22 research outputs found

    Orthonormal Basis Functions for Continuous-Time Systems: Completeness and L_p -Convergence

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    In this paper, model sets for continuous--time linear time invariant systems that are spanned by fixed pole orthonormal bases are investigated. These bases generalise the well known Laguerre and Kautz bases. It is shown that the obtained model sets are complete in all of the Hardy spaces H p (\Pi); 1 p ! 1 and the right half plane algebra A(\Pi) provided that a mild condition on the choice of basis poles is satisfied. As a further extension, the paper shows how orthonormal model sets, that are norm dense in H p (\Pi), 1 p ! 1 and which have a prescribed asymptotic order may be constructed. Finally, it is established that the Fourier series formed by orthonormal basis functions converge in all spaces H p (\Pi), 1 ! p ! 1. The results in this paper have application in system identification, model reduction and control system synthesis

    Orthonormal Basis Functions for Continuous-Time Systems and L_p Convergence

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    In this paper, model sets for continuous-time linear time invariant systems that are spanned by fixed pole orthonormal bases are investigated. These bases generalise the well known Laguerre and two-parameter Kautz cases. It is shown that the obtained model sets are norm dense in the Hardy space H 1 (#) under the same condition as previously derived by the authors for the norm denseness in the (# is the open right half plane) Hardy spaces H p (#), 1 < p < #

    PORPHYRAZINE IMMOBILIZATION ON POLYESTER FABRIC AND HETEROGENEOUS CATALYTIC APPLICATION ON OXIDATION OF 2-MERCAPTOETHANOL

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    The removal of the thiol compunds is very important in terms of the prevention of environmental pollution. Catalytic oxidation of 2-mercaptoethanol taking place on porphyrazine catalyst that has been immobilized on the fabric was investigated in this research. Experiments at different pH and temperature at five different concentrations of dissolved mercaptan was followed by continuously measuring the oxygen concentration in the solution. Obtained results are very well when compared to literature. Immobilization the porphyrazine on fabric by cationic dyeing process does not change the catalytic effect on the oxidation of 2-mercaptoethanol. So porphyrazines can be used by immobilization on the fabric by dyeing as catalysts

    Effect of Calcium Hydroxide and Double and Triple Antibiotic Pastes on the Bond Strength of Epoxy Resin-based Sealer to Root Canal Dentin

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    Introduction: The aim of this study was to evaluate the effects of calcium hydroxide (CH) and triple (TAP) and double (DAP) antibiotic pastes on the bond strength of an epoxy resin-based sealer (AH Plus Jet; Dentsply DeTrey, Konstanz, Germany) to the root canal dentin. Methods: Sixty-four single-rooted human mandibular premolars were decoronated and prepared using the rotary system to size 40. The specimens were randomly divided into a control group (without intracanal dressing) and 3 experimental groups that received an intracanal dressing with either CH, DAP, or TAP (n = 16). The intracanal dressing was removed by rinsing with 10 mL 17% EDTA followed by 10 mL 2.5% sodium hypochlorite. The root canals were then obturated with gutta-percha and AH Plus Jet sealer. A push-out test was used to measure the bond strength between the root canal dentin and the sealer. The data were analyzed using 2-way analysis of variance and Tukey post hoc tests to detect the effect of the independent variables (intracanal medicaments and root canal thirds) and their interactions on the push-out bond strength of the root canal filling material to the root dentin (P = .05). Results: The push-out bond strength values were significantly affected by the intracanal medicaments (P .05). In the middle and apical third, the bond strength of the TAP group was higher than those of the CH and DAP groups (P < .05). Conclusions: The DAP and CH did not affect the bond strength of the epoxy resin based sealer. Additionally, the TAP improved the bond strength of the epoxy resin-based sealer in the middle and apical thirds

    Total antioxidant capacity and total oxidant status of synovial fluids in patients with temporomandibular joint pain and dysfunction

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    Objectives The objective of this study was to investigate whether a relationship exists between total antioxidant capacity (TAC) and total oxidant status (TOS) of synovial fluids (SFs) of temporomandibular joint (TMJ) pain patients with pain and dysfunction

    Total antioxidant capacity and total oxidant status of synovial fluids in patients with temporomandibular joint pain and dysfunction

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    Objectives The objective of this study was to investigate whether a relationship exists between total antioxidant capacity (TAC) and total oxidant status (TOS) of synovial fluids (SFs) of temporomandibular joint (TMJ) pain patients with pain and dysfunction

    Agrobacterium tumefaciens-mediated genetic transformation of a recalcitrant grain legume, lentil (Lens culinaris Medik)

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    A simple and reproducible Agrobacterium-mediated transformation protocol for a recalcitrant legume plant, lentil (Lens culinaris M.) is reported. Application of wounding treatments and efficiencies of three Agrobacterium tumefaciens strains, EHA105, C58C1, and KYRT1 were compared for T-DNA delivery into lentil cotyledonary node tissues. KYRT1 was found to be on average 2.8-fold more efficient than both EHA105 and C58C1 for producing transient beta-glucuronidase (GUS) gene (gus) expression on cotyledonary petioles. Wounding of the explants, use of an optimized transformation protocol with the application of acetosyringone and vacuum infiltration treatments in addition to the application of a gradually intensifying selection regime played significant roles in enhancing transformation frequency. Lentil explants were transformed by inoculation with Agrobacterium tumefaciens strain, KYRT1 harboring a binary vector pTJK136 that carried neomycin phosphotransferase gene (npt-II) and an intron containing gusA gene on its T-DNA region. GUS-positive shoots were micrografted on lentil rootstocks. Transgenic lentil plants were produced with an overall transformation frequency of 2.3%. The presence of the transgene in the lentil genome was confirmed by GUS assay, PCR, RT-PCR and Southern hybridization. The transgenic shoots grafted on rootstocks were successfully transferred to soil and grown to maturity in the greenhouse. GUS activity was detected in vegetative and reproductive organs of T-0, T-1, T-2 and T-3 plants. PCR assays of T-1, T-2 and T-3 progenies confirmed the stable transmission of the transgene to the next generations

    Ipsilateral Rotational Autokeratoplasty for the Management of Traumatic Corneal Scar

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    A 40-years-old male patient with a corneal scar secondary to perforating eye injury had undergone ipsilateral rotational autokeratoplasty in our clinics. The corneal scar involved the pupillary area. The patient had a preoperative visual acuity of counting fingers. The patient’s cornea was trephined with a 0.5 mm temporal decentration. The 8.0 mm autograft was rotated approximately 180° to relocate the scar to the temporal aspect of the cornea. The final position of the corneal scar was temporal of the visual axis and central area was clear. The visual acuity at 1-, 3-, and 6-months followups was better than the first visual acuity in the patient. Ipsilateral rotational autokeratoplasty has many advantages over conventional keratoplasty. There is no risk of immunological rejection of the graft, postoperative corticosteroids are not needed as frequently, and donor cornea is not required. A rotational autograft can be a powerful alternative to conventional keratoplasty for some patients with traumatic corneal scars
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