Physical Sciences and Mathematics Commons^™

Analytical Approach To Investigation Of Free Vibration Of Thin Rectangular Plate Immersed In Fluid, Resting On Winkler And Pasternak Foundations, Obanishola Sadiq, Gbeminiyi Sobamowo, Saheed Salawu

Karbala International Journal of Modern Science

Dynamic behaviour of free vibration of rectangular plate is investigated. This study considered an analytical approach to investigation of free vibration of thin rectangular plate immersed in fluid, resting on Winkler and Pasternak foundations.The governing nonlinear partial differential equation is analyzed using two-dimensional differential transform method. The accuracy of the analytical solutions obtained is verified with existing results in literature and confirmed in excellent agreement. Thereafter, the analytical solutions are used for investigation of effect of elastic foundation, fluid and aspect ratio on vibrating plate.From the result, it is observed that, increase elastic foundation parameters increases natural frequency, increase aspect …

Editorial Board

Karbala International Journal of Modern Science

No abstract provided.

Eavesdropping Hackers: Detecting Software Vulnerability Communication On Social Media Using Text Mining, Susan Mckeever, Brian Keegan, Andrei Quieroz

Conference papers

Abstract—Cyber security is striving to find new forms of protection against hacker attacks. An emerging approach nowadays is the investigation of security-related messages exchanged on Deep/Dark Web and even Surface Web channels. This approach can be supported by the use of supervised machine learning models and text mining techniques. In our work, we compare a variety of machine learning algorithms, text representations and dimension reduction approaches for the detection accuracies of software-vulnerability-related communications. Given the imbalanced nature of the three public datasets used, we investigate appropriate sampling approaches to boost detection accuracies of our models. In addition, we examine how …

Creation Of Integrated System For Registration Radio Emissions From High-Energy Extensive Air Showers At An Altitude 3340 Meters Above Sea Level, M. Nassurlla, T. Kh. Sadykov, B. A. Iskakov, Y. M. Tautayev, K. Tastanova, M. B. Khabargeldina, A. I. Zhumabayev, A. D. Beisenova, A. Haungs, O. A. Novolodskaya, T. Idrisova, N. M. Salikhov

Eurasian Journal of Physics and Functional Materials

At the High mountain station of cosmic rays at an altitude of 3340 meters above sea level in 2018, work on modernization of registration of radio emission from extensive air showers was carried out. To date, 4 radio antennas have been installed in the direction of north, south, west, east at a distance of 30 meters from the registration center. Registration is carried out in the frequency range 30 - 80 MHz. As a result of the preliminary experiment, some event candidates were selected that demonstrate the presence of a noticeable radio signal pulse in the vicinity of the nearest …

Safety Analysis For The Wwr-K Research Reactor Converted To Leu Fuel, S. N. Koltochnik, A. A. Shaimerdenov

Eurasian Journal of Physics and Functional Materials

Recently in the WWR-K water-water research reactor the former HEU fuel, enriched to 36% in Uranium- 235, was changed to LEU one, enriched to 19.7%, with substantial change of the core configuration. In view of reactor conversion, a new Safety Analysis Report (SAR) was developed for the WWR-K reactor. Substantiation of reactor safe operation under both normal operation and emergency conditions was done under thermal-hydraulic approach. In the analysis developed prior to physical start up it was assumed that a main circulation pump (MCP) provides the coolant flow rate in the core equal to 350 m 3 /h (a certified …

Neutron-Physical Parameters At The Outlet Of The Wwr-K Reactor Beam Tube, A. B. Bauyrzhan, S. N. Koltochnik, M. T. Aitkulov, D. S. Dyussambayev, A. A. Shaimerdenov, B. Mukhametuly, N. T. Burtebaev

Eurasian Journal of Physics and Functional Materials

The paper is devoted to the neutron-physical parameters obtained via combined calculations and experimental measurements for the exit of the WWR-K reactor beam tube. The experimentally measured values of the thermal and fast neutron flux densities at the exit comprise 9.6 × 10⁸ and 8.4 × 10⁷ cm^-2 s^-1 , respectively. The dose rate of gamma-emission is 30 Sv/h. The obtained parameters will be used in designing of the collimation and screening systems of the installation for radiography and tomography to be created at the beam tube #1.

Investigation Of Radio-Emission From Extensive Air Shower At High Mountain Cosmic Ray Station At An Altitude Of 3340 M Above Sea Level, M. Nassurlla, T. Kh. Sadykov, B. A. Iskakov, Y. M. Tautayev, K. Tastanova, M. B. Khabargeldina, A. I. Zhumabayev, A. D. Beisenova, A. Haungs, O. A. Novolodskaya, T. Idrisova, N. M. Salikhov

Eurasian Journal of Physics and Functional Materials

The complex EAS installation of the Tien Shan mountain cosmic ray station which is situated at a height of 3340 m above sea level includes the scintillation and Cherenkov detectors of charged shower particles, an ionization calorimeter and a set of neutron detectors for registering the hadronic component of the shower, and a number of underground detectors of the penetrative EAS component. Now it is intended to expand this installation with a promising method for detecting the radio-emission generated by the particles of the developing shower. The facility for radio-emission detection consists of a three crossed dipole antennae, one being …

Energy Transfer And Defect Formation Processes In Nano Silicon Under The Influence Of Epithermal Neutrons, A. Garibli

Eurasian Journal of Physics and Functional Materials

The neutrons scattering and capture cross-section processes has been calculated for natural²⁸Si ,²⁹Si ,³⁰Si isotopes which are main part of nanosilicon samples when irradiated for 20 hours by epithermal neutron flux. The values of energies has been determined which given to nanosilicon nuclei as a result of scattering processes in the energy intervals of investigated neutrons. The cross-sections of radiation capture process and the amount of³¹Si radioactive isotope which can be formed by by³⁰Si isotope in the energy interval of epithermal neutrons, the parameters of energy supply and ionization processes …

Change Of Electrophysical Properties Of The Si(111) And Si(100) Surface In The Process Of Ion Implantation And Next Annealing, A. S. Rysbaev, I. R. Bekpulatov, B. D. Igamov, Sh. X. Juraev

Eurasian Journal of Physics and Functional Materials

The change in the electrical properties of the Si(111) and Si(100) surfaces during ion implantation and subsequent annealing was studied. The possibilities of controlling of the electrophysical properties of the Si(111) and Si(100) surface layers by the implantation of ions of alkaline and alkaline-earth elements are analyzed. Some electrophysical properties of semiconductors containing p- and n-structures and the possibilities of their application in electronics are discussed.

The Effect Of High-Temperature Annealing On The Phase Transformations Of The Perovskite Ytio3-X System, D. A. Mustakhieva, I. Z. Zhumataeva, A. L. Kozlovsky, K. K. Kadyrzhanov

Eurasian Journal of Physics and Functional Materials

This paper presents the results of a study of the structural characteristics of perovskite systems based on YTiO_x. These samples were subjected to heat treatment in the process of solid-phase synthesis. The change in physicochemical properties was investigated by scanning electron microscopy, X-ray structural and energy dispersive analysis. In the course of the work, it was found that the synthesized samples are a mixture of three phases characteristic of yttrium compounds with titanium. A quantitative change in the phases during the heat treatment indicates phase transformations and a change in the basic crystallographic characteristics. The results of these …

Dynamical Approach For Synthesis Of Superheavy Elements: Fusion Mechanism And Nuclear Structure, Y. Aritomo, N. Liyana, B. Yanagi, H. Hachikubo

Eurasian Journal of Physics and Functional Materials

To synthesis of superheavy elements, the shell structure is very important not only in the stability of nuclei, but also the fusion process, especially the cold fusion reaction. We employ the Langevin equation with the microscopic transport coefficients and calculate the fusion cross section for the reaction⁷⁰Zn+²⁰⁸Pb→²⁷⁸Cn. In the dynamical process, the effect of nuclear structure is discussed.

The Gibb’S Free Energy And Magnetic Susceptibility Of Samarium Chalcogenides (Smx, X=S, Se And Te), D. Raj Adhikari, S. Khatri, D. Kumar Chaudhary, H. Prasad Lamichhane

Eurasian Journal of Physics and Functional Materials

In the present paper, the magnetic susceptibility have been studied under the effect of pressure at constant temperature in samarium chalcogenides (SmX, X=S, Se and Te). The samarium chalcogenides have predicted the pressure induced structural and electronic transition from NaCl structure (FCC lattice) to CsCl structure (BCC lattice). The f energy level of electrons in the compounds (SmX, X=S, Se and Te) have been shifted towards 5d conduction band due to the influence of pressure at constant temperature. The variation of the magnetic susceptibility under the effect of pressure at constant temperature have been calculated. The calculated values and …

Using Water Quality Index To Assess Groundwater Suitability At Gazipur District, Bangladesh, Muhammad Qumrul Hassan, Jowaher Raza, Mir F. Karim, Nazrul I. Khandaker

Publications and Research

This study targeted to the suitability of groundwater for drinking purpose at Gazipur District undergoing rapid urbanization and increasing industrialization. The District has an area of 1741.53 km², located in between 23°53' and 24°21' north latitudes and in between 90°09' and 92°39' east longitudes. From six Upazilas in Gazipur District, a total of 130 groundwater samples were collected, which are, Gazipur Sadar Upazila, Sreepur Upazila, Kaliakoir Upazila, Kapasia Upazila, and Kaligonj Upazila. A recent field observation review of industrial sludge found that heavy metal concentration was above the acceptable limit for agricultural soil. Gazipur being adjacent to Dhaka …

Positive Outcomes Of Involving Undergraduate And High School Students In Broader Aspect Of Earth System Science Through Peer Mentoring And Research Activities, Nazrul I. Khandaker, Shuayb Siddique, Matthew Khargie, Juanpablo Rodriguez, Adacia Teemal, Krishna Mahabir, Michael Robinson, Ality Aghedo, Zachary A. Sanichar, Sol De Leon, Tamzid Mubin, Elton Selby

Publications and Research

The importance of involving undergraduates and high school students in field-and-laboratory research investigations at an early stage through peer mentoring has been clearly demonstrated as a critical tool for essential training to fully comprehend academic content and a deeper understanding of the various STEM, geoscience-and- environmental science related topics. As far as we are concerned, student presenters/participants (over 1000) in our topical sessions since 2004 have always found face-to-face presentation through poster sessions to be an ideal scientific venue where exchange of knowledge and discussion are fruitful, constructive and encouraging. It is quite revealing to note that among the student …

Paleoenvironment Of The Devonian Fossiliferous Glenerie Limestone, Rosendale, Upstate New York, Gugu Ginindza, B'Jorn K. Forde, Sebastian R. Agustin, Nazrul I. Khandaker, Malek Shami, Stanley Schleifer

Publications and Research

The Devonian Glenerie limestone outcrops throughout the Hudson Valley and is believed to correlate with the glauconite-rich Oriskany sandstone elsewhere in upstate New York. Field inspection of well-preserved outcrops in Rosendale, upstate New York, indicated the Glenerie formation to be composed of both thin and thickly-bedded chert, interbedded shale, and both calcareous to arenaceous limestone. The Glenerie formation is dominated by spirifer arenosis fossil, which is the index fossil for this formation. The goal of this research is to determine the conditions of the paleoenvironment prevalent to the deposition of the Glenerie formation. Within the arenaceous layers are the spirifer …

Sphinx-Sex-Positon.Jpg, Dorian Good

dorian good

Using A Local Positioning System To Track 2d Motion, Paul R. Destefano, Cora Siebert, Ralf Widenhorn

Physics Faculty Publications and Presentations

Tracking the motion of an object in 2D as a demonstration in a physics classroom or as a laboratory activity is difficult to accomplish in real time with traditional equipment used by educators. A local positioning system (LPS), like the Pozyx Creator series LPS,1 has a potentially wide range of educational applications for introductory physics courses. In a previous article2 we reported using this product to track one-dimensional motion, pressure, rotation, and magnetic field data, but here we discuss how such systems can provide location information (to within approximately ±10 cm) in one, two, and potentially three dimensions both indoors …

Literature Review: Biocement For Stabilization Of Expansive Soils In Las Vegas, Nevada, Silva Topchyan, Moses Karakouzian

LSAMP Poster Presentations

The aim of this study was to present a possibility for the use of biocementon expansive clay. Expansive soil is a type of clay when exposed to water and moisture changes its volume. Due to the clays swelling and shrinkage behavior itsdifficult to use it in engineering and construction projects, therefore costly and unhealthy techniques have been used to stabiliseexpansive soil in order to address the problem [12]. A possible healthy and environmentally friendly solution is Biocement which uses microbial induced calcite precipitation (MICP) in order to help aggregate soil to form a stable cementitiousmaterial. MICP isdependent on the innate …

Evolutionary History And Phylodynamics Of Influenza A And B Neuraminidase (Na) Genes Inferred From Large-Scale Sequence Analyses, Haizhen Zhong

Haizhen Zhong

Background: Influenza neuraminidase (NA) is an important surface glycoprotein and plays a vital role in viral replication and drug development. The NA is found in influenza A and B viruses, with nine subtypes classified in influenza A. The complete knowledge of influenza NA evolutionary history and phylodynamics, although critical for the prevention and control of influenza epidemics and pandemics, remains lacking.

Methodology/Principal findings: Evolutionary and phylogenetic analyses of influenza NA sequences using Maximum Likelihood and Bayesian MCMC methods demonstrated that the divergence of influenza viruses into types A and B occurred earlier than the divergence of influenza A …

Conformational Studies Of Glucose Transporter 1 (Glut1) As An Anticancer Drug Target, Suliman Almahmoud, Xiaofang Wang, Jonathan L. Vennerstrom, Haizhen A. Zhong

Haizhen Zhong

Glucose transporter 1 (GLUT1) is a facilitative glucose transporter overexpressed in various types of tumors; thus, it has been considered as an important target for cancer therapy. GLUT1 works through conformational switching from an outward-open (OOP) to an inward-open (IOP) conformation passing through an occluded conformation. It is critical to determine which conformation is preferred by bound ligands because the success of structure-based drug design depends on the appropriate starting conformation of the target protein. To find out the most favorable GLUT 1 conformation for ligand binding, we ran systemic molecular docking studies for different conformations of GLUT1 using known …

Design, Synthesis And Biological Evaluation Of Novel Hedgehog Inhibitors For Treating Pancreatic Cancer, Vinod Kumar, Amit Kumar Chaudhary, Yuxiang Dong, Haizhen Zhong, Goutam Mondal, Feng Lin, Virender Kumar, Ram I. Mahato

Haizhen Zhong

Hedgehog (Hh) pathway is involved in epithelial-mesenchymal transition (EMT) and cancer stem cell (CSC) maintenance resulting in tumor progression. GDC-0449, an inhibitor of Hh pathway component smoothened (Smo) has shown promise in the treatment of various cancers including pancreatic cancer. However, the emergence of resistance during GDC-0449 treatment with numerous side effects limits its use. Therefore, here we report the design, synthesis and evaluation of novel GDC-0449 analogs using N-[3-(2-pyridinyl) phenyl] benzamide scaffold. Cell-based screening followed by molecular simulation revealed 2-chloro-N1-[4-chloro-3-(2-pyridinyl)phenyl]-N4,N4-bis(2-pyridinylmethyl)-1,4- benzenedicarboxamide (MDB5) as most potent analog, binding with an extra interactions in seventransmembrane (7-TM) domain of Smo due to …

Animal Research, Accountability, Openness And Public Engagement: Report From An International Expert Forum, Elisabeth H. Ormandy, Daniel M. Weary, Katarina Cvek, Mark Fisher, Kathrin Herrmann, Pru Hobson-West, Michael Mcdonald, William Milsom, Margaret Rose, Andrew Rowan, Joanne Zurlo, Marina A.G. Von Keyserlingk

Andrew N. Rowan, DPhil

In November 2013, a group of international experts in animal research policy (n = 11) gathered in Vancouver, Canada, to discuss openness and accountability in animal research. The primary objective was to bring together participants from various jurisdictions (United States, Sweden, Australia, New Zealand, Germany, Canada and the United Kingdom) to share practices regarding the governance of animals used in research, testing and education, with emphasis on the governance process followed, the methods of community engagement, and the balance of openness versus confidentiality. During the forum, participants came to a broad consensus on the need for: (a) evidence-based metrics to …

Sm-Nd, Lu-Hf, And Mn-Cr Isotope Geochemistry Of Achondrite Meteorites: Implications For The Formation Reservoirs Of Differentiated Planetesimals, Zhiguo Guo

Electronic Thesis and Dissertation Repository

Accretion and differentiation of planetesimals are critical steps of planetary formation. By studying achondrite meteorites, we can bring further geochemical and chronological constraints on the source and composition of materials and their evolution throughout the protoplanetary disk. Major and trace element analyses for mineral and whole-rock compositions and high-precision isotopic compositions for the short- and long-lived radiochronometers ⁵³Mn-⁵³Cr, ^147,146Sm-^143,142Nd and ¹⁷⁶Lu-¹⁷⁶Hf are reported for two eucrites, two diogenites, and three ungrouped achondrites. Of these, NWA 12338 is a newly classified ungrouped achondrite with an anomalously higher Δ¹⁷O than mean …

A Gis-Based Study Of Wild Atlantic Way In The West Of Ireland: Its Associated Organisations And Environmental Impacts., Leanne Leonard

SURE Journal: Science Undergraduate Research Experience Journal

Background

Coastal regions are heavily reliant on tourism in order to achieve socio-economic sustainability. However, tourism impacts both positively and negatively on many coastal destinations. The world’s longest defined coastal route of 2600km, the Wild Atlantic Way (WAW), attracts tourists to the region of the West of Ireland after Fáilte Ireland began a promotional tourism drive in 2014. The association between WAW tourism and environmental impacts requires investigation.

The West of Ireland is home to a range of areas protected by the Birds and Habitats Directives which aim to safeguard against potentially damaging developments, meaning the anthropogenic effects from tourists …

What A Career In Teaching Could Look Like For Me: My Journey Of Self-Reflection And Self-Discovery, Jashaun D. Bottoms

STEM Instructional Graduate Teaching Assistant Posters

I started the STEM Instructional Program the summer before my first teaching experience as a graduate student at WMU, and I saw it as a great training opportunity for the upcoming school year. As a General Chemistry II lab instructor, I would encounter students from various majors and backgrounds, with different learning styles and attitudes toward chemistry and math.

In order to effectively engage these students in a pre-lab lecture and to prepare them to complete the experiments, I needed to learn how to keep their attention, clearly explain and relay information in an interesting way, check their understanding, and …

The Firece Green Fire: Vol. 10 Issue 3, Wofford College Environmental Studies Program

The Fierce Green Fire

No abstract provided.

Reorganization Of Surviving Mammal Communities After The End-Pleistocene Megafaunal Extinction, Anikó B. Tóth, S. Kathleen Lyons, W. Andrew Barr, Anna K. Behrensmeyer, Jessica L. Blois, René Bobe, Matt Davis, Andrew Du, Jussi T. Eronen, J. Tyler Faith, Danielle Fraser, Nicholas J. Gotelli, Gary R. Graves, Advait M. Jukar, Joshua H. Miller, Silvia Pineda-Munoz, Laura C. Soul, Amelia Villaseñor, John Alroy

School of Biological Sciences: Faculty Publications

Large mammals are at high risk of extinction globally. To understand the consequences of their demise for community assembly, we tracked community structure through the end- Pleistocene megafaunal extinction in North America.We decomposed the effects of biotic and abiotic factors by analyzing co-occurrence within the mutual ranges of species pairs. Although shifting climate drove an increase in niche overlap, co-occurrence decreased, signaling shifts in biotic interactions. Furthermore, the effect of abiotic factors on cooccurrence remained constant over time while the effect of biotic factors decreased. Biotic factors apparently played a key role in continental-scale community assembly before the extinctions. Specifically, …

Earth: "Un-Human Me", Hakim Mohandas Amani Williams

Peace and Justice Studies Faculty Publications

He took a rib from your side and made others.

So you considered Others your children, forever.

He told you to go forth and produce and multiply so you made capitalism.

He told you to go forth and conquer and pillage and mark your name and plant your flag where-ever you wanted.

So now the moon is yours. Jupiter, beware! [excerpt]

Definition Of The Chalcogen Bond (Iupac Recommendations 2019), Christer B. Aakeroy, David L. Bryce, Gautam R. Desiraju, Antonio Frontera, Anthony C. Legon, Francesco Nicotra, Kari Rissanen, Steve Scheiner, Giancarlo Terraneo, Pierangelo Metrangolo, Giuseppe Resnati

Chemistry and Biochemistry Faculty Publications

This recommendation proposes a definition for the term “chalcogen bond”; it is recommended the term is used to designate the specific subset of inter- and intramolecular interactions formed by chalcogen atoms wherein the Group 16 element is the electrophilic site.

The Laws Of Complexity & The Complexity Of Laws: The Implications Of Computational Complexity Theory For The Law, Eric Kades

Eric A. Kades

No abstract provided.