The electron plasma - Experiment theory and applications

Production, stability, and control of pure electron and electron rich plasmas - crossed field electron bea

An Ethnoarchaeological Model for the Identification of Prehistoric Tepee Remains in the Boreal Forest

The deliberate observation of contemporary northern hunters is one way of enhancing the interpretation of the archaeological record in the western Canadian Subarctic. The paper is based on six months of archaeological ethnography at a residential hunting camp in the mid-Mackenzie Valley, Northwest Territories, Canada, followed by archaeological excavations at the same camp of Dene hunters. The conceptual framework of this research is ethnoarchaeology, which encompasses the theoretical and methodological aspects of a comparing ethnographic and archaeological data. A model for identifying teepee remains in the absence of surficial architectural remains is presented, based on the excavation of a currently occupied tepee at the hunting camp. This model consists of a number of attributes, ranging from a central hearth to subterranean storage facilities. The probability that tepee architecture is present increases with every attribute that can be documented archaeologically. The presence or absence of architectural remains is essential in the identification of site function, and site function is the key to reconstructing the regional settlement pattern in pre-ethnographic times. There is a certain urgency in integrating first-hand accounts of northern hunters with the archaeological record, as opportunities to do so continue to dwindle with the passage of time and the ever-increasing pace of culture change in the western Canadian Subarctic.Key words: ethnoarchaeology, archaeology, ethnography, archaeological methodology, Northern Athapaskan, Dene, Mackenzie Valley, SubarcticMots clés: ethnoarchéologie, archéologie, enthnographie, méthodologie archéologique, Athapaskan septentrional, Déné, vallée du Mackenzie, subarctiqu

The Preservation and Ethnohistory of a Frozen Historic Site in the Canadian Arctic

In 1853 a British Naval Expedition, involved in the search for the missing British Naval Northwest Passage Expedition under the command of Sir John Franklin, constructed a stone storehouse on Dealy Island off the coast of Melville Island, Northwest Territories. This storehouse was stocked with a complete inventory of supplies used in mid-19th century arctic exploration. Excellent documentary sources pertaining to the origin and the abandonment history of this site indicate that it underwent a series of diverse alterations since its abandonment. Many of these alterations were found to be archaeologically invisible. The extant remains would have resulted in a crippling misinterpretation of the facts had written records not been available. Because of the conservation problems posed by this extraordinarily large and rich collection of frozen material, traditional archaeological approaches were rejected. Instead, the structure and its contents were preserved in situ by a multidisciplinary team of archaeologists, conservators and architects. It is hoped that the underlying philosophy of this approach and some of the techniques used are applicable to other frozen sites. Examination of the historical record and available archaeological data indicates that the Dealy Island site played an insignificant role as an agent culture change among the historic Inuit. Several factors are considered in arriving at this conclusion, including British ethnocentrism, the logistical requirements of naval exploration and the abandonment of the High Arctic by indigenous peoples during the Neo-Boreal climatic episode.Key words: historic archaeology, conservation, ethnohistory, frozen-site archaeologyMots clés: conservation, archéologie, historique, ethnohistoire, archéologie de sites en proie au ge

The Savegre: Completing the Case Study

Since case studies garner the interest of students necessary for engagement in general biology classes (Himschoot, 2012), the purpose of this project was to create a case study based on the history of San Gerardo de Dota, Costa Rica and Leo and Zana Finkenbinder’s involvement in its transition to sustainability. Travel to Costa Rica occurred in the summer of 2015. Authors Aggie Veld and Emilie Janes presented the story of the case study and progress to date during Honors Week 2016. Since then, the case study was submitted to SUNY Buffalo’s National Center for Case Study Teaching in Science. Feedback included specific recommendations which have been completed to prepare for publication. The presentation will highlight the events leading to the creation of the case, and the preparation to publish the joint efforts of Veld and Janes

PDBMD2CD: Providing Predicted Protein Circular Dichroism Spectra from Multiple Molecular Dynamics-Generated Protein Structures

PDBMD2CD is a new web server capable of predicting circular dichroism (CD) spectra for multiple protein structures derived from molecular dynamics (MD) simulations, enabling predictions from thousands of protein atomic coordinate files (e.g. MD trajectories) and generating spectra for each of these structures provided by the user. Using MD enables exploration of systems that cannot be monitored by direct experimentation. Validation of MD-derived data from these types of trajectories can be difficult via conventional structure-determining techniques such as crystallography or nuclear magnetic resonance spectroscopy. CD is an experimental technique that can provide protein structure information from such conditions. The website utilizes a much faster (minimum ∼1000×) and more accurate approach for calculating CD spectra than its predecessor, PDB2CD (1). As well as improving on the speed and accuracy of current methods, new analysis tools are provided to cluster predictions or compare them against experimental CD spectra. By identifying a subset of the closest predicted CD spectra derived from PDBMD2CD to an experimental spectrum, the associated cluster of structures could be representative of those found under the conditions in which the MD studies were undertaken, thereby offering an analytical insight into the results. PDBMD2CD is freely available at: https://pdbmd2cd.cryst.bbk.ac.uk

The production of BeV potential wells

Production of billion electron volt potential wells by cloud of electrons suspended in magnetic fiel

The Effect of an Online Journal Club on Fieldwork Educators’ Perspectives on Student Professionalism

This study examined the effect of an online journal club on fieldwork educators’ perspectives on student professionalism. Fieldwork educators participated in a five-week journal club on the topic of professionalism. Thirty-nine fieldwork educators completed the experience, which entailed a pre-posttest survey, reading one article, and participating in a weekly, asynchronous discussion. Ratings of confidence in supervising students who exhibit unprofessional behaviors increased at a statistically significant level from pretest to posttest. Qualitative themes are presented for pre-posttest questions, in addition to the weekly discussion responses. An online journal club for fieldwork educators increased self-ratings of confidence in supervising students who exhibit unprofessional behaviors, cultivated discussion on how to best convey their expectations of professionalism to their students, and facilitated enrichment of their concept of professionalism within the field of occupational therapy