Embracing Bacterial Cellulose as a Catalyst for Sustainable Fashion

Bacterial cellulose is a leather-like material produced during the production of Kombucha as a pellicle of bacterial cellulose (SCOBY) using Kombucha SCOBY, water, sugar, and green tea. Through an examination of the bacteria that produces the cellulose pellicle of the interface of the media and the air, currently named Komagataeibacter xylinus, an investigation of the growing process of bacterial cellulose and its uses, an analysis of bacterial cellulose’s properties, and a discussion of its prospects, one can fully grasp bacterial cellulose’s potential in becoming a catalyst for sustainable fashion. By laying the groundwork for further research to be conducted in bacterial cellulose’s applications as a textile, further commercialization of bacterial cellulose may become a practical reality

Differential description and irreversibility of depolarizing light-matter interactions

The widely-used Jones and Mueller differential polarization calculi allow non-depolarizing deterministic polarization interactions, known to be elements of the $SO^+(1,3)$ Lorentz group, to be described in an efficient way. In this Letter, a stochastic differential Jones formalism is shown to provide a clear physical insight on light depolarization, which arises from the interaction of polarized light with a random medium showing fluctuating anisotropic properties. Based on this formalism, several "intrinsic" depolarization metrics naturally arise to efficiently characterize light depolarization in a medium, and an irreversibility property of depolarizing transformations is finally established

Improved-Accuracy Source Reconstructionon Arbitrary 3-D Surfaces

This paper presents a novel formulation of the source reconstruction problem on arbitrary three-dimensional (3-D) surfaces based on integral equations. Rigorous boundary integral field identities are employed to enforce that the two unknown currents are Maxwellian on the reconstruction surface; this leads to a dual integral-equation formulation, in contrast to the single-equation formulation found in literature. Numerical tests against reference currents allow a quantitative assessment of the improvements in accuracy afforded by the novel formulation, with important benefits in diagnostic application

Bayesian Credibility for GLMs

We revisit the classical credibility results of Jewell and B\"uhlmann to obtain credibility premiums for a GLM using a modern Bayesian approach. Here the prior distributions can be chosen without restrictions to be conjugate to the response distribution. It can even come from out-of-sample information if the actuary prefers. Then we use the relative entropy between the "true" and the estimated models as a loss function, without restricting credibility premiums to be linear. A numerical illustration on real data shows the feasibility of the approach, now that computing power is cheap, and simulations software readily available

El olor de la manzana

Estremecida tu abeja pupilar miro el vértigo en mis dedos mientras colibrea entre tus silencios un rápido atisbo a los lunares que orbitan nebulosos por tu plexo. Por tus tatuajes mis enjambres súbitamente cometan cruzando el nublado páramo de tu lascivia, apagada por la estrella del día. Y afuera, sin café amargo, estallan tal papalotes sin viento, los enjambres de tu mirada, impasible. Tus enjambres me picotean las orillas lolitas del frío, mientras me ansío las manos tallando las aristas de tu nombre

THE MEXICAN PESO AND THE KOREAN WON REAL EXCHANGE RATES: EVIDENCE FROM PRODUCTIVITY MODELS

Using the U.S. as benchmark country, Korean data from 1970:1 to 2000:4 and Mexican data from 1983:1 to 2000:4 are decomposed into traded and non-traded sectors. We find that the traditional purchasing power parity (PPP) model performs remarkably well for the Peso and that the productivity model appears adequate for the Peso but not for the Won. As Mexican relative traded goods productivity rises, the nominal Peso appreciates (coefficients between -2.03 and -2.16). Conversely, as U.S. relative traded goods productivity rises, the Peso depreciates (coefficients between 2.06 and 2.48). Although predicting correctly the direction of change, such large magnitudes suggest only partial support for the theoretical mechanism in Mexico. Coefficients with contrary signs obtained in Korea may indicate competing models (neoclassical or Ricardian) are more appropriate to capture the relationship between productivity and exchange rates.Cointegration, Non-traded Goods, Traded Goods, Traditional PPP, Productivity Models