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  1. Article ; Online: Symmetry preserving nonlinear observer for attitude estimation with magnetometer only.

    Sabzevari, Sanaz / Arvan, Mohammad Reza / Vali, Ahmad Reza / Dehghan, S M Mehdi / Ferdowsi, Mohammad H

    ISA transactions

    2020  Volume 102, Page(s) 314–324

    Abstract: This paper addresses designing a nonlinear symmetry observer for nano-satellite attitude determination with only Three-Axis Magnetometer (TAM). Hence, two nested filters are delineated to compensate for the lack of data and to solve the observability ... ...

    Abstract This paper addresses designing a nonlinear symmetry observer for nano-satellite attitude determination with only Three-Axis Magnetometer (TAM). Hence, two nested filters are delineated to compensate for the lack of data and to solve the observability problem. In the first filter, the magnetic field derivative is estimated by the extended Kalman filter. Subsequently, the magnetic field and its derivative are applied in the second filter. The proposed methodology relies on invariant observers under the action of a Lie group to estimate the attitude and angular velocity simultaneously. Later, the invariant error dynamic equations are utilized in designing the observer. Consequently, the desired performance of this proposed observer tuned by periodic Riccati differential equation is validated through both simulation and exponential stability proof.
    Language English
    Publishing date 2020-03-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2012746-7
    ISSN 1879-2022 ; 0019-0578
    ISSN (online) 1879-2022
    ISSN 0019-0578
    DOI 10.1016/j.isatra.2020.03.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Ultrasonic treatment of CoFe

    Maleki, Ali / Aghaei, Morteza / Hafizi-Atabak, Hamid Reza / Ferdowsi, Mohammad

    Ultrasonics sonochemistry

    2017  Volume 37, Page(s) 260–266

    Abstract: New hybrid magnetic composite nanostructure are prepared via ultrasonic treatment by glass-ceramic method, characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), energy- ... ...

    Abstract New hybrid magnetic composite nanostructure are prepared via ultrasonic treatment by glass-ceramic method, characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), energy-dispersive X-ray (EDX), element distribution image (EDX mapping), thermal gravimetric analysis (TGA)/differential thermal analysis (DTA) and N
    Language English
    Publishing date 2017-07
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1208333-1
    ISSN 1873-2828 ; 1350-4177
    ISSN (online) 1873-2828
    ISSN 1350-4177
    DOI 10.1016/j.ultsonch.2017.01.022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4441: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  3. Article ; Online: Application of a nanostructured supramolecular solvent for the microextraction of diphenylamine and its mono-nitrated derivatives from unburned single-base propellants.

    Ferdowsi, Mohammad / Taghian, Abolfazl / Najafi, Asghar / Moradi, Morteza

    Journal of separation science

    2015  Volume 38, Issue 2, Page(s) 276–282

    Abstract: A supramolecular solvent made up of nano-sized inverted hexagonal aggregates of 1-octanol is proposed for the microextraction of diphenylamine and its mono-nitrated derivatives in unburned single-base propellants. The procedure included the extraction of ...

    Abstract A supramolecular solvent made up of nano-sized inverted hexagonal aggregates of 1-octanol is proposed for the microextraction of diphenylamine and its mono-nitrated derivatives in unburned single-base propellants. The procedure included the extraction of sub-gram quantities (30 mg) of homogenized propellant with 1.5 mL of the supramolecular solvent. Several conditions affecting extraction efficiency, for example the concentrations of the major components of the supramolecular solvent (tetrahydrofuran and alkanol), alkanol type, solvent pH, and extraction time, were investigated and optimized. The main forces for the microextraction of analytes in the nanostructured supramolecular solvent include both dispersion and hydrogen bond interactions. This mixed-mode mechanism resulted in high extraction efficiencies reaching low method detection limits (0.005-0.012 mg/g) without the need for extract evaporation. Under the optimum conditions, recoveries in samples ranged between about 82.6 and 98.7%. Compared to the reference method, the proposed method is simple and rapid, delivering accurate and precise results, and can be applied for routine determination of diphenylamine and its derivatives in propellants. The precision of the method, expressed as relative standard deviation, was about 4.3-10.9%.
    Language English
    Publishing date 2015-01
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2047990-6
    ISSN 1615-9314 ; 1615-9306
    ISSN (online) 1615-9314
    ISSN 1615-9306
    DOI 10.1002/jssc.201401023
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Application of a nanostructured supramolecular solvent for the microextraction of diphenylamine and its mono‐nitrated derivatives from unburned single‐base propellants

    Ferdowsi, Mohammad / Taghian, Abolfazl / Najafi, Asghar / Moradi, Morteza

    Journal of separation science. 2015 Jan., v. 38, no. 2

    2015  

    Abstract: A supramolecular solvent made up of nano‐sized inverted hexagonal aggregates of 1‐octanol is proposed for the microextraction of diphenylamine and its mono‐nitrated derivatives in unburned single‐base propellants. The procedure included the extraction of ...

    Abstract A supramolecular solvent made up of nano‐sized inverted hexagonal aggregates of 1‐octanol is proposed for the microextraction of diphenylamine and its mono‐nitrated derivatives in unburned single‐base propellants. The procedure included the extraction of sub‐gram quantities (30 mg) of homogenized propellant with 1.5 mL of the supramolecular solvent. Several conditions affecting extraction efficiency, for example the concentrations of the major components of the supramolecular solvent (tetrahydrofuran and alkanol), alkanol type, solvent pH, and extraction time, were investigated and optimized. The main forces for the microextraction of analytes in the nanostructured supramolecular solvent include both dispersion and hydrogen bond interactions. This mixed‐mode mechanism resulted in high extraction efficiencies reaching low method detection limits (0.005–0.012 mg/g) without the need for extract evaporation. Under the optimum conditions, recoveries in samples ranged between about 82.6 and 98.7%. Compared to the reference method, the proposed method is simple and rapid, delivering accurate and precise results, and can be applied for routine determination of diphenylamine and its derivatives in propellants. The precision of the method, expressed as relative standard deviation, was about 4.3–10.9%.
    Keywords detection limit ; diphenylamine ; evaporation ; hydrogen bonding ; microextraction ; pH ; solvents ; tetrahydrofuran
    Language English
    Dates of publication 2015-01
    Size p. 276-282.
    Publishing place Wiley-VCH
    Document type Article
    ZDB-ID 2047990-6
    ISSN 1615-9314 ; 1615-9306
    ISSN (online) 1615-9314
    ISSN 1615-9306
    DOI 10.1002/jssc.201401023
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: The role of spiritual intelligence in predicting the empathy levels of nurses with COVID-19 patients.

    Aliabadi, Parastoo Karimi / Zazoly, Atefeh Zabihi / Sohrab, Mehrnoush / Neyestani, Farkhondeh / Nazari, Nahid / Mousavi, Seyed Hassan / Fallah, Abolghasem / Youneszadeh, Majid / Ghasemiyan, Masoumeh / Ferdowsi, Mohammad

    Archives of psychiatric nursing

    2021  Volume 35, Issue 6, Page(s) 658–663

    Abstract: Aim: Given the prolongation of the newly emerging COVID-19 pandemic and the significance of caring for the patients by nursing staff, investigating and planning for the different psychological dimensions of this group is of paramount importance. Hence, ... ...

    Abstract Aim: Given the prolongation of the newly emerging COVID-19 pandemic and the significance of caring for the patients by nursing staff, investigating and planning for the different psychological dimensions of this group is of paramount importance. Hence, this study investigated the role of spiritual intelligence in predicting nurses' empathizing with COVID-19 patients.
    Methods: This descriptive-correlation study was conducted in 2021 on nurses caring for COVID-19 patients in three public hospitals. The researchers used two standard questionnaires, including the Jefferson Scale of Empathy (JSE) and Spiritual Intelligence (SI), for data collection. The collected data were analyzed in SPSS16 using descriptive statistics and the following: The Mann-Whitney U test, Kruskal-Wallis test, Regression, chi-square test, and Pearson and Spearman correlations.
    Results: The statistical population consisted of 338 nurses with an average age of 34 and ten years of work experience. There was a significant positive relationship between the empathy scores and spiritual intelligence scores of the nurses caring for COVID-19 patients (P < 0.05). It was also concluded from the regression analysis that, spiritual intelligence affect empathy. Mean score of empathy was higher in hospitals where more nursing staff had MSc degrees. There was a significant difference between the empathy scores of the three hospitals (P < 0.05).
    Conclusion: The results indicated that there is a positive relationship between empathy and spiritual intelligence. Therefor improving spiritual intelligence is the appropriate strategy to ameliorate empathy during the COVID19 pandemic. At the same time, study indicated attention to the issue of nurses' mental health. Hence, it was suggested to incorporate these issues in the training programs and national/international decisions.
    MeSH term(s) Adult ; COVID-19 ; Empathy ; Humans ; Intelligence ; Pandemics ; SARS-CoV-2 ; Surveys and Questionnaires
    Language English
    Publishing date 2021-10-24
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 639197-7
    ISSN 1532-8228 ; 0883-9417
    ISSN (online) 1532-8228
    ISSN 0883-9417
    DOI 10.1016/j.apnu.2021.10.007
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2271: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

    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.

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