Perceptual Quality Assessment of JMVC-Encoded Multi-View Videos on Autostereoscopic 3DTVs

24th Signal Processing and Communication Application Conference (SIU) -- MAY 16-19, 2016 -- Zonguldak, TURKEYWOS: 000391250900238Autostereoscopic 3D is the presentation of depth perception to viewer without eye glasses. The content watched on an autostereoscopic 3DTV, is called multi-view video. A preparation process, referred to as "interleaving", "interzigging", or "multiplexing", is applied to this type of content before being watched on an autoestereoscopic 3DTV. Bitrate requirement of Multi-View Videos is increased due to number of videos. To reduce this increase, MVC extension of H.264/AVC makes use of similarity of views. In this work, a program that processes multi-view videos for available autostereoscopic 3DTV is developed. In order to investigate the effect of different compression qualities on viewer liking, subjective tests are performed according to DSCQS method. Test results are evaluated in order to determine a compression quality that does not effect viewer liking but helps to reduce bitrate required.IEEE, Bulent Ecevit Univ, Dept Elect & Elect Engn, Bulent Ecevit Univ, Dept Biomed Engn, Bulent Ecevit Univ, Dept Comp Eng

Quality of experience measurement of compressed multi-view video

WOS: 000412265100015Quality of Experience (QoE) measurement in stereoscopic 3D is a challenging topic and existing standards such as ITU-R BT.500 may no longer be adequate for reliability and efficiency. Yet, objective measurement of QoE is not well researched for 3D images and videos. We present a new subjective assessment methodology providing better time-efficiency and more accurate scores at the same or even less number of assessors, using new objective metrics for QoE measurement of compressed multi-view video. Our research focus is twofold. First, the novel subjective testing methodology is developed, and QoE of different multi-view video compression technologies is evaluated. A time-efficient solution is proposed as a multiple stimuli plus simultaneous presentation extension of the conventional Double Stimulus Continuous Quality Scale (DSCQS) method. Second, objective quality metrics are proposed based on structural similarity and depth maps. Experiments are conducted on an auto-stereoscopic display while H.264/MPEG-4 Advanced Video Coding (AVC)- and High Efficiency Video Coding (HEVC)-based encoders are used for compression. The results demonstrate that the new methodology is superior to the DSCQS method in terms of both evaluation time and accuracy. Furthermore, high correlation is achieved with the new objective quality metrics. (C) 2017 Elsevier B.V. All rights reserved.Ege UniversityEge University [2013MUH-054]This project was funded by Ege University under the project 2013MUH-054. We thank Tridelity and the owners of the test sequences: the Tanimoto Laboratory of Nagoya University, Nokia, and Poznan University of Technology. We thank the reviewers for their insightful comments and valuable suggestions

Traumatic spinal cord and peripheral nerve injuries: correlation of trauma type with subsequent disability

Abstract Background Traumatic spinal cord and peripheral nerve injuries may lead to neurological deficits and fatal consequences. This study aimed to evaluate the characteristics of traumatic spinal cord and peripheral nerve injuries, examine the relationship between the type of injury and the affected nerves, and discuss appropriate prevention measures. Results Of these, 236 were males and 63 were females, and the mean age was 35.56 ± 15.10 years. Traffic accidents (56.9%) were the most common etiological factor. This study included 288 peripheral nerve injuries and 82 spinal cord injuries. The fibular nerve (n = 49) and cervical spinal cord (n = 35) were the most frequently injured areas. Permanent functional and sensorial losses associated with traumatic nerve injuries were observed in 239 (79.9%) cases, of which 171 exhibited loss of muscle strength, 114 presented with neuro-sensorial symptoms, 37 had urinary/faecal incontinence, and 1 demonstrated erectile dysfunction. And, the incidence of permanent loss of function was significantly higher following traffic accidents ( $$\chi$$ χ 2 = 50.095, Adj. p < 0.001). Conclusions Peripheral and spinal nerve injuries play a crucial role in forensic investigations, providing valuable insights into the circumstances surrounding a crime or injury. Their significance extends to both criminal and civil proceedings, influencing legal strategies, determinations of liability, and the quantification of damages. In this study, especially traffic accidents were significantly associated with nerve injuries leading to permanent loss of function, and the type of trauma was associated with the nerves injured. Therefore, this study will contribute to criminal and civil proceedings

Infection Agents Detected with Wound Culture in Patients with Diabetic Foot who will Undergo Hyperbaric Oxygen Treatment

AIM: We aimed to obtain the knowledge of appropriate antibiotic therapy and to make a contribution to improving treatment efficacy by conducting a microbiological study of diabetic foot ulcers. METHOD: 30 patients (18 male and 12 female) with diabetic foot ulcer applying to our center for hyperbaric oxygen (HBO) treatment in 2010 were enrolled in this study. The wounds were graded according to Meggitt-Wagner classification system. Wound cultures were obtained before starting antibiotic therapy and HBO treatment. Phoenix system (Becton Dickinson, USA) and Kirby-Bauer disk diffusion antibiotic sensitivity testing were used in order to detect the antimicrobial susceptibility of the infection agents. The number of HBO sessions, glycemic control and treatment results were assessed. RESULTS: Mean age of the patients was 61.3 years (range: 35-83). 24 patients had a good glycemic control and 6 patients had not. The patients were given 5 to 55 HBO sessions (mean: 20). Of the 30 patients 19 (63.33%) recovered from the infection but 11 (36.67%) have not responded to the treatment. 14 different infectious agents were detected in diabetic foot ulcers we examined. Gram-positive agents were isolated in 12 (40%) out of 30 wound cultures and gram-negative agents were isolated in 18 (60%) wound culture. Pseudomonas aeruginosa was predominantly isolated and the other agents isolated were enterococcus faecalis, klebsiella pneumoniae, staphylococcus aureus and escherichia coli. CONCLUSION: The outcomes can not represent the general population rates due to the restriction factors. They give only an idea about the probability of infectious agent spectrum in diabetic foot ulcers and their antibiotic susceptibility. We want to attract attention to the fact that although pseudomonas aeruginosa infections are mostly encountered in hospital, they can also be acquired from the community and it will be useful to develop appropriate antibiotic policies and treatment protocols. [TAF Prev Med Bull 2012; 11(2.000): 205-210

Evaluation of subgroups of the human sperm hypoosmotic swelling test in normozoospermic male cases with recurrent fertilization failure: a prospective case-controlled study

To compare subgroups of the human sperm hypoosmotic swelling test subgroups in both recurrent fertilization negative infertile cases with normal semen analysis and fertilization positive controls

Targeting Periostin Expression Makes Pancreatic Cancer Spheroids More Vulnerable to Natural Killer Cells

Pancreatic cancer (PaCa) characteristically has a dense tumor microenvironment, which results in poor patient prognosis. Pancreatic stellate cells (PSCs) are the most abundant cells in the PaCa microenvironment and the principal source of collagen. Periostin, a matricellular protein, is produced specifically by PSCs and promotes the aggressiveness of PaCa cells by facilitating extracellular collagen assembly. Here, we aimed to decrease extracellular collagen assembly by suppressing periostin, thereby increasing the cytotoxic activity of natural killer (NK) cells. Periostin expression was suppressed in PSCs (called PSC-P) using CRISPR-Cas9. PaCa cells (BxPC-3) were co-cultured with PSC and PSC-P cells in a 3D environment to form tumor spheroids mimicking the tumor microenvironment. The extracellular collagen production of spheroids was evaluated by Masson&rsquo;s trichrome staining. The cytotoxic activity of NK-92 cells was analyzed by flow cytometry and confocal microscopy via CD107a staining. Cell death in BxPC-3 cells was evaluated by measuring Annexin-V and PI positivity using flow cytometry. As a result, periostin suppression decreased extracellular collagen and increased the infiltration of NK-92 cells into spheroids, and induced cell death in PaCa cells. In conclusion, we suggest that periostin might be a therapeutic target for PaCa and further analysis is warranted using in vivo models for proof-of-concept

Targeting Periostin Expression Makes Pancreatic Cancer Spheroids More Vulnerable to Natural Killer Cells

Pancreatic cancer (PaCa) characteristically has a dense tumor microenvironment, which results in poor patient prognosis. Pancreatic stellate cells (PSCs) are the most abundant cells in the PaCa microenvironment and the principal source of collagen. Periostin, a matricellular protein, is produced specifically by PSCs and promotes the aggressiveness of PaCa cells by facilitating extracellular collagen assembly. Here, we aimed to decrease extracellular collagen assembly by suppressing periostin, thereby increasing the cytotoxic activity of natural killer (NK) cells. Periostin expression was suppressed in PSCs (called PSC-P) using CRISPR-Cas9. PaCa cells (BxPC-3) were co-cultured with PSC and PSC-P cells in a 3D environment to form tumor spheroids mimicking the tumor microenvironment. The extracellular collagen production of spheroids was evaluated by Masson’s trichrome staining. The cytotoxic activity of NK-92 cells was analyzed by flow cytometry and confocal microscopy via CD107a staining. Cell death in BxPC-3 cells was evaluated by measuring Annexin-V and PI positivity using flow cytometry. As a result, periostin suppression decreased extracellular collagen and increased the infiltration of NK-92 cells into spheroids, and induced cell death in PaCa cells. In conclusion, we suggest that periostin might be a therapeutic target for PaCa and further analysis is warranted using in vivo models for proof-of-concept

Early and mid-term results of application unipolar radiofrequency ablation Unipolar radyofrekans ablasyon uygulamasinin erken ve orta dönem sonuçlari

Objective: The aim of this study is to investigate the effectiveness of unipolar radiofrequency ablation in patients in whom valve replacement was performed for persistent atrial fibrillation. Material and Methods: In our study 22 patients were included which had concomitant mitral valve replacement and left atrial ablation between January 2010-January 2012. Mid-term control and postoperative electrocardiography records of the patients were evaluated retrospectively. In addition, the effects of cardiac function on postoperative AF were investigated. Results: After cardiopulmonary bypass, 14 (63.6%) patients maintained normal sinus rhythm, including one patient with the support of a temporary pace among 8 (36.3%) patients observed in the intensive care unit after replacement. In the early period, one patient died due to low flow, and prolonged intubation. At the end of the first month, 15 (71.4%) patients were in sinus rhythm, 6 patients (28.6%) had persistent atrial fibrillation. By the tenth postoperative month permanent pace maker was implanted to a patient with persistent atrial fibrillation. At the end of 6 th month he had no atrial fibrillation. Conclusion: The success achieved with the unipolar radiofrequency left atrial ablation was found to be consistent with the findings of the literature. In our study, patient age and pulmonary hypertension was evaluated as predictive of ongoing postoperative AF