Sensing and decision-making in random search

While microscopic organisms can use gradient-based search to locate resources, this strategy can be poorly suited to the sensory signals available to macroscopic organisms. We propose a framework that models search-decision making in cases where sensory signals are infrequent, subject to large fluctuations, and contain little directional information. Our approach simultaneously models an organism's intrinsic movement behavior (e.g. Levy walk) while allowing this behavior to be adjusted based on sensory data. We find that including even a simple model for signal response can dominate other features of random search and greatly improve search performance. In particular, we show that a lack of signal is not a lack of information. Searchers that receive no signal can quickly abandon target-poor regions. Such phenomena naturally give rise to the area-restricted search behavior exhibited by many searching organisms

The Unresolved Land Reform Debate: Beyond State-Led or Market-Led Models

Land Reform; Debate; State-Led; Market-Led; Model

On the theory of Gamma Ray Amplification through Stimulated Annihilation Radiation (GRASAR)

The theory of photon emission, absorption, and scattering in a relativistic plasma of positrons, electrons, and photon was studied. Expressions for the emissivities and absorption coefficients of pair annihilation, pair production, and Compton scattering are given and evaluated numerically. The conditions for negative absorption were investigated. In a system of photons and e(+) - e(-) pairs, an emission line at at approximately 0.43 MeV can be produced by grasar action provided that the pair chemical potential exceeds approximately 1 MeV. At a temperature of approximately 10 to the 9th power. This requires a pair density approximately 10 to the 30th power cm to the (-3) power a value much larger than the thermodynamic equilbrium pair density at this temperature. This emission line could account without a gravitational redshift for the observed lines at this energy from gamma ray bursts

Alien Registration- Mckinley, Robert M. (Union, Knox County)

https://digitalmaine.com/alien_docs/12977/thumbnail.jp

The Justice (Or Lack Thereof) of Brain Augmentation Through Nanotechnology

Currently, the majority of the ethical discussion around the expansive field of brain augmentation centers on the concept of cognitive enhancement, defined by Bostrom and Sandberg (2009) as, “the amplification or extension of core capacities of the mind through improvements or augmentation of internal or external information processing systems.” But if this definition sounds broad and vague, that’s because it is. Part of the difficulty in discussing this field of neuroscience, and the controversy surrounding it, is making quite clear what specifically we are talking about to begin with. As Austin Caras and James DeJesus introduced in Ethical Analysis of Brain Augmentation Through Nanotechnology, methods of brain augmentation, a term which will be used here synonymously with the term cognitive enhancement, are abundant and diverse. The authors suggested that they would use a utilitarian lens to evaluate how nanotechnologies, a particular category of brain augmentations, would impact our society, but I believe they miss the mark here. While they give a compelling summary of the possibilities of this technology, they fail to do more than scratch the surface of the ethical implications surrounding their use. I intend to address one component I believe they have missed here, through my own evaluation and application of utilitarian justice

Alien Registration- Mckinley, Hattie M. (Lee, Penobscot County)

https://digitalmaine.com/alien_docs/7807/thumbnail.jp

Excavations at the Viking Barrow Cemetery at Heath Wood, Ingleby, Derbyshire

The cemetery at Heath Wood, Ingleby, Derbyshire, is the only known Scandinavian cremation cemetery in the British Isles. It comprises fifty-nine barrows, of which about one-third have been excavated on previous occasions, although earlier excavators concluded that some were empty cenotaph mounds. From 1998 to 2000 three barrows were examined. Our investigations have suggested that each of the barrows contained a burial, although not all contain evidence of a pyre. A full report of the 1998-2000 excavations is provided, alongside a summary of the earlier finds. The relationship of Heath Wood to the neighbouring site at Repton is examined, in order to understand its significance for the Scandinavian settlement of the Danelaw. It is concluded that Heath Wood may have been a war cemetery of the Viking Great Army of AD 873-8