Search results for "current"

CHILDHOOD: WHAT WE UNDERSTAND AND DO NOT UNDERSTAND

2019

"What is childhood?" - an educated person today would answer that childhood is the stage of a child’s growing up to achieve social maturity and becoming a  responsible member of society. A person when he/she is at the life period between infancy and youth is not recognized as an adult (Hanson, 2009). Blonsky noted that 33% of a person’s life-span belongs to his/her childhood (Blonskis, 1920). The stages of human childhood are a product of history. These are subject to changes just like thousands of years ago. Historically, childhood is not mainly related to the state of biological maturity, but to the specific social status of a person which manifests itself in the roles of duties and right…

Design of MOS Current Mode Logic Gates – Computing the Limits of Voltage Swing and Bias Current

2005

Minimizing a quality metric for an MCML gate, such as power-delay product or energy-delay product, requires solving a system of nonlinear equations subject to constraints on both bias current and voltage swing. In this paper, we will show that the limits of the swing and the bias current are affected by the constraints on maximum area and maximum delay. Moreover, methods for computing such limits are presented.

Minimum power-delay product design of MCML gates

2008

This paper describes a methodology for the minimization of the power-delay product of MCML gates. The method is based on the novel concept of crossing point capacitance. The methodology was been validated by designing several gates using in an IBM 130 nm CMOS process.

Symptoms and the body: Taking the inferential leap

2017

The relationship between the conscious experience of physical symptoms and indicators of objective physiological dysfunction is highly variable and depends on characteristics of the person, the context and their interaction. This relationship often breaks down entirely in the case of "medically unexplained" or functional somatic symptoms, violating the basic assumption in medicine that physical symptoms have physiological causes. In this paper, we describe the prevailing theoretical approach to this problem and review the evidence pertaining to it. We then use the framework of predictive coding to propose a new and more comprehensive model of the body-symptom relationship that integrates ex…

CFD prediction of concentration polarization phenomena in spacer-filled channels for Reverse Electrodialysis

2014

Abstract Salinity Gradient Power generation through Reverse Electrodialysis (SGP-RE) is a promising technology to convert the chemical potential difference of a salinity gradient into electric energy. In SGP-RE systems, as in most membrane processes, concentration polarization phenomena may affect the theoretical driving force and thus the performance of the process. Operating conditions, including the feed solution flow rate and concentration and the channels׳ geometrical configuration, may greatly influence both the polarization effect and the pumping energy consumption. The present work uses CFD to investigate the dependence of concentration polarization and pressure drop on flow rate, f…

Two-step principal component analysis (PCA) as a method for separating auditory N1 and N250 elicited from 9-year-old children using a dense electrode…

2008

Managing Organizational Growth and Dynamic Complexity

2016

Managers, entrepreneurs and administrators are often reluctant to invest time in order to frame the future of their own organization. They may look too much focused on reducing the complexity of current management. The vision of the future they create in their own minds may remain unchanged even for many years, or may incrementally and ambiguously change, with no effort on learning, on perceiving the early symptoms of crises, and assessing the sustainability of organizational growth rate.

Trends and cycles in U.S. job mobility

2021

Recent studies document a decline in U.S. labor-market fluidity from as early as the 1970s on. Making use of the Annual Social and Economic (ASEC) supplement to the Current Population Survey (CPS), I uncover a pronounced increase in job-to-job mobility from the 1970s to the 1990s, i.e., the annual share of continuously employed job-to-job movers rises from 5.9 percent of the labor force in 1975–1979 to 8.8 percent in 1995–1999. Job-to-job mobility exhibits a downward trend only since the turn of the millennium. In order to provide a formal economic interpretation, I additionally estimate the parameters of the random on-the-job search model. Furthermore, I document that job-to-job mobility h…

Current density maps, magnetizability, and nuclear magnetic shielding tensors of bis-heteropentalenes. II. Furo-furan Isomers

2004

Magnetic susceptibility and nuclear magnetic shielding at the nuclei of bis-heteropentalenes formed by two furan units ([2,3-b], [3,2-b], [3,4-b], and [3,4-c] isomers) have been computed by several approximated techniques and a large Gaussian basis set to achieve near Hartree–Fock estimates. Ab initio models of the ring currents induced by a magnetic field normal to the molecular plane were obtained for the three isomeric systems of higher symmetry, showing that the π electrons give rise to intense diamagnetic circulation. The π currents are responsible for enhanced magnetic anisotropy and strong out-of-plane proton deshielding. The theoretical findings are used to build up a “diatropicity …

How nitrogen modifies the nuclear magnetic shielding in tetraazanaphthalenes

2009

Although for planar conjugated hydrocarbons the out-of-plane component of proton magnetic shielding is an unquestionable quantitative aromaticity indicator, the same is not true for tetraazanaphthalenes. As in these compounds the (core + sigma)-currents associated to the nitrogen nuclei diminish the perpendicular component of shielding, abnormal values of (1)H NMR sigma(zz) are obtained. Therefore, a consistent aromaticity measure must be based only on the pi-contribution to the out-of-plane component of proton magnetic shielding. Otherwise, the behavior of these compounds in presence of an external magnetic field parallels that of naphthalene, with the nitrogen nuclei contributing to the r…