Conditioning a current source using OCCII-GIC for EIT systems

Multi-Frequency EIT has been developed to evaluate the permittivity spectrum of a medium using an improved Howland source. Stray capacitance reduces the output impedance, bandwidth of the data collection leading to erroneous measurements. To address this, we have designed a current source, which uses a novel OCCII - GIC to cancel stray capacitance. The system achieves high output impedance over a 5 MHz frequency range

A new species of Pachytrocha Kent, 1882 (Ciliophora, Peritrichia: Vaginicolidae)

Boshko, Elena G., Konstantynenko, Lyudmila A. (2009): A new species of Pachytrocha Kent, 1882 (Ciliophora, Peritrichia: Vaginicolidae). Zootaxa 2198: 61-66, DOI: 10.5281/zenodo.18956

Asymmetry of Caddo Ceramics from the Washington Square Mound Site: An Exploratory Analysis

While pursuing a study of 3D geometric morphometrics for ceramic burial vessels that often articulate with the Native American Graves Protection and Repatriation Act (NAGPRA) from the ancestral Caddo region, there have been no shortage of potentially meaningful observations, one of which--rotational asymmetry in coil-built vessels--is discussed here. Using Geomagic Design X (reverse-engineering software) and Geomagic Control X (inspection software), metrics associated with rotational asymmetry were generated then analyzed. Results indicate variable asymmetry among the different vessel shapes (i.e., bottles, jars, etc.), which may augment and strengthen studies and discussion of vessel form. Future directions include the incorporation of directional and--possibly--fluctuating asymmetry measures for the widest vessel profiles. Preliminary results point toward substantive analytical gains that can be used to augment more traditional ceramic analyses as well as geometric morphometric studies of ceramic vessel shape

Continuous, Semi-discrete, and Fully Discretized Navier-Stokes Equations

The Navier--Stokes equations are commonly used to model and to simulate flow phenomena. We introduce the basic equations and discuss the standard methods for the spatial and temporal discretization. We analyse the semi-discrete equations -- a semi-explicit nonlinear DAE -- in terms of the strangeness index and quantify the numerical difficulties in the fully discrete schemes, that are induced by the strangeness of the system. By analyzing the Kronecker index of the difference-algebraic equations, that represent commonly and successfully used time stepping schemes for the Navier--Stokes equations, we show that those time-integration schemes factually remove the strangeness. The theoretical considerations are backed and illustrated by numerical examples.Comment: 28 pages, 2 figure, code available under DOI: 10.5281/zenodo.998909, https://doi.org/10.5281/zenodo.99890

Political Violence in Nigeria and Its Implication for National Development

Political violence is a major impediment to Nigeria's national development. With the restoration to democratic rule in May 1999, high expectations were raised that the new democratic dispensation would resolve the risk of Nigeria's political violence, while speeding the country's economic and social transformation. It's worrying that since democratic rule returned, Nigeria has experienced a degree of unprecedented political violence that has crippled the efforts of national development. The fundamental thrust of this paper is to investigate the incidence of Nigeria's political violence and assess its national development consequences. The paper shows that political violence dissuades domestic and foreign investment in our economy, triggers government loss of revenue and resources, and results in the election of unqualified representatives to the detriment of the country's economic and social progress. This paper proposes reducing wages paid to political office holders, and politicians should strive to achieve national unity instead of growing religious and ethnic tensions. Lastly, National resources should also be equitably distributed by the government

Critique of Asouzu’s Notion of Ihe Mkpuchi Anya (the Phenomenon of Concealment)

This research work is a conscious participation in African philosophy, precisely on Asouzu’s notion of Ihe Mkpuchi Anya (The Phenomenon of Concealment). The work attempts to address some of the challenges of human ambivalent situations that are visible in the way we judge, act, will, value, conceive reality and so forth. In this work we argued that human beings are conscious beings. Due to this consciousness, their actions are difficult to predict. Actors themselves often act against their interests because of the unfathomable nature of their actions. Often time they cannot predict themselves, what appeared to be good from the onset may turn out to be bad once it is done. We deduced that if actors can sometimes act against their interests and/ or act to promote their most cherished interests, regardless of negative consequences then, there must be something responsible for that. We concluded that human beings act under the influence of ihe mkpuchi anya (the phenomenon of concealment). This phenomenon has the capacity to impair our vision, becloud our sights, affect the way we reason and cause us to pass wrong judgments on issues confronting us as individuals and/ or as a community. Finally, we recommended that human beings can act rightly by suppressing and avoiding things that are detrimental to him and or to another. It is only when man does the above recommended things that the society can grow harmoniously in every aspect. We employed the critical, analytical, expository and complementary methods in the course of researching