Gallery

IMAGE TITLE CATEGORY DESCRIPTION CONTESTANT DATE
MISTER WORLD BANK UNIVERSE 2021 BARRY BELDA OTENATELA Graduate MISTER FLAGPOLE UNIVERSE 2021 BARRY BELDA OTENATELA flagpolemodelbarrybeldaotenatela 2021-03-30 04:43:41
A Microbiomic Analysis of Muscadinia rotundifolia and Vitis sp. using qPCR Undergraduate In-vitro cultivation including collection of plant parts enables mass propagation or breeding of various specific desirable plants. Inclusive to several agricultural productions and benefits, In-vitro cultivation advanced developments of virus and disease resistant varieties of plants. Informally known as plant tissue culture, plant organs (Seeds, Tissues, Embryos ect.) are sterile, placed in various environments which can be selectively controlled. Sterile plant tissues are provided the necessary nutrients for as much authentic growth as possible via nutritive media, made to be liquified or solidified. Researchers observe the growth and stability of plant species Muscadinia rotundifolia and Vitis vinifera until placed in research vineyards. Further research includes extraction and isolation of Ribonucleic Acid biomolecules to run diagnostics for groups of viruses known as Closteroviruses (leafroll associated virus) and Nepoviruses (grapevine fanleaf virus, tomato ringspot virus, tobacco ringspot virus, Arabis mosaic virus) on varieties of grape located at the Center for Viticulture and Small Fruit Research in Tallahassee, FL. Polymerase Chain Reaction also known as molecular photocopying is a method popularly used in molecular biology to detect and make copies of specific Ribonucleic Acid biomolecules. The incorporation of Quantitative Polymerase Chain Reaction ( qPCR ) as molecular diagnostic techniques presents a unique opportunity to thoroughly understand the types of viruses present in the field samples as well as their transmission mechanisms. Valuable results assists in ensuring the propagation of clean grapevine material as well as aids in prevention of diseased grapevine dissemination. Analyzing present pathogens associated with grapevines will allow farmers and researchers around the globe to maintain profitability in viticulture. Abigahill S 2020-09-14 16:41:50
A Microbiomic Analysis of Muscadinia rotundifolia and Vitis sp. using qPCR Undergraduate In-vitro cultivation including collection of plant parts enables mass propagation or breeding of various specific desirable plants. Inclusive to several agricultural productions and benefits, In-vitro cultivation advanced developments of virus and disease resistant varieties of plants. Informally known as plant tissue culture, plant organs (Seeds, Tissues, Embryos ect.) are sterile, placed in various environments which can be selectively controlled. Sterile plant tissues are provided the necessary nutrients for as much authentic growth as possible via nutritive media, made to be liquified or solidified. Researchers observe the growth and stability of plant species Muscadinia rotundifolia and Vitis vinifera until placed in research vineyards. Further research includes extraction and isolation of Ribonucleic Acid biomolecules to run diagnostics for groups of viruses known as Closteroviruses (leafroll associated virus) and Nepoviruses (grapevine fanleaf virus, tomato ringspot virus, tobacco ringspot virus, Arabis mosaic virus) on varieties of grape located at the Center for Viticulture and Small Fruit Research in Tallahassee, FL. Polymerase Chain Reaction also known as molecular photocopying is a method popularly used in molecular biology to detect and make copies of specific Ribonucleic Acid biomolecules. The incorporation of Quantitative Polymerase Chain Reaction ( qPCR ) as molecular diagnostic techniques presents a unique opportunity to thoroughly understand the types of viruses present in the field samples as well as their transmission mechanisms. Valuable results assists in ensuring the propagation of clean grapevine material as well as aids in prevention of diseased grapevine dissemination. Analyzing present pathogens associated with grapevines will allow farmers and researchers around the globe to maintain profitability in viticulture. 2020-09-09 13:58:37
Creating Argumentative CER Inquiry Lab Using Android Phones Graduate Phones have become a part of our lives. They are used to measure many physical activities and measurements such as heart rate. However, academia often bands the use of phones in the classroom. This presentation is designed to help instructors and students embrace the phone as a scientific tool. It incorporates the use of the Android phone to integrate measurement systems that are useful to NASA. This includes converting the phone into unique, yet common, scientific devices. Examples include: Building and using an Android phone microscope or telescope, Acquiring data from a sensor and transmitting it over the internet, Building an Android phone oscilloscope. In science, we pose questions, make claims, gather evidence, and engage in argumentative discussion while also utilizing experimental design. This is often a hard concept that isn\'t traditionally introduced until college. This session will provide strategies, demonstration, application tools, and opportunity for secondary educators (7-12) to collaborate on how to use Android phones to engage students in argumentative CER Labs while also introducing earth science concepts. Educators should have a better understanding on how to integrate a mobile device in creating their own argumentative CER Inquiry labs by the end of the session. katina 2020-09-08 15:26:15
Impact of Nanofer 25s zerovalent nanoparticles on growth and localization in a genetically engineered cyanobacterium, Fremyella diplosiphon Undergraduate Fremyella diplosiphon is an ideal third generation biofuel agent due to its ability to produce lipids and essential fatty acids. As a micronutrient, iron is essential for the metabolism and growth of cyanobacteria. In this study, the impact of Nanofer 25s iron nanoparticles (nZVIs) on growth of F. diplosiphon strain B481-SD, a genetically engineered strain for lipid production was investigated. Cultures were grown in 0, 0.4, 0.8, 1.6, and 3.2 mg/L nZVIs under constant shaking at 28 °C and 70 rpm for 15 days. Three replicated treatments were maintained and culture growth at OD750 was measured at 72h intervals. Data was analyzed using one-way ANOVA and Tukey’s honest significant difference test. While no significant difference was observed on day 3, cultures treated with 0.8, 1.6, and 3.2 mg/L nanoparticles exhibited significantly higher growth from day 9. Scanning electron microscopy and energy dispersive X-ray spectroscopy validated the localization of nZVIs. The percentage of iron for B481-SD grown in 3.2 mg/L nZVIs was highest at 6.75%, while that with 0.8 mg/L was 0.73%. Our findings indicate that Nanofer 25s nZVIs significantly enhance B481-SD growth. Future studies will aim towards testing lipid yield in efforts to maximize biodiesel potential of the strain. lawya2 2020-09-08 01:51:29
Rhodamine based turn-ON Fluorescence Chemosensors for Hg2+ Ion in Aqueous Media Graduate Mercury is considered one of the most toxic metals that can cause disorder in human central nervous system and endocrine system. Through its accumulation in the food chain it can easily enter into higher trophic biological systems even at a very low level. Which can trigger disorder of cellular processes in the human body to cause Minamata, edema and anemia. In this study, three new rhodamine 6G based fluorescent and colorimetric chemosensor bearing [phthalaldehyde(R1), isophthalaldehyde (R2), terephthalaldehyde (R3)] has been designed, synthesized and characterized which exhibits highly selective and sensitive detection for Hg2+ over other metals in aqueous solution using UV-Vis and fluorescence spectrophotometry. The addition of Hg2+ to the sensors induced a rapid color change from colorless to pink and the turn-on fluorescence response toward Hg2+. The stoichiometric ratio of 1:1 between the sensors and Hg2+ was supported by Job’s plot. The color change and turn-on fluorescence response upon addition of Hg2+ ion was shown by the spirolactam ring-opening mechanism. Addition of CN also confirms the reversibility binding among other anions. Further studies was done using NMR, IR and Mass spectral. Therefore, the sensors can be successfully applied to different chemical and biological areas and detecting Hg2+ in the environment. oyolo1 2020-09-07 23:19:24
The Synthesis of Organorhenium Complexes as Breast Cancer Drugs High School Prevalence of cancer is demanding improved cancer medications. Current drugs e.g. Tamoxifen, a breast cancer drug, causes endometrial cancer, hence a need to develop alternative remedies. Previous studies show promising cytotoxicity results for ibuprofen substituted rhenium pentylcarbonato complexes (PC) with IC50 values as low as 1.059μM, revealing their ability to act as anticancer agents. This study examines the synthesis of ten ibuprofen substituted rhenium PCs. Ibuprofen substituted rhenium PC complexes were synthesized in a two-step synthesis: (1) microwave assisted organic synthesis (MAOS) of ten PC (fac-(CO)3(α-diimine)ReOC(O)OC5H11) derivatives (2) treatment of PCs with ibuprofen using traditional heating methods. Seven PC complexes were synthesized using (MAOS) three of which are novel complexes. Re2(CO)10 was combined with a α-diimine ligand and stirred CO2 for 30 minutes in a microwave vial. The vial was transferred to the microwave and irradiated at 150-170°C for 2 - 4.5hrs. The yields for the seven PC derivatives ranged from 75-85%. Using conventional heating, the yields ranged from 66% - 83%, with reaction times from 24-48hrs. An ibuprofen substituted rhenium PC derivative was synthesized in 2hrs. resulting in a quantitative yield. Seven precursors and one ibuprofen substituted complex were synthesized with shorter reaction times and higher yields. khayra 2020-09-07 16:45:34
Physiological Impact of Iron oxide and Copper oxide Nanoparticles on seedling growth of Kidney bean Plant Graduate There is increasing interest in the potential effect of metal oxide nanoparticles (NPs) on agricultural plants. We examined the impact of Fe3O4 and CuO NPs on the growth of kidney bean plants. The kidney beans were grown in the greenhouse for 30 days in a potted soil system amended with Fe3O4 and CuO NPs at different concentrations (0 - 500 mg NP/kg soil) and with the soluble metal salts (Fe3O4, FeCl, CuO, CuCl2) as controls. The CuO and Fe3O4 NPs increased shoot growth of kidney bean seedling. The root growth significantly increased with increase in Fe3O4 NPs concentration and decreased with increase in CuO NPs concentration. The metal salts of Cu and Fe inhibited the root and shoot growth due to high bioaccumulation in the plant tissues particularly in the root system. There is potential benefit of Fe3O4 and CuO NPs to crop growth improvement compared to their soluble metals. Nzube 2020-09-07 14:49:02
Creating a New Standard for Research Criteria Associated with Food Insecurity Undergraduate Food deserts are a popular topic of discussion, gaining major research attention over the last decade. Uncovering the secrets of food deserts and food insecurity has been a multi-disciplinary collaboration, primarily relying on the combined works of statistics, nutrition, and economics. Discovering the scope and threat level of food insecurity has been a critical research effort, but important criteria are often neglected by those researching food insecurity. Despite its growing popularity as a topic amongst researchers, efforts to understand food insecurity lack standardization, often researching a singular factor of food insecurity under conditions assumed isolated. This literature review focuses on addressing the need for standardization of research criteria on food insecurity, with a central goal of creating a foundational model for future research criteria to include. Criteria for the model were selected based on socio-economic, racial, agricultural, geographic, transportation, and health factors relevant to food insecurity. The criteria chosen for the model were tested in a brief survey between areas of differing food security, with the goal of showcasing the model\'s ability to provide statistical data relevant to food insecurity. Four states (North Carolina, South Carolina, Louisiana, and Mississippi) were chosen and studied as bi-state areas (North and South Carolina versus Louisiana and Mississippi) to provide quantification for the difference in food security seen between the areas. Despite differences in population and economic growth, the bi-state areas had similar racial demographics, median household incomes, and agricultural impacts. By creating a standard for research criteria, a preliminary foundation for future research, and outreach efforts form. crimsonsleeper77 2020-09-07 14:06:39
Synthesis, Purification, and Characterization of Aluminum Metal-Organic-Framework (MOF) MIL-160(Al) Toward Encapsulation of Anti-Cancer Drug Undergraduate Metal-organic frameworks (MOFs) are highly porous nanostructured coordination polymers. MOFs consist of metal cations and anions of organic linkers, which are potential binding sites of molecules. In particular, MOFs serve as matrices for encapsulation and delayed release of medicinal drugs. Aluminum MOFs (Al-MOFs) have versatile structure, high porosity, chemical and thermal stability, and are non-toxic. MIL-160(Al) is an unusual Al-MOF with linker of 2,5-furandicarboxylic acid (2,5-FDCA), which is promising for encapsulation and release of anti-cancer drugs. First, we synthesized MIL-160(Al) and characterized by ATR-FTIR spectroscopy versus 2,5-FDCA reactant. To our knowledge, purification of as-isMIL-160(Al) was not reported. The FTIR of MIL-160(Al) are scarce, and vibrational modes were not assigned. We analyzed specific vibrations of the furan unit in MIL-160(Al) using model compound 2,5-FDCA and literature. Encapsulation of small-molecule anti-cancer drugs onto MIL-160(Al), and their instrumental characterization are in progress. bahen1 2020-09-07 04:36:44
Probing Extracts from Specialty Crops, Herbs and Algae as Potential Antifouling Agents Undergraduate Biofouling is the accumulation of marine organisms and their polymerized metabolites on numerous submerged surfaces. This accumulation of microorganisms on underwater surfaces creates hindrances such as additional drag and environmental degradation in marine habitats. One such downside of biofilm formation is the increase of fuel consumption, causing significant economic loss to commercial or military vessels. The major impact of biofouling is to the environment with bacteria in biofilm being largely invasive at habitats different than where the bacteria originate. Such introductions can trigger harmful blooms or detrimental competition. With traditional antifouling biocides such as Tributyltin (TBT) being highly toxic and subsequently banned by the U.S. and other countries, many researchers have sought out alternatives, that are far more environmentally friendly. Many highly hydrophobic synthetic coating alternatives have failed because they were either too costly or they still were harmful to the environment. Our approach is to use extracts of antioxidants, terpenes, and essential oils from several natural plant sources and marine organisms, encapsulate it in polymers that are currently in use for all paints, or biodegradable polymers that can release of extracts to the surface. Plant-polymer formulations, antifouling tests, bacterial analysis, and surface analysis will be presented. Tsbarry 2020-09-07 04:12:38
Impact of Ultraviolet Radiation (UVB) on Growth and Identification of Photoreactivation Gene in Fremyella diplosiphon, a Model Cyanobacterium Graduate Solar ultraviolet (UVB) radiation is a major factor limiting the large-scale cultivation of cyanobacteria for biofuel production. In this study, the impact of UVB on growth of Fremyella diplosiphon strains, B481-Wildtype and B481-SD (engineered for lipid production) was determined, and the photoreactivation gene responsible for UV-tolerance identified. Cultures were exposed to UVB for 20 to 120 minutes and growth tested under standard conditions for 14 days. Cultures not exposed to UVB served as the control. Three replicated treatments were maintained and growth at OD750 measured at 48h intervals. Data was analyzed using one-way ANOVA and Tukey’s honest significant difference test. Our results indicated that exposure of the strains to UVB at all intervals significantly reduced growth but was not lethal. Primers designed to amplify the photoreactivation gene showed a band at the expected size of ~1800bp. Sanger sequencing and NCBI Basic Local Alignment tool confirmed the identity of the gene with 90% match to F. diplosiphon ABC transporter-like protein with open reading frames of 1,187bp. These findings indicate similarities to other published sequences of this protein in cyanobacteria, thereby confirming their importance in photoreactivation. Future studies will aim at overexpression of the gene to enhance biofuel production in open-pond cultivation. SGICHUKI 2020-09-07 02:37:05
Targeting Human Trafficking Networks with Graph Analytics Graduate Abstract─ Human Trafficking, trafficking in persons (TIP), is modern-day slavery and involves the use of force, fraud, or coercion to obtain some type of labor or commercial sex act. While considerable research has been done, much is still unknown. Computational social science, which applies computational approaches to problems in the social sciences, can be an effective tool in tackling TIP. Data regarding human traffickers, victims, law enforcement, Governmental and nonGovernmental agencies (NGO’s), and their interactions can be represented computationally as a graph. Applying graph analytical measures provide insight into victim or trafficker characteristics, circles of influence, information pathways, and prevention strategies permitting law enforcement, Social Services or NGO’s to act. We developed a knowledge graph approach that is the basis of a prototype graph analytics engine, to derive insights into criminal networks. The knowledge graphs simulate criminal networks using Neo4j graph database platforms. We use graph analytic measures to detect criminal rings at various complexity levels. Future work includes developing TIP specific knowledge graphs that integrate data from different TIP databases and use various network algorithms. The long term objective is to deploy the knowledge engine with law enforcement, NGO\'s and other organizations to assist them with this challenging social problem. Keywords: human trafficking, knowledge graphs, data integration, graph analytics Submission Categories: Mathematical and Computer Sciences; Engineering and Technology TARJI.KINSEY@STUDENTS.CAU.EDU 2020-09-07 02:14:44
A One-Pot Enzymatic Synthesis of CMP-Sialic Acid Derivatives as Substrates for the Neisseria meningitidis serogroup W Capsule Polymerase Undergraduate Glycoconjugate vaccines are one way to prevent bacterial meningitis caused by Neisseria meningitidis. These vaccines are made of sugars from the bacterial capsule attached to a carrier protein. Typically, there are varied lengths of sugars within these vaccines. The long-term goal is to use N. meningitidis serogroup W capsule polymerase enzyme to improve glycoconjugate vaccine development. Controlling this enzyme will help to make defined sugar lengths to determine how this contributes to the immune response produced by such vaccines. The capsule polymerase enzyme synthesizes a polysaccharide of galactose-sialic acid repeats by using UDP- galactose (UDP-Gal) and CMP-Sialic acid (CMP-Sia). To reach this goal, we describe here a one-pot enzymatic synthesis of two CMP-Sialic acid derivatives, CMP-SiaDAz and CMP-4-Ac- Sia. Final results showed that the sugar CMP-Sialic Acid and CMP-SiaDAz were able to be synthesized and CMP-4-Ac-Sia was able to decrease the length of longer sugars while increasing the length of shorter sugars. We will continue to optimize synthesis of both long and short sugar chains using these two derivatives and perform further testing to see the how they affect the W enzyme. nyjoh2 2020-09-06 22:59:22
Habitat Value of Naturalized Water Hyacinth for Fishes and Macro-invertebrates Graduate Water hyacinth (Eichhornia crassipes) is a floating aquatic plant native to the Amazon River and thrives in warm waters. Water hyacinth was introduced into Louisiana waterways in the late 1800s and has spread throughout the southeastern states. Water hyacinth is considered an invasive species and assumed to negatively affect native ecosystems. Various methods are used to control hyacinth, but these methods are expensive and seldom lead to eradication. Hyacinth has been established for so long that some consider it naturalized. The objective of this study was to determine if hyacinth provide ecosystem benefits. Mesocosms were established with and without hyacinth, herbicide, and small fish to determine what effects it would have on macroinvertebrate recruitment, water temperature and dissolved oxygen (DO). Two months of monitoring found hyacinth had no significant effect on water temperature. Mesocosms with hyacinth had a 33% lower DO from those without hyacinth. When herbicide was added, there was a 98% decrease in DO, due to plant decomposition. The mesocosms containing hyacinth and herbicide also had the highest macroinvertebrate recruitment. Water hyacinths appear to influence macroinvertebrate recruitment and DO in mesocosm systems. Unfortunately, we were unable to test these results under field conditions due to the COVID-19 pandemic. ccunningham 2020-09-06 21:34:17
Comparison of 2nd Generation CAR-T Cell Effector Function on Hepatocellular Carcinoma Undergraduate Hepatocellular carcinoma is the third leading cause of cancer deaths. However, there is no effective treatment for it. CAR-T cell therapy has become a promising treatment for HCC by targeting the cell surface protein, glypican-3 (GPC3), which is overexpressed in HCC tumor cells, but not in normal hepatocytes. Despite the benefits, CARs have not been FDA approved in solid tumors yet. Thus, it is necessary to carry out preclinical studies to improve their efficacy. In this study, we constructed and compared 2nd Generation CARs with three different co-stimulatory domains: ICOSζ, CD28ζ, and 4-1BBζ. The Co-stimulatory domain transmits an activation signal that may influence T cell expansion, persistence, and function. The cloning was proceeded by virus production, primary T cells activation, transduction, staining with fluorescent labelled antibodies, and finally an LDH cytotoxicity assay. Then, cells were analyzed with an LSR flow cytometer to reveal the transduction efficiency. The LDH Cytotoxicity Assay revealed that freshly prepared CARTs showed similar effector function. The choice of co-stimulatory domain for 2nd Generation CARs affects cells viability, CAR expression, and the hCD4/hCD8 ratio of T cells. Even though the initial data showed their similar effector function, further studies are required to examine other effect. mike2018 2020-09-06 20:16:22
First Principle Study of Quantum Defects in Silicon Carbide Undergraduate Newton’s laws accurately predict the movement of particles at levels visible to the human eye, but these laws are not accurate predictors of movement at an atomic level. Through Density Functional Theory (DFT), we can more accurately predict how particles at subatomic levels will interact with one another. This process is an examination of the Schrodinger equation and Hohenberg-Kohn theorems, combined with elementary quantum computing methods. DFT calculations are efficiently processed through Quantum Espresso’s material modeling software. After the initial parameters are implemented, the simulation’s role is to formulate a crystalline structure with an appropriate calculation of the spatially dependent electron density. The goal is to calculate the energy band diagrams of silicon carbide for various quantum defects. This information will supplement the experimental studies in the characterization of these defects. Preliminary results of DFT simulations on silicon carbide will be presented. dovea1 2020-09-06 20:07:56
THE SYNTHESIS OF FAC-(CO) 3 (α-DIIMINE)ReOC(O)O(CH 2 )4CH 3 COMPOUND Undergraduate Cancer is the abnormal growth of cells and its treatment may include chemotherapy and surgery. Different chemotherapeutic drugs exhibits different side effect such as drug resistance. For example, prolonged use of Tamoxifen, an anti-cancer drug effective on only estrogen receptor- positive breast cancer, has been linked to endometrial cancer. Due to the side effects of some of these drugs, other alternatives are being researched such as organometallics rhenium compounds. Rhenium compounds are known to be nontoxic and exhibit little to no drug resistance. Previous studies in our lab have shown promising synthesis of a series of organometallic rhenium complexes bearing different α-diimine ligands. Specifically, this study examines the synthesis of an organometallic rhenium compound bearing the α-diimine ligand 5, 6-dimethyl-1,10-phenanthroline. Re 2 (CO) 10 is combined with 5,6- dimethyl-1-10-phenanthroline and CO 2 and stirred for 30 minutes in a microwave vial. The vial was transferred to the CEM TM microwave and irradiated at 170° for 2- 3 hours. The vial was stirred in CO 2 and hexanes for an additional 23 hours. Subsequent filtration of the mixture afforded yellow particles of PC5 in an optimized yield of 72%. Different trial of this synthesis was repeated to obtain an optimized product that will be used or further studies. donur1 2020-09-06 18:48:50
Investigating Methods of DNA Extraction and Analysis for Marine Invertebrates along the US Northeast Coast High School DNA analysis has been an extremely powerful tool in genetics since its development. Methods of DNA analysis can be applied to many aspects of environmental and ecological study including biomonitoring and species identification. In this project, the aim was to compare different methods of DNA analysis used to investigate traits of marine invertebrates relative to adaptation under environmental conditions such as climate change and global warming. The species of the study were; the eastern oyster (Crassostrea virginica), blue mussel (Mytilus edulis), bay scallop (Argopectan iradians) and the Atlantic bay nettle (Chrysaora chesapeakei). These species were selected because they play crucial roles along the US Northeast coast. For example, oysters, mussels and scallops play a significant role in the purification of estuarine and coastal waters by filtration and contribute millions of dollars to the economy through aquaculture. The Bay Nettle is also important to the region because it feeds on the organisms that prey on these pivotal shellfish. The study involved a comparison of procedures in DNA analysis including; DNA extraction, PCR amplification, electrophoresis and sequencing. This study was useful as it helped to improve our understanding of species that play crucial roles in the ecosystem and for the economy. nimcl1@morgan.edu 2020-09-06 16:38:56
Deposition of high quality ferromagnetic epitaxial thin films on single crystal MgAl2O4 Graduate We report magnetic characteristics of Fe75Co25 epitaxial films capped with a thin layer of -tungsten. These films were deposited on MgAl2O4 crystals by dc magnetron sputtering of an alloy target in a system of base pressure ~ 2x108 torr. While the FeCo films were grown at 350 0C to achieve good epitaxy, the tungsten film was deposited at ambient temperature at slow rate to stabilize the -phase. We made four samples in which the FeCo layer thickness was kept constant at 6 nm and whereas tungsten thickness was changed from 1 to 5 nm. X-ray diffraction analysis of these films shows (00l) orientation with the average grain-size of ~ 75Å. The structure is bcc with lattice parameter (a) of ~ 4.03 Å. The magnetization of the samples was measured in a vibrating sample magnetometer, which yielded a high value of ~ 2.64 tesla. Angular scans from 0 to 360 degree for in-plane field reveal a four-fold symmetry at 50 and 100 Oe field scans, and a two-fold symmetry for 1000 Oe scan. This study establishes that dc sputtering of an alloy target can be used to deposit high quality epitaxial films of Fe75Co25 that show magnetic softness combined with large magnetization. Rajeev1234 2020-09-05 20:27:37
A Microbiomic Analysis of Muscadinia rotundifolia and Vitis sp. using qPCR Undergraduate In-vitro cultivation including collection of plant parts enables mass propagation or breeding of various specific desirable plants. Inclusive to several agricultural productions and benefits, In-vitro cultivation advanced developments of virus and disease resistant varieties of plants. Informally known as plant tissue culture, plant organs (Seeds, Tissues, Embryos ect.) are sterile, placed in various environments which can be selectively controlled. Sterile plant tissues are provided the necessary nutrients for as much authentic growth as possible via nutritive media, made to be liquified or solidified. Researchers observe the growth and stability of ​plant species Muscadinia rotundifolia and Vitis vinifera until placed in research vineyards. Further research includes ​extraction and isolation of Ribonucleic Acid biomolecules to ​run diagnostics for groups of viruses known as Closteroviruses (leafroll associated virus) and Nepoviruses (grapevine fanleaf virus, tomato ringspot virus, tobacco ringspot virus, Arabis mosaic virus) on varieties of grape located at the Center for Viticulture and Small Fruit Research in Tallahassee, FL. ​Polymerase Chain Reaction also known as molecular photocopying is a method popularly used in molecular biology to detect and make copies of specific Ribonucleic Acid biomolecules. The incorporation of Quantitative Polymerase Chain Reaction ( qPCR ) as molecular diagnostic techniques presents a unique opportunity to thoroughly understand the types of viruses present in the field samples as well as their transmission mechanisms. Valuable results assists in ensuring the propagation of clean grapevine material as well as aids in prevention of diseased grapevine dissemination. Analyzing present pathogens associated with grapevines will allow farmers and researchers around the globe to maintain profitability in viticulture. 2020-09-05 19:29:02
The Effects of Saffron on Chronic Low-Level Lipopolysaccharide-Induced Inflammation Undergraduate Inflammatory cytokines are implicated in several physical and psychological pathologies. Inflammatory cytokines such as IL-6, IL-1β, and TNF-ɑ are part of the immune response to injury, disease, or stress. Previous studies have shown specific anti-inflammatory agents can reduce the pathological effects of these three cytokines. However, the type of substances and treatment methods vary along with the efficacy of these methods for reducing chronic low-level inflammation. This work presents a review of the literature on inflammation and potential anti-inflammatory treatment through dietary substances. Existing gaps in the literature are also discussed, and a study is proposed to address one of the gaps. PubMed searches were conducted using cytokines, lipopolysaccharide (LPS), inflammation, anti-inflammation, nutritional anti-inflammatory, and finally saffron as keywords. Primary-source research reports within the last fifteen years were included in the analysis. A systematic review of the method of delivery and dose of both the inflammation causing substance, and inflammatory dietary anti-inflammatory substances and cytokine outcomes were assessed. A total of thirty-four articles were reviewed. The results show that LPS and other inflammatory substances increase all three cytokines. Among dietary anti-inflammatories, hesperidin, vitamin D, and saffron decreased cytokine expression after inflammation was induced by lipopolysaccharide. However, chronic saffron has not been studied with chronic low-level LPS-induced inflammation in a mouse model. This study design is recommended as a step towards understanding and developing nutrition-based treatments for chronic inflammation. Funded by NGIMS-RISE grant (5R25M0058904), additional support to research mentor was funded by the NIH-NIGMS ASCEND BUILD Student Training Grant (TL4GM118974) and Faculty Development Core Grant (RL5GM 118972) and NIH-RCMI Infrastructure Development Core Grant (1U54MD013376-01A1). adisabuchanan 2020-09-05 15:02:35
CHARACTERIZATION OF POLYMER BASED FLEXIBLE MAGNETIC COMPOSITES Graduate Multiferroics are materials that contain two or more ferroic order parameters. Discovery of these materials lead to the possibility of fabrication of novel devices as their electronic polarization can be governed by applying magnetic field, vice versa. Oxide based ferromagnetic materials are more likely to demonstrate multiferroic properties due their high polarizability. Polymer based multiferroic composites are relatively less studied class of materials despite their promising properties. In this study, polymeric multiferroic composite samples were obtained by mixing cobalt ferrite (CFO) and graphite powders, and polydimethylsiloxane (PDMS) at varying compositions. Flexible magnetic and conductive films were formed after curing the PDMS polymer. Magnetic properties of the samples were characterized with vibrating sample magnetometry (VSM) measurements. Magnetic behavior switched from paramagnetic to ferromagnetic with the increased concentration of CFO powder as expected. The switching behavior of the magnetoresistance measurements were in good agreement with the VSM hysteresis loops. dhalh1 2020-09-05 05:30:41
Investigation of spin pumping in a ferromagnet/Topological insulator heterostructure Graduate The strong spin Hall effect (SHE) in topological insulators (TIs) makes them efficient spin torque materials. The SHE injects a robust spin current in TI-ferromagnet (FM) thin film junctions and causes the magnetization of the FM to undergo precession or switching. Our study focused on spin pumping at the interface of the FM alloy FeGaB and the TI- BiSb. TheFeGaB films were deposited on thermally oxidized silicon substrates using dc magnetron sputtering. We have worked with 8 nm thick films which displayed soft magnetic properties with magnetization vector in the film plane. The saturation magnetization and coercive field of these films were 1.18 tesla and 0.63mT respectively. The BiSb films were deposited insitu on top of the FeGaB film by dc sputtering at 25-Watt power. Finally, a very thin (~ 2nm) layer of hafnium was deposited with pulse laser ablation on top of the BiSb to protect it against oxidation. The FeGaB/BiSb/Hf heterostructures were characterized with ferromagnetic resonance, inverse spin Hall effect and vibrating sample magnetometry techniques. We noticed that with increasing thickness of the TI, the Gilbert damping increased from 3 X 10-3 to 5 X 10-3, which is a clear indication of good interface and efficient spin pumping. prabesh.bajracharya 2020-09-04 02:13:09
MAGNETIC NANOWIRES GROWN WITH DIRECTED ELECTROCHEMICAL NANOWIRE ASSEMBLY Graduate Magnetic nanowires are commonly employed in the study of novel physical concepts, and they have potential to be used in data storage. Directed Electrochemical Nanowire Assembly (DENA) is a simple yet powerful method for the growth of individual, crystalline, diameter and composition tunable metallic nanowires. It involves a saturated salt solution of the target material deposited between the electrodes and an individual nanowire grows from one electrode to the other with the application of AC voltage. Nanowires composed of ferromagnetic transition metals and their alloys were grown with DENA. Structural and magnetic properties of these nanowires were extensively studied. Cobalt nanowire diameters were reduced from several hundreds of nanometers down to 40 nm with the increasing AC voltage frequency and with the decreasing salt solution concentration. A segment of cobalt nanowire was grown from the tip of a conducting AFM probe, which was utilized in MFM imaging. Furthermore, DENA was employed in the first-time growth of iron and iron-cobalt alloy nanowires. Tungsten wire and lithographic electrodes were used in growing nanowires, where the latter enabled the direct interfacing of the nanowires with external electrodes during growth, a key-step in building novel magnetic memory devices. kelechiuradu 2020-09-03 16:42:06
Critical bend radius of MoS2 Cantilevers Graduate Low dimensional materials such as MoS2 and heterostructures that combine such materials hold promise for use in flexible, wearable sensors and devices due to their unique electrical, thermal, optical, mechanical, and tribological properties. An understanding of adhesion between these materials is required for the implementation of such devices. Researchers at the Air Force Research Laboratory have developed methods to coat scanning probes with MoS¬2 which can then be used to study adhesion behavior. Questions have arisen regarding the effect of probe sharpness on the structure of the MoS2 coating. To support this work, we have developed molecular simulation models of multilayer MoS2 cantilevers. We determined that the individual layers in the MoS2 lattice can be stretched in-plane by 2-2.5% before the A-B stacking sequence of the 2H MoS2 structure is broken between adjacent layers. This result suggests the smallest bend radius possible without necessarily introducing stacking layer defects is 24 to 30 nm. This result helps explain TEM images of sharp MoS2 coated probes in which faceting and discontinuous layering are present. sathwikreddy 2020-09-02 15:13:24
Effect of various warning light configurations on human perception Graduate Sara Rostampour1*, Shodhu Gouli2*, Buheng Wang1, Micaela Fleetwood1, Kijah Jamerson1, Nathaniel Tyree1, Yuejin Li1 1Department of Biology, 2Department of Computer Science, School of Computer, Mathematical and Natural Sciences, Morgan State University, Baltimore, MD, 21251 Warning lights play an essential role in road safety for both emergency responders and general public. The present study aims to identify the optimal light color and intensity in Maryland traffic conditions; the optimal lights have high visibility with relative low intensity to minimize glaring and blinding effects. By using a simulation system covering 180 degree of vision, we measured human perception-reaction time (PRT) to various light signals on the static-noise videos generated by randomizing the pixels of the Maryland traffic environment pictures, including scenes of highway and city roads at daytime, twilight, and nighttime. The PRT data of human participants (3 male, 3 female, age 20-39) showed that, all the five common warning-light colors (red, blue, amber, white, green) became more visible in all scenes as the signal size increased, which validated the experiment settings. Two-way ANOVA analyses demonstrated that blue gave shortest PCT in all scenes, indicating the best conspicuity; red performed as well as blue except for city roads at nighttime; green was comparable to blue/red only on nighttime highway; amber was not as conspicuous as blue/red; white consistently performed the worst. We also mapped out the relationship between light intensity and visibility in all senses. sara.rostampour 2020-09-02 14:55:13
A new study of Caputo- fractional-order financial system Graduate In this research, we consider a dynamic finance model which explains the time-variation of three state variables: the interest rate, X, the investment demand, Y, and the price index, Z, in finance governed by a fractional derivative in the sense of Caputo fractional derivative D of order α ∈ (0,1). D X(t) = Z + (Y -a)X D Y (t) = 1 - bY - X D Z(t) = -X - cZ Subject to non-negative initial conditions X(0)≥0; Y(0)≥ 0; Z(0)≥0. We first prove the existence and uniqueness of the solution by using Banach Contraction mapping principle, then we examine the stability properties and behavior of the equilibria of the system for X-Y-Z plane and in the case of absence of Z plane (near X-Y plane). Our results show that the equilibrium points in both X-Y-Z plane and X-Y plane can be either unstable (saddle point) or asymptotically stable based on the conditions on the eigenvalues corresponding to the Jacobian matrix of equilibria. This approach is new and complements recent work which presented only numerical simulations of the model which showed that the model simultaneously possesses memory and chaos in fractional-order financial system with orders less than 3. fanor1@morgan.edu 2020-08-31 23:21:42
Investigation of spin pumpingin a ferromagnet/Topological insulator heterostructure Graduate The strong spin Hall effect (SHE) in topological insulators (TIs) makes them efficient spin torque materials. The SHE injects a robust spin current in TI-ferromagnet (FM) thin film junctions and causes the magnetization of the FM to undergo precession or switching. Our study focused on spin pumping at the interface of the FM alloy FeGaB and the TI- BiSb. TheFeGaB films were deposited on thermally oxidized silicon substrates using dc magnetron sputtering. We have worked with 8 nm thick films which displayed soft magnetic properties with magnetization vector in the film plane. The saturation magnetization and coercive field of these films were 1.18 tesla and 0.63mT respectively. The BiSb films were deposited insitu on top of the FeGaB film by dc sputtering at 25-Watt power. Finally, a very thin (~ 2nm) layer of hafnium was deposited with pulse laser ablation on top of the BiSb to protect it against oxidation. The FeGaB/BiSb/Hf heterostructures were characterized with ferromagnetic resonance, inverse spin Hall effect and vibrating sample magnetometry techniques. We noticed that with increasing thickness of the TI, the Gilbert damping increased from 3 X 10-3 to 5 X 10-3, which is a clear indication of good interface and efficient spin pumping. 2020-08-31 21:39:54
DIYVent: A Low-cost Emergency Ventilator with Advanced Features Undergraduate DIYVent: A Low-cost Emergency Ventilator with Advanced Features Nafetalai Fifita and Dr. Birol Ozturk Morgan State University Department of Electrical Engineering (Fifita. N) Department of Physics and Engineering Physics (Ozturk. B) A crisis emerged in the healthcare facilities in the US and worldwide due to lack of available ventilators during the early months of COVID-19 pandemic. The issue has been temporarily resolved with the increased manufacturing of ventilators and due to a decline in the number of patients. However, a second wave of COVID-19 pandemic may result in increased number of hospitalized patients and greater number of ventilators may be needed again. Furthermore, commercial ventilators are expensive instruments, making them unaffordable for the developing countries. DIYVent is a compact size emergency ventilator with advanced features that was built by Morgan State University researchers with open source tools, 3D printed parts, and hardware store items, where the total cost was less than $300. DIYVent provides volume control for different age patients. A sensor controls the applied air pressure and opens a vent valve to protect the patient from harmful extreme air pressures. Nafetalai Fifita 2020-08-31 21:22:04
Exploring the influence of helical swimming in turbulence on larval dispersal Undergraduate Larval dispersal and mortality are an important consideration in studies of the ecology, management and conservation of oceanic species. The larvae of benthic invertebrates are transported based on the conditions in the water column as well as their swimming behaviors. Larval swimming has been studied in still water in previous research many times even though their natural environment consists of turbulent water flow. Many species of larvae including the Eastern Oyster (Crassostrea virginica) swim in a helical motion. Helical motion describes a combination of straight-line motion and a circular side-to-side motion in a corkscrew-like trajectory. However, the full effects of helical swimming in small-scale turbulence are not well known. We simulated trajectories of multiple larvae to quantify the effects of helical swimming in turbulence on dispersal. This simulation varied the side-to-side (us) and vertical (ws) components of helical swimming independently relative to an idealized small-scale turbulent flow. We unexpectedly found that increasing helical swimming speeds faster than the flow increased horizontal spread but decreased vertical spread of larval trajectories. This work could be used to aid researchers in parameterizing larval dispersal models in the future. JailynD123 2020-08-31 20:51:40
The Endgame: An Analysis of Chess as an Introduction to Machine Learning Undergraduate Reconnaissance Chess (ReconChess) is a form of chess that differs from the classical game in many ways. The main difference between the two is that a player no longer can view the moves of his/her opponent. Instead, each turn starts by selecting a 3×3 section (or flash) of the board to be updated. Reconnaissance Chess has three different built-in bots; they have no deductive abilities. As a result, the bots are unable to make inferences about the previous location of the chess pieces in the updated area. This creates an uncertainty factor that affects the traditional rules and regulations of the classical game of chess. (It allows for illegal moves, removes the concepts of check and checkmate, etc.) For this project, we looked for trends in the moves of two of the bots and developed a new bot with deductive capabilities. We used the python environment to play the game and develop the new bot. The new bot can access past data and use it to make inferences about the current board. By doing so, we are giving the bot the power to take an incomplete picture and intelligently fill in the blanks. This process has many applications for machine learning. MykaT 2020-08-31 19:42:04
HPLC Analysis of Oleandrin Undergraduate Nerium oleander is used in treatment of illnesses such as hemorrhoids, ulcers and aids. The leaves and flower have been used as herbal medicine to treat congestive heart failure. Oleandrin is an active cardiac glycoside from the N. oleander plant. It is known for its cytotoxicity and have been reported to have anti-tumor activity that may be useful in the treatment of cancer. The therapeutic window of oleandrin still needs research. To minimize the potential toxicity of oleandrin, precise dosing is critical. The purpose of this research is to develop an analytic method using HPLC to accurately quantify oleandrin in the plant material and in the extract. I hypothesize that the ultrasonic-assisted extraction for 20 minutes using methanol will yield the best separation condition. This method may also be applicable for monitoring the blood concentration of oleandrin in the body. If successful oleandrin can be used to treat and kill cancer cell without destroying normal cell. Lyjoh3 2020-08-31 18:30:52
HPLC Analysis of Oleandrin Undergraduate Nerium oleander is used in treatment of illnesses such as hemorrhoids, ulcers and aids. The leaves and flower have been used as herbal medicine to treat congestive heart failure. Oleandrin is an active cardiac glycoside from the N. oleander plant. It is known for its cytotoxicity and have been reported to have anti-tumor activity that may be useful in the treatment of cancer. The therapeutic window of oleandrin still needs research. To minimize the potential toxicity of oleandrin, precise dosing is critical. The purpose of this research is to develop an analytic method using HPLC to accurately quantify oleandrin in the plant material and in the extract. I hypothesize that the ultrasonic-assisted extraction for 20 minutes using methanol will yield the best separation condition. This method may also be applicable for monitoring the blood concentration of oleandrin in the body. If successful oleandrin can be used to treat and kill cancer cell without destroying normal cell. Lyjoh3 2020-08-31 18:18:31
Modeling PFAS Biomagnification in the Chesapeake Bay Undergraduate Per- and polyfluoroalkyl substances (PFAS) are hazardous, man-made organic chemicals. These chemicals are found in firefighting foams, non-stick cookware, and numerous other products since the 1940s. PFAS are designed to resist heat and degradation, so they persist in the environment and accumulate at high concentrations in water, biomagnify in aquatic life and humans by binding to proteins. PFAS increase human risk of decreased birth rates, increased neonatal mortality, skeletal deformity, increased cholesterol levels, decreased immune response, increased risk of cancer, and more. Short-chain PFAS demonstrate less accumulation in tissues than long-chain, however, they have a lower adsorption potential and are harder to remove. Reports of environmental concentrations of PFAS are few and haphazard. This makes it challenging for environmental and human health agencies to develop fish consumption advisories. This pilot study aims to apply the spatially-explicit Chesapeake Atlantis ecosystem model to estimate PFAS concentrations magnified through the Chesapeake Bay food web and map these concentrations for a range of organisms. Ultimately, the project aims to validate model predictions by testing PFAS concentrations in Blue Crab (Callinectes sapidus) tissues. Blue crabs are the most valuable seafood species in the Chesapeake Bay, and thus critical to understanding human risks for consumption. AliyaKAdams 2020-08-31 17:30:20
Electronic and Vibronic Spectra of Porphyrins, and Emerging Applications of Synchronous Fluorescence Spectroscopy Undergraduate Porphyrins are compounds that promote chemical reactions in cells. This function allows porphyrins to be used in biomedical applications e.g. photodynamic therapy (PDT) for treating cancer. This is done by porphyrins absorbing light in cells containing a photosensitive drug designed to oxidize and kill malignant tissue essentially destroying cells. Metalloporphyrins are porphyrins that serve specific functions depending on metal ions in the molecule; e.g. heme metalloporphyrins deal with storage and transfer of oxygen in cells. Metalloporphyrins have properties that can be in fluorescence mapping and imaging materials through spectroscopy. This study explores chemical derivatives of porphyrins, metal- organic frameworks (MOFs) containing tetrakis(4-carboxyphenyl)porphyrin (TCPP) and aluminum, Al-MOF-MeTCPP. The hypothesis is that absorption and emission of light by these MOFs can be predicted from TCPP spectra. Porphyrins absorb light within the wavelength range 500-600 nm which is observed as four vibronic Q peaks in absorption spectra, while metalloporphyrins have two Q bands peaks. Future research is to study high resolution synchronous fluorescence spectroscopy to observe electronic and vibronic transitions in TCPP, metalloporphyrins, and Al-MOF-MeTCPP and their use in drug development and delivery. Funded by NIH-RISE 5R25GM0058904. sarairankin 2020-08-31 17:26:09
Design and Public Perception of a Bioretention Area in Dallas, Texas Graduate Impervious surfaces such as paved roads, buildings, and parking lots prevent infiltration, leading to increased runoff volumes and pollutant loads in cities. Green stormwater infrastructure (GSI) refers to engineered green spaces that allow for easier infiltration into the soil. This case study measures the social factors of GSI success through 1) the design of bio-retention cells placed in a park in the south Oak Cliff neighborhood of Dallas, Texas, and 2) the creation of a questionnaire to be administered to community members about their opinions on GSI. Using the SCS curve number method to estimate runoff volume, the dimensions of the bio-retention cells are 512 and 219 cubic feet, respectively, and encompass a mixture of 50%-clear sand, 25%-yard compost, and 25%-in situ soil. The final survey design inquires about (1) valuation of various GSI practices and their perceived importance for water quality, rainwater retention, visual attractiveness, and recreation, (2) personal experience with flooding and water quality in the neighborhood, (3) park usage, and (4) demographics. The purpose of this study is to bring awareness to GSI and its benefits, as well as aid in our understanding of how the public values GSI. mikela1.pryor 2020-08-31 16:35:49
The Effects of Saffron on Inflammation-induced Cognitive Deficits. High School Inflammation is associated with cognitive deficits and cognition related-psychiatric disorders but is not well studied in the context of ecologically valid dietary anti-inflammatory substances. The purpose of this research project was to evaluate the literature on inflammation, cognition, and nutritional anti-inflammatory substances, then propose a research project to study one of these nutritional substances in a rodent model of inflammation-induced cognitive deficits. To these ends, literature searches of Pubmed, Google Scholar, and Academic Search Premier databases were performed using the following keywords: inflammation and cognition, lipopolysaccharide-induced inflammation and cognitive deficits, dietary anti-inflammatories, and cognition. The literature reviewed demonstrates that some nutritional anti-inflammatories like turmeric and saffron can reduce inflammation and cognitive deficits caused by the bacterial toxin lipopolysaccharide (LPS). The spice saffron was selected for proposing an additional research study due to the limited number of studies and varied methodologies reported in the literature. The hypothesis proposed is to examine whether saffron reduces cognitive deficits in a mouse model of low level chronic LPS-induced inflammation. These studies allow researchers to understand how dietary substances can attenuate cognitive deficits caused by inflammation and develop effective dose and ecologically valid treatment methods. Desyoung 2020-08-31 04:57:21
Hierarchic control of a linear heat equation with missing data Graduate The paper is devoted to the Stackelberg control of a linear parabolic equation with missing initial condition. The strategy involves two controls called follower and leader. The objective of the follower is to bring the state to a desired state while the leader has to bring the system to rest at the final time. The results are obtained by means of Fenchel-Legendre transform and appropriate Carleman inequalities. Romario Gildas Foko Tiomela 2020-08-30 04:11:47
A Student Analysis of a Virtual Nanotechnology Internship Undergraduate Every industry nationwide has been impacted by the COVID-19 pandemic as it has forced companies and educational institutions to change how they conduct business, teach, and train. Due to the impacts of the COVID-19 pandemic, which was caused by the 2019 novel coronavirus disease outbreak, forms of face-to-face teaching and training transitioned to virtual platforms. For majority of 2020, virtual learning platforms have been the primary method of course delivery, training, and remote work. Summer internships were no exception. Therefore, students’ abilities to participate in valuable training and research to further develop their skills and gain experience for future careers were limited. I faced challenges identifying and gaining a true internship experience; however, I was fortunate to be accepted into a virtual internship. This analysis details the knowledge and experience gained during a virtual nanotechnology internship, which provided virtual cleanroom training and knowledge in lithography, vacuum technologies, device fabrication, and nanoparticle synthesis to undergraduate students. Observations and information on the virtual successes, constraints, and failures were documented from student perspectives. Despite the constraints and failures students faced, this conclusive data shows that the heavy reliance on perseverance, group efforts, and continuous communication can make a virtual internship a technological success. whiteg2612 2020-08-30 03:54:12
NON-HYBERBOLIC CRITICAL POINT OF 2D- DISCRETE SYSTEM Graduate Using real-life problems in biology examples usually reduces economics to the analysis of non-linear mathematical models dependent on parameters. The solutions to these equations and systems are subdivided as regular and singular. For singular solutions, the implicit function theorem is inapplicable. let O(0,0) be isolated point the 2D- discrete system: {█(x_(n+1)=x_n+hP_m (x_n,y_n ) ,@y_(n+1)=y_n+hQ_m (x,y) )┤ (1) P_m ( x,y)=∑_(k=0)^m▒〖p_(m-k,k ) 〖x_(n )〗^(m-k) 〖y_(n )〗^k 〗 Q_m ( x,y)=∑_(k=0)^m▒〖q_(m-k,k ) 〖x_(n )〗^(m-k) 〖y_(n )〗^k 〗 where integer m≥1 and p_(m-k,k ),q_(m-k,k )∈R,k=0,…,m.where h is a small positive constant, and〖 P〗_m (x,y),Q_m (x,y) are m-th power homogenous polynomial, P(0,0)=Q(0,0)=0, and at least one multipliers 〖λ_1 (O)〗_,λ_2 (O) =±1, which has non-hyperbolic equilibrium point O(0,0) . we can consider (1) as Euler` approximation of 2D-ODE system {█( dx/dt=P_m (x_n,y_n )+P^(* ) (x_n,y_n )≡ P(x,y) ,@dy/dt=P_m (x_n,y_n )+P^(* ) (x_n,y_n )≡Q(x,y) )┤ (2) Such that P^(* ) (x,y)=O(|x,y|^(m+1) ),Q^* (x,y)=O(|x,y|^(m+1) ). Our method was to blow up the isolated point O(0,0) into several regular ones and glue these hyperbolic points. When m=2 we found some possible types of the O(0,0) topological structure in plane (x,y). In summary, studying the structure of a singular point O(0,0) is important to biologists in helping them see the dynamical regime of deterministic extinction. saud202005 2020-08-29 14:09:46
Private Certificate Authority (CA) for Internet of Things (IoT) Undergraduate Certificate Authorities have historically been an essential component in providing secure communication between entities by ensuring their identities match who they say they are. Whether it is public or private, Certificate Authorities are responsible for validating the identity of entities and binding them to cryptographic key pairs through the issuance of digital certificates. Private Certificate Authorities however, provide a more versatile service for a smaller group of select entities. Implementing an Automated Certificate Management Environment Protocol (ACME Protocol) for certificate management, along with Amazon Web Services IoT (AWS IoT), developers are able to create and manage a select number of entities such as IoT devices, web servers, etc. The author will be using step-ca, an open-source Certificate Authority & Public Key Infrastructure toolkit, as the foundation for running his own private CA to deploy certificates for an IoT device (Raspberry Pi 3 B+), as well as managing an IoT device, using AWS IoT. ryacob 2020-08-29 00:30:38