Using image morphing for memory-efficient impostor rendering on GPU

Real-time rendering of large animated crowds consisting thousands of virtual humans is important for several applications including simulations, games and interactive walkthroughs; but cannot be performed using complex polygonal models at interactive frame rates. For that reason, several methods using large numbers of pre-computed image-based representations, which are called as impostors, have been proposed. These methods take the advantage of existing programmable graphics hardware to compensate the computational expense while maintaining the visual fidelity. Making the number of different virtual humans, which can be rendered in real-time, not restricted anymore by the required computational power but by the texture memory consumed for the variety and discretization of their animations. In this work, we proposed an alternative method that reduces the memory consumption by generating compelling intermediate textures using image-morphing techniques. In order to demonstrate the preserved perceptual quality of animations, where half of the key-frames were rendered using the proposed methodology, we have implemented the system using the graphical processing unit and obtained promising results at interactive frame rates

Postoperative complications and its relationship with the severity of postoperative pain in patients undergoing thoracic surgery

Aim: To investigate the complications that occur in our patients who underwent thoracic surgery, as well as the relationship between postoperative pain and complications. Method: Of the 117 patients who underwent surgery between January 2018 and December 2018, there were 99 patients with pain and the other parameters whose data’s were complete. Medical records of the patients were investigated in terms of age, gender, smoking status and frequency, diagnosis, treatment, length of stay in the hospital, postoperative complications and visual analog scale (VAS). The postoperative complications and VAS values were compared statistically. Results: The mean age of the patients was 50.52±18.46 years, 26 (26.3%) patients were female and 73 (73.7%) were male. The average length of stay in hospital was 4.08±3.06 days and average pain severity was 3.92±2.07. The most common diagnosis in our cases was lung cancer, and the most common complication was prolonged air leakage. There was a significant relationship between the severity of pain and the presence of postoperative complications in our patients (p=0.001). However, the correlation relationship was found to be low (r=0.322). Conclusion: The results of our study revealed that optimal postoperative pain control is an important factor for preventing postoperative complications

Investigation on the reliability of earthquake prediction based on ionospheric electron content variation

Ankara : The Department of Electrical and Electronics Engineering and the Graduate School of Engineering and Science of Bilkent Univ., 2013.Thesis (Master's) -- Bilkent University, 2013.Includes bibliographical references leaves 49-53.Ionosphere region of Earth’s upper atmosphere ranging from 90 km to 1000 km altitude, has a significant effect on military and civilian communications, satellite communications and positioning systems. Solar, geomagnetic, gravitational and seismic activities cause variations in the electron distribution of the atmosphere. The number of electrons within a vertical column of 1 m2 cross section, which is called as Total Electron Content (TEC), is a measurable feature of the ionosphere that provides valuable information about the ionosphere. TEC can be measured fast and accurately by using the phase difference between transmitted satellite positioning signals such as in the Global Positioning System (GPS). To investigate the reliability of earthquake prediction based on detection of local ionospheric anomalies, TEC measurements obtained from a network of GPS receivers over a period of 2 years in 2010 and 2011 are used to generate detection signals. For a day of interest, after selecting a receiver station surrounding GPS stations that are located within 150 km of the chosen station used to estimate TEC measurements at the chosen station. In one of the proposed techniques, detection of ionospheric anomalies is based on distance between measured TEC and its estimate. Detection threshold is obtained based on statistical variation of this distance for the days with insignificant seismic activities. Also, another detection technique based on temporal variation of TEC measurements is proposed. Both individual and fused detection performances of these techniques are investigated for a given level of false alarms. It is observed that the fused detection has superior performance and able to detect 15 out of 23 earthquakes of magnitude larger than 5 in Richter scale while generating 8 false alarms.Akyol, Ali AlpM.S

Inter-numerology interference pre-equalization for 5G mixed-numerology communications

This article proposes a pre-equalization method to remove inter-numerology interference (INI) that occurs in multi-numerology OFDM frame structures of fifth-generation New Radio (5G-NR) and beyond, on the transmitter side. In the literature, guard bands, filters, and interference cancellation methods are used to reduce the INI. In this work, we mathematically model how the INI is generated and show how it can be removed completely for multi-numerology systems by deploying a pre-equalization matrix on the transmitter side. With this pre-equalization method, the need for guard bands and filters is eliminated and spectral efficiency is improved.IEEE; Nokia; Huawei; Samsung; Technology Innovation Institute; Pix Movin

Xanthogranulomatous Endometritis: A Challenging Imitator of Endometrial Carcinoma

Xanthogranulomatous inflammation is a distinguished histopathological entity affecting several organs, predominantly the kidney and gallbladder. So far, only a small number of cases of xanthogranulomatous inflammation occurring in female genital tract have been described, most frequently affecting the endometrium and histologically characterized by replacement of endometrium by xanthogranulomatous inflammation composed of abundant foamy histiocytes, siderophages, giant cells, fibrosis, calcification and accompanying polymorphonuclear leucocytes, plasma cells and lymphocytes of polyclonal origin. We present a case of a 69-year-old female complained of post menopausal bleeding and weight loss. Clinical preliminary diagnoses were endometrial carcinoma or hyperplasia and ultrasound was supposed to be endometrial malignancy, hyperplasia or pyometra by radiologist. Histopathological examination of uterus revealed xanthogranulomatous endometritis. Since xanthogranulomatous endometritis may mimic endometrial malignancy clinically and pathologically as a result of the replacement of the endometrium and occasionally invasion of the myometrium by friable yellowish tissue composed of histiocytes, knowledge of this unusual inflammatory disease is needed for both clinicians and pathologists

Pirit içerikli kayaçların basma dayanımı ve bazı fiziksel parametreleri arasındaki ilişkilerin araştırılması

This study focuses on the investigation of the relationships between physical parameters (cohesion (C), internal friction angle (), unit weight (UW), ultrasonic P wave velocity (UPV)) and pyrite content (Py, %) with rock strength (UCS). Polished section analyses of rocks were performed via Clemex image analysis system and motorized table which are integrated into the trinocular research microscope that is a modern technique. Correlation analysis was performed between UCS and Py. Statistically significant relation wasn’t obtained between the data pairs even though coefficient of correlation is relatively high (r=0.69). However, a statistically significant relationship (with p=0.003 and F=302.6) was achieved with high coefficient of determination (R2=0.936) when multivariate regression analysis was carried out between UCS and other parameters including “Py” used in this study.Bu çalışma, kayaçların fiziksel parametreleri (kohezyon (C), içsel sürtünme açısı (), birim hacim ağırlık (UW), ultrasonik P dalga hızı (UPV)) ve pirit içeriğinin (Py, %) kayaç basma dayanımı (UCS) ile arasındaki ilişkilerin incelenmesine odaklanmaktadır. Kayaçların parlak kesit analizleri, modern bir teknik olan trinoküler araştırma mikroskobuna entegre edilmiş Clemex görüntü analiz sistemi ve motorlu tabla ile gerçekleştirilmiştir. UCS ve Py arasında korelasyon analizi yapılmıştır. Korelasyon katsayısı (r=0.69) nispeten yüksek olmasına rağmen veri çiftleri arasında istatistik olarak anlamlı bir ilişki elde edilememiştir. Öte yandan, UCS ve bu çalışmada kullanılan pirit içeriği dahil diğer parametreler arasında çoklu regresyon analizi yapıldığında, istatistiksel açıdan önemli ve (p=0.003 and F=302.6) çok güçlü/yüksek determinasyon katsayısına (R2=0.936) sahip tahmin modeli elde edilmiştir