Electroshock protection circuit

Circuit was developed to prevent accidental shock through electrodes used to test subjects as part of Skylab program. This circuit is placed between electrical apparatus and electrode that is attached to patient's body. Thus, patient is effectively protected from dangerous electrical shock that might be caused by failure in electrical apparatus

Alien Registration- Heskett, Jessie (Gardiner, Kennebec County)

https://digitalmaine.com/alien_docs/29180/thumbnail.jp

Effects and Outcomes of Different Laboring Positions and the Influence from Societal Norms

Background Within labor and delivery, every birth is different. Alarmingly, the U.S. has the highest maternal mortality rate, including death during labor, among developed countries (World Health Organization, 2022). Many maternal deaths may be preventable. In the U.S., the use of forceps, vacuum-assisted birth, episiotomies, and emergency C-sections are common for women during childbirth. Even though some laboring positions may assist birthing more than others, there often is resistance to allowing various positions due to outside influences, including societal norms, hospital management, and healthcare professional training. Women in labor are vulnerable and look to their nurses for support during the birthing process. Nurses who know the potential effects of different positions can support the laboring mother and may be able to offer guidance to improve birthing outcomes. Objectives To compare and contrast the effects and outcomes of different laboring positions used worldwide. To explore how societal norms in the United States affect the standard positions that are used today. Methods A literature review was performed of primary studies to examine different labor positions and methods. A meta-analysis, randomized control trials, and other well-designed studies were chosen for closer scrutiny. Different laboring positions worldwide as well as the standard methods that are used in the U.S. were investigated. Results In the U.S., the standard method to deliver vaginally is lying in a recumbent/semi-recumbent position to allow easy access for the healthcare providers. Studies have shown that other positions such as squatting, side-lying, or being on hands and knees can have many benefits to help the mother during delivery including easing pain, faster delivery, and better fetal and maternal outcomes. In many societies, these other positions are used routinely, but the U.S. is one of the only countries that does not use these alternative positions. Labor practices that are used in other countries may help inform care for women during labor. Proposal for further research The research question that then arises is: If the U.S. changes its standards of vaginal births and uses more alternative birthing positions, could there be better maternal and fetal outcomes? A study to help answer this question will be proposed

Thinking outside the box: An introspective look at the use of art in teaching geometry

Geometry is typically thought of as a discipline in mathematics that is taught using formulas and basic shapes, but this idea is only the beginning. Geometry can be combined with art to enhance mathematical lessons for students. Educators must realize that visual representations of different mathematical concepts are a wonderful way to teach children geometry in a meaningful way. The “fundamental notion that integrating the arts into one’s teaching can help facilitate learning in the mathematics classroom, as the arts can recapture the wonder of learning mathematics. The connection between instruction and imagination is bridged and learning becomes play, and play becomes learning” (Muller and Ward 22). This paper includes 7 lessons that integrate geometry with art, which will enhance the students’ learning. Each lesson can be modified for any grade between kindergarten and 6th grade. These modifications will be explored in this paper along with the lesson idea. Finally, professional artwork of each type will be explored. Each piece investigated has significant mathematical ties and will be examined in the paper

Inclusion in the Classroom: Addressing Antecedents of Challenging Behaviors

The study aimed at identifying the antecedents of challenging behavior of a student who was identified as Developmental Cognitive Disability (DCD) in her inclusive secondary classes. This study was directed towards a student and her behaviors to help determine what, if anything, triggered different behaviors in the inclusive classroom. Information was gathered through paraeducators along with her teachers (e.g. general education teachers, special education teachers) observing the student. The information will be presented to administration to create a staff development on inclusion in the classroom. Analyzing the data, some of the triggers for behaviors were deemed inevitable, and some were eye opening. The results of the study will be used to create professional development opportunities for staff to increase awareness and skills to effectively include students with developmental cognitive disabilities in their classroom

The Physics of Sports: a Textbook

This is the full PDF of The Physics of Sports: a Textbook by Professor David R. Heskett, University of Rhode Island Department of Physics. This version of the book does not include answers. A version with answers, as well as all supplemental videos, are available here: https://digitalcommons.uri.edu/physicsofsports/ This book is intended to accompany a one-semester general education college science course. It is largely conceptual with some simple quantitative and semi-quantitative content. No previous physics background is necessary. Some math is needed - simple algebra and arithmetic. Questions and exercises are embedded throughout the text. Also included are homework questions and exercises for each chapter. The book may also be appropriate for a high school physics course.https://digitalcommons.uri.edu/physicsofsports/1065/thumbnail.jp

Epigenetic Regulation of Nuclear Hormone Receptor DAX-1

DAX-1 (NR0B1) is an orphan nuclear receptor that plays a key role in the development and maintenance of steroidogenic tissue in mammals. Dax-1 is also expressed in mouse embryonic stem (ES) cells and is required to maintain pluripotency. Duplication of the X-chromosome in the region containing the NR0B1 gene results in sex reversal, and mutations in NR0B1 cause adrenal hypoplasia congenita. DAX-1 has been observed to act as a corepressor of other nuclear receptors including androgen receptor (AR), estrogen receptor (ER), and steroidogenic factor 1 (SF-1). In addition to pluripotent ES cells, DAX-1 is primarily expressed in select tissues of the body such as testes, ovaries, adrenal cortex and breast. In some cases, changes in DAX-1 expression may serve as an indicator of aberrant growth. For example, DAX-1 expression is greatly reduced in ER+ breast cancer patient samples and several ER+ cell lines; however the mechanism leading to this change in DAX-1 expression is unknown. Here, we propose that expression of DAX-1 may be governed by epigenetic mechanisms. We sought to determine whether promoter region CpG island methylation and expression of DAX-1 were inversely related , and if the loss of DAX-1 expression in the breast cancer cell line MCF-7 is due to epigenetic mechanisms. Using gene expression assays and bisulfite sequencing, we have confirmed the relationship between methylation status and DAX-1 expression in MCF7 and A549 cancer cell lines. We have further analyzed the DAX-1 CpG island to observe the presence of epigenetic readers MeCP2 and MBD1 that link methylation to gene repression, suggesting DAX-1 is expressed and regulated differentially by epigenetic mechanisms in the cancer cell lines MCF7 and A549

Structure-Property Relationships of Polyisobutylene-Block-Polyamide Thermoplastic Elastomers

Thermoplastic elastomers (TPEs) are a class of polymer fit for a wide variety of applications due to their customizability. In the synthesis of these types of materials, an elastically-performing polymer, deemed the “soft block,” is combined with a stiffer “hard block” polymer, each of which can be selected based on their own specific properties in order to achieve desired material behavior in the final copolymer. Recently, the use of polyisobutylene as a soft block in combination with a polyamide hard block has been investigated for use in TPE synthesis. While the material showed some promising behavior, many properties were still below those of the commercially standard TPE material Pebax. Polyisobutylene and polyamide samples of varying molecular weights and types were synthesized and combined in different ratios to form a variety of polyisobutylene-block-polyamide (PIB-PA) samples. Mechanical stirring as opposed to magnetic mixing and an increase in the soft block component of the copolymer were the most important adjustments made from previous PIB-PA syntheses. The effect of overall block length and the incorporation of a wider variety of polyamide (PA) types were also investigated. Mechanical stirring allowed for the achievement of higher molecular weights, and use of PA-6,6 as a hard block also produced a TPE with a markedly higher melting point than previously witnessed. Increasing the PIB content as well as using longer blocks of both precursors produced tougher copolymers, allowing them to undergo more mechanical deformation before failure as compared to previous PIB-PA formulations

The Physics of Sports: a Textbook (with answers)

This is the full PDF of The Physics of Sports: a Textbook by Professor David R. Heskett, University of Rhode Island Department of Physics. This version of the book includes answers. A version without answers, as well as all supplemental videos, are available here: https://digitalcommons.uri.edu/physicsofsports/ This book is intended to accompany a one-semester general education college science course. It is largely conceptual with some simple quantitative and semi-quantitative content. No previous physics background is necessary. Some math is needed - simple algebra and arithmetic. Questions and exercises are embedded throughout the text. Also included are homework questions and exercises for each chapter. The book may also be appropriate for a high school physics course.https://digitalcommons.uri.edu/physicsofsports/1066/thumbnail.jp

The Role of Electric Field and Ultrasonication in the Deposition and Alignment of Single-Walled Carbon Nanotube Networks Using Dielectrophoresis

The effects of electric field and ultrasonication on the deposition and alignment of single-walled carbon nanotubes (SWCNTs) across a 10 μm electrode gap have been studied. It was found that a frequency of ~1 MHz of the applied field yields the largest current independent of the magnitude of the voltage or the ultrasonication time of the sample. Increasing the ultrasonication time of a SWCNT solution changes the I-V characteristics of the deposited nanotubes from linear to nonlinear for all the voltages and frequencies of the applied field. Even in the absence of an electric field, SWCNTs bridged the electrode gap up to a critical sonication time which depends on the concentration of nanotubes in the solution