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 5915: Show issues

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  4. Article ; Online: Mathematical model of Boltzmann's sigmoidal equation applicable to the spreading of the coronavirus (Covid-19) waves.

    El Aferni, Ahmed / Guettari, Moez / Tajouri, Tahar

    Environmental science and pollution research international

    2020  Volume 28, Issue 30, Page(s) 40400–40408

    Abstract: Currently, investigations are intensively conducted on modeling, forecasting, and studying the dynamic spread of coronavirus (Covid-19) new pandemic. In the present work, the sigmoidal-Boltzmann mathematical model was applied to study the Covid-19 spread ...

    Abstract Currently, investigations are intensively conducted on modeling, forecasting, and studying the dynamic spread of coronavirus (Covid-19) new pandemic. In the present work, the sigmoidal-Boltzmann mathematical model was applied to study the Covid-19 spread in 15 different countries. The cumulative number of infected persons I has been accurately fitted by the sigmoidal-Boltzmann equation (SBE), giving rise to different epidemiological parameters such as the pandemic peak t
    MeSH term(s) COVID-19 ; Forecasting ; Humans ; Models, Theoretical ; Pandemics ; SARS-CoV-2
    Keywords covid19
    Language English
    Publishing date 2020-10-15
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-020-11188-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  5. Article: Disinfection Technology in Hospitals: Harmful effects of UVC.

    Gharbi, Ines / Guettari, Moez / Chroudi, Amira / Touati, Houcine / Hamza, Samir

    La Tunisie medicale

    2021  Volume 98, Issue 6, Page(s) 434–441

    Abstract: Ultraviolet C (UVC) disinfection is an effective technique for inactivating bacteria and viruses, while being non-corrosive to medical equipment. It is therefore very useful for hospitals. However, the handling of this type of radiation without ... ...

    Abstract Ultraviolet C (UVC) disinfection is an effective technique for inactivating bacteria and viruses, while being non-corrosive to medical equipment. It is therefore very useful for hospitals. However, the handling of this type of radiation without precaution presents a potentially significant danger for the human health. This hazard can manifested immediately or after a long period, by harmful effects ranging from simple erythema to authentic skin cancers. Therefore restrictions should be imposed to control and avoid the risks involved in professional uses. For this reason, the limit values for exposure to UVC radiation have been specified and recommended by the International Commission on Non-Ionizing Radiation Protection (ICNIRP).
    MeSH term(s) Disinfection ; Hospitals ; Humans ; Skin Neoplasms ; Technology ; Ultraviolet Rays/adverse effects
    Language English
    Publishing date 2021-01-21
    Publishing country Tunisia
    Document type Journal Article
    ZDB-ID 128627-4
    ISSN 0041-4131
    ISSN 0041-4131
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 223: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  6. Article ; Online: UVC disinfection robot.

    Guettari, Moez / Gharbi, Ines / Hamza, Samir

    Environmental science and pollution research international

    2020  Volume 28, Issue 30, Page(s) 40394–40399

    Abstract: The aim of the present work is to contribute in the fight against the spread of Covid-19, a novel human coronavirus, in hospitals, public transport, airlines, and any enclosed areas. In this study, we have adopted the physical disinfection method by ... ...

    Abstract The aim of the present work is to contribute in the fight against the spread of Covid-19, a novel human coronavirus, in hospitals, public transport, airlines, and any enclosed areas. In this study, we have adopted the physical disinfection method by using UVC light as agent. The UVC devices are studied and classified according their disinfectant units, complementary devices, combined disinfection agents, mobilities, and order types. Our finding shows that a mobile robot is the most efficient device to inactivate microorganisms, so we have developed a robot called i-Robot UVC. The robot is equipped with eight UVC lamps around a central column and two lamps on the top. The column is fixed on a mobile base where several sensors are integrated to measure temperature and humidity on the one hand, and on the other, to detect motion plus position and to avoid obstacles. The robot can estimate automatically the disinfection time while monitored by Wi-Fi connection from a phone or a tablet. I-Robot UVC disinfects rooms and equipment with ultraviolet light, and shuts down when humans are around to keep them safe. The robot can kill 99,999% bacteria and various through UVC lamps led. The innovative robot UVC was patented under the number TN2020/0063.
    MeSH term(s) COVID-19 ; Disinfection ; Humans ; Robotics ; SARS-CoV-2 ; Ultraviolet Rays
    Keywords covid19
    Language English
    Publishing date 2020-10-14
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-020-11184-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 5915: Show issues

    Order via subito

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  7. Article: Mathematical model of Boltzmann’s sigmoidal equation applicable to the spreading of the coronavirus (Covid-19) waves

    El Aferni, Ahmed / Guettari, Moez / Tajouri, Tahar

    Environmental science and pollution research. 2021 Aug., v. 28, no. 30

    2021  

    Abstract: Currently, investigations are intensively conducted on modeling, forecasting, and studying the dynamic spread of coronavirus (Covid-19) new pandemic. In the present work, the sigmoidal-Boltzmann mathematical model was applied to study the Covid-19 spread ...

    Abstract Currently, investigations are intensively conducted on modeling, forecasting, and studying the dynamic spread of coronavirus (Covid-19) new pandemic. In the present work, the sigmoidal-Boltzmann mathematical model was applied to study the Covid-19 spread in 15 different countries. The cumulative number of infected persons I has been accurately fitted by the sigmoidal-Boltzmann equation (SBE), giving rise to different epidemiological parameters such as the pandemic peak tₚ, the maximum number of infected persons Iₘₐₓ, and the time of the epidemic stabilization t∞. The time constant relative to the sigmoid Δt (called also the slope factor) was revealed to be the determining parameter which influences all the epidemiological parameters. Empirical laws between the different parameters allowed us to propose a modified sigmoidal-Boltzmann equation describing the spread of the pandemic. The expression of the spread speed Vₚ was further determined as a function of the sigmoid parameters. This made it possible to assess the maximum speed of spread of the virus Vₚₘₐₓ and to trace the speed profile in each country. In addition, for countries undergoing a second pandemic wave, the cumulative number of infected people I has been successfully adjusted by a double sigmoidal-Boltzmann equation (DSBE) allowing the comparison between the two waves. Finally, the comparison between the maximum virus spread of two waves Vₚ ₘₐₓ ₁ and Vₚ ₘₐₓ ₂ showed that the intensity of the second wave of Covid-19 is low compared to the first for all the countries studied.
    Keywords COVID-19 infection ; equations ; mathematical models ; pandemic ; people ; pollution ; research ; viruses
    Language English
    Dates of publication 2021-08
    Size p. 40400-40408.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-020-11188-y
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 5915: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  8. Article: UVC disinfection robot

    Guettari, Moez / Gharbi, Ines / Hamza, Samir

    Abstract: The aim of the present work is to contribute in the fight against the spread of Covid-19, a novel human coronavirus, in hospitals, public transport, airlines, and any enclosed areas. In this study, we have adopted the physical disinfection method by ... ...

    Abstract The aim of the present work is to contribute in the fight against the spread of Covid-19, a novel human coronavirus, in hospitals, public transport, airlines, and any enclosed areas. In this study, we have adopted the physical disinfection method by using UVC light as agent. The UVC devices are studied and classified according their disinfectant units, complementary devices, combined disinfection agents, mobilities, and order types. Our finding shows that a mobile robot is the most efficient device to inactivate microorganisms, so we have developed a robot called i-Robot UVC. The robot is equipped with eight UVC lamps around a central column and two lamps on the top. The column is fixed on a mobile base where several sensors are integrated to measure temperature and humidity on the one hand, and on the other, to detect motion plus position and to avoid obstacles. The robot can estimate automatically the disinfection time while monitored by Wi-Fi connection from a phone or a tablet. I-Robot UVC disinfects rooms and equipment with ultraviolet light, and shuts down when humans are around to keep them safe. The robot can kill 99,999% bacteria and various through UVC lamps led. The innovative robot UVC was patented under the number TN2020/0063.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #871535
    Database COVID19

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  9. Article: Mathematical model of Boltzmann's sigmoidal equation applicable to the spreading of the coronavirus (Covid-19) waves

    El Aferni, Ahmed / Guettari, Moez / Tajouri, Tahar

    Abstract: Currently, investigations are intensively conducted on modeling, forecasting, and studying the dynamic spread of coronavirus (Covid-19) new pandemic. In the present work, the sigmoidal-Boltzmann mathematical model was applied to study the Covid-19 spread ...

    Abstract Currently, investigations are intensively conducted on modeling, forecasting, and studying the dynamic spread of coronavirus (Covid-19) new pandemic. In the present work, the sigmoidal-Boltzmann mathematical model was applied to study the Covid-19 spread in 15 different countries. The cumulative number of infected persons I has been accurately fitted by the sigmoidal-Boltzmann equation (SBE), giving rise to different epidemiological parameters such as the pandemic peak tp, the maximum number of infected persons Imax, and the time of the epidemic stabilization t∞. The time constant relative to the sigmoid Δt (called also the slope factor) was revealed to be the determining parameter which influences all the epidemiological parameters. Empirical laws between the different parameters allowed us to propose a modified sigmoidal-Boltzmann equation describing the spread of the pandemic. The expression of the spread speed Vp was further determined as a function of the sigmoid parameters. This made it possible to assess the maximum speed of spread of the virus Vpmax and to trace the speed profile in each country. In addition, for countries undergoing a second pandemic wave, the cumulative number of infected people I has been successfully adjusted by a double sigmoidal-Boltzmann equation (DSBE) allowing the comparison between the two waves. Finally, the comparison between the maximum virus spread of two waves Vp max 1 and Vp max 2 showed that the intensity of the second wave of Covid-19 is low compared to the first for all the countries studied.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #871536
    Database COVID19

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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