Deformation Quantization in Singular Spaces

We present a method of quantizing analytic spaces $X$ immersed in an arbitrary smooth ambient manifold $M$. Remarkably our approach can be applied to singular spaces. We begin by quantizing the cotangent bundle of the manifold $M$. Using a super-manifold framework we modify the Fedosov construction in a way such that the $\star$-product of the functions lifted from the base manifold turns out to be the usual commutative product of smooth functions on $M$. This condition allows us to lift the ideals associated to the analytic spaces on the base manifold to form left (or right) ideals on (\mc{O}_{\Omega^1 M}[[\hbar]],\starl) in a way independent of the choice of generators and leading to a finite set of PDEs defining the functions in the quantum algebra associated to $X$. Some examples are included.Comment: 14 page

Comparative study of Sustainability Metrics for Face Milling AISI 1045 in different Machining Centers

Comunicación presentada a MESIC 2019 8th Manufacturing Engineering Society International Conference (Madrid, 19-21 de Junio de 2019)The objective of this study is to compare a set of sustainability metrics between different manufacturing resources applied to high performances machining centers. The research compares distributed scenarios in order to find the optimal conditions that allow the minimum consumed power and the minimum roughness when performing face milling operations of AISI 1045 steel. The set of experiments for the surface machining was carried out considering different path strategies in three main directions for two dimensional movements of the tool. The selected experiments considered the main axis movement, the perpendicular axis movement and a 45 degrees movement. Besides, it was considered the feed rate speed and the cutting depth. The design of experiments was developed with the Taguchi method considering an orthogonal matrix of L27 design type, and three levels of experimental design, and the analysis of variance and noise signal were performed. The methodology to determine the lowest power consumed and the best surface quality allowed to establish the working condition in the most sustainable machining. The results show how the cutting parameters influence in each manufacturing resource

Gravitational Wave Signatures of Highly Magnetized Neutron Stars

Motivated by the recent gravitational wave detection by the LIGO-VIRGO observatories, we study the Love number and dimensionless tidal polarizability of highly magnetized stars. We also investigate the fundamental quasi-normal mode of neutron stars subject to high magnetic fields. To perform our calculations we use the chaotic field approximation and consider both nucleonic and hyperonic stars. As far as the fundamental mode is concerned, we conclude that the role played by the constitution of the stars is far more relevant than the intensity of the magnetic field and if massive stars are considered, the ones constituted by nucleons only present frequencies somewhat lower than the ones with hyperonic cores, a feature that can be used to point out the real internal structure of neutron stars. Moreover, our studies clearly indicate that strong magnetic fields play a crucial role in the deformability of low mass neutron stars, with possible consequences on the interpretation of the detected gravitational waves signatures.Comment: 24 pages, 4 figures, 6 table

Biochemical and functional characteristics of the photosynthetic apparatus in vegetative buds and mature needles of Norway spruce (Picea abies L. Karst.)

The biochemical characteristics and functioning of the photosynthetic apparatus in two developmental stages of spruce needles (vegetative buds and mature needles) were compared. Biochemical analysis included quantification of the photosynthetic pigments and immunodetection of the NAPDH-protochlorophyllide oxidoreductase (POR). Photosynthetic performance was monitored as the oxygen production at different light levels applied. Two POR isoforms were detected in buds while only one isoform was present in mature needles. The POR polypeptides in buds were expressed at different levels: the polypeptide of lower molecular mass had a level that was more enhanced than that of higher molecular mass. The most intensive POR signal was observed in mature needles. Concentrations of chlorophylls and carotenoids that were higher in mature needles than in vegetative buds were in accordance with observed POR expression. This reflected on the photosynthetic activity of the investigated organs. Although the chloroplasts in vegetative buds revealed the capability of photosynthesising, the compensation of respiration was not observed even at the highest light level (1100 molPHOTONS m–2s–1) applied. In contrast, mature needles ompensated for respiration successfully at low light level (30 molPHOTONS m–2s–1). Our study showed that chloroplasts in vegetative buds are photosynthetically competent, but limited by their molecular and biochemical background

Factors that generate effective teams

The journey to prosper competitively in the millennium will demand teamwork. The use of a team-based structure in organizations is no longer just a surplus tool to enhance service quality in the operation. In today\u27s developed economies, the use of effective teams has proven to be essential for helping businesses to have continued prosperity and success on a long-term basis. Further, building teams has shown means for organizations to differentiate from competition, once copying human capabilities is not easy as copying technologies advancements. Therefore, in an environment of constant change, organizations must have perseverance and courage to stay on course with the evolution of teams. Implementing a team is not so difficult, but making the team effective is a real challenge. When teams do not achieve effectiveness it may be a waste of time, but when teams become effective they might generate outcomes that were though intangible before. The objective of this project is to assist the reader in appraising the team building concepts in order to bring more effectiveness to the overall organization. The study includes examination of relevant literature from books and articles collected from abstracts, periodicals, and journals related to team building. This study includes as well as the results of interviews with business personnel in Ithaca and Rochester, NY concerning what factors generate effective teams. The results collected from these interviews were transcript and analyzed against the primary research and the differences and matching findings between these researches were discussed

Solubilities of Tetraphenylphosphonium and Tetraphenylarsonium Perchlorate and Gravimetric Perchlorate Determination

The solubilities of tetraphenylphosphonium and tetraphenylarsonium perchlorate in water were determined at various temperatures, between 5 °c and 100 °c. Tetraphenylphosphonium perchlorate is slightly less soluble than tetraphenylarsonium perchlorate. The concentrations of these substances in saturated solution at 20 °c are (5.2 ± 0.1) x 10-5 and (5.6 ± 0.1) x 10-5 mol dm-3, respectively. The solubilities in aqueous sodium chloride and sodium sulfate at 20 °c were determined over a wide range of salt concentrations. Gravimetric determination of perchlorate with tetraphenylphosphonium chloride on micro and semimicro scale is described. The details of the procedure are given and possible sources of error are discussed