Effect of stress and/or field annealing on the magnetic behavior of the „Co77Si13.5B9.5…90Fe7Nb3 amorphous alloy

Variations of coercive field, induced magnetic anisotropy, and saturation magnetostriction constant in sCo77Si13.5B9.5d90Fe7Nb3 amorphous ribbons submitted to stress and/or axial magnetic-field annealing are reported. The annealing was carried out by using the Joule-heating effect saverage temperature values of the sample corresponding to the intensity of the electrical current were 273, 378, 409, and 445 °Cd and the applied stress and axial magnetic field during the thermal treatments were 500 MPa and 750 A/m, respectively. As a result of these treatments, a uniaxial in-plane magnetic anisotropy, which affects drastically the soft magnetic character of the samples, was developed.Ministerio de Ciencia y Tecnología de España-MAT2001-0082-C04-0

Adequacy Criteria of Models of the Cargo Inspection System with Material Discrimination Option

Generalized adequacy criteria for mathematical models in order to discriminate materials in X-ray inspection systems by the dual-energy method were developed. Two main approaches of the examination systems to produce the adequacy criteria by the final and the intermediate parameters of the dual-energy method were analyzed. The criteria were specified in respect to the discrimination by the effective atomic number and by the method of level functions. Experimental and theoretical estimates of the discrimination parameters of the test object constituents scanned by fan beams of X-ray radiation with the maximal energies of 4.5 and 9 MeV are given

State of the Art and Development Trends of the Digital Radiography Systems for Cargo Inspection

Increasing requirements for technical parameters of inspection digital radiography systems are caused by increasing incidences of terrorism, drug trafficking and explosives via variety of transport. These requirements have determined research for new technical solutions that enable to ensure the safety of passengers and cargos in real-time. The main efforts in the analyzed method of testing are aimed at the creation of new and modernization of operated now systems of digital radiography as a whole and their main components and elements in particular. The number of these main components and elements includes sources of X-ray recording systems and transformation of radiometric information as well as algorithms and software that implements these algorithms for processing, visualization and results interpretation of inspection. Recent developments of X-ray units and betatrons used for inspection of small- and large-sized objects that are made from different materials are deserve special attention. The most effective X-ray detectors are a line and a radiometric detector matrix based on various scintillators. The most promising methods among the algorithms of material identification of testing objects are dual-energy methods. The article describes various models of digital radiography systems applied in Russia and abroad to inspection of baggage, containers, vehicles and large trucks

Adjustable Prone Trolley Design for People Suffering from Spinal Cord Injuries in Nepal

For people suffering from spinal cord injuries, it is important to stay active. However, with spinal cord injuries, the use of a wheelchair isn’t feasible. These patients require a prone trolley. A prone trolley is a horizontal pad with four wheels that a patient can maneuver and control while lying in a prone position. Our partner, International Nepal Fellowship (INF), deals directly with patients who suffer from spinal cord injuries on a daily basis. INF, a Christian, medical organization, manages a hospital in Pokhara, Nepal which specializes in treating patients with spinal cord injuries. The Nepal Prone Trolley Team’s goal is to provide our partner with a sustainable prone trolley design and create the required manufacturing documentation to enable them to produce the prone trolleys in country at their Green Pastures hospital. The team began our work by researching what a prone trolley is, how it functions and what is currently available. During the research, the team discovered that there weren’t many examples of a manually powered prone trolley or critical dimensions for ergonomics for manually powered trolleys. This drove the team to develop testing methods and preliminary designs specifically for INF. Various basic designs were considered, but, through communication with INF, a single design was chosen. Computer modeling of this design was used to decrease the overall weight of the trolley and simplify the frame. With most of the design finalized, the team is ready to begin prototyping next semester.https://mosaic.messiah.edu/engr2021/1012/thumbnail.jp

Bilateral synchronous occurrence of three different histological types of renal tumor: a case report

This is an Open Access article distributed under the terms of the Creative Commons Attribution Licens

Adjustable Prone Trolley Design for People Suffering from Spinal Cords Injuries in Nepal

For people who suffer from spinal cord injuries in Nepal, rehabilitation and care are often difficult to receive, especially for those for whom fewer resources are available. Thankfully, International Nepal Fellowship (INF), a non-profit serving Nepal for nearly 70 years, aids patients with spinal cord injuries at Green Pastures Hospital and Rehabilitation Centre in Pokhara, Nepal. A crucial part of any rehabilitation is adequate exercise to improve circulation and prevent sores and muscular atrophy. Yet, due to the nature of the injury, using a traditional wheelchair is not an option to fulfill this need for those with spinal cord injuries. Therefore, Green Pastures uses prone trolleys so that these patients can exercise. A prone trolley is a horizontal cushioned board where the patient lies flat on their stomach and is able to move themselves using the wheels attached to the cushioned board. Despite the importance of the prone trolley, the trolleys at Green Pastures Hospital have a few critical issues. The major issue is that the prone trolleys are internationally imported, which not only means that delivery can take months, but also that the trolleys are also difficult to repair when damaged. Both these factors severely hamper Green Pastures Hospital’s ability to provide spinal cord injured patients with the care they need. The Nepal Prone Trolley team, a part of Messiah University Collaboratory, seeks to develop and design a fundamentally better prone trolley for INF. The goal of our project is to design a prone trolley that can be fabricated by the INF staff with locally sourced materials. The advantage of this new design is that it will be easier to obtain and can easily be repaired when needed. After creating a design that satisfies our goal and fulfills the criteria of a functional prone trolley as defined by INF, we were able to fabricate a prototype of the prone trolley using resources and techniques available in Pokhara. Moving forward, we will conduct testing and redesign the trolley so that our finalized prone trolley design will be able to transform how Green Pastures Hospital aids their spinal cord injury patients. Funding for this work provided by The Collaboratory for Strategic Partnerships and Applied Research.https://mosaic.messiah.edu/engr2022/1011/thumbnail.jp

Brownian motion exhibiting absolute negative mobility

We consider a single Brownian particle in a spatially symmetric, periodic system far from thermal equilibrium. This setup can be readily realized experimentally. Upon application of an external static force F, the average particle velocity is negative for F>0 and positive for F<0 (absolute negative mobility).Comment: 4 pages, 3 figures, to be published in PR

Utilización de microhilos magnéticos para promover la muerte de células de osteosarcoma mediante hipertermia magnética in vitro

Los tratamientos para el cáncer que se llevan a cabo actualmente tienen una serie de limitaciones que, unido a que se trata de técnicas invasivas, hace que se tienda a buscar nuevas alternativas. Una de ellas es la hipertermia dirigida, cuyo objetivo son las células cancerígenas. Se trata de una técnica relativamente nueva, por lo que aún no se ha estudiado en profundidad. En este trabajo, se han utilizado microhilos magnéticos amorfos recubiertos de vidrio para calentar células de osteosarcoma aplicando un campo magnético alterno. De acuerdo con los resultados obtenidos de los ensayos realizados “in vitro”, se puede confirmar que la utilización de estos microhilos magnéticos reduce la proliferación de células cancerígenas dando lugar finalmente a la muerte celular. Además, esta técnica es un proceso mucho menos invasivo que los utilizados actualmente y que requiere exposiciones breves a campos magnéticos débiles. Por todo esto, la hipertermia dirigida se presenta como una alternativa efectiva para el tratamiento de osteosarcoma.Por último, agradecer a Tamag Ibérica S.L. por proporcionarnos los microhilos magnéticos para poder llevar a cabo este estudio y a Fomento de San Sebastián por financiar el proyecto de investigació

Improving the accuracy of modeling surface roughness profiles with regular microrelief

В данной статье рассматриваются вопросы повышения точности моделирования профиля шероховатости поверхности при регулярном характере микрорельефа. В качестве исходных данных для рассмотрения взяты поверхности, обработанные чистовой токарной обработкой и алмазным заглаживанием с жесткой фиксацией индентора. Модель шероховатости поверхности основана на использовании методологического аппаратафрактальной геометрии. Построение модели основано на использовании алгоритма случайного сложения. Исходными данными являются фрактальная размерность профиля и параметры закона распределения. Показано, что использование традиционных законов распределения случайных величин: нормального (Гаусса), Рэлея и Вейбуля не позволяет получить требуемую точность моделей.This article discusses the issues of improving the accuracy of surface roughness profile modeling in case of regular microrelief character. As initial data for consideration, surfaces treated with finishing turning and diamond smoothing with rigid fixation of the indenter are taken. The surface roughness model is based on the use of themethodological apparatus of fractal geometry. The construction of the model is based on the use of a random addition algorithm. The source data is the fractal dimension of the profile and the distribution law parameters. It is shown that the use of traditional laws of distribution of random variables: normal (Gauss), Rayleigh and Weibul does not allow obtaining the required accuracy of models

Ion Chambers for Monitoring the NuMI Neutrino Beam at FNAL

The Neutrinos at the Main Injector (NuMI) beamline will deliver an intense muon neutrino beam by focusing a beam of mesons into a long evacuated decay volume. The beam must be steered with 1 mRad angular accuracy toward the Soudan Underground Laboratory in northern Minnesota. We have built 4 arrays of ionization chambers to monitor the neutrino beam direction and quality. The arrays are located at 4 stations downstream of the decay volume, and measure the remnant hadron beam and tertiary muons produced along with neutrinos in meson decays. We review how the monitors will be used to make beam quality measurements, and as well we review chamber construction details, radiation damage testing, calibration, and test beam results.Comment: paper to appear in the proceedings of the 11th Beam Instrumentation Workshop, Oak Ridge, T