The interplay between Fano and Fabry–Pérot resonances in dual-period metagratings

We study theoretically and numerically the occurrence of Fano resonances in a metagrating made of slits with some symmetry breaking resulting in a dual period. At low frequency, a grating composed of long enough slits supports Fabry–Pérot resonances on which Fano resonances superimpose when the grating acquires dual period. The resulting spectrum exhibits flat-banded peaks interrupted by sharp dips with successions of perfect and zero transmissions. To model these scattering properties, homogenization theory is used resulting in an effective problem governing the solutions in the two, non-identical, slits, which are coupled through jump conditions at the grating interfaces. These jumps efficiently encode the effect of the evanescent field able to resonate in the radiative region due to the folding of the spoof plasmon polaritons branches. The model is validated with direct numerics and a local analysis allows us to characterize the resonant mechanisms.

DISCOVERING THE TRUTH OF COVID 19 AND OTHER CONTAGIOUS DISEASES BY APPLICATION OF THE THEORY OF CHANGES AND THE THEORY OF YIN YANG

The current pandemic COVID-19 continues to spread rapidly around the world. Many countries are still at the peak of infection. The prolonged lockdown has caused a serious impact on the socio-economy of the whole world. There is a growing concern about the link between animal's based food product with all the contagious diseases as most of the pandemic are initiated from farming animals. The micro study of the virus or bacteria could trace the infectious pathway of the contagious diseases and find substantial problem-solving solutions. Nevertheless, the root cause of the diseases remained unknown. Because of this, it is essential to evaluate the root cause of the disease in the macro-scope of study. By discovering the designated function of all the microorganisms from the insight perspective of the Theory of Changes and other Taoism theories, we could define the effective problem-solving solution. The result of the finding has discovered that the microorganisms which bring the so called “contagious diseases” are the cure for Mother Nature to resume its equilibrium. They are the agents of decomposition and transformation of Mother Nature. Coronavirus, other viruses, and bacteria are the essential microorganisms being created by nature to decompose the excessive animals’ dead bodies that awash in the environment into smaller particles or subtracts, transforming them into useful nutrients to be absorbed and restored by Mother earth. After identifying the deadly microorganism as the cure for Mother Nature and recognizing the harm that we have done to Mother Nature, we could find out the root cause of the problem and solve the problem fundamentally.

ASP (): Answer Set Programming with Algebraic Constraints

Weighted Logic is a powerful tool for the specification of calculations over semirings that depend on qualitative information. Using a novel combination of Weighted Logic and Here-and-There (HT) Logic, in which this dependence is based on intuitionistic grounds, we introduce Answer Set Programming with Algebraic Constraints (ASP($\mathcal A \mathcal C$)), where rules may contain constraints that compare semiring values to weighted formula evaluations. Such constraints provide streamlined access to a manifold of constructs available in ASP, like aggregates, choice constraints, and arithmetic operators. They extend some of them and provide a generic framework for defining programs with algebraic computation, which can be fruitfully used e.g. for provenance semantics of datalog programs. While undecidable in general, expressive fragments of ASP($\mathcal A \mathcal C$) can be exploited for effective problem solving in a rich framework.

Factors influencing swift and effective resolution of supplier problems

PurposeHow might an organization swiftly resolve supplier problems such that the issue does not reoccur? The purpose of this study seeks to understand the impact of different knowledge-sharing routines on measures of effective problem resolution.Design/methodology/approachData are collected from an automotive manufacturer's (buyer) database. A hierarchical linear model analyzes dyadic data collected from 155 problems across 24 suppliers.FindingsThis study reveals that different ways of communicating have differing impact on measures of effective problem-solving. Communication involving face-to-face interaction slows the process, whereas frequent communication can lead to swift resolution. Furthermore, management teams are more likely to lead to a “better” fix in that these teams are more likely to implement changes in the process or product.Research limitations/implicationsThe data are for a tier-one automotive supplier. Hence, the findings are limited by the extent to which other organizations may differ.Practical implicationsThe results provide insights for managers experiencing supply issues. Some forms of communication should be encouraged as they enhance the process. Moreover, the findings suggest there are consequences to pressuring a supplier to resolve a complaint quickly.Originality/valueVery few researchers can claim to have investigated observed collaborative mechanisms that occur between a buyer and its suppliers when resolving a problem. This research adds to the literature on the relational view theory as it applies to supply chain management and problem resolution.

The Development of Learning Model Through Problem Based Introduction (PBI) on Student’s Motivation Improvement in Mathematics Education

The formulations of the study conclude into two aspects, that are: (1) How effective problem-based introduction (PBI) model for mathematics education students' motivation FKIP UMSU; (2) Does the learning model through Problem-Based Introduction provides a significant improvement on students' motivation. The objectives of this study were: (1) To determine the effectiveness of the problem-based introduction (PBI) model on mathematics education students' motivation in FKIP UMSU, (2) To increase the motivation for mathematics education students to FKIP UMSU through a problem-based introduction (PBI) model. From the results of the research carried out by developing a learning device based on a problem-based introduction (PBI) model to improve the learning motivation of mathematics education students at FKIP UMSU. From the hypothesis calculation data obtained t count > t table is 4,803 > 2,005 so that Ho rejected and Ha is accepted.

Teaching Interdisciplinary Archaeology: Our Students as Our Future Agents of Change

I discuss my experiences using archaeology and anthropology to teach college-level students how to be interdisciplinary thinkers and doers. Although the number of students who complete archaeology and anthropology degrees is relatively small in the United States and worldwide, programs and courses in such fields offer any student important opportunities in active, interdisciplinary learning that contribute to effective problem-solving using multiple lines of information. Courses and learning activities can question stereotypes depicting archaeology as a “useless” discipline (Arendt 2013:79), and they can prepare students to engage in and adapt to countless personal and professional situations while also learning about archaeology, its benefits, and its potential for relationships with similar and different fields. Therefore, the active learning of multimethod, interdisciplinary archaeology can prepare college-level students to address change and uncertainty in their homes, communities, and professions.