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Journal of Advanced Dielectrics 2020年第1期10卷 74-79页

作者： Konstantin Andryushin Inna Andryushina hizir sadykov Alexandr Nagaenko Larisa Reznichenko Research Institute of Physics Southern Federal University Rostov-on-Don 344090Stachki str.194Russia Faculty of Physics and Information-Communication Technologies Chechen State University Grozny364024Sheripova str.32Russia Institute of High Technology and Piezo Technic Southern Federal University Rostov-on-Don 344090Milchakova 10Russia

This paper presents the results of a comprehensive study of the industrially produced ferro-piezoelectric ceramic material based on the PbZrO_(3)-PbTiO_(3)-PbMn_(1/3)Nb_(2/3)O_(3)-PbZn_(1/3)Nb_(2/3)O_(3)+SiO_(2)*** have confirmed that this material refers to ferrorigid materials with high coercive fields,stable dielectric properties in a wide temperature range,practically no Curie temperature hysteresis,as well as low controllability of the dielectric constant and deformation characteristics by constant bias electric *** revealed correlation between dielectric,deformation characteristics and dielectric hysteresis allows us to consider this material as promising for devices operating in power modes:piezotransformers,highly loaded ultrasonic devices,piezoelectric motors,etc.

关键词： Microstructure electric field PZT-PMN-PZN dielectric features deformation

Obtaining,structure,microstructure and dielectric characteristics of ceramics and thin films of ferro-piezoelectric materials based on the PZT system

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Journal of Advanced Dielectrics 2020年第1期10卷 16-22页

作者： Inna Andryushina Anatoliy Pavlenko Sergey Zinchenko Konstantin Andryushin Lidiya Shilkina Ekaterina Glazunova Alexandr Nagaenko Daniil Stryukov hizir sadykov Larisa Reznichenko Laboratory of Intelligent Materials Plasma Technologies and Innovative Multifunctional Systems Research Institute of Physics Southern Federal University Rostov-on-Don344090Stachki Str.194Russia Southern Scientific Centre Russian Academy of Sciences Rostov-on-Don344006Chehova Str.41Russia Institute of High Technology and Piezo Technic Southern Federal University Rostov-on-Don 344090Milchakova 10Russia Faculty of Physics and Information-Communication Technologies Grozny 364024Sheripova Str.32Russia

This paper presents the results of studies of the structure,microstructure,dependences of the piezoelectric properties on the electric field(dielectric hysteresis loops,reversible nonlinearity,deformation characteristics)and dielectric properties of the ceramic material PCR-13(based on the PZT system)in the temperature range 300-900K and frequencies of an alternating electric field(25÷2·10^(6))*** character of the obtained dependences made it possible to attribute PCR-13 to ferro-hard *** the HF cathodic sputtering method,PCR-13 thin films were fabricated on Si(001)*** is shown that they are polycrystalline textured,while in comparison with bulk material,the film contains tensile stresses of the unit cell in the plane of the substrate and compresses in the perpendicular direction with the valueε_(33)=-*** capacitance-voltage characteristics of the Al/PCR-13/Si/Al heterostructure were *** reasons for the revealed patterns are discussed.

关键词： Structure dielectric properties P-E loops S33-E curves thin films

Predisposing factors and surgical outcome of complicated liver hydatid cysts

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World Journal of Gastroenterology 2010年第24期16卷 3040-3048页

作者： Alper Akcan Erdogan Sozuer hizir Akyildiz Zeki Yilmaz Ahmet Ozturk Altay Atalay Department of General Surgery Erciyes University School of Medicine Department of Biostatistics Erciyes University School of Medicine Department of Microbiology Erciyes University School of Medicine

AIM: To evaluate the predisposing factors for peritoneal perforation and intrabiliary rupture and the effects of these complications on surgical outcome in liver hydatid ***: A total of 372 patients with liver hydatid cysts who had undergone surgical treatment were evaluated retrospectively. Twenty eight patients with peritoneal perforation, 93 patients with spontaneous intrabiliary perforation, and 251 patients with noncomplicated hydatid cysts were treated in our ***: When the predisposing factors for complications were evaluated, younger age, superf icial position, and larger cyst dimensions (P 0.05). The overall recurrence rate was 3.8% (14 patients), but there was not any statistical difference among the patient groups (P = 0.13). The early postoperative mortality rate was 1.1%. CONCLUSION: In peritoneally perforated and intrabiliary ruptured cases, the most important steps are irrigation of the peritoneal cavity and clearance of the cystic material from the biliary tree.

关键词： Complicated liver hydatid cysts Predisposing factors Surgical treatment Surgical outcome

Integrated model for earthquake risk assessment using neural network and analytic hierarchy process:Aceh province,Indonesia

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Geoscience Frontiers 2020年第2期11卷 613-634页

作者： Ratiranjan Jena Biswajeet Pradhan Ghassan Beydoun Nizamuddin Ardiansyah hizir Sofyan Muzailin Affan Centre for Advanced Modelling and Geospatial Information Systems(CAMGIS) School of InformationSystems and ModellingUniversity of Technology SydneyNSW2007Australia Department of Energy and Mineral Resources Engineering Choongmu-gwanSejong University209 Neungdong-roGwangjin-guSeoul05006South Korea Department of Informatics Syiah Kuala UniversityBanda AcehIndonesia Department of Statistics Syiah Kuala UniversityBanda AcehIndonesia

Catastrophic natural hazards,such as earthquake,pose serious threats to properties and human lives in urban ***,earthquake risk assessment(ERA)is indispensable in disaster *** is an integration of the extent of probability and vulnerability of *** study develops an integrated model by using the artificial neural network–analytic hierarchy process(ANN–AHP)model for constructing the ERA *** aim of the study is to quantify urban population risk that may be caused by impending *** model is applied to the city of Banda Aceh in Indonesia,a seismically active zone of Aceh province frequently affected by devastating *** is used for probability mapping,whereas AHP is used to assess urban vulnerability after the hazard map is created with the aid of earthquake intensity variation thematic *** risk map is subsequently created by combining the probability,hazard,and vulnerability ***,the risk levels of various zones are *** validation process reveals that the proposed model can map the earthquake probability based on historical events with an accuracy of 84%.Furthermore,results show that the central and southeastern regions of the city have moderate to very high risk classifications,whereas the other parts of the city fall under low to very low earthquake risk *** findings of this research are useful for government agencies and decision makers,particularly in estimating risk dimensions in urban areas and for the future studies to project the preparedness strategies for Banda Aceh.

关键词： Earthquake Hazard Vulnerability Risk GIS ANN–AHP

Melatonin reduces bacterial translocation and apoptosis in trinitrobenzene sulphonic acid-induced colitis of rats

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World Journal of Gastroenterology 2008年第6期14卷 918-924页

作者： Alper Akcan Can Kucuk Erdogan Sozuer Duygu Esel hizir Akyildiz Hulya Akgun Sabahattin Muhtaroglu Yucel Aritas Department of Surgery Erciyes University School of Medicine Kayseri 38039 Turkey Department of Microbiology Erciyes University School of Medicine Kayseri 38039 Turkey Department of Pathology Erciyes University School of Medicine Kayseri 38039 Turkey Department of Biochemistry Erciyes University School of Medicine Kayseri 38039 Turkey

AIM: To investigate the effects of exogenous melatonin on bacterial translocation and apoptosis in a rat ulcerati-ve colitis model. METHODS: Rats were randomly assigned to three groups: groupⅠ: control, group Ⅱ: experimental colitis, group Ⅲ: colitis plus melatonin treatment. On d 11 after colitis, plasma tumor necrosis factor-α, portal blood endotoxin levels, colon tissue myeloperoxidase and caspase-3 activity were measured. Bacterial translocation was quantified by blood, lymph node, liver and spleen culture. RESULTS: We observed a significantly reduced inciden-ce of bacterial translocation to the liver, spleen, mesen-teric lymph nodes, portal and systemic blood in animals treated with melatonin. Treatment with melatonin signifi-cantly decreased the caspase-3 activity in colonic tissues compared to that in trinitrobenzene sulphonic acid-trea-ted rats (16.11 ± 2.46 vs 32.97 ± 3.91, P < 0.01). CONCLUSION: Melatonin has a protective effect on ba-cterial translocation and apoptosis.

关键词： Melatonin Colitis Bacterial translocation Apoptosis

Ameliorative effects of bombesin and neurotensin on trinitrobenzene sulphonic acid-induced colitis,oxidative damage and apoptosis in rats

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World Journal of Gastroenterology 2008年第8期14卷 1222-1230页

作者： Alper Akcan Sebahattin Muhtaroglu Hulya Akgun hizir Akyildiz Can Kucuk Erdogan Sozuer Alper Yurci Namik Yilmaz Department of General Surgery ErciyesUniversity School of Medicine Kayseri 38039 Turkey Department of Biochemistry ErciyeUniversity School of Medicine Kayseri 38039 Turkey Department of Pathology Erciyes University School of Medicine Kayseri 38039 Turkey Department of Gastroenterology Erciyes University School of Medicine Kayseri 38039 Turkey

AIM:To investigate the effects of bombesin (BBS) and neurotensin (NTS) on apoptosis and colitis in an ulcerative colitis model. METHODS:In this study, a total of 50 rats were divided equally into 5 groups. In the control group, no colitis induction or drug administration was performed. Colitis was induced in all other groups. Following the induction of colitis, BBS, NTS or both were applied to three groups of rats. The remaining group (colitis group) received no treatment. On the 11th d after induction of colitis and drug treatment, blood samples were collected for TNF-α and IL-6 level studies. Malondialdehyde (MDA), carbonyl, myeloperoxidase (MPO) and caspase-3 activities, as well as histopathological findings, evaluated in colonic tissues. RESULTS:According to the macroscopic and microscopic findings, the study groups treated with BBS, NTS and BBS + NTS showed significantly lower damage and inflammation compared with the colitis group (macroscopic score, 2.1 ± 0.87, 3.7 ± 0.94 and 2.1 ± 0.87 vs 7.3 ± 0.94;microscopic score, 2.0 ± 0.66, 3.3 ± 0.82 and 1.8 ± 0.63 vs 5.2 ± 0.78, P < 0.01). TNF-α and IL-6 levels were increased significantly in all groups compared with the control group. These increases were significantly smaller in the BBS, NTS and BBS + NTS groups compared with the colitis group (TNF-α levels, 169.69 ± 53.56, 245.86 ± 64.85 and 175.54 ± 42.19 vs 556.44 ± 49.82;IL-6 levels, 443.30 ± 53.99, 612.80 ± 70.39 and 396.80 ± 78.43 vs 1505.90 ± 222.23, P < 0.05). The colonic MPO and MDA levels were significantly lower in control, BBS, NTS and BBS + NTS groups than in the colitis group (MPO levels, 24.36 ± 8.10, 40.51 ± 8.67 and 25.83 ± 6.43 vs 161.47 ± 38.24;MDA levels, 4.70 ± 1.41, 6.55 ± 1.12 and 4.51 ± 0.54 vs 15.60 ± 1.88, P < 0.05). Carbonyl content and caspase-3 levels were higher in the colitis and NTS groups than in control, BBS and BBS + NTS groups (carbonyl levels, 553.99 ± 59.58 and 336.26 ± 35.72 vs 209.76 ± 30.92, 219.76 ± 25.77 and 220.34 ± 36.95

关键词： Bombesin Neurotensin Colitis Apoptosis