2,271 research outputs found
The future of publishing scientific data: is it time to accept the wider publication of null data?
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.One of the most self-limiting dogmas’ which scientists submit themselves to is the avoidance of publishing negative data. This reflected the fact that authors generally do not write up and submit null data. The avoidance of publishing negative data (by authors and journals) ensures we only show experiments that worked and represent a clear story of success. Experiments which the research community remains ignorant of and which thus be repeated wasting the limited money currently available for research from the government and charities, and time which could be spent more productively, moving the field forward more rapidly. But how should the science community publish negative data? This Editorial discusses some of the concerns regarding publishing null data and ways we can move the bioscience forward through it's publication
Development and flight evaluation of an augmented stability active controls concept: Executive summary
A pitch active control system (PACS) was developed and flight tested on a wide body jet transport (L-1011) with a flying horizontal stabilizer. Two dual channel digital computers and the associated software provide command signals to a dual channel series servo which controls the stabilizer power actuators. Input sensor signals to the computer are pitch rate, column trim position, and dynamic pressure. Control laws are given for the PACS and the system architecture is defined. Discussions are given regarding piloted flight simulation and vehicle system simulation and vehicle system simulation tests that are performed to verify control laws and system operation prior to installation on the aircraft. Modifications to the basic aircraft included installation of the PACS, addition of a c.g. management system to provide a c.g. range from 25 to 39% mac, and downrigging of the geared elevator to provide the required nose down control authority for aft c.g. flight test conditions. Three pilots used the Cooper-Harper Rating Scale to judge flying qualities of the aircraft with PACS on and off. The handling qualities with the c.g. at 39% mac (41% stability margin) and PACS operating were judged to be as good as the handling qualities with the c.g. at 25% mac (+15% stability margin) and PACS off
CRIMINAL PROCEDURE, COURTS Crime Victims\u27 Bill of Rights: Provide for Crime Victims\u27 Rights; Increase Maximum Amount of Compensation Payable to Victims of Crimes; District Attorneys: Provide for Additional Duties of District Attorneys with Respect to Crime Victims\u27 Rights
Act 289, originating as HB 170, provides for a victims’ “Bill of Rights.” Crime victims must be notified of specific events in the judicial process, including the capture, charging, or conviction of a suspect or when a convict is under parole consideration. Act 289 also increases the compensation available to crime victims to a maximum aggregate amount of $10,000. Act 290, originating as HB 178, authorizes the appointment of additional assistant district attorneys and expands their duties. Under Act 290, district attorneys and assistant district attorneys will be responsible for assisting crime victims through the criminal justice process
Professional Practices
When people look at the work that I’ve done at Murray State so far, I want them to notice my passion for the field. In the works that I have done so far, a few of my favorite things to instill are alignment, typography and color. In graphic design, these elements are important attributes to create a successful piece.
I typically try to imitate what attracts me to another person’s work. My art and design use a lot of contour lines, symmetrical balance, shape, and negative and positive space. Usually my mental process of starts with getting ideas in my head and I write them down. If I don’t get an idea right away it usually takes some time for me to finally come up with a project to do. If I do have an idea though, it usually starts as one thing and as I start to work on it, it begins morphing into many different ideas and my entire project becomes a much bigger concept. I have instilled some of these elements and principles of design, specifically into a logo project and travel ad layout project.
The things that influence my work vary from my family to music to desserts to traveling. They are the things that excite me the most and I always have endless ideas of items to make when it comes to them. I also love making logos and the concept of brand naming. I am very interested in working on my hand lettering. This is a very big reason why I love Louise Fili and Marla Moore’s work so much. Fili does both branding and hand lettering and I recently have started to look at her work more often. Moore does everything that I aspire to do as well. Her aesthetic and her hand lettering inspire me to really give it my all. Overall, what I think I do the best in are the projects that interest me and go along with what I want to be successful at in life.https://digitalcommons.murraystate.edu/art399/1051/thumbnail.jp
Tissue classification based on relaxation environments
Since the advent of magnetic resonance (MR) imaging as a sound medical imaging technique there has been a need to classify the tissues in the images created. Typically the radiologist has been responsible for the evaluation of the images produced by the MRI machine. In any given MRI there exists many different types of tissues each with a certain concentration of spin densities. Each one of these tissues has a unique T1 and T2 decay times along with a with a unique spin density. The T2 values are indicative of the structure of the tissue, and if the T2 time of a particular tissue has been previously determined the type of tissue can be determined. This is useful for automatic identification of disease, tumors, or any tissue for that matter. This information is characteristic for a particular tissue across MRI platforms. When the imaging sequence is specified that keeps the time of repetition (TR) constant, the image is a T2 weighted image. The method used in this paper, the Direct Exponential Curve Resolution algorithm (DECRA), attempts to evaluate these unique T2 times and classify the images. Antalek and Windig (4) have shown that by using DECRA it is possible to classify images based on T2. The goal of this experiment is to determine the weaknesses and limitations of DECRA when applied to synthetically generated images and real images obtained from a MRI machine. This method was analyzed to see if there was a possibility of improvement for future application and improvement. To test DECRA it was applied to synthetic images and real images obtained from an imager. The synthetic images where given noise to try to simulate a real image and to see how high the signal to noise ratio had to be. DECRA was able to segment the noiseless synthetic images, but began to fail as the numbers of pixels were reduced. When it was applied to real image DECRA performed well only after manual separations of the test images. DECRA has shown that it can a viable method to segment data that is related by relaxation constants
“The Ignorant Vote—Honors Are Easy”
In the New York magazine Harper’s Weekly on December 1, 1876, “The Ignorant Vote – Honors Are Easy” cartoon is showing the difference that the African American Republican vote and Irish Catholic Democratic vote played in the 1876 election between Rutherford B. Hayes, a republican, and Samuel J. Tilden, a democrat. There was a dispute on who the actual election winner was because the votes were so close
The Effects of Temperature on Indicator Species Tests for Water Quality
This study sought to investigate the different response of two indicator species tests: Hach® PathoScreen™ Field Test and IDEXX Colilert® using the Quanti-Tray/2000® enumeration method. Both tests were carried out according to the instructions enclosed in the packages using diluted water samples taken from the secondary clarifier at the West Side Waste Water Treatment Plant in Fayetteville, AR. The tests were carried out at various temperatures in an attempt to reflect conditions that could be encountered in the field, where electricity, equipment, and expertise may not be available. The PathoScreen™ test responded adequately at a relatively wide range of temperatures, from approximately 22°C to 35°C, whereas the Quanti-Tray/2000® method was much more sensitive, producing erratic responses. In addition to PathoScreen™ yielding more consistent responses, the field kit and materials necessary for that test are much cheaper than those for using the Quanti- Tray/2000® method. These results suggest that the Hach® PathoScreen™ test, a hydrogen sulfide (H2S) presence-absence (PA) test, is more reliable for use in the field
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