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Selected AbstractsIncorporating power system security into market-clearing of day-ahead joint energy and reserves auctionsEUROPEAN TRANSACTIONS ON ELECTRICAL POWER, Issue 2 2010J. Aghaei Abstract This paper is intended to introduce a technique for incorporating system security into the clearing of day-ahead joint electricity markets, with particular emphasis on the voltage stability. A Multiobjective Mathematical Programming (MMP) formulation is implemented for provision of ancillary services (Automatic Generation Control or AGC, spinning, non-spinning, and operating reserves) as well as energy in simultaneous auctions by pool-based aggregated market scheme. In the proposed market-clearing structure, the security problem, as an important responsibility of ISO, is addressed and a nonlinear model is formulated and used as the extra objective functions of the optimization problem. Thus, in the MMP formulation of the market-clearing process, the objective functions (including augmented generation offer cost, overload index, voltage drop index, and loading margin) are optimized while meeting AC power flow constraints, system reserve requirements, and lost opportunity cost (LOC) considerations. The IEEE 24-bus Reliability Test System (RTS 24-bus) is used to demonstrate the performance of the proposed method. Copyright © 2008 John Wiley & Sons, Ltd. [source] Managing comorbidity in patients with rheumatoid arthritisINTERNATIONAL JOURNAL OF RHEUMATIC DISEASES, Issue 3 2008Vicky LU Abstract Rheumatoid arthritis (RA) is a chronic inflammatory disease that decreases physical function and imposes substantial medical costs. Comorbid conditions are common in patients with RA and they adversely affect quality of life and RA-related outcomes such as work disability and mortality. Rheumatologists have the important responsibility to consider comorbidities and their risks when treating patients and to adapt therapies to the specific situation of individual patients. This paper discusses the common comorbidities in patients with RA and management approaches. [source] Importance of a canteen lunch on the dietary intake of acrylamideMOLECULAR NUTRITION & FOOD RESEARCH (FORMERLY NAHRUNG/FOOD), Issue 5 2007Frédéric Mestdagh Abstract A food and drink intake survey was carried out among university students and staff members. Consumption data were collected on days when the participants took hot lunch in a university canteen. The dietary acrylamide exposure was calculated through a probabilistic approach and revealed a median intake of 0.40 ,g/kg bw/day [90% confidence interval: 0.36,0.44], which is in accordance with previous exposure calculations. Biscuits (35.4%), French fries (29.9%), bread (23.5%), and chocolate (11.2%) were identified to be the main sources of dietary acrylamide. Foodstuffs consumed in between the three main meals of the day (so called snack type foods) contributed the most to the intake (42.2%). The exposure was lower in an intervention group which received free portions of fruit and vegetables, indicating that a nutritionally balanced diet may contribute to a decreased acrylamide intake. French fries had a significant impact on the acrylamide intake, due to the frequent consumption in the canteen. This demonstrates the important responsibility of caterers and canteen kitchens in the mitigation of acrylamide exposure through reduction of acrylamide in their prepared products, in particular in French fries. [source] Medical professionalism and the clinical anatomistCLINICAL ANATOMY, Issue 5 2006Herbert M. Swick Abstract Medical professionalism has become an important issue for medical education and practice. The core attributes of professionalism derive from the roles and responsibilities of professions and from the nature of medicine as a healing profession. In medical education, most of the focus on professionalism has been directed to the clinical arena, yet it is critically important that the attributes of professionalism be manifested in basic science courses,especially anatomy,as well as in clinical experiences, because the transformation from medical student to physician begins at the outset of medical school. Throughout history, anatomists have exemplified many of the attributes and values of professionalism, and clinical anatomists today still have much to offer. Anatomy faculty have an important responsibility to nurture and exemplify professionalism. Clin. Anat. 19:393,402, 2006. © 2005 Wiley-Liss, Inc. [source] |