2,408 research outputs found
Effects of the Application Local Zoledronic Acid On Different Dental Implants in Rats On Osseointegration
No full textMuhammet Bahattin Bingul,1 Mehmet Gul,2 Serkan Dundar,3 Alihan Bozoglan,3 Mustafa Kirtay,4 Muhammet Fatih Ozupek,5 Erhan Cahit Ozcan,6 Osman Habek,1 Ismail Tasdemir7 1Department of Oral and Maxillofacial Surgery, Harran University, Faculty of Dentistry, Sanliurfa, Turkiye; 2Department of Periodontology, Harran University, Faculty of Dentistry, Sanliurfa, Turkiye; 3Department of Periodontology, Firat University, Faculty of Dentistry, Elazig, Turkiye; 4Private Practice, Oral and Maxillofacial Surgery, London, Ontario, Canada; 5Department of Oral and Maxillofacial Surgery, Firat University, Faculty of Dentistry, Elazig, Turkiye; 6Department of Plastic, Aesthetic and Reconstructive Surgery, Firat University, Faculty of Medicine, Elazig, Turkiye; 7Department of Periodontology, Karamanoglu Mehmet Bey University, Faculty of Dentistry, Karaman, TurkiyeCorrespondence: Muhammet Bahattin Bingul, Email [email protected]: Recently, a lot of research has been done around the world to popularize the osseointegration of dental implants. In this study, it was investigated the effect of local zoledronic acid application on implants with machined (MAC), resorbable blast materials (RBM), sandblasted and acid-etched (SLA) surface implants integrated in rat tibias.Methodology: A total of 60 female Wistar rats weighing between 270 and 300 g were used in the study. The rats were passing divided into six classes: controls; MAC (n = 10), RBM (n = 10), SLA (n = 10), and local zoledronic acid (LZA) applied groups; LZA-MAC (n = 10), LZA-RBM (n=10) and LZA-SLA (n = 10) and implants were surgically placement into rat tibias in general anesthesia. After a four-week experimental period, the biomechanical bone implant connection level was determined with reverse torque analysis.Results: Osseointegration levels were detected highly in SLA and RBM surface compared with the machined surfaced implants in both control and treatment groups (p < 0.05). Additionally, local application of zoledronic acid in both three groups; implants increased the biomechanic osseointegration level compared with the controls (p < 0.05).Conclusion: In this research, we observe that the local application of the zoledronic acid could increase the osseointegration, and RBM and SLA surface could be better than machined surfaced implants in terms of bone implant connection. In addition, local application of zoledronic acid may be a safer method than systemic application.Keywords: zoledronic acid, local application, osseointegration, bone implant linkage, bone implant contact, implant plan
The Effectiveness of Kinesiotaping, Sham Taping or Exercises Only in Lateral Epicondylitis Treatment: A Randomized Controlled Study
No full textBackground: Lateral epicondylitis is a common musculoskeletal condition presenting with pain and tenderness over the lateral epicondyle and dorsal forearm, pain and weakness in gripping and limitations in daily activities. It is proposed that kinesiotaping, a new application of adhesive taping, reduces pain and improves muscle function. Objective: To compare efficacy of kinesiotaping, sham taping, or exercises only in the treatment of lateral epicondylitis. Design: Double-blind, randomized, controlled trial. Setting: Tertiary medical center, university hospital. Participants: Thirty patients with lateral epicondylitis for less than 12weeks. Methods or Interventions: Patients were randomized into three groups: kinesiotaping plus exercises (n = 10), sham taping plus exercises (n = 10), and control (exercises only) (n = 10) groups. All recipients were provided a home exercise program including strengthening and stretching exercises. In kinesiotaping and sham taping groups, tapings were performed and changed every 3-4 d for 2 weeks. Main Outcome Measure(s): The primary outcome was the patient-rated tennis elbow evaluation (PRTEE). Pain visual analogue scale (VAS), grip strength, and the disabilities of the arm, shoulder and hand (QuickDASH) scales were secondary outcomes. Evaluations were done at baseline, posttreatment, and at 4 weeks after treatment. The immediate effect was also assessed by VAS and grip strength immediately after real and sham tapings. Results: PRTEE total scores at posttreatment and at 4 weeks after treatment were statistically significantly lower in kinesiotaping plus exercises group compared to sham taping plus exercises group and exercises only group. The effects of kinesiotaping were larger than sham taping and only exercises at posttreatment (d = -1.21, d = -1.33) and at 4 weeks after treatment (d = -1.39, d = -1.34). Repeated-measures anova showed a significant interaction between the time and the groups (F 2950 = 4849; P = .006). Significant between-group differences were found in QuickDASH score and VAS at rest at 4 weeks after treatment, VAS at daily activity at posttreatment and 4 weeks after treatment when kinesiotaping plus exercises and sham taping plus exercises groups and kinesiotaping plus exercises and exercises only groups were compared. Real taping but not sham taping immediately led to an increase in grip strength, decrease in VAS at rest and VAS at daily activity (P = .0017, P = .041, P = .028; respectively). Conclusions: Kinesiotaping in addition to exercises is more effective than sham taping and exercises only in improving pain in daily activities and arm disability due to lateral epicondylitis
Author Correction: A detailed map of Higgs boson interactions by the ATLAS experiment ten years after the discovery
No full textIn the version of this article initially published, the ATLAS Collaboration
author names, affiliations and acknowledgements were omitted and
have now been included in the HTML and PDF versions of the article
Implementation of an ant colony optimization - based PID controller for a microhydroelectric power plant
No full textThe goal of this study is to apply a newly developed algorithm known as the Ant-Colony Optimization Technique for PID controllers to a Microhydroelectric Power plant. Ant Colony Optimization is a new nature-inspired optimization technique used especially in combinatorial optimization problems (Bingul & Varol, 2004). A successful study conducted by Bingul and Varol showed that when the PID controllers were optimized with ant algorithm, desired response could be achieved. It also provides a global optimum solution for PID controller design problems. Presented with these advantages the realization of the identified method in the control system of the micro hydroelectric power plant has now become more appealing. Basically, this is a pioneering study in controlling the output of a Micro hydroelectric power plant. The system interfaces the generator output to the control system which contains the ACO, PID controller and the motor that will direct the valve according to the received control signal. The program is performed using the software MATLAB and the actual simulations and test runs is applied on a sample Microhydoelectric powerplant located at 1st floor Miguel Building of De La Salle University-Manila. Load application for most microhydroelectric power plant varies its output voltage causing an insufficient supply or overloading to most electronic equipment. These occurrences can damage the devices that utilize the power plant especially when not maintained. The implementation of Ant Colony Optimization technique will be able manipulates the valve of the micro hydro system to obtain the desired output in whatever loading condition it might encounter. To measure the efficiency of the system, a cost function was utilized, in this case, the Suyama, to compare with output and simulations done in the experiments using the Ant Colony optimization technique and eventually yielded favorable result
Validity and reliability of the Turkish version of the hand-use-at-home questionnaire for children with unilateral cerebral palsy and neonatal brachial plexus palsy
No full textPurpose: To translate the Hand-Use-at-Home questionnaire (HUH), assesses the amount of spontaneous use of the affected hand in children with 18 bimanual activities, into Turkish and examine its validity and reliability on children with neonatal brachial plexus palsy (NBPP) or unilateral cerebral palsy (UCP). Materials and methods: The HUH was translated and cross-culturally adapted to Turkish and administered to children with NBPP (n = 25) and UCP (n = 42) between 3 and 10 years. The psychometric analyses included reliability by internal consistency (Cronbach’s alpha) and test/retest reliability (intraclass correlation coefficient, ICC) structural validity was evaluated with exploratory factor analysis, and construct validity was investigated by matching the HUH with the Pediatric Outcome Data Collection Instrument Upper Extremity Scale (PODCI) (NBPP only), and Children’s Hand-Use Experience Questionnaire (CHEQ) (UCP only). Results: HUH showed excellent test–retest reliability (ICC2,1 = 0.988 Cl (0.977–0.992)), excellent internal consistency (Cronbach’s-α = 0.989), and moderate correlation with CHEQ (rs = 0.558) in UCP and high correlation with PODCI Scale (rs = 0.789) in NBPP group. The HUH had low and moderate correlation respectively lesion-extent levels (r=-0.457) in NBPP and 5 Manual Ability Classification System levels (r=-0.688) in the UCP group. Conclusion: The HUH is a valid and reliable tool to assess the amount of spontaneous use of the affected hand in Turkish children with NBPP and UCP
A real-time prediction model of electrode extension for GMAW
No full textThis paper presents the development of an electrode extension model for the gas metal arc welding process based on the process voltage. The full dynamic model for the electrode extension is derived by combining a dynamic resistivity model with the voltage model. The electrode extension model was found to be represented mathematically by a nonlinear, time-varying, second-order ordinary differential equation. This model can be used in through-the-arc sensing and are length control systems. To experimentally verify the model, the process dynamics were excited by a continuous sinusoidal variation of arc current. Using a constant current power source with the electrode positive, sinusoidal perturbations of variable amplitude were superimposed on the current to allow direct measurement of changes in electrode extension, arc length, and total voltage. A high-speed video system was used to capture the experimental electrode extension dynamics. The model was verified by comparing the frequency response of the model to the frequency response of the real process. Agreement between the simulations and the experimental results was found to be very good. The accuracy of this model was found to be approximately +/- 0.6 mm, which is considered to be suitable for process control applications
A New PID Tuning Technique Using Differential Evolution for Unstable and Integrating Processes with Time Delay
No full textFuzzy impedance and force control of a Stewart platform
No full textA new, simple, and effective control method is proposed for the position-based impedance and force control of a Stewart platform (SP). The control approach can be divided into 3 parts, namely position control in free space, impedance control in contact, and force control. An impedance filter is developed to achieve the desired behavior between the position and force. The gain of the filter is modified by a fuzzy logic proportional-integral-derivative controller. Kinematic and dynamic models of the SP are simulated in a MATLAB/Simulink environment. Several real-time experiments are conducted with the SP developed in our laboratory. The results of the simulations and real-time experiments are compared to show the effectiveness of the proposed method. The experimental results demonstrate that the position control of the SP in Cartesian space is achieved at up to precision of 0.5 mu m and 0.43 mu degrees in linear and rotational motions, respectively, and force control of the SP is obtained successfully with a range of between 1 N and 50 N. Steady-state force errors are also eliminated with an intelligent integrator
ATLAS TRT and its Performance at LHC
No full textThe ATLAS Transition Radiation Tracker (TRT) is the outermost of the three sub-systems of the ATLAS Inner Detector at the Large Hadron Collider at CERN. It consists of close to 300000 thin-wall drift tubes (straws) providing on average 30 two-dimensional space points with 0.12-0.15 mm resolution for charged particle tracks with |eta| 0.5 GeV. Along with continuous tracking, it provides particle identification capability through the detection of transition radiation X-ray photons generated by high velocity particles in the many polymer fibers or films that fill the spaces between the straws. Custom-built analog and digital electronics is optimized to operate as luminosity increases to the LHC design. In this talk, a review of the commissioning and first and current operational experience of the TRT detector and its performance at LHC will be presented. Emphasis will be given to performance studies based on the reconstruction and analysis of LHC collisions. A comparison of the TRT response and the particle identification in pp and Pb-Pb collisions will be presented. The results are also compared with the expected performance
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