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A pricing scheme for electric utility’s participation in day-ahead and real-time flexibility energy markets

现代电力系统与清洁能源学报（英文） 2019年第5期7卷 1294-1306页

作者： Ioannis MAMOUNAKIS Nikolaos EFTHYMIOPOULOS dimitrios J.VERGADOS Georgios TSAOUSOGLOU Prodromos MAKRIS Emmanouel Manos VARVARIGOS Department of Electrical and Computer Engineering Institute of Communication and Computer SystemsNational Technical University of AthensAthensGreece Department of Computer Engineering and Informatics University of PatrasRio-PatrasGreece Department of Electrical and Computer Systems Engineering Monash UniversityMelbourneAustralia

Liberalized electricity markets,smart grids and high penetration of renewable energy sources(RESs)led to the development of novel markets,whose objective is the harmonization between production and demand,usually noted as real time of flexibility *** necessitates the development of novel pricing schemes able to allow energy service providers(ESPs)to maximize their aggregated profits from the traditional markets(trading between wholesale/day-ahead and retail markets)and the innovative flexibility *** the same time,ESPs have to offer their end users(consumers)competitive(low cost)energy *** this context,novel pricing schemes must act,among others,as automated demand side management(DSM)techniques that are able to trigger the desired behavioral changes according to the flexibility market prices in energy consumption curves(ECCs)of the *** pricing schemes proposed so far,*** pricing,interact in an efficient way with wholesale *** they do not provide consumers with strong enough financial incentives to modify their energy consumption habits towards energy cost ***,they do not interact efficiently with flexibility ***,we develop a flexibility real-time pricing(FRTP)scheme,which offers a dynamically adjustable level of financial incentives to participating users by fairly rewarding the ones that make desirable behavioral changes in their *** evaluation results demonstrate that the proposed FRTP is able to offer a 15%–30%more attractive trade-off between the stacked profits of ESPs,*** sum of the profits from retail and flexibility markets,and the satisfaction of consumers.

关键词： Demand response Flexibility markets Realtime pricing(RTP) Behavioral change Energy efficiency

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COVID-19 and the cardiovascular system-current knowledge and future perspectives

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World Journal of Clinical Cases 2022年第27期10卷 9602-9610页

作者： dimitrios G Chatzis Kalliopi Magounaki Ioannis Pantazopoulos Sonu Menachem Maimonides Bhaskar Medical School European University CyprusNicosia 2404Cyprus Department of Internal Medicine KAT General HospitalAthens 14561Greece Department of Emergency Medicine Faculty of MedicineUniversity of ThessalyLarissa 41500Greece NSW Brain Clot Bank NSW Health PathologySydneyNSW 2170Australia Department of Neurology and Neurophysiology Liverpool Hospital and South Western Sydney Local Health DistrictSydneyNSW 2170Australia

The current coronavirus disease 2019(COVID-19) pandemic has had devastating impact on populations around the *** high mortality rates in patients with COVID-19 has been attributed to the influence of severe acute respiratory syndrome coronavirus-2(SARS-CoV-2),its causative viral agent,on several physiological systems in human body,including the respiratory,cardiovascular,and neurological *** is emerging evidence on propensity of this virus to attack cardiovascular ***,various pathophysiological mechanisms by which SARS-CoV-2 interacts with cardiovascular system and leads to high morbidity and mortality,including cardiovascular complications,are poorly *** mini review aims to provide an update on the current knowledge and perspectives on areas of future research.

关键词： COVID-19 Angiotensin-converting enzyme 2 receptors Cardiovascular manifestations Therapies

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Colorectal cancer,screening and primary care: A mini literature review

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World Journal of Gastroenterology 2017年第33期23卷 6049-6058页

作者： Athanasios Hadjipetrou dimitrios Anyfantakis Christos G Galanakis Miltiades Kastanakis Serafim Kastanakis Primary Health Care Centre of Kissamos First Department of Surgery Saint George General Hospital of Chania Private Family Practice Unit in Chania Department of Internal Medicine Saint George General Hospital of Chania

Colorectal cancer(CRC) is a common health problem,representing the third most commonly diagnosed cancer worldwide and causing a significant burden in terms of morbidity and mortality,with annual deaths estimated at 700000. The western way of life,that is being rapidly adopted in many regions of the world,is a well discussed risk factor for CRC and could be targeted in terms of primary prevention. Furthermore,the relatively slow development of this cancer permits drastic reduction of incidence and mortality through secondary prevention. These facts underlie primary care physicians(PCPs) being assigned a key role in health strategies that enhance prevention and prompt diagnosis. Herein,we review the main topics of CRC in the current literature,in order to better understand its pathogenesis,risk and protective factors,as well as screening techniques. Furthermore,we discuss preventive and screening policies to combat CRC and the crucial role served by PCPs in their successful implementation. Relevant articles were identified through electronic searches of MEDLINE and through manual searches of reference lists.

关键词： Colorectal cancer Prevention Diagnosis Screening Primary care

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Pediatric transplantation during the COVID-19 pandemic

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World Journal of Transplantation 2022年第5期12卷 88-99页

作者： Christos dimitrios Kakos Ioannis A Ziogas Georgios Tsoulfas Surgery Working Group Society of Junior DoctorsAthens 15123Greece Division of Hepatobiliary Surgery and Liver Transplantation Department of SurgeryVanderbilt University Medical CenterNashvilleTN 37232United States Department of Transplantation Surgery Aristotle University School of MedicineThessaloniki 54622Greece

Children infected by severe acute respiratory syndrome coronavirus 2(SARSCoV-2)seem to have a better prognosis than ***,pediatric solid organ transplantation(SOT)has been significantly affected by the unprecedented coronavirus disease 2019(COVID-19)pandemic during the pre-,peri-,and posttransplant ***,immunosuppression constitutes a real challenge for transplant clinicians as increased immunosuppression may prolong disease recovery,while its decrease can contribute to more severe *** date,most pediatric SOT recipients infected by SARS-CoV-2 experience mild disease with only scarce reports of life-threatening *** a consequence,after an initial drop during the early phase of the pandemic,pediatric SOTs are now performed with the same frequency as during the pre-pandemic *** review summarizes the currently available evidence regarding pediatric SOT during the COVID-19 pandemic.

关键词： Pediatric Transplantation SARS-CoV-2 COVID-19 Immunosuppression

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Peripapillary retinal nerve fibre layer thickness measurement with SD-OCT in normal and glaucomatous eyes:distribution and correlation with age

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International Journal of Ophthalmology(English edition) 2013年第5期6卷 662-665页

作者： George Kampougeris dimitrios Spyropoulos Adrianna Mitropoulou Aggeliki Zografou Pericles Kosmides Department of Ophthalmology Athens Medical Center

AIMTo determine peripapillary retinal fiber layer thickness (RNFL) measured with spectral domain optical coherence tomography (SD-OCT) in normal and glaucomatous eyes in a large sample of exclusively white population ... 详细信息

关键词： SD-OCT retinal fiber layer thickness optic disc

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Biochar filler in MEX and VPP additive manufacturing:characterization and reinforcement effects in polylactic acid and standard grade resin matrices

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Biochar 2023年第1期5卷 674-694页

作者： Nectarios Vidakis dimitrios Kalderis Markos Petousis Emmanuel Maravelakis Nikolaos Mountakis Nikolaos Bolanakis Vassilis Papadakis Department of Mechanical Engineering Hellenic Mediterranean University71410 HeraklionGreece Department of Electronic Engineering Hellenic Mediterranean University73133 ChaniaGreece Institute of Electronic Structure and Laser of the Foundation for Research and Technology-Hellas 71110 HeraklionGreece

The development of sustainable and functional biocomposites remains a robust research and industrial ***,the efficiency of using eco-friendly biochar as reinforcement in Additive Manufacturing(AM)was *** AM technologies were applied,i.e.,vat photopolymerization(VPP)and material extrusion(MEX).A standard-grade resin in VPP and the also eco-friendly biodegradable Polylactic Acid(PLA)in the MEX process were selected as polymeric *** was prepared in the study from olive *** were developed for both 3D printing processes at different biochar *** were 3D-printed and mechanically tested after international test *** Analysis and Raman revealed the thermal and structural characteristics of the *** and fractographic features were derived,among others,with Scanning Electron Microscopy(SEM)and Atomic Force Microscopy(AFM).Biochar was proven to be sufficient reinforcement agent,especially in the filament MEX process,reaching more than 20%improvement at 4 wt.%loading in tensile strength compared to the pure PLA control *** the VPP process,results were not as satisfactory,still,a 5%improvement was achieved in the flexural strength with 0.5 wt.%biochar *** findings prove the strong potential of biochar-based composites in AM applications,too.

关键词： Biochar Resin Polylactic acid(PLA) Vat photopolymerization(VPP) Material extrusion(MEX) Mechanical characterization

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Promoter methylation status of hMLH1,MGMT,and CDKN2A/p16 in colorectal adenomas

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World Journal of Gastroenterology 2010年第28期16卷 3553-3560页

作者： Vasiliki Psofaki Chryssoula Kalogera Nikolaos Tzambouras dimitrios Stephanou Epameinondas Tsianos Konstantin Seferiadis Georgios Kolios Laboratory of Clinical Chemistry University of Ioannina Medical School45500 IoanninaGreece Laboratory of Biochemistry University Hospital of IoanninaLeoforos S.Niarchou45500 IoanninaGreece Hepatogastroenterology Unit of Internal Medicine University Hospital of IoanninaLeoforos S.Niarchou45500 IoanninaGreece Laboratory of Pathology University Hospital of IoanninaLeoforos S.Niarchou45500 IoanninaGreece

AIM:To investigate aberrant DNA methylation of CpG islands and subsequent low-or high-level DNA microsatellite instability(MSI)which is assumed to drive colon carcinogenesis. METHODS:DNA of healthy individuals,adenoma(tu-bular or villous/tubulovillous)patients,and colorectal carcinoma patients who underwent colonoscopy was used for assessing the prevalence of aberrant DNA methylation of human DNA mismatch repair gene mutator L homologue 1(hMLH1),Cyclin-dependent kinase inhibitor 2A(CDKN2A/p16),and O-6-methylguanine DNA methyltransferase(MGMT),as well as their rela- tion to MSI. RESULTS:The frequency of promoter methylation for each locus increased in the sequence healthy tissue/adenoma/*** showed the highest frequency in each *** and CDKN2A/p16 presented a statistically significant increase in promoter methylation between the less and more tumorigenic forms of colorectal adenomas(tubular vs tubullovillous and villous adenomas).All patients with tubulovillous/villous adenomas,as well as all colorectal cancer patients,showed promoter methylation in at least one of the examined *** findings suggest a potentially crucial role for methylation in the polyp/adenoma to cancer progres- sion in colorectal *** and methylation seem to be interdependent,as simultaneous hMLH1, CDKN2A/p16,and MGMT promoter methylation was present in 8/9 colorectal cancer patients showing the MSI phenotype. CONCLUSION:Methylation analysis of hMLH1,CD- KN2A/p16,and MGMT revealed specific methylation profiles for tubular adenomas,tubulovillous/villous adenomas,and colorectal cancers,supporting the use of these alterations in assessment of colorectal tumorigenesis.

关键词： Promoter methylation Microsatellite instability Human DNA mismatch repair gene mutator L homologue 1 O-6-methylguanine DNA methyltransferase Cyclin-dependent kinase inhibitor 2A

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Histone deacetylase inhibitors as a novel therapeutic approach for pheochromocytomas and paragangliomas

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Oncology Research 2022年第5期30卷 211-219页

作者： ASPASIA MANTA SPYRIDON KAZANAS STEFANOS KARAMAROUDIS HELEN GOGAS dimitrios C.ZIOGAS Endocrine Unit Second Department of Internal Medicine Propaedeutic&Research InstituteMedical SchoolNational and Kapodistrian University of AthensAttikon University HospitalAthens12461Greece First Department of Internal Medicine Medical SchoolNational and Kapodistrian University of AthensLaikon General HospitalAthens11527Greece Department of Obstetrics&Gynecology General Hospital of Elefsina ThriassioElefsina19600Greece

Epigenetic mechanisms,such as DNA methylation and histone modiﬁcations(e.g.,acetylation and deacetylation),are strongly implicated in the carcinogenesis of various *** transcription,the expression and functionality of coding gene products are altered following the histone acetylation and *** processes are regulated by histone acetyltransferases(HATs)and histone deacetylases(HDACs),*** inhibitors(HDACis)have been developed as promising therapeutic agents,to limit exposure to traditional and toxic chemotherapies and offer more alternatives for some speciﬁc malignant diseases with limited ***,these agents affect many intracellular pathways,including cell cycle arrest,apoptosis and differentiation,and their mechanism of action mainly depends on the type of ***,ﬁve HDACis have been approved for the treatment of several hematological malignancies(e.g.,T-cell lymphoma subtypes and multiple myeloma);while,many of them are tested for further therapeutic indications in solid tumors(e.g.,colorectal,thyroid,breast,lung and pancreatic cancer).Herein,we review the literature and gather all available evidence,from in vitro and in vivo data to clinical trial results,that recognizes the antitumor activity of HDACis on pheochromocytomas and paragangliomas;and supports their clinical implementation in the treatment of these rare neuroendocrine tumors at metastatic setting.

关键词： HDACis HDAC inhibitors Neuroendocrine tumors Epigenetics Histone deacetylation Cancer

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Addressing Frequency Control Challenges in Future Low-Inertia Power Systems:A Great Britain Perspective

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Engineering 2021年第8期7卷 1057-1063页

作者： Qiteng Hong Md Asif Uddin Khan Callum Henderson AgustíEgea-Àlvarez dimitrios Tzelepis Campbell Booth Department of Electronic and Electrical Engineering University of StrathclydeGlasgow G11XWUK

The ambitious global targets on decarbonization present the need for massive integration of renewable generation in power systems,resulting in a significant decrease in the system *** addition to the reduction in system inertia,the transmission system in Great Britain(GB)faces some unique challenges owing to its relatively small capacity,while being decoupled from other transmission systems and with the renewable resources largely non-uniformly distributed across the *** paper presents opinions and insights on the challenges associated with frequency control in a low-inertia system and the potential solutions from a GB *** this paper,we focus on three main techniques that act over different time scales:synchronous condensers,inertia emulation,and fast frequency *** evaluate their relative advantages and limitations with learnings from recent research and development projects in GB,along with the opinions on their roles in addressing the frequency control challenges in future low-inertia systems.

关键词： Fast frequency control Inertia emulation Synchronous compensation Low-inertia systems

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An advanced discrete‐time RNN for handling discrete time‐varying matrix inversion:Form model design to disturbance‐suppression analysis

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CAAI Transactions on Intelligence Technology 2023年第3期8卷 607-621页

作者： Yang Shi Qiaowen Shi Xinwei Cao Bin Li Xiaobing Sun dimitrios K.Gerontitis School of Information Engineering Yangzhou UniversityYangzhouChina Jiangsu Province Engineering Research Center of Knowledge Management and Intelligent Service Yangzhou UniversityYangzhouChina School of Business Jiangnan UniversityWuxiChina Department of Information and Electronic Engineering International Hellenic UniversityThessalonikiGreece

Time‐varying matrix inversion is an important field of matrix research,and lots of research achievements have been *** the process of solving time‐varying matrix inversion,disturbances inevitably exist,thus,a model that can suppress disturbance while solving the problem is *** this paper,an advanced continuous‐time recurrent neural network(RNN)model based on a double integral RNN design formula is pro-posed for solving continuous time‐varying matrix inversion,which has incomparable disturbance‐suppression *** digital hardware applications,the corresponding advanced discrete‐time RNN model is proposed based on the discretisation *** a result of theoretical analysis,it is demonstrated that the advanced continuous‐time RNN model and the corresponding advanced discrete‐time RNN model have global and exponential convergence performance,and they are excellent for suppressing different ***,inspiring experiments,including two numerical experiments and a practical experiment,are presented to demonstrate the effectiveness and superiority of the advanced discrete‐time RNN model for solving discrete time‐varying matrix inversion with disturbance‐suppression.

关键词： neural control neural network real‐time systems

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