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Robust Designs Through Risk Sensitivity:An Overview

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Journal of Systems Science & Complexity 2021年第5期34卷 1634-1665页

作者： baSar Tamer Coordinated Science Laboratory University of Illinois1308 West MainUrbanaIL 61801USA.

This is an overview paper on the relationship between risk-averse designs based on exponential loss functions with or without an additional unknown(adversarial)term and some classes of stochastic *** particular,the paper discusses the equivalences between risk-averse controller and filter designs and saddle-point solutions of some corresponding risk-neutral stochastic differential games with different information structures for the *** of the by-products of these analyses is that risk-averse controllers and filters(or estimators)for control and signal-measurement models are robust,through stochastic dissipation inequalities,to unmodeled perturbations in controlled system dynamics as well as signal and the measurement *** paper also discusses equivalences between risk-sensitive stochastic zero-sum differential games and some corresponding risk-neutral three-player stochastic zero-sum differential games,as well as robustness issues in stochastic nonzero-sum differential games with finite and infinite populations of players,with the latter belonging to the domain of mean-field games.

关键词： Mean-field games risk-sensitive control risk-sensitive filtering risk-sensitive games risk sensitivity robustness

baNACH SPACES AND INEQUALITIES ASSOCIATED WITH NEW GENERALIZATION OF CESàRO MATRIX

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Acta Mathematica Scientia 2023年第4期43卷 1518-1536页

作者： Feyzi baSar Hadi ROOPAEI Department of Primary Mathematics Teacher Education Inonu University44280–MalatyaTurkiye Department of Mathematics and Statistics University of VictoriaVictoriaCanada

Let the triangle matrix A^(ru)be a generalization of the Cesàro matrix and U∈{c_(0),c,l_(∞)}.In this study,we essentially deal with the space U(A^(ru))defined by the domain of A^(ru)in the space U and give the bases,and determine the Kothe-Toeplitz,generalized K?theToeplitz and bounded-duals of the space U(A^(ru)).We characterize the classes(l_(∞)(A^(ru)):l_(∞)),(l_(∞)(A^(ru)):c),(c(A^(ru)):c),and(U:V(A^(ru)))of infinite matrices,where V denotes any given sequence ***,we also present a Steinhaus type *** an another result of this study,we investigate the l_(p)-norm of the matrix A^(ru)and as a result obtaining a generalized version of Hardy's inequality,and some inclusion ***,we compute the norm of well-known operators on the matrix domain l_(p)(A^(ru)).

关键词： matrix domain normed sequence space duals and matrix transformations

Decentralized multi-agent reinforcement learning with networked agents: recent advances

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Frontiers of Information Technology & Electronic Engineering 2021年第6期22卷 802-814页

作者： Kaiqing ZHANG Zhuoran YANG Tamer baŞar Coordinated Science Laboratory University of Illinois at Urbana-ChampaignIL 61801USA Department of Operations Research and Financial Engineering Princeton UniversityNJ 08544USA

Multi-agent reinforcement learning(MarL) has long been a significant research topic in both machine learning and control systems. Recent development of(single-agent) deep reinforcement learning has created a resurgence of interest in developing new MarL algorithms, especially those founded on theoretical analysis. In this paper, we review recent advances on a sub-area of this topic: decentralized MarL with networked *** this scenario, multiple agents perform sequential decision-making in a common environment, and without the coordination of any central controller, while being allowed to exchange information with their neighbors over a communication network. Such a setting finds broad applications in the control and operation of robots, unmanned vehicles, mobile sensor networks, and the smart grid. This review covers several of our research endeavors in this direction, as well as progress made by other researchers along the line. We hope that this review promotes additional research efforts in this exciting yet challenging area.

关键词： Reinforcement learning Multi-agent systems Networked systems Consensus optimization Distributed optimization Game theory

Liver injury associated with Malva grandifolia

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Hepatobiliary & Pancreatic Diseases International 2010年第4期9卷 443-444页

作者： Ekiz F Yüksel  ba■ar  oban ■ Yüksel O Teber MA Department of Gastroenterology Diskapi Yildirim Beyazit Educational and Research Hospital Department of Radiology Ankara Etlik Ihtisas Educational and Research Hospital

To the Editor: Dietary supplements and herbal products are an increasingly common source of drug-induced liver injury. An increasing number of case reports have suggested causative supplement-associated liver toxicity. [1] Malva grandifolia is a plant which is frequently found in flower and vegetable gardens (Fig.). Mallow products are used

关键词： Liver injury associated with Malva grandifolia

Isolated dorsal approach for the treatment of neglected volar metacarpophalangeal joint dislocations

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World Journal of Orthopedics 2014年第1期5卷 62-66页

作者： Hakan ba?ar Mustafa Erkan ?nanmaz Kamil ?a?r? K?se Cihangir Tetik Department of Orthopaedic and Traumatology Sakarya Training and Research Hospital Department of Orthopaedics and Traumatology Acibadem Maslak Hospital

Here, we present the clinical and radiological results of three neglected volar metacarpophalangeal dislocations in 2 patients, which were treated with open reductions 10 and 24 mo after the dislocations. There was a mean of a 20°(range 10°-30°) limitation of extension and a 53.3°(range 30°-70°) limitation of flexion preoperatively. Postoperatively, there was no limitation of extension(at 8 and 12 mo) in any of the fingers. In terms of flexion, one finger had full function, one had a 10° and the last one had a 30° limitation of flexion. Two of the fingers presented anesthesia preoperatively, which improved to hypesthesia postoperatively. One finger had hypesthesia, which improved postoperatively. During surgery, a ruptured dorsal capsule was found to have interposed into the joint, making closed reduction impossible. Our experience with these two patients demonstrated that, even in neglected cases, open reduction using an isolated dorsal approach may result in satisfactory clinical andradiological outcomes.

关键词： metacarpophalangeal dislocation Neglected dislocation Surgical treatment Dorsal surgical approach metacarpophalangeal dislocation rehabilitation

Primary sclerosing cholangitis in Turkish patients:characteristic features and prognosis

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Hepatobiliary & Pancreatic Diseases International 2009年第3期8卷 312-315页

作者： Hilmi Ataseven Erkan Parlak lhami Yüksel mer ba■ar brahim Ertu■rul Nurgül ■a■maz Burhan ■ahin Department of Gastroenterology Türkiye Yüksek htisas Hospital Department of Gastroenterology Di■kapl Yildirlm Beyazlt Education and Research Hospital

baCKGROUND:Primary sclerosing cholangitis(PSC)is a chronic cholestatic liver disease characterized by destruction and fibrosis of the bile *** study aimed to demonstrate the hepatic and extrahepatic characteristic findings and prognostic outcomes of Turkish patients with PSC. METHODS:The medical records of 35 consecutive patients with PSC from January 1988 to June 2007 were recorded *** the time of diagnosis,clinical features and laboratory data were collected. RESULTS:The mean age of the 35 patients was 41.69 years (range 15-80 years)at the time of diagnosis;14(40%)were female,and 21(60%)were *** mean duration of follow-up was 58.86 months(1-180 months).Twenty(57.1%) of the patients with PSC were asymptomatic and 22(62.9%) had inflammatory bowel *** the time of diagnosis, 20(57.1%)of the patients had both intra-and extra-hepatic ***-one(60%)of the patients,who had undergone ERCP for stent placement,had dominant bile duct stenosis. Cholangiocarcinoma was found in 2(5.7%)of the patients and cirrhosis was detected in 7(20%);5(14.3%)underwent liver *** median follow-up time after liver transplantation was 23 months and all are still *** (17.1%)patients died. CONCLUSIONS:PSC has a clinical course varied from advanced liver disease requiring liver transplantation within a short time to being asymptomatic for decades. The prognosis of Turkish patients with PSC is also disappointing as described in other studies.

关键词： primary sclerosing cholangitis cholestatic liver diseases biliary tree endoscopic retrograde cholangiopancreatography

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关于亚屯函数闭凸性的一些判据

Journal of Mathematical Research and Exposition 2000年第2期20卷 177-180页

作者： Ural.,ba Desai,ar

Ileo-ileal invagination caused by lymphoma

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Chinese Medical Journal 2007年第12期120卷 1119-1120页

作者： mer ba ar Blent demi íbrahim Ertu rul Hilmi Ataseven Taner Oru Department of Gastrosurgery Trkiye Yksek íhtisas Hospital Tepeba i Mahallesi Fatih caddesi No: 181/1206290 Keiren Ankara Turkey

To the editor： Intestinal invagination is uncommon in adults, and neoplasm is the main cause. Ileo-ileal invagination due to lymphoma in adults has been rarely reported in the literature.

关键词： Ileo-ileal invagination caused by lymphoma

Anterior Mitral Valve Orifice in a Dog

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Open Journal of Veterinary Medicine 2021年第3期11卷 117-123页

作者： başar Ulaş Sayilkan Yücel Meral Emre Küllük Duygu Dalgin Department of Internal Medicine Faculty of Veterinary Medicine Ondokuz May&#305s University Samsun Turkey

The patient was admitted to OndokuzMayıs University Animal Hospital Internal Medicine outpatient clinic with complaints of epileptic seizures and hypothyroidism. A description of the patient’s owner is available in the history information. There was no physician information. Bradycardia was found in the electrocardiography of the patient. 2-D, M-Mode, PW, CW and Color doppler examinations were performed. Left-ventricular hypokinetic and mitral and tricuspidal valve movements were observed with limited M-Mode imaging. Anterior mitral orifice of 2 mm width was detected on septal mitral valve by PW doppler and color doppler. With this orifice, the presence of regurgitant jet, which covers LA at a rate of 1/3 and was 3.2 m/sec, together with mitral regurgitation (0.5 m/sec.), was demonstrated. PISA calculations;VFR (mL/s), ERO (mm2) and RVol (mL/pulse) values were calculated as if there were mitral regurgitation and data were obtained for mild-moderate mitral regurgitation. Therefore, no operative treatment of the orifice was recommended. Mitral valve orifice is a rare pathology and this is the first report in canine veterinary practice with degenerative mitral valve disorder. We aimed to underline the possibility of mitral orifice development in degenerative mitral valve disorders, known to present with vegetations and varying degrees of prolapsus, conventionally.

关键词： Dog Echocardiography Anterior Mitral Valve Orifice Degenerative Mitral Valve Disorder Mitral Regurgitation Doppler Echocardiography