Stable fixation of an osseointegated implant system for above-the-knee amputees: titel RSA and radiographic evaluation of migration and bone remodeling in 55 cases.

Background and purposeRehabilitation of patients with transfemoral amputations is particularly difficult due to problems in using standard socket prostheses. We wanted to assess long-term fixation of the osseointegrated implant system (OPRA) using radiostereometric analysis (RSA) and periprosthetic bone remodeling.Methods51 patients with transfemoral amputations (55 implants) were enrolled in an RSA study. RSA and plain radiographs were scheduled at 6 months and at 1, 2, 5, 7, and 10 years after surgery. RSA films were analyzed using UmRSA software. Plain radiographs were graded for bone resorption, cancellization, cortical thinning, and trabecular streaming or buttressing in specifically defined zones around the implant.ResultsAt 5 years, the median (SE) migration of the implant was -0.02 (0.06) mm distally. The rotational movement was 0.42 (0.32) degrees around the longitudinal axis. There was no statistically significant difference in median rotation or migration at any follow-up time. Cancellization of the cortex (plain radiographic grading) appeared in at least 1 zone in over half of the patients at 2 years. However, the prevalence of cancellization had decreased by the 5-year follow-up.InterpretationThe RSA analysis for the OPRA system indicated stable fixation of the implant. The periprosthetic bone remodeling showed similarities with changes seen around uncemented hip stems. The OPRA system is a new and promising approach for addressing the challenges faced by patients with transfemoral amputations

Interviews with Lola Adams Carter and Ivan & Lillian Breidenstein

Lola Adams Carter of the Prairieview School district near Dodge City, KS along with a group of 16 former schoolteachers and students relate various party games played by children in the one-room schools and sings some popular songs. Bettie Westerhaus Nebergall interviews Ivan and Lillian Breidenstein and Ivah Westerhaus of Marion, KS about their experiences growing up as homesteaders in western Kansas in the early 20th century. 00:00:54 - Introductions 00:02:50 - Miller Boy 00:03:52 - Way Down in the Holler 00:04:39 - We\u27re Marching \u27Round the Levee 00:06:06 - Weevilly Wheat 00:07:28 - Here Goes Topsy Through the Window 00:08:25 - Down the Ohio 00:09:16 - Pig in the Parlor 00:10:17 - Paw Paw Patch 00:11:26 - Three Little Girls a\u27 Skating Went 00:12:55 - Skip To My Lou 00:16:01 - Captain Jinks 00:16:49 - Nita Juanita 00:18:09 - Prairie View Literary Society 00:21:02 - Ivan and Lillian Breidenstein interviewed by Bettie Nebergall 00:21:26 - Grandparent\u27s immigration to the United States and moving to Kansas 00:23:42 - Grandfather\u27s failed farm in Butler County 00:25:11 - Prospect School in El Dorado, KS 00:26:36 - After leaving school in the 8th grade 00:27:02 - Common entertainment in the period 00:29:58 - Pranks 00:35:01 - Discipline 00:35:28 - Experiences with Indigenous Americans 00:37:20 - Availability of medical care 00:38:33 - Local churches 00:39:07 - Toys 00:39:38 - Price of goods 00:41:36 - Westerhaus side of the family 00:47:47 - Tobacco spitting incident 00:50:55 - Common entertainment in the period 00:51:42 - Discipline 00:53:41 - Time as a telegraph operator 00:58:05 - Grandfather Westerhaus\u27s Civil War servicehttps://scholars.fhsu.edu/sackett/1005/thumbnail.jp

ARCHITECTURAL AND PSYCHOLOGICAL ASPECTS IN OPTIMIZED RADIATION SHIELDING DESIGN FOR SPACE APPLICATIONS

NewSpace bears all the hallmarks of past revolutions in technology. Since we have other examples of exponential growth of specific technologies, we should maximize the economic and engineering potential of this movement by expanding the envelopes for long term crewed habitats in deep space. We should also take an approach that minimizes waste in both design and fabrication as these bases expand. This paper provides a systematic approach to habitats optimized for volume, radiation protection, crew psychology, reusability, affordability, crowd-sourced subsystem design, and expansion. These habitats and systems are designed to be as “future proof” as possible to allow rapid and safe technological advancement within the structures. One of major “showstoppers” of human space exploration is cosmic and solar events radiation. It is a serious problem that may cause cancer and other types of tissue damage and equipment malfunction. It has to be addressed in space vehicles design especially for long-term space exploration missions and future Moon or Mars surface settlements. This paper discusses a unique layered system incorporated into a habitat structure, which may help to reduce the radiation hazard to the crew and interior equipment and systems. The paper also argues that a successful mitigation of radiation impact on human health should be based on a multidisciplinary methodology that also includes psychophysiological approach to the problem. Multiple techniques and practices to minimize psychological stress that may suppress immune system and reduce resistance to cancer, are presented and compared. Conclusions are drawn upon results of those comparisons and a multidisciplinary design concept is proposed to be applied both in long-duration human space exploration missions and in radioactive environment on Earth

Decision procedures for capital rationing under conditions of risk

The problem of deciding exactly how to allocate a limited amount of capital resources among competing investment alternatives in order to provide the greatest economic benefit to the business enterprise has been a subject of interest for nearly a century. Many decision models and methods for evaluation and comparison of alternatives have been described in the various business, economic, accounting, and engineering journals. The purpose of this thesis is twofold: First, to review the significant literature concerning capital budgeting written during the past 15 or 20 years, with the intent on highlighting and organizing the material. Second, to select an area within the field where little work has yet been done, or where the treatment has been less than satisfactory. In regards to the second part of the over-all objective of the thesis, the development of a game board for simulating the risk surrounding possible investment payoffs is described. A capital rationing problem containing essential elements of real-world situations is developed and described in detail. The main thrust of the present paper is a new approach to finding the "best" solution to this type of capital rationing problem encountered under conditions of risk. Drawing on basic principles of cardinal utility theory, a quantitative investment policy is presented. The investment criterion used is the before-taxes percentage rate of return; decision rules are based on an evaluation of the risk-return profile curve for each alternative under consideration. Parameter values for probability coefficients and for critical rate of return values are arbitrarily established for a hypothetical risk-seeker, risk-avoider, and risk-insensitive. The investment decisions based upon their individual risk preferences is presented for data developed in the sample problem. Finally, the results of an investigation as to how individuals actually make decisions (that is, what decision-rules they use) in problems of this type are given, and suggestions for further research are made

Metallic nanoscale conductors

A new, reproducible method of using electromigration to form metallic nano-conductors is developed using gold and a tin-silver alloy. Measurements revealed a quantization of the electrical conductance consistent with the theory of quantum conductance. The theory of quantum conductance is applied to show that a nano-conductor with a cross-section of only 12 or 13 atoms was created

The Taxation of E-Commerce: Transcript from the 1999 Judge James R. Browning Symposium

The Taxation of E-Commerc

The Taxation of E-Commerce: Transcript from the 1999 Judge James R. Browning Symposium

The Taxation of E-Commerc

Draft genome sequences for seven Streptococcus Parauberis Isolates from Wild Fish in the Chesapeake Bay

Streptococcus parauberis is a pathogen of cattle and fish, closely related Streptococcus uberis and Streptococcus iniae. We report the genomes of seven S. parauberis strains recovered from striped bass (Morone saxatilis) in the Chesapeake Bay. The availability of these genomes will allow comparative genomic analysis of Chesapeake Bay S. parauberis strains versus S. parauberis cultured from other animal hosts and geographic regions

PRACTICAL DESIGN EXAMPLES FOR HUMAN HABITATS IN SPACE, OFF-GRID, AND IN LOW-IMPACT COMMUNITIES

All human habitat problems fall into three major categories- the environment, the habitat itself, and the occupants. By breaking these problems down into common themes and addressing them directly, we can build a common knowledge base for all three challenges faced by humanity. A crew living in space has the new problems of coping with radiation, microgravity, and vacuum. All the while, they are dealing the usual issues of eating, sleeping, and getting along with the rest of the occupants. By isolating the differences between space and earth habitats, we can create common architectural styles for each human habitat challenge where commonality is appropriate. We can then examine the differences, then isolate and modularize the secondary systems where possible. This simplifies experimentation and testing of the physical and psychological design of a structure on Earth prior to attempting use in space. It also allows spin-off architectures for extreme environments, off-grid settlements, research bases, and low impact communities on Earth. By isolating and testing each attribute of the system in parallel with control groups, we can scientifically refine the systems for human shelter regardless of environment. This paper will show numerous examples of architectures designed for space or space analog research bases. These designs can be both de-scoped to off-grid sustainable architecture, and scoped up for space habitat applications. Concepts such as internal greenhouses, enclosed permaculture, thermal protection, energy management, and radiation shielding are included for both minimal habitats and large bases. These systems can then be applied for disaster first responders, research bases in extreme environments, o-grid homes, and low-impact communities