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Search Results: 1 - 10 of 211415 matches for " L Werner "
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Selective Reduction of Dimedone
Ulla Létinois,Werner Bonrath
Sustainability , 2009, DOI: 10.3390/su1020209
Abstract: The selective hydrogenation of dimedone (1) to the corresponding monoketone 2 over palladium and Amberlyst 15? is reported. The product is a synthetic building block for the fragrance and pharmaceutical industry. Advantages of the new catalytic procedure are the high catalyst activity and selectivity, less by-product formation, avoidance of the presence of acid, and consequently, less salt formation due to the omission of a neutralization step. Using a substrate/catalyst ratio of >100 compound 2 can be synthesized in 97% yield at full conversion. Recycling of the catalyst several times has been shown to be feasible without any detectable decrease in selectivity.
Executing Strategy with the Balanced Scorecard
Michael L. Werner,Fuyuan Xu
International Journal of Financial Research , 2012, DOI: 10.5430/ijfr.v3n1p88
Abstract: In order for organizations to succeed, it is important that managers establish clearly defined overall goals, core values, a vision of the future, and also develop a workable strategy to achieve these things. But simply having a good strategy in place does not guarantee that it will be successfully executed. The balanced scorecard, developed by Harvard professor Robert Kaplan and consultant David Norton, can help business leaders manage their businesses and help them achieve full execution of their strategies through the use of objectives, measures, targets, and initiatives. Instead of focusing solely on financial objectives, the balanced scorecard is an integrated set of performance measures organized around four distinct perspectives – financial, customer, internal, and innovation and learning. This paper explores business overall goals and mission, core values, vision, and strategy. Then the focus shifts to strategy execution through the use of the balanced scorecard.
Resistively shunted Josephson junctions: QFT predictions versus MC results
Sergei L. Lukyanov,Philipp Werner
Physics , 2007, DOI: 10.1088/1742-5468/2007/06/P06002
Abstract: During the last fourteen years several exact results were obtained for the so-called boundary sine-Gordon model. In the case of a conformal bulk this 2D boundary quantum field theory describes the universal scaling behavior of the Caldeira-Leggett model of resistively shunted Josephson junctions. In this work, we use a recently developed Monte Carlo technique to test some of the analytical predictions.
Universal scaling behavior of the single electron box in the strong tunneling limit
Sergei L. Lukyanov,Philipp Werner
Statistics , 2006, DOI: 10.1088/1742-5468/2006/11/P11002
Abstract: We perform a numerical analysis of recently proposed scaling functions for the single electron box. Specifically, we study the ``magnetic'' susceptibility as a function of tunneling conductance and gate charge, and the effective charging energy at zero gate charge as a function of tunneling conductance in the strong tunneling limit. Our Monte Carlo results confirm the accuracy of the theoretical predictions.
Técnicas para la preparación de ojos de cadáver utilizadas para practicar cirugía intraocular del segmento anterior Techniques for preparing postmortem human eyes to perform anterior segment intraocular surgery
LG Vargas,L Werner,SK Pandey,LP Werner
Archivos de la Sociedad Espa?ola de Oftalmología , 2003,
Abstract: Describimos las técnicas para preparar ojos humanos o animales obtenidos postmortem empleados en el Centro de Investigaciones en Terapéutica Ocular y Bio-implantes, Storm Eye Institute, Medical University of South Carolina, Charleston, SC, EE.UU. Estas técnicas han sido utilizadas para prácticar diferentes procedimientos quirúrgicos (facoemulsificación, extracción extracapsular de cristalino, etc.), y para el entrenamiento de cirujanos en transición. La práctica de estas técnicas en el laboratorio ha contribuido a mejorar la habilidad quirúrgica para realizar los pasos críticos de la cirugía de facoemulsificación. La evaluación patológica de los globos humanos pseudofáquicos obtenidos postmortem mediante la técnica posterior de Miyake-Apple, y el análisis histológico han sido fundamentales en el estudio de complicaciones postoperatorias de cirugía de catarata (opacidad de cápsula anterior, opacidad de cápsula posterior) secundarias a proliferación postoperatoria de células epiteliales del cristalino dentro del saco capsular. Las modificaciones en las técnicas quirúrgicas y en el dise o de las lentes intraoculares han ayudado a disminuir estas complicaciones postoperatorias. El implante de diferentes tipos de lentes afáquicos y fáquicos en ojos humanos y animales obtenidos postmortem ha permitido un mejor análisis del tama o y la posición de nuevos dise os de lentes dentro del ojo. We describe different methods to prepare postmortem human or animal eyes used at the Center for Research in Ocular Therapeutics and Biodevices at the Storm Eye Institute, Medical University of South Carolina, Charleston, SC, USA. These techniques have been utilized for performing different surgical procedures (phacoemulsification, extracapsular cataract extraction, etc.), and for training of surgeons in-transition. Performing these techniques in the wet-laboratory contributed to improve surgical skills to perform the critical steps of the phacoemulsification surgery. Pathological evaluation of pseudophakic postmortem human eyes using the Miyake-Apple posterior view and histology was helpful to analyze postoperative complications of cataract surgery (anterior capsule opacification and posterior capsule opacification) secondary to postoperative proliferation of lens epithelial cells into the capsular bag. Modifications in the surgical techniques and/or lens design may be helpful to reduce these postoperative complications. Implantation of various aphakic and phakic intraocular lenses in postmortem human eyes as well as animal eyes was helpful to analyze the sizing and fitting of
Mathematical Rotordynamic Model Regarding Excitation Due to Elliptical Shaft Journals in Electrical Motors Considering the Gyroscopic Effect  [PDF]
Ulrich Werner
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.48A009
Abstract:

The paper presents a mathematical rotordynamic model regarding excitation due to elliptical shaft journals in sleeve bearings of electrical motors also considering the gyroscopic effect. For this kind of excitation, a mathematical rotordynamic model was developed considering the influence of the oil film stiffness and damping of the sleeve bearings, the stiffness of the end-shields and bearing housings, the stiffness of the rotor, the electromagnetic stiffness in the air gap of the electrical motor and the mass moment of inertia of the rotor and therefore also considering the gyroscopic effect. The solution of the linear differential equation system leads to the mathematical description of the absolute orbits of the shaft centre, the shaft journals and the bearing housings and to the relative orbits between the shaft journals and the bearing housings. Additionally, the bearing housing velocities can also be derived with this mathematical rotordynamic model.

Dependence of Gravity Induced Absorption Changes on the Earth’s Magnetic Field as Measured during Parabolic Flight Campaigns  [PDF]
Werner Schmidt
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.411190
Abstract:

Various spectroscopic experiments performed on the AIRBUS ZERO G—located in Bordeaux, France—in the years 2002 to 2012 exhibit minute optical reflection/absorption changes (GIACs) as a result of gravitational changes between 0 and 1.8 g in various biological species such as maize, oats, Arabidopsis and particularly Phycomyces sporangiophores. During a flight day, the AIRBUS ZERO G conducts 31 parabolas, each of which lasts about three minutes including a period of 22 s of weightlessness. So far, we participated in 11 parabolic flight campaigns including more than 1000 parabolas performing various kinds of experiments. During our campaigns, we observed an unexplainable variability of the measuring signals (GIACs). Using GPS-positioning systems and three dimensional magnetic field sensors, these finally were traced back to the changing earth’s magnetic field associated with the various flight directions. This is the first time that the interaction of

Gravireception in Phycomyces: Threshold Determination on the Sounding Rocket TEXUS 50  [PDF]
Werner Schmidt
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.610143
Abstract: Under parabolic flight conditions microgravity is not lower than 3 to 5 times 10-2 g. In contrast to parabolic flights, sounding rocket flights are virtually vibrational-free allowing microgravity as low as 10-5 g. Thus, a rotating platform serving as centrifuge allows the precise generation of gravitational forces ranging from 5 to 100 mg (not possible during parabolic flights). On this basis we determined the threshold1 for optical reflection/absorption changes in Phycomyces to be lower than 25 × 10-3 g. This compares well with the threshold determination of gravitropism in Phycomyces on a clinostat centrifuge. Kinetics of gravity-induced absorption changes and gravity as generated by the on-board centrifuge do not coincide but show a distinctive hysteresis with a latency of 4 s (75 mg-ramp, pull-up).
Leptinus Americanus Leconte Taken on aShrew (Coleoptera-Leptinid )
F. G. Werner,R. L. Edwards
Psyche , 1948, DOI: 10.1155/1948/86908
Abstract:
The effects of a media campaign on beliefs and utilization of imaging examinations in Norwegian patients with low back pain
Erik L. Werner,Douglas P. Gross
Norsk Epidemiologi , 2009,
Abstract: Aims: Several authors have reported an overuse of imaging examinations for unspecific low back pain conditions. In this study, we examined the influence of a media campaign for better understanding and management of back pain in the general population on utilization of imaging examinations. Methods: The media campaign Active Back ran for three years (2002-2005) in two Norwegian counties and the results were compared to the adjacent control county. Numbers of imaging examinations were collected manually from every radiology department in each of the three counties, while belief measures were collected through a telephone survey before, during and after the campaign. Beliefs of the health care providers were collected through questionnaires. Results: We observed a decrease of X-rays by 35% in the intervention counties and by 33% in the control county. The number of CT scans decreased by 51% and 57% respectively. The number of MRI scans increased by 152% in the intervention counties and by 596% in the control. Combining all modalities, the number of imaging examinations increased by 3% in the intervention counties and by 56% in the control county. There was a tendency both in the general public and among the health care providers towards less trust in the usefulness of X-rays in all counties during the study period. The health care providers in the control county seemed to recommend imaging more often than their colleagues in the intervention counties. Conclusion: Despite slightly increased scepticism among the general public and health care providers, we observed an overall increase in utilization of imaging modalities. The dramatically increased utilization in the control group was likely explained by an increased capacity for MRI examinations obtained by the opening of a new radiology clinic, and not as an effect of the media campaign.
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