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Hassanien, Mohammad M.,Mortada, Wael I.,Hassan, Ali M.,El-Asmy, Ahmed A. Korean Chemical Society 2012 대한화학회지 Vol.56 No.6
New series of metal complexes of Co(II), Ni(II), Cu(II), Zn(II), Pd(II) and Pt(II) with 4-(p-chlorophenyl)-1-(pyridin-2-yl)thiosemicarbazide (HCPTS) have been synthesized and characterized by elemental analyses, magnetic moment, spectra (IR, UV-Vis, $^1H$ NMR, mass and ESR) and thermal studies. The IR data suggest different coordination modes for HCPTS which behaves as a monobasic bidentate with all metal ions except Cu(II) and Zn(II) which acts as a monobasic tridentate. Based on the electronic and magnetic studies, Co(II), Cu(II), Pd(II) and Pt(II) complexes have square - planner, Ni(II) has mixed stereochemistry (tetrahedral + square planar), while Zn(II) is tetrahedral. Molar conductance in DMF solution indicates the non-ionic nature of the complexes. The ESR spectra of solid copper(II) complex show $g_{\parallel}$ (2.2221) > $g_{\perp}$ (2.0899) > 2.0023 indicating square-planar structure and the presence of the unpaired electron in the $d_x2_{-y}2$ orbital with significant covalent bond character. The thermal stability and degradation kinetics of the ligand and its metal complexes were studied by TGA and DTA and the kinetic parameters were calculated using Coats-Redfern and Horowitz-Metzger methods. The complexes have more antibacterial activity against some bacteria than the free ligand. However, the ligand has high anticancer activities against HCT116 (human colon carcinoma cell line) and HEPG2 (human liver hepatocellular carcinoma cell line) compared with its complexes.
Autonomous Driving Path Planning based on Sarsa-Dyna Algorithm
Aboul Ella Hassanien,Jennefer Mononteliza 사단법인 미래융합기술연구학회 2020 아시아태평양융합연구교류논문지 Vol.6 No.7
In autonomous driving path planning, ensuring the computational efficiency and safety of planning is an important issue. The Dyna framework in reinforcement learning can solve the problem of planning efficiency. At the same time, the Sarsa algorithm in reinforcement learning can be effective in guaranteeing the safety of path planning. This paper proposes a path planning algorithm based on Sarsa-Dyna for autonomous driving, which effectively guarantees the efficiency and safety of path planning. The results show that the number of steps planned in advance is proportional to the convergence speed of the reinforcement learning algorithm. The Sarsa-Dyna will be proposed. The analysis of convergence speed and collision times has been done between the proposed Sarsa-Dyna, Q-learning, Sarsa and Dyna-Q algorithm. The proposed Sarsa-Dyna algorithm can reduce the number of collisions effectively, ensure safety during driving, and at the same time ensure convergence speed.
GLOBAL STABILITY OF HIV INFECTION MODELS WITH INTRACELLULAR DELAYS
Elaiw, Ahmed,Hassanien, Ismail,Azoz, Shimaa Korean Mathematical Society 2012 대한수학회지 Vol.49 No.4
In this paper, we study the global stability of two mathematical models for human immunodeficiency virus (HIV) infection with intra-cellular delays. The first model is a 5-dimensional nonlinear delay ODEs that describes the interaction of the HIV with two classes of target cells, $CD4^+$ T cells and macrophages taking into account the saturation infection rate. The second model generalizes the first one by assuming that the infection rate is given by Beddington-DeAngelis functional response. Two time delays are used to describe the time periods between viral entry the two classes of target cells and the production of new virus particles. Lyapunov functionals are constructed and LaSalle-type theorem for delay differential equation is used to establish the global asymptotic stability of the uninfected and infected steady states of the HIV infection models. We have proven that if the basic reproduction number $R_0$ is less than unity, then the uninfected steady state is globally asymptotically stable, and if the infected steady state exists, then it is globally asymptotically stable for all time delays.
Global stability of HIV infection models with intracellular delays
Ahmed Elaiw,Ismail Hassanien,Shimaa Azoz 대한수학회 2012 대한수학회지 Vol.49 No.4
In this paper, we study the global stability of two mathemat-ical models for human immunodeciency virus (HIV) infection with intra-cellular delays. The rst model is a 5-dimensional nonlinear delay ODEs that describes the interaction of the HIV with two classes of target cells,CD4+ T cells and macrophages taking into account the saturation infec-tion rate. The second model generalizes the rst one by assuming that the infection rate is given by Beddington-DeAngelis functional response. Two time delays are used to describe the time periods between viral entry the two classes of target cells and the production of new virus particles. Lyapunov functionals are constructed and LaSalle-type theorem for delay differential equation is used to establish the global asymptotic stability of the uninfected and infected steady states of the HIV infection models. We have proven that if the basic reproduction number R0 is less than unity, then the uninfected steady state is globally asymptotically stable,and if the infected steady state exists, then it is globally asymptotically stable for all time delays.
Single-use endoscopes: A narrative review
Maged Tharwat Elghannam,Moataz Hassan Hassanien,Yosry Abdelrahman Ameen,Gamal Mohammed Elattar,Ahmed Ali El Ray,Emad Abdel Wahab Turky,Mohammed Darwish El Talkawy 소화기인터벤션의학회 2022 International journal of gastrointestinal interven Vol.11 No.1
The transmission of infections through gastrointestinal endoscopy is a vital issue. The main problem lies in the use of duodenoscopes due to mechanical aspects of the scope design. Even with high-level disinfection, sterilization of the scope can fail. Hence, the Food and Drug Administration has encouraged a shift to single-use endoscopes. Available options include endoscopes with single-use components (mainly single-use endcaps), fully single-use duodenoscopes (SUDs), and even those with a disposable elevator mechanism. Clinical trials revealed that both reusable and single-use scopes have the same efficacy, while single-use scopes have benefits in terms of infection control, economic considerations, and ease of reprocessing. A few drawbacks are left to be dealt with. Reusable duodenoscopes with removable/disposable endcaps are satisfactory except in specific situations where SUDs are better to use.
Single-use endoscopes: A narrative review
Maged Tharwat Elghannam,Moataz Hassan Hassanien,Yosry Abdelrahman Ameen,Gamal Mohammed Elattar,Ahmed Ali El Ray,Emad Abdel Wahab Turky,Mohammed Darwish El Talkawy 소화기인터벤션의학회 2022 Gastrointestinal Intervention Vol.11 No.1
The transmission of infections through gastrointestinal endoscopy is a vital issue. The main problem lies in the use of duodenoscopes due to mechanical aspects of the scope design. Even with high-level disinfection, sterilization of the scope can fail. Hence, the Food and Drug Administration has encouraged a shift to single-use endoscopes. Available options include endoscopes with single-use components (mainly single-use endcaps), fully single-use duodenoscopes (SUDs), and even those with a disposable elevator mechanism. Clinical trials revealed that both reusable and single-use scopes have the same efficacy, while single-use scopes have benefits in terms of infection control, economic considerations, and ease of reprocessing. A few drawbacks are left to be dealt with. Reusable duodenoscopes with removable/disposable endcaps are satisfactory except in specific situations where SUDs are better to use.
Adel Mohamad Ali Assiri,Mohamed F.R. Hassanien 한국식품영양과학회 2013 Journal of medicinal food Vol.16 No.11
Health promoting cold pressed oils may improve human health and prevent certain diseases. It is hard to find any research concerning the composition and functional properties of cold pressed clove (Syzygium aromaticum) oil (CO). Cold pressed CO was evaluated for its lipid classes, fatty acid profiles, and tocol contents. In addition, antiradical and antimicrobial properties of CO were evaluated. The amounts of neutral lipids in CO was the highest (*94.7% of total lipids), followed by glycolipids and phospholipids. The main fatty acids in CO were linoleic and oleic, which comprise together *80% of total fatty acids. Stearic and palmitic acids were the main saturated fatty acids. a- and c-tocopherols and d-tocotrienol were the main detected tocols. CO had higher antiradical action against DPPH and galvinoxyl radicals than virgin olive oil. The results of antimicrobial properties revealed that CO inhibited the growth of all tested microorganisms. CO had a drastic effect on the biosynthesis of proteins and lipids in cells of Bacillus subtilis. In consideration of potential utilization, detailed knowledge on the composition and functional properties of CO is of major importance.