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Special issue： Development of renewable energy and smart grid

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Frontiers in Energy 2017年第2期11卷 105-118页

作者： schwarz, Harald Cai, Xiaoshu Brandenburg Univ Technol Cottbus Senftenberg Cottbus Germany Univ Shanghai Sci & Technol Grad Sch Shanghai Peoples R China Univ Shanghai Sci & Technol Coll Power Engn Shanghai Peoples R China

Germany,as well as China,conducted a variety of activities in the past decade to reduce CO2 in national power supply and strived to move to more renewable *** to geological differences in both countries,Germany established very fast a huge number of decentralized generation units from wind energy and *** from a technical point of view,these types of generation are highly fluctuating and not easily able to follow the power demand in the system minute by minute.

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Influence of increasing numbers of RE-inverters on the powerquality in the distribution grids： A PQ case study of arepresentative wind turbine and photovoltaic system

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Frontiers in Energy 2017年第2期11卷 155-167页

作者： Przemyslaw JANIk Grzegorz kOSOBUDZkI Harald schwarz Brandenburg University of Technology 01968 Cottbus-SenflenbergGermany Department of Electrical Engineering Wroclaw University of Scienceand Technology 50-370 Wroclaw Poland Department for Energy Distribution and High Voltage Engineering Brandenburg University of Technology 01968 Cottbus-SenftenbergGermany

This paper presents the selected power quality (PQ) indicia of a wind generator and a photovoltaic installation considered to be the representative of medium voltage and low voltage distribution grids. The analysis of measured values suggests that the decrease in PQ is a case of specific combination of distributed generation, grid parameters and load behaviour. Modern generators have a limited impact on PQ. On the other hand, fluctuations in power generation are regarded as an emerging PQ indicator. The growing number of distributed renewable installations causes stochastic, variable, and hardly predictable power flows in the distribution grid. The nature of fluctuations in wind and solar generation is different. In both cases, new indexes for the quantification of fluctuations are needed and are yet not standardised. Proper assessment of these fluctuations enables definition of useful fluctuation limits and rules for optimal storage system integration.

关键词： power quality harmonics sags photovoltaic(PV) system doubly feed induction generator (DFIG) inverters

Obesity and its influence on liver dysfunction,morbidity and mortality after liver resection

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Hepatobiliary Surgery and Nutrition 2023年第5期12卷 704-714,I0018页

作者： Stephanie kampf Michael Sponder Fabian Fitschek Daniel Laxar Martin Bodingbauer Carina Binder Stefan Stremitzer klaus kaczirek Christoph schwarz Division of Visceral Surgery Department of General SurgeryMedical University of ViennaViennaAustria Division of Cardiology Department of Internal Medicine IIMedical University of ViennaViennaAustria Clinical Institute of Pathology Medical University of ViennaViennaAustria

Background:Obesity and associated steatosis is an increasing health problem *** influence on post-hepatectomy liver failure(PHLF)and after liver resection(LR)is still ***:Patients who underwent LR were investigated and divided into three groups[normal weight:body mass index(BMI)18.5-24.9 kg/m2,overweight:BMI 25.0-29.9 kg/m2,obese:BMI≥30 kg/m2]in this retrospective *** aim of this study was to assess the influence of BMI and nonalcoholic steatohepatitis(NASH)on PHLF and ***:Of 888 included patients,361(40.7%)had normal weight,360(40.5%)were overweight,167(18.8%)were *** age was 62.5 years(IQR,54-69 years).The primary indication for LR was colorectal liver metastases(CLM)(n=366,41.2%).NASH was present in 58(16.1%)of normal weight,84(23.3%)of overweight and 69(41.3%)of obese patients(P<0.001).PHLF occurred in 16.3%in normal weight,15.3%in overweight and 11.4%in obese patients(P=0.32).NASH was not associated with *** was no association between patients’weight and the occurrence of postoperative complications(P=0.45).At multivariable analysis,solely major LR[odds ratio(OR):2.7,95%confidence interval(CI):1.83-4.04;P<0.001]remained a significant predictor for ***:Postoperative complications and PHLF are comparable in normal weight,overweight and obese patients and LRs using modern techniques can be safely performed in these patients.

关键词： Obesity liver resection(LR) post-hepatectomy liver failure(PHLF) morbidity

Integrated energy in Germany-A critical look at the development and state of integrated energies in Germany

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Frontiers in Energy 2018年第4期12卷 493-500页

作者： Saman AMANPOUR Daniel HUCk Mark kUPRAT Harald schwarz Energy Distribution and High Voltage Engineering Faculty 3Brandenburg University of Technology Cottbus-SenftenbergCottbus 03013Germany

In the face of global warming and a scarcity of resources, future energy systems are urged to undergo a major and radical transformation. The recognition of the need to embrace renewable energy technologies and to move toward decarbonization has led to significant changes in the German energy generation, consumption and infrastructure. Ambitious German national plans to decrease carbon dioxide emissions on one side, and the unpredictable and volatile nature of renewable energy sources on the other side have elevated the importance of integrated energies in recent years. The deployment of integrated technologies as a solution to interlink various infrastructures creates opportunities for increasing the reliability of energy systems, minimizing environmental impacts and maximizing the share of renewable resources. This paper discusses the role of integrated energy systems in supporting of sustainable solutions for future energy transitions. Moreover, the reinforcement of this movement with the help of different technologies will be discussed and the development of integrated energy systems in Germany will be reviewed.

关键词： integrated energy renewable energies energy transition power-to-gas power-to-heat power-to-mobility energy storage

Interband cascade technology for energy-efficient mid-infrared free-space communication

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Photonics Research 2023年第4期11卷 582-590页

作者： PIERRE DIDIER HEDWIG kNÖTIG OLIVIER SPITZ LAURENT CERUTTI ANNA LARDSCHNEIDER ELIE AWWAD DANIEL DIAZ-THOMAS ANBARANOV ROBERT WEIH JOHANNES kOETH BENEDIkT schwarz FRÉDÉRIC GRILLOT LTCI Télécom Paris Institut Polytechnique de ParisPalaiseau 91120France mirSense Centre d’intégration NanoInnovPalaiseau 91120France Institute for Solid State Electronics TU Wien1040 ViennaAustria Currently with CREOL College of Optics and PhotonicsUniversity of Central FloridaOrlandoFlorida 32816USA Institut d’Electronique et des Systèmes Universitéde MontpellierCNRS UMR 5214Montpellier 34000France Nanoplus Nanosystems and Technologies GmbH 97218 GerbrunnGermany Center for High Technology Materials University of New MexicoAlbuquerqueNew Mexico 87106USA

Space-to-ground high-speed transmission is of utmost importance for the development of a worldwide broadband ***-infrared wavelengths offer numerous advantages for building such a system,spanning from low atmospheric attenuation to eye-safe operation and resistance to inclement weather *** demonstrate a full interband cascade system for high-speed transmission around a wavelength of 4.18μ*** low-power consumption of both the laser and the detector in combination with a large modulation bandwidth and sufficient output power makes this technology ideal for a free-space optical communication *** proof-of-concept experiment employs a radio-frequency optimized Fabry–Perot interband cascade laser and an interband cascade infrared photodetector based on a type-II InAs/GaSb *** bandwidth of the system is evaluated to be around 1.5 *** allows us to achieve data rates of 12 Gbit/s with an on–off keying scheme and 14 Gbit/s with a 4-level pulse amplitude modulation *** quality of the transmission is enhanced by conventional pre-and post-processing in order to be compatible with standard error-code correction.

关键词： communication system free

New species and unexpected diversity of socially parasitic bees in the genus Inquilina Michener （Hymenoptera： Apoidea： Apidae）

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Insect Science 2009年第4期16卷 343-350页

作者： Jaclyn A. Smith Michael P. schwarz Flinders University School of Biological Sciences Adelaide South Austrafia Australia

Allodapine bees present particular problems for taxonomy due to a high level of morphological conservatism in adults, even between genera. However, this tribe of bees also presents a unique opportunity to explore the evolution of social parasitism because of the comparatively large number of origins of socially parasitic species. Morphological differences presented here, along with DNA sequence data and molecular phylogenetic analyses, indicate a much larger number of Australian social parasite species in the genus Inquilina than previously anticipated, and suggest that the final number of socially parasitic species may be considerable. We describe five new species and present sequence data that will help elucidate the delineation of further new species. Inquilina provides a unique opportunity to study the evolution of social parasitism in social insects, but further studies will need to encompass both population genetic and phylogenetic approaches.

关键词： Allodapine bee molecular phylogenetics social parasite

Impact of a physician-supervised exercise-nutrition program with testosterone substitution in partial androgen-deficient middle-aged obese men

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Journal of Geriatric Cardiology 2011年第4期8卷 201-206页

作者： Ernst R schwarz Robert D Willix Jr Cenegenics Education and Research Foundation Las Vegas and Heart Institute of Southern CaliforniaBeverly Hills348 S Oakhurst DrBeverly HillsCA 90212USA

Background Partial androgen deficiency syndrome in the aging male is associated with signs of aging such as a development of abdominal obesity,sexual dysfunction,increase body fat,weight gain and the development of cardiac *** We assessed the outcome of a commercially available physician supervised nutrition and exercise program with concomitant testosterone replacement therapy in middle age obese men with partial androgen deficiency in order to reduce cardiac risks *** Fifty-six self referred men without diabetes mellitus,hypertension,or cardiovascular disease(ages 52.3±7.8 years)were randomly selected from a large *** weight,body fat composition,fasting glucose,hemoglobin A1c and fasting lipid levels,as well as free and total testosterone levels were *** patients were assessed and followed 6–18 months after initiation of the *** program consisted of a low glycemic load balanced nutrition diet,a recommended structured daily exercise program of 30–60 minutes,as well as once to twice weekly intramuscular testosterone injections(113.0±27.8 mg).Results At follow up,weight was reduced from 233.9±30.0 pounds(lbs)to 221.3±25.1 lbs(Pkg/m2 to 31.3±2.8 kg/m^(2)(Pk factors such as glucose intolerance and hyperlipidemia.

关键词： aging heart disease androgen deficiency testosterone

Heart failure in the elderly-some aspects in pathophysiology,diagnosis and therapy that require special attention

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Journal of Geriatric Cardiology 2007年第1期4卷 44-49页

作者： Ernst R. schwarz Division of Cardiology and Comprehensive Transplant Center Department of Medicine Cedars Sinai Medical Center & University of California Los Angeles (UCLA) Los Angeles California USA

Approximately 50% of all heart failure patients in the US are above 75 years of age, which is almost similar to most European countries and the Middle and the Far East. Even though aging is an independent molecular process with a multitude of genetic predetermination and biochemical mediations, aging itself does not automatically result in cardiac insufficiency. On the other hand, with increasing age, cardioprotective mechanisms in response to stress are lost, and progressive cardiomyocyte degeneration with replace- ment fibrosis is often seen in older hearts, even though the exact triggers are not completely understood. Older patients with heart failure have distinct features that require special attention in diagnosis as well as therapy. The elderly more frequently suffer from multiple co-morbidities and might have atypical clinical presentations. Several precautions are essential in the treatment of heart failure in the elderly due to co-existing morbidities and the pharmacokinetic and pharmacodynamic changes related to increased age. Also, treatment expectations, compliance, mental status and cognitive function might play a major role regarding optimized treatment and monitoring options in the elderly suffering from heart failure. This review summarizes current issues of heart failure management in the elderly.

关键词： heart failure aging left ventricular function mortality elderly

ODS & Modal Testing Using a Transmissibility Chain

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Sound & Vibration 2018年第2期52卷 2-7页

作者： Brian schwarz Patrick McHargue Mark Richardson Vibrant Technology Inc. Centennial CO United States

In this paper, we show how Operating Deflection Shapes (ODS’s) andmode shapes can be obtained experimentally from measurements thatare made using only two sensors and two short wires to connect them to amulti-channel acquisition system. This new test procedure is depicted inFigure 1. Not only is the equipment required to do a test much more costeffective, but this method can be used to test any sized test article, especiallylarge ones.

关键词： Fourier spectrum (DFT) Auto power spectrum (APS) Crosspower spectrum (XPS) Frequency Response Function (FRF) OperatingDeflection Shape (ODS) Experimental Mode Shape (EMA Mode) OperationalMode Shape (OMA Mode) Modal Assurance Criterion (MAC) ShapeDifference Indicator (SDI)