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  1. Article: An SIR epidemic model for COVID-19 spread with fuzzy parameter: the case of Indonesia.

    Abdy, Muhammad / Side, Syafruddin / Annas, Suwardi / Nur, Wahyuddin / Sanusi, Wahidah

    Advances in difference equations

    2021  Volume 2021, Issue 1, Page(s) 105

    Abstract: The aim of this research is to construct an SIR model for COVID-19 with fuzzy parameters. The SIR model is constructed by considering the factors of vaccination, treatment, obedience in implementing health protocols, and the corona virus-load. Parameters ...

    Abstract The aim of this research is to construct an SIR model for COVID-19 with fuzzy parameters. The SIR model is constructed by considering the factors of vaccination, treatment, obedience in implementing health protocols, and the corona virus-load. Parameters of the infection rate, recovery rate, and death rate due to COVID-19 are constructed as a fuzzy number, and their membership functions are used in the model as fuzzy parameters. The model analysis uses the generation matrix method to obtain the basic reproduction number and the stability of the model's equilibrium points. Simulation results show that differences in corona virus-loads will also cause differences in the transmission of COVID-19. Likewise, the factors of vaccination and obedience in implementing health protocols have the same effect in slowing or stopping the transmission of COVID-19 in Indonesia.
    Language English
    Publishing date 2021-02-11
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2132815-8
    ISSN 1687-1847 ; 1687-1839
    ISSN (online) 1687-1847
    ISSN 1687-1839
    DOI 10.1186/s13662-021-03263-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: PENERAPAN ANALISIS DISKRIMINAN DALAM PENGELOMPOKAN DESA MISKIN DI KABUPATEN WAJO

    Suwardi Annas / Irwan Irwan

    Scientific Pinisi, Vol 1, Iss

    2016  Volume 1

    Abstract: Jenis penelitian ini adalah penelitian eksplorasi yang bertujuan untuk mengelompokkan objek dengan menggunakan metode pengelompokan Two Step Cluster (TSC) sebagai pengelompokan awal terhadap objek penelitian (desa/kelurahan) berdasarkan variabel ... ...

    Abstract Jenis penelitian ini adalah penelitian eksplorasi yang bertujuan untuk mengelompokkan objek dengan menggunakan metode pengelompokan Two Step Cluster (TSC) sebagai pengelompokan awal terhadap objek penelitian (desa/kelurahan) berdasarkan variabel pencirinya. Selanjutnya dilakukan analisis Diskriminan untuk memperjelas hasil pengelompokan dan interpretasi hasil TSC. Data sekunder y ang digunakan dalam penelitian ini berupa dokumentasi tertulis dan identifikasi peubah yang digunakan tentang desa/kelurahan di kabupaten Wajo provinsi Sulawesi Selatan adalah data Potensi Desa (PODES) tahun 2014 yaitu: X1 (jumlah penduduk), X2 (keluarga tani), X3 (keluarga buruh tani), X4 (keluarga pengguna listrik), X5 (fasilitas pendidikan), X6 (tenaga kesehatan), X7 (kematian penduduk). Objek dalam terapan penelitian ini adalah seluruh desa/kelurahan di kabupaten Wajo. Tahapan analisis data yang dilakukan yaitu (1) melakukan pengelompokan awal dengan metode TSC terhadap data-data yang diperoleh berdasarkan variabel yang ditentukan, (2) melakukan analisis Diskriminan terhadap hasil pengelompokan TSC untuk memperjelas hasil pengelompokan TSC. Hasil penelitian diperoleh bahwa desa/kelurahan yang tergolong desa miskin dengan kriteria: rendahnya persentase rumah tangga yang menggunakan listrik, rendahnya keikutsertaan penduduk usia sekolah, rendahnya kepadatan penduduk, tingkat kematian yang tinggi, banyaknya anggota rumah tangga tani, tingginya persentase rumah tangga buruh pertanian.
    Keywords Science ; Q ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
    Language Indonesian
    Publishing date 2016-08-01T00:00:00Z
    Publisher Universitas Negeri Makassar
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Stability analysis and numerical simulation of SEIR model for pandemic COVID-19 spread in Indonesia.

    Annas, Suwardi / Isbar Pratama, Muh / Rifandi, Muh / Sanusi, Wahidah / Side, Syafruddin

    Chaos, solitons, and fractals

    2020  Volume 139, Page(s) 110072

    Abstract: The Aim of this research is construct the SEIR model for COVID-19, Stability Analysis and numerical simulation of the SEIR model on the spread of COVID-19. The method used to construct the model is the SEIR model by considering vaccination and isolation ... ...

    Abstract The Aim of this research is construct the SEIR model for COVID-19, Stability Analysis and numerical simulation of the SEIR model on the spread of COVID-19. The method used to construct the model is the SEIR model by considering vaccination and isolation factors as model parameters, the analysis of the model uses the generation matrix method to obtain the basic reproduction numbers and the global stability of the COVID-19 distribution model. Numerical simulation models use secondary data on the number of COVID-19 cases in Indonesia. The results obtained are the SEIR model for COVID-19; model analysis yields global stability from the spread of COVID-19; The results of the analysis also provide information if no vaccine, Indonesia is endemic COVID-19. Then the simulation results provide a prediction picture of the number of COVID-19 in Indonesia in the following days, the simulation results also show that the vaccine can accelerate COVID-19 healing and maximum isolation can slow the spread of COVID-19. The results obtained can be used as a reference for early prevention of the spread of COVID-19 in Indonesia.
    Keywords covid19
    Language English
    Publishing date 2020-07-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 2003919-0
    ISSN 1873-2887 ; 0960-0779
    ISSN (online) 1873-2887
    ISSN 0960-0779
    DOI 10.1016/j.chaos.2020.110072
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Stability analysis and numerical simulation of SEIR model for pandemic COVID-19 spread in Indonesia

    Annas, Suwardi / Isbar Pratama, Muh. / Rifandi, Muh. / Sanusi, Wahidah / Side, Syafruddin

    Chaos, Solitons & Fractals

    2020  Volume 139, Page(s) 110072

    Keywords General Mathematics ; covid19
    Language English
    Publisher Elsevier BV
    Publishing country us
    Document type Article ; Online
    ZDB-ID 2003919-0
    ISSN 1873-2887 ; 0960-0779
    ISSN (online) 1873-2887
    ISSN 0960-0779
    DOI 10.1016/j.chaos.2020.110072
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Spatial EBLUP dalam Pendugaan Area Kecil

    Muhammad Nusrang / Suwardi Annas / Asfar Asfar / Hastuty Hastuty / Jajang Jajang

    Sainsmat, Vol 6, Iss 1, Pp 59-

    2018  Volume 66

    Abstract: Empirical Best Linear Unbiased Prediction (EBLUP) merupakan salah satu metode dalam pendugaan area kecil. Asumsi yang digunakan dalam EBLUP adalah bahwa pengaruh acak galat area saling bebas. Namun dalam beberapa kasus, asumsi ini sering dilanggar. ... ...

    Abstract Empirical Best Linear Unbiased Prediction (EBLUP) merupakan salah satu metode dalam pendugaan area kecil. Asumsi yang digunakan dalam EBLUP adalah bahwa pengaruh acak galat area saling bebas. Namun dalam beberapa kasus, asumsi ini sering dilanggar. Penyebabnya adalah keragaman suatu area dipengaruhi area sekitarnya, sehingga pengaruh spasial dapat dimasukkan ke dalam pengaruh acak. Akibat pelanggaran ini menyebabkan penduga EBLUP menjadi bias dan memiliki ragam yang besar. Solusi untuk mengatasi hal tersebut adalah dengan memasukkan informasi pengaruh spasial ke dalam model. Pendugaan area kecil yang memperhatikan pengaruh acak spasial area dikenal dengan istilah penduga Spatial Empirical Best Linear Unbiased Prediction (SEBLUP). Penduga SEBLUP memberikan pendugaan yang lebih baik dibandingkan dengan penduga EBLUP dengan membandingkan nilai ARRMSE dari masing-masing metode pendugaan.
    Keywords Education (General) ; L7-991 ; Science (General) ; Q1-390
    Language Indonesian
    Publishing date 2018-05-01T00:00:00Z
    Publisher Universitas Negeri Makassar
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: New naphthoquinone derivatives from

    Supratman, Unang / Hirai, Nami / Sato, Shiho / Watanabe, Keiko / Malik, Abdul / Annas, Suwardi / Harneti, Desi / Maharani, Rani / Koseki, Takuya / Shiono, Yoshihito

    Natural product research

    2019  Volume 35, Issue 9, Page(s) 1406–1412

    Abstract: Two new naphthoquinone derivatives, 6-hydroxy-astropaquinone B ( ...

    Abstract Two new naphthoquinone derivatives, 6-hydroxy-astropaquinone B (
    MeSH term(s) Anti-Infective Agents/chemistry ; Anti-Infective Agents/pharmacology ; Bacteria/drug effects ; Carbon-13 Magnetic Resonance Spectroscopy ; Fungi/drug effects ; Fusarium/chemistry ; Lactuca/drug effects ; Microbial Sensitivity Tests ; Naphthoquinones/chemistry ; Naphthoquinones/isolation & purification ; Naphthoquinones/pharmacology ; Proton Magnetic Resonance Spectroscopy ; Rhizophoraceae/microbiology
    Chemical Substances Anti-Infective Agents ; Naphthoquinones ; astropaquinone B
    Language English
    Publishing date 2019-08-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 2185747-7
    ISSN 1478-6427 ; 1478-6419
    ISSN (online) 1478-6427
    ISSN 1478-6419
    DOI 10.1080/14786419.2019.1650358
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: New naphthoquinone derivatives from Fusarium napiforme of a mangrove plant

    Supratman, Unang / Hirai, Nami / Sato, Shiho / Watanabe, Keiko / Malik, Abdul / Annas, Suwardi / Harneti, Desi / Maharani, Rani / Koseki, Takuya / Shiono, Yoshihito

    Natural product research. 2021 May 3, v. 35, no. 9

    2021  

    Abstract: Two new naphthoquinone derivatives, 6-hydroxy-astropaquinone B (1) and astropaquinone D (2) as well as the known compound 3-O-methyl-9-O-methylfusarubin (3) were isolated from Fusarium napiforme, an endophytic fungus isolated from the mangrove plant, ... ...

    Abstract Two new naphthoquinone derivatives, 6-hydroxy-astropaquinone B (1) and astropaquinone D (2) as well as the known compound 3-O-methyl-9-O-methylfusarubin (3) were isolated from Fusarium napiforme, an endophytic fungus isolated from the mangrove plant, Rhizophora mucronata. The structures of 1 and 2 were determined by 1D and 2D NMR spectroscopic analyses. Compounds 1, 2 and 3 exhibited moderate antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa. Furthermore, 1, 2 and 3 were phytotoxic action in lettuce seeding at a concentration of 30 μg · mL⁻¹.
    Keywords Fusarium ; Pseudomonas aeruginosa ; Rhizophora mucronata ; Staphylococcus aureus ; antibacterial properties ; endophytes ; fungi ; lettuce ; naphthoquinones ; phytotoxicity ; research
    Language English
    Dates of publication 2021-0503
    Size p. 1406-1412.
    Publishing place Taylor & Francis
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2185747-7
    ISSN 1478-6427 ; 1478-6419
    ISSN (online) 1478-6427
    ISSN 1478-6419
    DOI 10.1080/14786419.2019.1650358
    Database NAL-Catalogue (AGRICOLA)

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  8. Article: Stability analysis and numerical simulation of SEIR model for pandemic COVID-19 spread in Indonesia

    Annas, Suwardi / Isbar Pratama, Muh. / Rifandi, Muh. / Sanusi, Wahidah / Side, Syafruddin

    Chaos Solitons Fractals

    Abstract: The Aim of this research is construct the SEIR model for COVID-19, Stability Analysis and numerical simulation of the SEIR model on the spread of COVID-19. The method used to construct the model is the SEIR model by considering vaccination and isolation ... ...

    Abstract The Aim of this research is construct the SEIR model for COVID-19, Stability Analysis and numerical simulation of the SEIR model on the spread of COVID-19. The method used to construct the model is the SEIR model by considering vaccination and isolation factors as model parameters, the analysis of the model uses the generation matrix method to obtain the basic reproduction numbers and the global stability of the COVID-19 distribution model. Numerical simulation models use secondary data on the number of COVID-19 cases in Indonesia. The results obtained are the SEIR model for COVID-19; model analysis yields global stability from the spread of COVID-19; The results of the analysis also provide information if no vaccine, Indonesia is endemic COVID-19. Then the simulation results provide a prediction picture of the number of COVID-19 in Indonesia in the following days, the simulation results also show that the vaccine can accelerate COVID-19 healing and maximum isolation can slow the spread of COVID-19. The results obtained can be used as a reference for early prevention of the spread of COVID-19 in Indonesia
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #628256
    Database COVID19

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  9. Article ; Online: Stability analysis and numerical simulation of SEIR model for pandemic COVID-19 spread in Indonesia

    Annas, Suwardi / Pratama, Muh. Isbar / Rifandi, Muh. / Sanusi, Wahidah / Side, Syafruddin

    reponame:Expeditio Repositorio Institucional UJTL ; instname:Universidad de Bogotá Jorge Tadeo Lozano

    2020  

    Abstract: The Aim of this research is construct the SEIR model for COVID-19, Stability Analysis and numerical simulation of the SEIR model on the spread of COVID-19. The method used to construct the model is the SEIR model by considering vaccination and isolation ... ...

    Abstract The Aim of this research is construct the SEIR model for COVID-19, Stability Analysis and numerical simulation of the SEIR model on the spread of COVID-19. The method used to construct the model is the SEIR model by considering vaccination and isolation factors as model parameters, the analysis of the model uses the generation matrix method to obtain the basic reproduction numbers and the global stability of the COVID-19 distribution model. Numerical simulation models use secondary data on the number of COVID-19 cases in Indonesia. The results obtained are the SEIR model for COVID-19; model analysis yields global stability from the spread of COVID-19; The results of the analysis also provide information if no vaccine, Indonesia is endemic COVID-19. Then the simulation results provide a prediction picture of the number of COVID-19 in Indonesia in the following days, the simulation results also show that the vaccine can accelerate COVID-19 healing and maximum isolation can slow the spread of COVID-19. The results obtained can be used as a reference for early prevention of the spread of COVID-19 in Indonesia
    Keywords SEIR model ; COVID-19 ; Simulation model ; Basic reproduction number ; Lyapunov function ; Síndrome respiratorio agudo grave ; SARS-CoV-2 ; Coronavirus ; covid19
    Publisher Chaos, Solitons and Fractals
    Publishing country co
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article: Meroterpenoids produced by Pseudocosmospora sp. Bm-1-1 isolated from Acanthus ebracteatus Vahl

    Nakamura, Tomoki / Suzuki, Takuma / Rudianto Ariefta, Nanang / Koseki, Takuya / Aboshi, Takako / Murayama, Tetsuya / Widiyantoro, Ari / Kurniatuhadi, Rikhsan / Malik, Abdul / Annas, Suwardi / Harneti, Desi / Maharani, Rani / Supratman, Unang / Abe, Junpei / Kurisawa, Naoaki / Kimura, Ken-ich / Shiono, Yoshihito

    Phytochemical Society of Europe Phytochemistry letters. 2019 June, v. 31

    2019  

    Abstract: Fractionation of ethyl acetate extract obtained by culturing the endophytic fungus Pseudocosmospora sp. Bm-1-1 resulted in the isolation of four new meroterpenoids, cosmosporin A (1), 6-carboxy-cosmosporin A (2), rel-(6aS,10aR)-Δ9- ... ...

    Abstract Fractionation of ethyl acetate extract obtained by culturing the endophytic fungus Pseudocosmospora sp. Bm-1-1 resulted in the isolation of four new meroterpenoids, cosmosporin A (1), 6-carboxy-cosmosporin A (2), rel-(6aS,10aR)-Δ9-tetrahydrocannabiorcolic acid B (3) and 8′-hydroxy-cannabiorcichromenic acid (4), in addition to four known compounds 5–8. Structures were elucidated by spectral analysis, as well as by directly comparing the spectral data of new compounds with those of known compounds. Cannabiorcichromenic acid (5), decarboxy-cannabiorcichromenic acid (6), and rel-(6aS,10aR)-decarboxy-Δ9-tetrahydrocannabiorcolic acid B (8) restored growth of a Saccharomyces cerevisiae mutant strain involving Ca2+ signal transduction. Furthermore, compounds 3 and 8 had cytotoxic activity against HL60 cells (3: IC50 = 24.1 μM and 8: IC50 1.6 μM).
    Keywords Acanthus ; Nectriaceae ; Saccharomyces cerevisiae ; acids ; cytotoxicity ; endophytes ; ethyl acetate ; fractionation ; fungi ; inhibitory concentration 50 ; mutants ; signal transduction ; spectral analysis ; terpenoids
    Language English
    Dates of publication 2019-06
    Size p. 85-91.
    Publishing place Elsevier Ltd
    Document type Article
    ISSN 1874-3900
    DOI 10.1016/j.phytol.2019.03.014
    Database NAL-Catalogue (AGRICOLA)

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