Physical Sciences and Mathematics Commons^™

A Web-Based Job Management System For Three-Dimensional Printing And Scanning At The University Of North Dakota, Dalyn Limesand, Stephanie Hollman, Jeremy Straub, Scott Kerlin

Jeremy Straub

Three-dimensional (3D) printers have gained popularity for use for many different projects. The work presented herein aims to make this process simpler. This paper discusses a system that will allow individuals from across campus to submit object files for printing by a 3D printer, without having to schedule appointment and manually operate it.

Logistical requirements dictate some level of human involvement, despite a goal of creating a fully automated system. Involvement areas include converting /preparing submitted files, sending the job to the printer, print tray preparation, and completed object removal. From a user’s perspective, however a seamless experience is anticipated. …

The Creation Of A Communication Systems For A Small Satellite At The University Of North Dakota, Michael Hlas, Jeremy Straub, Ronald Marsh

Jeremy Straub

Software defined radios (SDRs) are poised to significantly enhance the future of small spacecraft communications. They allow signal processing to be performed on a computer by software rather than requiring dedicated hardware. The SDR takes data from the flight computer and converts it into an analog signal that is transmitted via the spacecraft antenna. Because the signal processing is done in software, the radio can be easily reconfigured.

Data is prepared for transmission by TCP stack software onboard the OpenOrbiter Spacecraft and placed in a queue while the spacecraft is listening for a signal from a ground station. When a …

Update On The Development Of A 1-U Cubesat At The University Of North Dakota, Jeremy Straub, Ronald Marsh

Jeremy Straub

An overview of the progress on the development of the OpenOrbiter CubeSat is presented. This covers, at a high level, the work that has been performed during the past year and foundational work that occurred prior to this. This poster also discusses future plans for the Open Prototype for Educational NanoSats (OPEN) framework and the OpenOrbiter Small Spacecraft Development Initiative. Particular focus is given to the ongoing work to prepare for an orbital launch, which the program has been down-selected for through the NASA ELaNa CubeSat Launch Initiative program.

In addition to this discussion of the program’s origins, goals and …

Scheduling Algorithm Development For An Open Source Software Spacecraft, Calvin Bina, Jeremy Straub, Ronald Marsh

Jeremy Straub

The OpenOrbiter project at the University of North Dakota is working to develop a set of designs for a CubeSat class spacecraft as well as a working, modular collection of open source code that can be used by other CubeSat projects as a starting point for development. The availability of these designs and this codebase should foster accelerated development for other CubeSat projects, allowing those projects to focus their effort on their own application area, instead of reinventing the proverbial wheel. One aspect of this is to implement a task scheduler which will run on a Raspberry Pi flight computer …

Wikipedia And Medicine: Quantifying Readership, Editors, And The Significance Of Natural Language, James M. Heilman, Andrew G. West

Andrew G. West

BACKGROUND: Wikipedia is a collaboratively edited encyclopedia. One of the most popular websites on the Internet, it is known to be a frequently used source of healthcare information by both professionals and the lay public.

OBJECTIVE: This document quantifies: (1) The amount of medical content on Wikipedia, (2) the citations supporting Wikipedia’s medical content, (3) the readership of medical content, and (4) the quantity/characteristics of Wikipedia’s medical contributors

METHODS: Using a well-defined categorization infrastructure we identify medically pertinent English Wikipedia articles and links to their foreign language equivalents (Objective 1). With these, Wikipedia’s API can be queried to produce metadata …

Rapid Phase Transformation Under Local Non-Equilibrium Diffusion Conditions, Sergey Sobolev

Sergey Sobolev

Phase transformation with a moving interface occurs under far from local equilibrium conditions when the interface moves with sufficiently high velocity. This deviation cannot be adequately described by the classical irreversible thermodynamics with diffusion equation of parabolic type because it assumes local equilibrium hypothesis. The local non-equilibrium diffusion model has been developed to take into account the deviation from local equilibrium during binary alloy solidification using the hyperbolic diffusion equation. The model introduces a finite propagation velocity of concentration disturbances in the bulk liquid VD as the characteristic diffusion parameter and predicts a sharp transition from diffusion controlled to diffusionless …

An Overview Of The Openorbiter Autonomous Operating Software, Dayln Limesand, Timothy Whitney, Jeremy Straub, Ronald Marsh

Jeremy Straub

The OpenOrbiter spacecraft aims to demonstrate the efficacy of the Open Prototype for Educational Nanosats (OPEN) framework. Software is an important part of this framework. This paper discusses the operating software for the spacecraft (which runs on top of the Linux operating system to command spacecraft operations). It presents an overview of this software and then pays particular attention to the aspects of software design that enable onboard autonomy. It also discusses the messaging scheme that is used onboard and the testing and validation plan. Finally, it discusses system extensibility, before concluding.

Nanosatellite Scheduling Using A Dictionary Module And A ‘Useful Trick’ With Coded Unsigned Integers, Monilito Castro, Jeremy Straub

Jeremy Straub

Schedulers for small spacecraft must satisfy the dual requirement of generating very efficient schedules while concurrently minimizing the resources required to create the schedule. This paper proposes a technique for searching for tasks that can be utilized to fill particular schedule locations. This approach is based on a modular system for storing important variables. This modular system has three important variables: t0, x0 and y0. The variable y is latitude and x is longitude. Time variable t is an integer and each unit represents a time quantum. They are related to each other by three functions Ft, Fx, and Fy. …

Swarm Intelligence, A Blackboard Architecture And Local Decision Making For Spacecraft Command, Jeremy Straub

Jeremy Straub

Control of a multi-spacecraft constellation is a topic of significant inquiry, at present. This paper presents and evaluates a command architecture for a multi-spacecraft mission. It combines swarm techniques with a decentralized / local decision making architecture (which uses a set of shared blackboards for coordination) and demonstrates the efficacy of this approach. Under this approach, the Blackboard software architecture is used to facilitate data sharing between craft as part of a resilient hierarchy and the swarm techniques are used to coordinate activity. The paper begins with an overview of prior work on the precursor command technologies and then presents …

Small Satellite Communications Security And Student Learning In The Development Of Ground Station Software, Scott Kerlin, Jeremy Straub, Jacob Huhn, Alexander Lewis

Jeremy Straub

Communications security is gaining importance as small spacecraft include actuator capabilities (i.e., propulsion), payloads which could be misappropriated (i.e., high resolution cameras), and research missions with high value/cost. However, security is limited by capability, interoperability and regulation. Additionally, as the small satellite community becomes more mainstream and diverse, the lack of cheap, limited-to-no configuration, pluggable security modules for small satellites also presents a limit for user adoption of security.

This paper discusses a prospective approach for incorporating robust security into a student-developed ground station created at the University of North Dakota as part of a Computer Science Department senior design …

Using A Constellation Of Cubesats For In-Space Optical 3d Scanning, Jeremy Straub

Jeremy Straub

The assessment of in-space objects is an area of ongoing research. Characterization of resident space objects (RSOs) can be useful for assessing the operating status of operator-affiliated or non-affiliated space assets, identifying unknown objects or gathering additional details for known objects. Under the proposed approach, a ring-like constellation of CubeSats passes around the target (at a distance) collecting imagery. This imagery is then utilized to create a 3D model of the target. This paper considers several key elements of a constellation to perform this type of imaging, including the constellation design and imaging capabilities required and the astrodynamics relevant to …

Effect Of Eva Content Upon The Dielectric Properties In Ldpe-Eva Films, Innovative Research Publications Irp India, Hojjat, Amrollahi, Mahmood, Borhani

Innovative Research Publications IRP India

Low density polyethylene (LDPE) blends with different percentages of ethylene vinyl acetate polymer membranes were prepared by a hot press casting method. The effects of EVA content on the electrical properties of LDPE were studied. The results on the electrical properties revealed that the surface resistance, volume resistivity, and breakdown voltage of the LDPE decrease with EVA content and reach a minimum at a 30 wt% of EVA. Dielectric constant and dielectric loss factor were increased with increasing EVA content up to 30 wt% of EVA. It can be deduced that the electrical properties of LDPE are improved by blending …

Sufficient Condition For Complete Graphs And Hamiltonian Graphs, Innovative Research Publications Irp India, S.Venu Madava Sarma, T.V. Pradeep Kumar

Innovative Research Publications IRP India

In 1856, Hamiltonian introduced the Hamiltonian Graph where a Graph which is covered all the vertices without repetition and end with starting vertex. In this paper I would like to prove that every Complete Graph ‘G’ having n ≥ 5 vertices, such that n is odd. If for all pairs of nonadjacent vertices u, v one has du + dv ≥ n − 2, then G has a Hamiltonian path.

Belpatra (Aegel Marmelos) Bark Powder As An Adsorbent For The Color Removal Of Textile Dye “Torque Blue”, Innovative Research Publications Irp India, Vandana Gupta, Anupam Agarwal, M. K. Singh

Innovative Research Publications IRP India

Adsorption is used as a potential method for the removal of color (dye) from industrial waste water. In this paper an easily available low cost Belpatra (Aegel marmelos) bark powder was used as an adsorbent for the removal of textile dye Torque Blue. For the present work several experiments were conducted at different adsorbent dosage, pH, temperature, dye concentration, particle size, and contact time in a batch adsorption mode. The experimental results revealed that maximum adsorption capacity of Belpatra bark powder on Torque blue dye was found to be 98% at an adsorbent dosage of 0.7gm in 100 ml dye …

Negative Binomial Regerssion, 2nd Ed, 2nd Print, Errata And Comments, Joseph Hilbe

Joseph M Hilbe

Errata and Comments for 2nd printing of NBR2, 2nd edition. Previous errata from first printing all corrected. Some added and new text as well.

Some Covariance Inequalities For Non-Monotonic Functions With Applications To Mean-Variance Indiference Curves And Bank Hedging, Martin Egozcue

Martin Egozcue

No abstract provided.

Cloud Computing Technology For Education Applications, Zhi-Xue Xu

Zhi-Xue Xu

Cloud Computing Technology and Big Data Applications have been connected strongly to our daily work and life. Some peoples think that Cloud Computing is fourth revolution in Information Technology. Cloud Computing Applications that like Utility Computing also have been applied, used and developed for education and Smart Virtual Cloud Campus creations. Cloud computing technology is changing IT application development method and format on campus, and challenge and reform to the current IT computer infrastructures and applications. The cloud computing technology for application development in education can build robust applications in a short time and lower cost. The Cloud Computing Technology …

A Fishery, A Sanctuary, A Sink, And A Disaster: The Often Hapless Management Of California's Salton Sea, William M. Mclaren

Will McLaren

Over a century ago, a series of questionable management decisions and water-diversion engineering mistakes in Southern California produced an “unnatural” waterbody called the Salton Sea. Since then, the Sea has served as a recreational destination with fluctuating popularity, a sanctuary for migratory birds, a sink for agricultural runoff and urban wastewater, and one of the most productive tilapia and corvina fisheries in the United States. However, the Sea’s resources and associated uses have steadily deteriorated since its formation.

The contrast between the ethics that drove resource management decisions at the time of the Salton Sea’s formation to those employed in …

Stress Analysis On Behaviour Of Rails, Innovative Research Publications Irp India, M.Kameswara Reddy, Dr.K.V.S. Srinadh,, T.V.Ravi Teja, Rafiuzzama Shaik

Innovative Research Publications IRP India

It is axiomatic to say that the rails used nowadays have been subjected to heavier axle loads and high operating speeds. This may lead to derailment and eventually loss of life. In this paper Transient analysis (Dynamic analysis) for rail by using ANSYS 12.1 Software is discussed. In this analysis deflection and stress are compared with wheel diameter, load, speed and range of distribution of contact load. Result is analyzed by the effect of variation of these parameters.

Neutron Generation From 10mev Electron Beam To Produce Mo99, Innovative Research Publications Irp India, Borhani Zarandi, Mahmood, Tabbakh, Farshid, Amrollahi Bioki, Hojjat

Innovative Research Publications IRP India

In this paper MCNP4C code has been used to simulate of the photonuclear interaction induced by 10MeV electron beam is an approach for generating the high intensity neutrons. Since the results are depended on the target material, the calculations are performed for the targets made of high z elements of Pb, Ta and W in a simple geometry.

Wykorzystanie Granulometrii Obrazowej W Klasyfikacji Treści Zdjęć Satelitarnych, Przemysław Kupidura

Przemysław Kupidura

This book presents a new method of classifi cation of satellite images, based on utilisation of granulometric analysis of image texture. The theoretical background of the method and its accuracy, depending on different parameters of granulometric processing and input images, is presented. It is compared to other approaches of satellite image classification. The essence of the method relies on the use of granulometric maps, i.e. images containing information about a local texture in every pixel, additionally to spectral data contained in original multispectral images. One of the main advantages of the proposed method is its multiscality, i.e. a possibility to …

The Spatial Distribution Of Electric Field Intensity When The Motion Of Electric Charge In Absolute Space, Vildyan Yanbikov

Vildyan Yanbikov

При движении электрического или гравитационного заряда в абсолютном пространстве. Поля, создаваемого этими частицами, будет иметь другое распределение в пространстве. В сравнении со стационарным бесплатно. При движении заряда поля деформаций.

The Formation Of The Trajectories Of The Planets Of The Solar System, Vildyan Yanbikov

Vildyan Yanbikov

Процесс превращения круговой орбите планеты по эллиптической. Процесс превращения эллиптической орбите вокруг Солнца (прецессия перигелия планеты).

The Critical Parameters Of A Slowly Rotating Neutron Star, Vildyan Yanbikov

Vildyan Yanbikov

A model of unstable conditions of a slowly rotating neutron star. The formulas for calculating the mass and diameter of a neutron star. As well as the pressure and temperature in the center of the star. At the time of its unstable condition before it exploded.

New Interpretation Of Experimental Data On Si−As Alloy Solidification With Planar Interface, Sergey Sobolev

Sergey Sobolev

No abstract provided.

Fermat's Last Theorem Disproved Over 7 Times By James T. Struck 2014 And 2015 3 Disproofs 2014 And 4 Disproofs 2015, James T. Struck

James T Struck

Fermat's Last Theorem Disproved Over 7 Times By James T. STruck 2014 and 2015 3 Disproofs 2014 and 4 Disproofs 2015. 3 Disproofs from 2014 in other article. Petition for Gottingen and French Academy of Sciences Awards for Prize. Use of 2 N's not prohibited by Fermat so easy disproof using n=3 and n=4 2 third plus 2 third does equal 2 fourth. Disproof by non Exclusion by Fermat of 2 n's and other disproofs like 0's and infinity and 0's and 1's as integers.

Proof And Disproof At The Same Time-Beal Conjecture Case Study Proof 2015, Disproven 2015 And 2013 Beal Conjecture Disproven, James T. Struck

James T Struck

Beal Conjecture Case Study Proof 2015 and 2013 Beal Conjecture Disproven-Planet Number Different Based on Larger than Pluto Standard, Beal Disproven Based on Examples and 2015 Proof Based on Examples, 2015 Disproof Based on Disproof of If Statements Added

Disproving Conventional 9 Planet Concepts Our Solar System would have 15 planets using the Pluto Standard of Pluto's 2200 km diameter. Jupiter, Io, Europa, Callisto, Ganymede would be a Quintuple Planet or 5 planets, Saturn and Titan a Double Planet or 2 planets, Neptune and Triton also a Double Planet or 2 planets. By the way using Charon's 1200 km diameter …

Void Cosmology-Better Explains What Happens First, Background Radiation, Voids In Space, Hydrogen Concentrations, James T. Struck

James T Struck

1

Void Cosmology better explains What Happened First, Cosmic

Microwave Background at around 4. 73 K, 150 Million Light

Year Diameter Largest Voids, Red shift at Distance through

Void Drifting/Void Expansion, Void Inflation, Gravitational

mass and Void Movement, and Helium at 25 % Versus

Hydrogen at 75 % Due to Particle Combination and less Higher

Element Concentrations

Abbe George Lemaitre 1894-1966 was a Belgian cosmologist,

mathematician, priest, physicist who postulated an explosive

beginning. In the 1940’s, George Gamow, Hans Bethe and

Ralph Alpher went from Lemaitre’s starting nuclear fission

ideas to ideas of nuclear fusion being responsible for the

Universe’s …

Reviving Brontosaurus Name Because Of Species Differences, Life Throoughout The Precambrian As New Life Theory, Disproof Of Poincare Conjecture Because Meteorites Do Not Need To Map To Asteroid 3 Spheres Can Be From Comets, Planets, Oort Cloud, Kuiper Belt, Manifolds Changing And Moving Do Not Map To Unchanging 3 Spheres And I As Manifold Do Not Want To Be Folded Into 3 Sphere So Poincare Conjecture Disproven, James T. Struck

James T Struck

Three discoveries I made from visiting the Field Museum of Natural History yesterday on Illinois Day 12/6/2015. Brontosaurus as a dinosaur name can be brought back as existing in Wyoming rather than Apatosaurus' Colorado, 5 vertebrae rather than 3 on Apatosaurus, and larger size are enough to argue for a unique species. Yale Professor Marsh had it right when he saw Brontosaurus as different than Apatosaurus; larger size, different location, different bones should revive the Brontosaurus name. Riggs spoke to soon when speaking against Brontosaurus as a separate name. Second discovery, a new theory of life on Earth origin that …

Gwlw Suppliers, Videos And More, David A. Bainbridge

David A Bainbridge

Super efficient irrigation systems can be made with simple materials. These can cut water use and weeding 50-90% and improve plant health, speed maturity and increase yield.