Variables in turbine erosion

Study of impact erosion in the operation of turbomachinery is undertaken to predict the results for particular designs. The test program investigates the effects of turbine stator blade shape, rotor blade shape, and variations in test conditions

Intellectual Property Rights, Product Complexity, and the Organization of Multinational Firms

This paper studies how the Intellectual Property Right (IPR) regime in destination countries influences the way multinationals structure the international organization of their production. In particular, we explore how multinationals divide tasks of different complexities across countries with different levels of IPR protection. The analysis studies the decision of firms between procurement from related parties and outsourcing to independents suppliers at the product level. It also breaks down outsourcing into two types by distinguishing whether or not they involve technology sharing between the two parties. We combine data from a French firm-level survey on the mode choice for each transaction with a newly developed complexity measure at the product level. Our results confirm that firms are generally reluctant to source highly complex goods from outside firm boundaries. By studying the interaction between product complexity and the IPR protection, we obtain that (i) for technology-sharing-outsourcing IPRs promote outsourcing of more complex goods to a destination country by guaranteeing the protection of their technology, (ii) for non-technology-related-outsourcing IPRs attract the outsourcing of less complex products that are more prone to reverse engineering and simpler to decodify and imitate.

Complexation of Secondary Amides to Chromium(III): the X-Ray Structure of a Molecule with Two Modes of Monodentate Organic Amide Co-ordination

The X-ray crystal structure of the dimer [Cr{H(chba-Et)}(py)_2]_(2)·2py [H_(4)(chba-Et)= 1,2-bis(3,5-dichloro-2-hydroxybenzamido) ethane, py = pyridine] establishes, for the first time, the existence of N-co-ordination of an organic amide to Cr^III, the N-atom and carbonyl O-atom of two separate amide groups being co-ordinated to each Cr^III centre [Cr–N 2.030(6) and Cr–O 1.976(5)Å]; the potentially tetra-anionic chelating ligand leads to a variety of co-ordination modes

Investigation of variables in turbine erosion, influence of aerodynamic and geometric parameters

Influence of aerodynamic and geometric parameters in turbine erosio

Results on Transversal and Axial Motions of a System of Two Beams Coupled to a Joint through Two Legs

In recent years there has been renewed interest in inflatable-rigidizable space structures because of the efficiency they offer in packaging during boost-to-orbit. However, much research is still needed to better understand dynamic response characteristics, including inherent damping, of truss structures fabricated with these advanced material systems. We present results of an ongoing research related to a model consisting of an assembly of two beams with Kelvin-Voight damping, coupled to a simple joint through two legs. The beams are clamped at one end but at the other end they satisfy a boundary condition given in terms of an ODE coupling boundary terms of both beams, which reflects geometric compatibility conditions. The system is then written as a second order differential equation in an appropriate Hilbert space  in which well-posedness, exponential stability as well as other regularity properties of the solutions can be obtained. Two different finite dimensional approximation schemes for the solutions of the system are presented. Numerical results are presented and comparisons are made.Fil: Burns, J. A.. Interdisciplinary Center for Applied Mathematics; Estados UnidosFil: Cliff, E. M.. Interdisciplinary Center for Applied Mathematics; Estados UnidosFil: Liu, Z.. University of Minnesota at Duluth; Estados UnidosFil: Spies, Ruben Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Matemática Aplicada del Litoral. Universidad Nacional del Litoral. Instituto de Matemática Aplicada del Litoral; Argentin

COLUMBIA MEDICAL CENTER AND THE COCAINE ADDICTED PHARMACIST (A)

Tom Zenor, a pharmacist for Columbia Medical Center, became addicted to cocaine. He checked himself into a rehabilitation center and, upon request, was placed on leave as allowed by the Family Medical Leave Act (FMLA). During his FMLA leave the company decided to terminate his employment upon the completion of his twelve week leave of absence. Columbia, in an attempt to be proactive, is considering any legal recourse Zenor might attempt. Columbia’s Human Resources manager, Carmen Estrada, is preparing evidence to defend the company against a potential Americans with Disabilities Act (ADA) lawsuit. Her primary concern is that Zenor will claim that his cocaine addiction is a qualified disability under the ADA. (Contact author for a copy of the complete report.)Personnel, Unjust Termination, At-Will Employment

Columbia Medical Center and the Cocaine-Addicted Pharmacist: Unjust Termination? (B)

Tom Zenor, a pharmacist for Columbia Medical Center, became addicted to cocaine. He checked himself into a rehabilitation center and, upon request, was placed on leave as allowed by the Family Medical Leave Act (FMLA). Upon his return, the company decided to terminate his employment. Zenor was upset at the dismissal, which he saw as unjust. Columbia Medical Center, in an attempt to be proactive, sought to consider any legal recourse Zenor might attempt. Columbia’s Human Resources manager, Carmen Estrada, attempted to construct evidence to defend the company against a potential unjust discharge case. The company operated in Texas, which was an “at-will” state. Nonetheless, Estrada had concerns which included whether Zenor could claim an exception to the Doctrine of Employment at-will, and if including a disclaimer in an employee handbook that employees are retained “at-will” provided adequate legal protection for the organization. (Contact author for a copy of the complete report.)Personnel, Addiction, ADA

Relatively computably enumerable reals

A real X is defined to be relatively c.e. if there is a real Y such that X is c.e.(Y) and Y does not compute X. A real X is relatively simple and above if there is a real Y <_T X such that X is c.e.(Y) and there is no infinite subset Z of the complement of X such that Z is c.e.(Y). We prove that every nonempty Pi^0_1 class contains a member which is not relatively c.e. and that every 1-generic real is relatively simple and above.Comment: 5 pages. Significant changes from earlier versio