493 research outputs found
Mary Georgi
Full text linkabstract: Mari Georgi left her village before it was attacked at the age of seven. She never witnessed the war but did hear about the attacks and the violence. On July 28, 2000 she came to the United States.
“Lost Boys Found” is an ongoing, interdisciplinary project that is collecting, recording and archiving the oral histories of the Lost Boys/Girls of Sudan. The collection is a work-in-progress, seeking to record the oral history of as many Lost Boys/Girls as are willing, and will be used in a future book.Age: 37Region: Southern SudanThis picture and bio was donated to the "Lost Boys Found" oral history project from The Arizona Lost Boys Cente
Eyelid tumors in children over a 10-year period
Full text linkIntroduction: Eyelid tumors in children are rare and, fortunately, mostly benign. Reconstruction after excision of these tumors is an extremely responsible procedure, considering the early age of the patient. Aim: To analyze the incidence and location of malignant and benign tumors in children up to 18 years of age over a period of 10 years. Materials and methods: We conducted a retrospective study of 29 eyes from a cohort of 450 eyes with tumors operated on in our clinic between 2010 and 2019. Of all tumors of the eye and adnexa, only tumors of the eyelids were considered. All tumors were histopathologically examined after their surgical removal. Results: Eyelid tumors in children account for 6.4% of the tumors studied in all age groups, and 0.2% of them are malignant. The ratio of women to men is 62% to 38%, with most of them residing in cities. The most common eyelid tumors in children are cysts (47%), followed by papillomas (17%) and nevi (10%). The distribution on the eyelid is as follows: medially located 31%, centrally 45% and temporally 24%. Conclusion: Eyelid tumors in children prefer the female sex. Malignant tumors of the eyelids are rare. The average size of tumors is about 4-6 mm. The duration of the disease directly correlates with the size of the tumor. For tumors of the lower eyelid, a doctor is consulted earlier than for tumors of the upper eyelid. Inflammatory reaction around the tumor is more common in the right eye
Fault Prognosis of Electric Powertrains using Deep Learning Approaches
No full textAuthor Georgi DambolovMasterarbeit Johannes Kepler Universität Linz 202
Vuk and Georgi: An adventure into active systems via mechatronics, robotics and manufacturing engineering
No full textDimirovski, Georgi M. (Dogus Author) -- Conference full title: 2013 IEEE 11th International Symposium on Intelligent Systems and Informatics (SISY) 26-28 Sept. 2013, Subotica, SerbiaThe last century's ending quarter was marked by an dramatically dynamic development of new technologies and practical realizations of diverse technical constructions in various fields of engineering, in general, and in robotics, in particular. However, such growth of new technological achievements was not accompanied always with the necessary caution steps and protection measures against possible breakdown and destructions, which in specific cases and under certain conditions could be disastrous. In this talk commemorating Academician Vukobratovic and drawing from his endeavors on the so-called active systems and research he shared with me as well as our academic cooperation during the last decade of his active work, while examining some advantages, his merits for the entire field are pointed in here out to the best author's abilities. Some active systems such as adaptation for active noise and machine vibration control via active damping by force feedback as well as mobile robotic unmanned air and underwater vehicles as well as platoon of ground vehicles are note considered. Rather focus is put on active controls of earthquake induced vibrations and high-rise structures, manufacturing processes, wheeled mobile manipulators and walking humanoid robots are discussed in more detail while on homing missiles are only mentioned. In due course, some solutions to contact task in dynamic environment that are linked with active systems are also touched upon
Complications and Recurrences after Excision and Reconstruction of Eyelid Tumours
No full textIntroduction: The eyelids are a common site for skin tumours and account for 5–10% of all skin tumours. Treatment is mainly surgical and aims to preserve the anatomical structure of the eyelid, its function and not least its aesthetic appearance. Aim: Presentation of recurrence and complication rates of tumour-related eyelid surgery in a cohort of 450 tumours. Results: Analysis of a cohort of 450 tumours operated on revealed 13 (2.8%) operations with recurrences and 32 (7%) with complications. The statistical significance of recurrences was observed for the involved and uninvolved ciliary margin. At the temporal canthus, 23.1% of recurrences occurred compared to 7.7% at the medial canthus. SGC has the highest recurrence rate. Complications include the following: ectropion, dehiscence, gross cicatrix with normal function, retraction, post-radiation damage, sub-graft haemorrhage and graft rejection. Conclusions: The recurrence rate of eyelid tumours is lower than that of complications. The choice of surgical technique determines the frequency of complications and histological control of the excised tissue, as well as the frequency of recurrences
Recommended from our members
Russia: Failed Transition?
Full text linkGeorgi Derluguian, Department of Sociology, Northwestern University, talked about the Russian economy and socio-political system. The accompanying audio files provide the complete recording and audience discussion of the talk given by the author. Those who download the audio files must have their own software for playing and listening
Polynomial J-spectral factorization method for optimal control of discrete-time systems
No full textDimirovski, Georgi M. (Dogus Author)We present a simple algorithm for linear-quadratic control of discrete-time systems, based on polynomial J-spectral factorization
WIES VS. JONES PROCEDURE FOR ENTROPION: YOUNG OPHTHALMOLOGISTS LEARNING CURVE
Full text linkEntropion is a common eyelid disease with various etiologies that represents a change in the position of the eyelid, in which the edge is turned inward towards the eyeball. If left untreated, entropion can lead to several eye diseases.
Aim: We compared two possible entropion reconstruction options; the Wies and Jons procedures, performed by young ophthalmologists under supervision.
Methods: We selected 30 well-documented cases of patients operated > 3 years previously and followed for ≥ 2 years; 15 patients operated with the Wies technique and 15 with the Jones technique. The total operative time and learning curve of young ophthalmologists were observed and compared.
Results: We compared the degree of entropion correction, cosmetic outcomes, and recurrence for up to two years. As a cosmetic result, our observations demonstrated the advantages of the Wies technique. In the Jones procedure, plication caused slight thickening of the lower eyelid below the operative incision, making the operative cicatrix more visible. There were two cases of relapse with Wies and none with Jones during the first year.
Conclusion: Both techniques were applied for entropion correction. However, the Weis technique was suitable for manifest cases of entropion because it showed greater entropion reduction and better aesthetic postoperative results and was the method of choice for reoperation for the same disease. Young ophthalmologists adopted the Wies procedure much faster than did Jones
OCT Results in Myopia: Diagnostic Difficulties in Clinical Practice?
No full textBackground: Optical coherence tomography (OCT) is a modern, non-invasive technique for examining the posterior segment of the eye in vivo. The quality of images is crucial for the diagnostic process. Despite good image quality and high signal strength, we still obtain images with less relevant diagnostic data, especially in relation to RNFL and GCL thickness in myopic and hyperopic eyes. Aim: To evaluate the change of RNFL, GCL thickness and rim and disk areas in myopic eyes that underwent OCT examination before and after refractive correction with contact lenses or glasses. Method: A prospective cross-sectional pilot study included 43 eyes in 22 patients with myopia and hyperopia, with or without astigmatism. Patients were examined using OCT with and without contact lenses or glasses. Results: RNFL thickness, GCL thickness, rim area and disk area average and minimum values were significantly changed after correction with glasses or contact lenses. Conclusion: Myopic patients with greater than −2.50 D have to be examined using OCT with their contact lens or glasses corrections in the case of borderline data. Uncorrected myopic eyes show a thinner RNFL and GCL and smaller disk areas, which may mislead ophthalmologists
Passivity-based global stabilization of a class of switched nonlinear systems by backstepping
No full textDimirovski, Georgi M. (Dogus Author) -- Conference full title: 33rd Chinese Control Conference (CCC), 28-30 July 2014, Nanjing, ChinaThis paper considers the global stabilization problem for a class of switched nonlinear systems. Passivity-based global stabilization controller and a state-dependent switching law of switched nonlinear systems with any relative degree are designed with the help of the recursive feedback passification design technique. Finally, a numerical example is presented to illustrate the effectiveness of our results.IEE
- …
