نتایج جستجو برای: Q49

تعداد نتایج: 39  

2003
Henry L. Bryant Michael S. Haigh Henry L Bryant

This research compares partial equilibrium and statistical time-series approaches to hedging. The finance literature stresses the former approach, while the applied economics literature has focused on the latter. We compare the out-of-sample hedging effectiveness of the two approaches when hedging commodity price risk using futures contracts. For various methods of parameter estimation and infe...

1999
Thomas Dierks David E.J. Linden Andreas Hertel Thomas Gunther Heinrich Lanfermann Andreas Niesen Lutz Frolich Friedhelm E. Zanella Gustav Hor Rainer Goebel Konrad Maurer

Ž . In a case of Huntington’s disease HD with dementia and pronounced parieto-frontal atrophy, the functional state Ž . of the affected regions was investigated using functional magnetic resonance imaging fMRI and fluorodeoxygluŽ . cose-positron emission tomography FDG-PET . It was observed that although parietal areas showed extensive atrophy and reduced resting glucose metabolism, the patient...

2008
Stefan Holdenrieder Rafael Molina Massimo Gion Axel Gressner Frédéric Troalen Jose Maria Auge Matelda Zancan Matthias Wycislo Petra Stieber

Background: Cancer antigen CA125 is known as a valuable marker for the management of ovarian cancer. Methods: The analytical and clinical performance of the Access OV Monitor Immunoassay System (Beckman Coulter) was evaluated at five different European sites and compared with a reference system, defined as CA125 on the Elecsys System (Roche Diagnostics). Results: Total imprecision (%CV) of the ...

2011
Jürgen Durner Ursula Winkler-Budenhofer Simon Gahr Walter Samtleben Ulf Schönermarck

Background: Blood gas analysis (BGA), including measurement of ionized calcium, is performed routinely in patients with end stage renal disease on renal replacement therapy, especially when using citrate for regional anticoagulation. After installation of a new blood gas analyzer (RAPIDpoint 405; BGA), we observed lower ionized calcium concentrations in a few patients without signs of hypocalce...

2013
Shilei Niu Margaret Insley

This paper uses a real options approach to examine the impact of ramping rate restrictions imposed on hydro operations to protect aquatic ecosystems. We consider the effect on hydro plant value in order to inform policy decisions. A novelty of the paper is in examining the optimal operation of a prototype hydro power plant with electricity prices modelled as a regime switching process. We show ...

2008
Petra Stieber Rafael Molina Massimo Gion Axel Gressner Frédéric Troalen Stefan Holdenrieder Jose Maria Auge Matelda Zancan Matthias Wycislo Véronique Jarrige

Background: Gastrointestinal cancer antigen CA19-9 is known as a valuable marker for the management of patients with pancreatic cancer. Methods: The analytical and clinical performance of the Access GI Monitor assay (Beckman Coulter) was evaluated on the UniCel DxI 800 Immunoassay System at five different European sites and compared with a reference method, defined as CA19-9 on the Elecsys Syst...

2008
P. Stieber Christine Gruber Rudolf Hatz Petra Stieber

We retrospectively studied the single and combined diagnostic value of carcinoembryonic antigen (CEA), cytokeratin fragment 19 (CYFRA 21-1), neuron specific enolase (NSE) and pro-gastrin-releasing peptide (ProGRP), which were routinely analysed in patients with lung tumours of unknown origin at the time of admission to hospital. Inclusion criteria were the determination of CEA (AxSYM/ Abbott), ...

2008
Rafael Molina Massimo Gion Axel Gressner Frédéric Troalen Jose Maria Auge Stefan Holdenrieder Matelda Zancan Matthias Wycislo Petra Stieber

Background: Cancer antigen CA15-3 antigen is known as a valuable marker for the management of breast cancer. Methods: The analytical and clinical performance of the Access BR Monitor Immunoassay System (Beckman Coulter) was evaluated at five different European sites and compared with a reference system, defined as CA15-3 on the Elecsys System (Roche Diagnostics). Results: Total imprecision (%CV...

ژورنال: :مجله تحقیقات اقتصادی 2005
دکتر ابراهیم حیدری

در این تحقیق میزان تقاضا یا مصرف نهایی حامل های سه گانه انرژی در بخش های تولیدی اقتصاد ایران شامل بخش صنعت، کشاورزی، خدمات و حمل و نقل با استفاده از یک الگوی تجزیه و برای یک دوره 15 ساله در قالب سه گزینه (نرخ رشدتولید بالا، پایین و روند) پیش بینی شده است.. نتایج پیش بینی تقاضای برق و گاز طبیعی نشان می دهد که در هر سه گزینه در طول سال های مورد پیش بینی با تشدید مصرف ناشی از عوامل ساختاری و شدت ا...

2001
Sharon Xiaowen Lin Michael N. Tamvakis

Price discovery in crude oil and refined oil products has been extensively undertaken in organised futures markets for over a decade now. There are two dominant such markets today: the first one in the New York Mercantile Exchange; and the second in London’s International Petroleum Exchange. With the demise of OPEC as the leading price setter for crude and products, NYMEX light sweet crude and ...

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