Browsing by Author "Uyar M."

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    Nutritional risk of hospitalized patients in Turkey
    (2009) Korfali G.; Gündoǧdu H.; Aydintuǧ S.; Bahar M.; Besler T.; Moral A.R.; Oǧuz M.; Sakarya M.; Uyar M.; Kiliçturgay S.
    Background & aims: We conducted a multicentre study to assess nutritional risk at hospital admission, hospital-associated iatrogenic malnutrition and the status of nutritional support in Turkish hospitals. Methods: A database which allowed for online submission of hospital and patient data was developed. A nutritional risk screening system (NRS-2002) was applied to all patients and repeated weekly in patients with hospital stays greater than one week and no invasive procedures. Patient-specific nutritional support was recorded during the study period. Results: Thirty-four hospitals from 19 cities contributed data from 29,139 patients. On admission, 15% of patients had nutritional risk. Nutritional risk was common (52%) in intensive care unit patients and lowest (3.9%) in otorhinolaryngology patients. Only 51.8% of patients with nutritional risk received nutritional support. Nutritional risk was present in 6.25% of patients at the end of the first week and 5.2% at the end of the second week, independent of nutritional support. In patients with nutritional risk on admission who were hospitalized for two weeks and received nutritional support, the NRS-2002 score remained ≥3 in 83% of cases. Conclusions: Nutritional risk is common in hospitalized Turkish patients. While patients at nutritional risk often do not receive nutritional support when hospitalized, nutritional risk occurs independent of nutritional support. © 2009 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism.
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    Review on the Eyedrop Self-Instillation Techniques and Factors Affecting These Techniques in Glaucoma Patients
    (Hindawi Limited, 2016) Kayikcioglu O.; Bilgin S.; Uyar M.
    Objective. This study aims to evaluate eyedrop self-installation techniques and factors affecting these techniques in glaucoma patients. Methods. Researchers directly observed eyedrop instillation procedures of 66 glaucoma patients. Contact with periocular tissues and instillation onto ocular surface or conjunctival fornices were considered. Correlations of instillation patterns with patient characteristics including age, gender, intraocular pressure, cup-to-disc ratio, visual field loss, and total intake of glaucoma medication and handgrip strength score were searched. Results. The average handgrip strength in the instillation without periocular contact group was 66.4 ± 19.7 kg, while the average handgrip strength score was 55.9 ± 20.9 kg in the instillation with contact group. The difference between the two groups was statistically significant (p = 0.039). No statistically significant correlation was found between handgrip strength and the mean number of glaucoma medications, c/d, intraocular pressure (p > 0.05). Also there was no significant relation between mean handgrip strength score and the severity of the visual field defect (p = 0.191). Conclusion. Patients especially with severe glaucomatous damage should be adequately instructed about the proper techniques for self-instillation of eyedrops and motivated to use a proper technique. Also, it is possible to suggest that patients with a higher handgrip strength, indicating the well-being of general health, may be doing better in properly instilling glaucoma eyedrops. © 2016 Ozcan Kayikcioglu et al.
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    Experimental Active Vibration Control of a Highly Flexible Composite Manipulator with Acceleration Feedback
    (Springer Science and Business Media Deutschland GmbH, 2022) Uyar M.; Malgaca L.; Lök Ş.İ.; Can S.V.
    In this study, vibration control of a single-link flexible smart composite manipulator (FSCM) is experimentally studied. The experimental system includes a real-time data acquisition control card, accelerometer, amplifier, servo motor, and driver. The FSCM is an epoxy-glass composite manipulator with the piezoelectric actuator and has the orientation of [0/90] lay-up. Modal analysis is experimentally conducted to find the natural frequencies by applying a chirp signal to the piezoelectric actuator. Natural frequencies are found by taking the Fast Fourier Transform (FFT) in MATLAB. Triangular motion profiles are used to drive the FSCM. Motion parameters are found by utilizing the natural frequencies of the system for different deceleration times (tdec). with different deceleration times (tdec). Residual vibrations are suppressed by using PID control with acceleration feedback. The acceleration signals at the tip point are measured by utilizing the accelerometer. The controller gains are determined with the trial and error method. Experimental residual vibration results are presented for the active control. It is observed that the suppression of vibration amplitudes further increases with active control. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.