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FORSAT:a 3D forest monitoring system for cover mapping and volumetric 3D change detection

International Journal of Digital Earth 2020年第8期13卷 854-885页

作者： Efstratios Stylianidis Devrim Akca Daniela Poli Martin Hofer Armin Gruen Victor Sanchez Martin Konstantinos Smagas Andreas Walli orhan Altan Elisa Jimeno Alejandro Garcia School of Spatial Planning and Development Aristotle University of ThessalonikiThessalonikiGreece Department of Civil Engineering Isik UniversitySileIstanbulTurkey DiXplorer AG ZurichSwitzerland GeoVille Information Systems GmbH InnsbruckAustria Chair of Information Architecture ETH ZurichSwitzerland Ingeniería Y Soluciones Informáticas S.L. SevillaSpain GeoImaging Ltd NicosiaCyprus Ekinoks Surveying Software Engineering Ltd IstanbulTurkey

A 3D forest monitoring system,called FORSAT(a satellite very high resolution image processing platform for forest assessment),was developed for the extraction of 3D geometric forest information from very high resolution(VHR)satellite imagery and the automatic 3D change *** is composed of two complementary tasks:(1)the geometric and radiometric processing of satellite optical imagery and digital surface model(DSM)reconstruction by using a precise and robust image matching approach specially designed for VHR satellite imagery,(2)3D surface comparison for change *** allows the users to import DSMs,align them using an advanced 3D surface matching approach and calculate the 3D differences and volume changes(together with precision values)between *** is a single source and flexible forest information solution,allowing expert and non-expert remote sensing users to monitor forests in three and four(time)*** geometric resolution and thematic content of VHR optical imagery are sufficient for many forest information needs such as deforestation,clear-cut and fire severity *** capacity and benefits of FORSAT,as a forest information system contributing to the sustainable forest management,have been tested and validated in case studies located in Austria,Switzerland and Spain.

关键词： Deforestation 3D VHR satellite imagery orientation image matching DSM generation co-registration volumetric change detection volume precision

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Pancreatic Involvement in Von Hippel-Lindau Syndrome: Report of a Total Pancreatectomy Case and Literature Review

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Surgical Science 2013年第2期4卷 151-153页

作者： Kursat Rahmi Serin Fatih Yanar orhan Agcaoglu Metin Keskin Ozgur Ceyhan orhan Bilge Department of General Surgery Istanbul Medical Faculty Istanbul University Istanbul Turkey Department of Radiology Istanbul Medical Faculty Istanbul University Istanbul Turkey

Von Hippel-Lindau (VHL) syndrome is a rare, autosomal dominantly inherited multicancer syndrome. Disease is predisposed by hemangioblastoma, renal cell carcinoma, pheochromocytoma, pancreatic islet cell and cystic tumors or epididymis tumors under the mutation or deletion at the tumor suppressor gene. Here we report a 42-year-old woman who had been operated for cerebellar hemangioblastoma and retinal angioma, and presented with recurrent, mild abdominal pain. In radiological imaging studies, multiple pancreatic cysts without nodulation were determined. Because of the mild abdominal pain and uncertain malignant potential of the cysts, total pancreatectomy was performed. She was discharged at the fifteenth day after the surgery without any problem. The patient has been followed for 62 months without any problem, and her diabetes mellitus is being controlled by medication.

关键词： Von Hippel-Lindau Syndrome Pancreatic Cyst Malignancy

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Investigation of Electrical Transport in PECVD Grown a-SiC_(x):H Thin Film

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Materials Sciences and Applications 2011年第8期2卷 993-999页

作者： orhan Ozdemir Kutsal Bozkurt Kubilay Kutlu Physics Department Yildiz Technical UniversityEsenler/IstanbulTurkey

Dc/ac transport characteristic of PECVD grown hydrogenated amorphous silicon carbide (a-SiCx:H) thin film was investigated in MIS (metal/insulator/semiconductor) structure by dc current/voltage (I/V) at different temperature (T), ac admittance vs. temperature at constant gate bias voltages and deep level transient spectroscopy (DLTS), respectively. According to I-V-T analysis, two main regimes exhibited. At low electric field, apparent Ohm’s law dominated with Arrhenius type thermal activation energy (EA) around 0.4 eV in both forward and reverse directions. At high field, on the contrary, space charge limited (SCL) current mechanism was eventual. The current transport mechanisms and its temperature/frequency dependence were interpreted by a thermally activated hopping processes across the localized states within a-SiCx:H thin film since 0.4 eV as EA was not high enough for intrinsic band conduction. Instead, transport of charge carriers took place in two steps;first a carrier is thermally excited to an empty energy level from an occupied state then multi-step tunnelling or hopping starts over. Therefore, the two steps mechanisms manifested as single activation energy, differing only through capture cross sections. In turn, two steps in capacitance together with conductance peaks in C-(G)-T while convoluted DLTS signal associated with such events in the measurements.

关键词： A-SiC_(x):H Dc/Ac Transport Conduction Mechanisms Apparent Activation Energy Admittance DLTS Hopping

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Evaluation of febrile neutropenic patients hospitalized in a hematology clinic

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Asian Pacific Journal of Tropical Biomedicine 2015年第12期5卷 1051-1054页

作者： Mucahit Goruk Mehmet Sinan Dal Tuba Dal Abdullah Karakus Recep Tekin Nida Ozcan orhan Ayyildiz Department of Internal Medicine Dicle University School of Medicine Department of Medical Microbiology Yildirim Beyazit University School of Medicine Department of Clinical Microbiology and Infectious Diseases Dicle University School of Medicine Department of Medical Microbiology Dicle University School of Medicine

Objective:To evaluate the febrile neutropenic patients with hematological malignancies hospitalized in hematology clinic with poor hygiene ***:A total of 124 patients with hematological malignancies(69 male,55 female)hospitalized in hematology clinic with poor hygiene conditions depending on hospital conditions,between January 2007 and December 2010,were evaluated,***:In this study,250 febrile neutropenia episodes developing in 124 hospitalized patients were *** the patients,69 were men(56%)and 55 women(44%).A total of 40 patients(32%)had acute myeloid leukemia,25(20%)acute lymphoblastic leukemia,19(15%)non-Hodgkin's lymphoma,10(8%)multiple myeloma,and 8(8%)chronic myeloid *** our study,56 patients(22%)were diagnosed as pneumonia,38(15%)invasive aspergillosis,38(15%)sepsis,16(6%)typhlitis,9(4%)mucormycosis,and 4(2%)urinary tract ***-positive cocci were isolated from 52%(n=20),while Gram-negative bacilli 42%(n=16)and yeasts from 6%(n=2)of the sepsis patients,*** most frequently isolated Gram-positive bacteria were methicillin-resistant coagulase-negative staphylococci(n=18),while the most frequently isolated Gram-negative bacteria was Escherichia coli(n=10).Conclusions:Febrile neutropenia is still a problem in patients with hematological *** documentation of the flora and detection of causative agents of infections in each unit would help to decide appropriate empirical *** control procedures should be applied for preventing infections and transmissions.

关键词： Febrile neutropenia Hematological malignancy Leuke Multiple myeloma Infections

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A Rare Cause of Pneumoperitoneum: Perforated Gastrointestinal Stromal Tumor (GIST)

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Open Journal of Gastroenterology 2014年第5期4卷 237-241页

作者： Thukirtha Manoharan Mahin Mohammadi orhan Bulut Department of Pathology Copenhagen University Hospital Hvidovre Copenhagen Denmark Department of Surgical Gastroenterology Copenhagen University Hospital Hvidovre Copenhagen Denmark

Gastrointestinal stromal tumor (GIST) is the most common mesenchymal tumor and has a malignant potential. The clinical presentation with pneumoperitoneum and peritonitis is extremely rare. We report a case of a 40-year-old male presented with symptoms of acute abdomen. Radiological work-up confirmed pneumoperitoneum. Emergency laparatomy and complete resection were performed. The final diagnosis revealed perforated GIST originating from the jejunum. If an abdominal mass presents with pneumoperitoneum and peritonitis, jejunal GIST should be considered in diagnosis. A complete radical resection followed by postoperative adjuvant chemotheraphy with Imatinib is recommended.

关键词： Gastrointestinal Stromal Tumor GIST Pneumoperitoneum Perforation Small Intestine

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Review of a challenging clinical issue:Intrahepatic cholestasis of pregnancy

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World Journal of Gastroenterology 2015年第23期21卷 7134-7141页

作者： Sebiha Ozkan Yasin Ceylan orhan Veli Ozkan Sule Yildirim Department of Obstetrics and Gynecology School of Medicine Kocaeli University Department of General Surgery Faculty of Medicine Sakarya University

Intrahepatic cholestasis of pregnancy(ICP) is a reversible pregnancy-specific cholestatic condition characterized by pruritus, elevated liver enzymes, and increased serum bile acids. It commences usually in the late second or third trimester, and quickly resolves after delivery. The incidence is higher in South American and Scandinavian countries(9.2%-15.6% and 1.5%, respectively) than in Europe(0.1%-0.2%). The etiology is multifactorial where genetic, endocrine, and environmental factors interact. Maternal outcome is usually benign, whereas fetal complications such as preterm labor, meconium staining, fetal distress, and sudden intrauterine fetal demise not infrequently lead to considerable perinatal morbidity and mortality. Ursodeoxycholic acid is shown to be the most efficient therapeutic agent with proven safety and efficacy. Management of ICP consists of careful monitoring of maternal hepatic function tests and serum bile acid levels in addition to the assessment of fetal well-being and timely delivery after completion of fetal pulmonary maturity. This review focuses on the current concepts about ICP based on recent literature data and presents an update regarding the diagnosis and management of this challenging issue.

关键词： Intrahepatic Cholestasis Pregnancy Diagnosis Management

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Conduction Mechanism Analysis of Inversion Current in MOS Tunnel Diodes

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Materials Sciences and Applications 2013年第12期4卷 794-801页

作者： Ayse Evrim Saatci orhan Ozdemir Kubilay Kutlu Department of Physics Yildiz Technical UniversityIstanbulTurkey

Self inversion issue and excess capacitance phenomenon were observed for the first time in relatively thick silicon dioxide (SiO2) in the form of MOS (metal(Al)/SiO2/p type crystalline silicon) structure. Both phenomena were based on minority carriers (electrons in this case) and studied through DC current-applied bias voltage (I-V) and AC admittance measurements in dark/light condition as a function of ambient temperature (295 - 380 K). Either of the cases was the departure of traditional MOS analysis, manifesting themselves in the inversion regime of MOS diode. Increase in frequency/temperature/light intensity within dark and light conditions led to weaken the maxima of hump in C-V curves and finally turned into deep depletion mode after exceeding threshold value of frequency/temperature/light intensity. In resumed conditions, supplementary I-V measurements were carried out to describe the generation and conduction mechanism(s) for minority carriers (electrons).

关键词： Excess Capacitance MOS Selfly Inverted Region Tunneling Based Inversion Currents

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2000年以来土耳其在中东地区的外交政策研究

2000年以来土耳其在中东地区的外交政策研究

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作者： orhan ERHAN（齐正）华中师范大学

学位级别：硕士

2000年以前的土耳其不愿牵涉到中东涡旋之中,随着2002年正发党上台,土耳其的政治、经济形势随之发生变化,又恰逢伊拉克战争后地区形势恶化、激进主义势头强劲。在此背景之下,正发党领导土耳其不仅广泛地参与到中东事务中,而且还明确提... 详细信息

2000年以前的土耳其不愿牵涉到中东涡旋之中,随着2002年正发党上台,土耳其的政治、经济形势随之发生变化,又恰逢伊拉克战争后地区形势恶化、激进主义势头强劲。在此背景之下,正发党领导土耳其不仅广泛地参与到中东事务中,而且还明确提出要谋求地区领导地位,以维护中东的和平与稳定。土耳其开始转变对中东地区的外交政策,在艰难与复杂中不断调整与中东各国的外交关系。土耳其首先推行“与邻国零问题”外交政策。该政策集中体现在2002-2010年之间,以不考虑国家政体、性质为前提,是经贸开道,与邻为善,广交朋友的外交政策,以改善土耳其在中东地区的生存空间,谋求地区的和平与稳定,从而实现地区的发展与进步。虽然此政策从政治角度出发,但却以经济合作和地区间相互依赖为目标。长期来看有利于促进土耳其与中东国家的和平关系,但是仅依靠先搁置争议来谋求发展的方式在实际操作中还是面临诸多问题。随着2011年中东局势变化,“零问题”外交政策不再可行。2011年“阿拉伯之春”转变为内战和地缘政治权力的游戏。在中东大动荡之际,土耳其的政治、社会状况却发展良好。在中东格局发生结构性变化的背景下土耳其逐渐抛弃前一外交政策,选择推行“宝贵孤独”外交,以价值为导向,强调与各国人民在一起而非各国政体,表明土耳其立场。但是最终却在各行为体共同作用之下导致了土耳其的“孤独”局势,给土耳其外交政策营造了一个负面环境。土耳其不仅与欧盟、美国和俄罗斯有冲突,同时还被多数邻国摒弃。正发党于2014年底对“宝贵孤独”外交政策中存在的各种问题进行总结、调整,跳出中东复杂的局势,提出“东向”外交政策。该政策拓展了“国内和平,国外和平”的外交思想,形成向东的积极新外交战略,将土耳其的外交方向转向“亚洲”,进一步加强了其与日本、印度尼西亚的联系,还恢复、拓展同俄罗斯、乌克兰等国家的经济往来,取得了系列成效,使土耳其的外交环境更为广阔。从2016年以后,结合土耳其所处的地区和国际环境,在“东向”政策的基础上进一步拓展而出了“多元”的外交政策,,土耳其开始以一种更积极的态度去解决中东的各种难题,不再继续延续从前亲西方、排东方的孤注一掷的单维度外交,而是以国家利益为导向,主动发挥能源、军事、旅游、教育等多方面的合作,发展与中东各国的外交关系。

关键词：土耳其中东外交政策

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400米跑运动员能量代谢特征和配速指标对运动成绩的影响

400米跑运动员能量代谢特征和配速指标对运动成绩的影响

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作者： Muradov orhan（奥航）北京体育大学

学位级别：硕士

研究目的:采用MAOD法测量运动员的供能特征指标,包含供能比例、最大摄氧量、跑步经济性、最大累积氧亏、运动中累积氧亏、血乳酸和摄氧量,同时测量与能量分配相关的配速指标(速度变异性),并分析上述供能特征与配速指标和运动成绩的相关... 详细信息

研究目的:采用MAOD法测量运动员的供能特征指标,包含供能比例、最大摄氧量、跑步经济性、最大累积氧亏、运动中累积氧亏、血乳酸和摄氧量,同时测量与能量分配相关的配速指标(速度变异性),并分析上述供能特征与配速指标和运动成绩的相关性,以探索反映运动成绩的敏感指标。研究方法:纳入11名田径400 m跑男运动员(年龄19.7±1.1岁,身高177.4 ± 5.1 cm,体重68.6±6.3 kg),包括4名一级运动员,7名二级运动员。受试者进行两部分实验:第一部分为实验室测试,包括(1)递增负荷测试:受试者佩戴便携式气体代谢分析仪,在跑台上以10km/h开始,每2min增加1km/h,运动至力竭后停止,跑台坡度设置为1%。该测试可获得最大摄氧量,以评价有氧能力。(2)恒定负荷测试:根据递增负荷测试的最大摄氧量强度,令受试者完成5级恒定负荷测试(50%、60%、70%、80%和90%VO2max),每级持续10min,该测试每级最后2 min平均摄氧量可评价跑步经济性。(3)超大强度测试:受试者进行一次超大强度测试,即要求受试者以110%VO2max,在坡度1%的跑台上运动至力竭(≥2min),该测试的最大累积氧亏值大小可评价无氧能力。第二部分为田径场专项400 m跑测试,以测试运动员400 m跑运动过程中的供能比例、摄氧量和累积血乳酸。测试前佩戴便携式气体代谢分析仪,采集起跑前和运动后1 min、4 min、7 min、10 min指尖血。在对运动员400 m跑进行分段速度分析时,以每50米进行分段,并利用变异系数(coefficient of variation,CV)评价分段速度变化。研究结果:(1)实验室测试的能量代谢特征指标:最大摄氧量为57.73±2.14 ml/kg/min,跑步经济性 RE90(90%VO2max)为 54.34±2.15,最大累积氧亏为 58.99±12.23 ml/kg/min。(2)400 m跑测试的能量代谢指标:有氧和无氧供能比例分别为 47.05±4.32%和 52.95±4.32%;400 m 跑分段VO2 总变异系数为 2.17±0.47,有氧供能百分比总变异系数为2.99±0.74,无氧供能百分比总变异系数为2.12±0.52。运动中累积氧亏为44.2±4.64 ml/kg/min,累积血乳酸为15.5± 2.04 mmol/l。(3)400 m跑的成绩为54.2±1.44 s,速度总变异系数为1.27±0.23,另外400 m跑分段速度峰值出现在50-150米分段内,400 m跑的摄氧量峰值出现在200-250米内。(4)Pearson相关分析结果显示,速度总变异系数(r=-0.57)分别与运动成绩存在负相关关系(P0.05)研究结论:1.本研究选择的400m跑运动员(运动成绩为54.2±1.44 s),供能比例有氧占47.05±4.32%,无氧占52.95±4.32%;2.以上水平的运动员分段速度变化越小,运动成绩越好,即配速可能对运动成绩产生影响;3.本研究尚未发现供能比例、最大摄氧量、最大累积氧亏、跑步经济性、运动中累积氧亏和累积血乳酸是反映运动成绩的敏感指标。

关键词： 400m跑能量代谢特征指标配速指标运动成绩

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Investigation of Carrier Conduction Mechanism over InAs/InP Quantum Dashes and InAs/GaAs Quantum Dots Based p-i-n Laser Heterostructures

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Journal of Materials Science and Chemical Engineering 2017年第9期5卷 1-9页

作者： Neslihan Ayarci Kuruoglu orhan Ozdemir Kutsal Bozkurt Department of Physics Faculty of Science and LettersYildiz Technical UniversityIstanbulTurkey

Charge transfer characteristics of the long wavelength semiconductor laser structures, containing quantum dot layers (QDs), were investigated by means of temperature dependent current-voltage and electroluminescence measurements over InAs/InP, and InAs/GaAs based p-i-n structures. In InAs/InP elongated QDs (QDashes) structure, injected carriers were tunneled from the quantum well into QDashes through a thin barrier and subsequently recombined within QDashes. Meanwhile, for InAs/GaAs structure, tunneling kind transport was exhibited in both forward and reverse bias voltage directions. The onset of light took place when the forward bias exceeded 1.3 V (3 V) for InAs/InP (InAs/GaAs) p-i-n structure through electroluminescence measurements. The peak value of emitted laser light for InAs/InP QDashes and InAs/GaAs QDs occurred in 1.55 μm and 1.3 μm, respectively.

关键词： Long Wavelength Laser Diode Quantum Dots Quantum Dashes Electroluminescence Temperature Dependent Currentdensity-Voltage Characteristics

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