Digital Commons Network^™

Nutrient Accumulation In The Sediment Of Silvofishery Ponds In Semarang, Endah Dwi Hastuti, Rini Budihastuti

Makara Journal of Science

Information concerning the functionality of mangrove within silvofishery ponds is needed, especially relating to the accumulation rate of organic materials and nutrients. This research studied the effect of mangrove structure on the accumulation rate of nutrients within silvifishery ponds. The research, conducted in May 2016, used canals of width 1, 2, and 3 m, with mangrove species Avicennia marina and Rhizophora mucronata, alone or in combination. Nutrients measured were nitrogen, phosphorus and organic matter, in the sediment of the treatment ponds, through soil sampling followed by laboratory analysis. The respective analysis methods used were Kjehdahl, spectrophotometry, and ashing. Data analysis …

Activity Of Cytotoxic Flavanoids Against A P-388 Murine Leukemia Cell Line From The Stem Bark Of Aglaia Elliptica (Meliaceae), Ace Tatang Hidayat, Kindi Farabi, Desi Harneti, Rani Maharani, Nurlelasari, Unang Supratman, Yoshihito Shiono

Makara Journal of Science

Two mixtures of flavanoid compounds (1 and 2), a mixture of catechin (1a) and epicatechin (1b), and a mixture of gallocatechin (2a) and epigallocatechin (2b), were isolated from the active fraction of the stem bark of Aglaia elliptica methanol extract. The chemical structure of the compounds was identified with spectroscopic data, including UV, IR, NMR (1H, 13C, DEPT 135°, HMQC, HMBC, 1H-1H COSY), and MS, and additionally compared with previously reported spectral data. All compounds were evaluated for their cytotoxic effects against P-388 murine leukemia cells. Compound 2 showed cytotoxicity against the P-388 murine leukemia cell, with an IC50 value …

Mitigating Projected Impacts Of Climate Change And Building Resiliency Through Permaculture: A Community ‘Bee Inspired Gardens’ Movement In The Desert Southwest, Usa, Roslynn Brain, Jeffrey Adams, Jeremy Lynch

Environment and Society Faculty Publications

Permaculture, an integrative design process creating resilient and productive landscapes and communities, can serve as a useful mitigation tool for projected climate change impacts. In the United States, the desert southwest town of Moab, Utah, has employed permaculture design in a community initiative called ‘Bee Inspired Gardens.’ This initiative has harnessed social capital to create resilient landscapes demonstrating pollinator health, water conservation, and perennial food and forage systems. Bee Inspired Gardens have been designed at a University, middle school, charter school, Bureau of Land Management property, hotel, public park, environmental education non-profit, and more. Community members are now harvesting fruit …

Synthetic Jet Actuator-Based Aircraft Tracking Using A Continuous Robust Nonlinear Control Strategy, N. Ramos-Pedroza, W. Mackunis, M. Reyhanoglu

Publications

A robust nonlinear control law that achieves trajectory tracking control for unmanned aerial vehicles (UAVs) equipped with synthetic jet actuators (SJAs) is presented in this paper. A key challenge in the control design is that the dynamic characteristics of SJAs are nonlinear and contain parametric uncertainty. The challenge resulting from the uncertain SJA actuator parameters is mitigated via innovative algebraic manipulation in the tracking error system derivation along with a robust nonlinear control law employing constant SJA parameter estimates. A key contribution of the paper is a rigorous analysis of the range of SJA actuator parameter uncertainty within which asymptotic …

Application Of Pca To Cardiac Optical Mapping, Louis Woodhams

McKelvey School of Engineering Graduate Student Theses & Dissertations

Structural remodeling of the heart due to pathologies such as hypertension and myocardial infarction leads to the appearance of myofibroblasts, a phenotype largely absent in physiologic myocardium. While myofibroblasts are responsible for wound healing and structural repair of damaged myocardium, they are thought to have deleterious effects on electrical and mechanical properties of the heart. Understanding these effects is critical to developing effective treatments, and has motivated the development of a series of in vitro engineered heart tissues and cardiomyocyte-myofibroblast co-cultures whose mechanical and electrophysiological function can be deduced from video analysis. Electrophysiological properties are evident from changes in intensity …

"Gray Rhino" And "Black Swan" For Current China's Economy, Luo Xiaoqiang, Liang Quanqi, Yang Xiaoguang

Bulletin of Chinese Academy of Sciences (Chinese Version)

After a long period of high-speed growth and the changing of international economic condition, China is facing a severe systemic risk. China's government pays a great attention to the risk, and is engaging to prevent both "Gray Rhino" and "Black Swan". This paper tries to analyze the "Gray Rhino" and "Black Swan" for China's economy. The analysis suggests that the largest "Gray Rhino" is the fast expanding debt and the high level of lever rates, and "Black Swan" comes from the unpredicted large external impact. There are two potential factors make the "Gray Rhino" run, namely, economic slowdown and interest …

Gw170608: Observation Of A 19 Solar-Mass Binary Black Hole Coalescence, B. P. Abbott, R. Abbott, T. D. Abbott, F. Acernese, Teviet Creighton, Mario C. Diaz, Soma Mukherjee, Volker Quetschke, Malik Rakhmanov

Physics & Astronomy Faculty Publications

On 2017 June 8 at 02:01:16.49 UTC, a gravitational-wave (GW) signal from the merger of two stellar-mass blackholes was observed by the two Advanced Laser Interferometer Gravitational-Wave Observatory detectors with anetwork signal-to-noise ratio of 13. This system is the lightest black hole binary so far observed, with componentmasses of 12+7-2M⊙7+2-2 (90% credible intervals). These lie in the range of measured black hole masses inlow-mass X-ray binaries, thus allowing us to compare black holes detected through GWs with electromagneticobservations. The source's luminosity distance is 340+140-140corresponding to redshift -0.07+0.03003. We verify thatthe signal waveform is consistent with the predictions of general relativity.

Pulsar J1411+2551: A Low-Mass Double Neutron Star System, J. G. Martinez, K. Stovall, P. C.C. Freire, J. S. Deneva, T. M. Tauris, A. Ridolfi, N. Wex, Fredrick Jenet, M. A. Mclaughlin, M. Bagchi

Physics & Astronomy Faculty Publications

In this work, we report the discovery and characterization of PSR J1411+2551, a new binary pulsar discovered in the Arecibo 327 MHz Drift Pulsar Survey. Our timing observations of the radio pulsar in the system span a period of about 2.5 years. This timing campaign allowed a precise measurement of its spin period (62.4 ms) and its derivative (9.6 ±0.7) ×10 -20 s s -1 ; from these, we derive a characteristic age of >9.1 Gyr and a surface magnetic field strength of < 2.6 ×10 9 G. These numbers indicate that this pulsar was mildly recycled by accretion of matter from the progenitor of the companion star. The system has an eccentric (e =0.17) 2.61 day orbit. This eccentricity allows a highly significant measurement of the rate of advance of periastron, . Assuming general relativity accurately describes the orbital motion, this implies a total system mass M =2.538 ±0.022 M o . The minimum companion mass is 0.92 M o and the maximum pulsar mass is 1.62 M o . The large companion mass and the orbital eccentricity suggest that PSR J1411+2551 is a double neutron star system; the lightest known to date including the DNS merger GW170817. Furthermore, the relatively low orbital eccentricity and small proper motion limits suggest that the second supernova had a relatively small associated kick; this and the low system mass suggest that it was an ultra-stripped supernova.

Faculty Grievance Committee 2017-2018, Georgia Southern University

Faculty Senate: Membership Lists

No abstract provided.

Identification Of Avian Influenza Genetic Resistance Gene Marker In Chickens, R Susanti, Nur Rahayu Utami, Margareta Rahayuningsih, Fidia Fibriana

Makara Journal of Science

The Mx gene is a potential candidate as a genetic resistance marker to the avian influenza virus in chickens. The purpose of this study is to identify the potential of Mx gene as a marker of resistance to avian influenza viruses in various breeds of chicken. The study used an exploratory design using three common chicken breeds. The Kampong chicken, the Hy-Line Brown laying hen strain, and the White Leghorn broiler strain were collected from the local farms, and blood samples were drawn from each. The DNA of each sample was amplified by a pair of Mx gene primers (NE-F2/F …

The Abundance Of Nitrogen Fixing, Nitrifying, Denitrifying And Ammonifying Bacteria In The Soil Of Tropical Rainforests And Oil Palm Plantations In Jambi, Zulfarina, Iman Rusmana, Nisa Rachmania Mubarik, Dwi Andreas Santosa

Makara Journal of Science

Alterations in the use of land for oil palm plantations can change the domination and activity of soil bacteria. More specifically, alteration in soil microbial communities can directly affect soil ecosystem functioning, particularly with respect to carbon and nitrogen cycles. Nitrogen can be a limiting nutrient, and the availability of nitrogen in the soil environment becomes a major factor in controlling the production of biomass. This research project aimed at studying the abundance of nitrogen-fixing, nitrogen-oxidizing, nitrogen-reducing, and ammonifying bacteria based on their functional genes in the tropical rain forests of Taman Nasional Bukit Duabelas (TNBD) and the oil palm …

Data Integration, L Dalla Valle

School of Engineering, Computing and Mathematics

No abstract provided.

Fabrication And Characterization Of Intricate Nanostructures, Treva T. Brown

LSU New Orleans Theses and Dissertations

Encapsulation of nanoparticles within hexaniobate nanoscrolls presents interesting advances in the formation of nanocomposites exhibiting unique multi-dimensional properties. Building upon previous successes, facile yet versatile wet-chemical and microwave-irradiation synthetic protocols for the fabrication of a series of hexaniobate composites are presented herein. Solvothermal and, more recently, microwave-assisted methods have been developed that allow for the fabrication of peapod-like structures. During solvothermal treatment, exfoliated hexaniobate nanosheets scroll around highly ordered chains of preformed nanoparticles (NPs) to produce nanopeapods (NPPs). This approach offers versatility and high yields, in addition to the potential for advanced functional device fabrication.

For the characterization of these …

Neurocorrelates Of The Mirror Neuron System In Children With Chromosome 22q11.2 Deletion Syndrome, Ade Marais

LSU New Orleans Theses and Dissertations

Activation of brain regions that make up the mirror neuron system (MNS) is thought to reflect processing and perceiving behavior, action, and intentionality of other organisms. Sensing and perceiving motor behavior in others is an important component of understanding and participating in social interactions. Children with chromosome 22q11.2 deletion syndrome (22q11.2DS) are diagnosed with serious medical, cognitive, and socio-emotional symptoms. Atypical development and function of the MNS may underpin some aspects of socio-emotional impairment and autism spectrum disorder (ASD)-like symptomology reported. This study of the MNS investigates differences in activation in the operculum, sensorimotor areas, and basal ganglia (BG) in …

Hydrodynamic Controls On The Morphodynamic Evolution Of Subaqueous Landforms, Timothy L. Nelson

LSU New Orleans Theses and Dissertations

The southern Chandeleur Islands are an ideal setting to study shoal evolution given their history of submergence and re-emergence. Here, numerical models shed light on the attendant processes contributing to shoal recovery/reemergence following a destructive storm event. Simulations of a synthetic winter storm along a cross-shore profile using Xbeach shows that convergence of wave-induced sediment transport associated with repeated passage of cold-fronts initiates aggradation, but does not lead to reemergence. A Delft3d model of the entire island chain shows that as these landforms aggrade alongshore processes driven by incident wave refraction on the shoal platform, backbarrier circulation and resulting transport …

Design, Manufacture, And Structural Dynamic Analysis Of A Biomimetic Insect-Sized Wing For Micro Air Vehicles, Jose Enrique Rubio

LSU New Orleans Theses and Dissertations

The exceptional flying characteristics of airborne insects motivates the design of biomimetic wing structures that can exhibit a similar structural dynamic behavior. For this purpose, this investigation describes a method for both manufacturing a biomimetic insect-sized wing using the photolithography technique and analyzing its structural dynamic response. The geometry of a crane fly forewing (family Tipulidae) is acquired using a micro-computed tomography scanner. A computer-aided design model is generated from the measurements of the reconstructed scanned model of the insect wing to design the photomasks of the membrane and the venation network required for the photolithography procedure. A composite …

Environmental Durability And Degradation Of Fiber-Reinforced Bismaleimide/Quartz Composite For Aircraft Radome Applications, Luis A. Rodriguez

Open Access Dissertations

Bismaleimide (BMI) is a polymeric thermoset material that is suitable for high temperature structural and electrical applications, particularly when used as a matrix in fiber-reinforced composites for radar-protecting structures (radomes) on commercial and military aircraft. In this role, BMI’s high service temperature and high strength-to-weight ratio are of significant importance in supersonic aircraft. A main disadvantage of this material is the propensity to absorb environmental and aircraft related fluids in many applications, even in hot, dry environments. Moisture absorption has been known to be a deleterious factor in the service life of aircraft structures, especially in the case of dielectric …

Anomalous Structures In Oceanic Turbulence: Dynamics, Energetics, Transport, Mykhailo Rudko

Open Access Dissertations

In this thesis, anomalous structures of oceanic mesoscale turbulence, as exemplified by coherent vortices and zonally-elongated transient flows (ZELTs), are considered. All simulations of mesoscale turbulence flows are performed in a two-layer, quasi-geostrophic model. The first chapter explores stability of and transport by baroclinic vortices on the β-plane. The study adapts a wave-mean flow formalism and examines interactions between the axisymmetric flow (“the vortex”) and residuals (“the waves”). Unlike baroclinically unstable vortices on the f-plane, such vortices on the β-plane can be also vulnerable to barotropic instability as revealed by the globally integrated energy balance analysis. The spatial structure of …

The Role Of Carbon Capture And Storage Electricity In Attaining 1.5 And 2°C, Adriano Vinca, Marianna Rottoli, Giacomo Marangoni, Massimo Tavoni

Fondazione Eni Enrico Mattei Working Papers

The climate targets defined under the Paris agreement of limiting global temperature increase below 1.5 or 2°C require massive deployment of low-carbon options in the energy mix, which is currently dominated by fossil fuels. Scenarios suggest that Carbon Capture and Storage (CCS) might play a central role in this transformation, but CCS deployment is stagnating and doubts remain about its techno-economic feasibility. In this article, we carry out a throughout assessment of the role of CCS electricity for a variety of temperature targets, from 1.5 to above 4°C, with particular attention to the lower end of this range. We collect …

Preparing Today’S Middle School Science Students For The Real World Of Science Through Relevant And Inquiry-Based Activities, Hannah F. Walsh

Honors Program Theses and Projects

During the past several decades we have seen an increase in the demand for individuals trained in STEM (science, technology, engineering and mathematics) disciplines (Rothwell, 2013). While this is this case, according to the Bureau of Labor, the United States will see a shortage of STEM workers over the next decade, with the demand for highly trained STEM workers exceeding the minimal supply (Rothwell, 2013). In a study of bachelor and associate students in the academic year of 2003 and 2004, only 28% of bachelor students and 20% of associate students entered STEM fields (Chen & Soldner, 2013). This study …

Redesign Of The Bridgewater State University Website, Jordan Rossetti

Honors Program Theses and Projects

In this thesis, I studied human-computer interaction (HCI), analyzed the usability of the Bridgewater State University website, and redesigned it guided by HCI principles and user experiments. A goal of the project is to apply suggestions from HCI research to the usability analysis of an existing website. I redesigned the website based on this analysis and by conducting user experiments compare the redesign against the existing BSU website. With this project, I redesigned a website that demonstrably improves users’ success at information seeking and navigation while reducing frustration and hassle compared to the current Bridgewater State University (BSU) website. This …

2017 Fall Engr333 Project Final Report (Section A), Trevor Nyeholt, Francis Kapesa, Justin Thalmayer, Erik Karlson, Kyle Van Veen, Kirk Brink, Steven Tarske, Brent Homan, Nathan De Haan, Paul Bootsma, Megan Anders, Philip Holmes, Melanie Fox, Noah Pirrotta, Abigail Berkompas, Ben Wellman, Halley Press, Christopher Greaves, Josh Templeman, Tim Bosch, Jake Zandstra, Hendrik Vermeulen

ENGR 333

Calvin College currently spends $836,000 annually on natural gas consumption. The engineering 333-A class was tasked with the question, "What would it take for Calvin College to save $75,000 per year on natural gas costs". The class was split into five groups (Boilers, Dorms and Dining Hall, Academic Buildings, Finance, and PE Complex) to research possible areas of savings. Through the class' research, it was determined that Calvin College has the potential savings of $87,000 a year through the reduction of natural gas usage.

Changes In Enzyme Structural Dynamics Studied By Hydrogen Exchange-Mass Spectrometry: Ligand Binding Effects Or Catalytically Relevant Motions?, Courtney S Fast, Siavash Vahidi, Lars Konermann

Chemistry Publications

It is believed that enzyme catalysis is facilitated by conformational dynamics of the protein scaffold that surrounds the active site, yet the exact nature of catalytically relevant protein motions remains largely unknown. Hydrogen/deuterium exchange (HDX) mass spectrometry (MS) reports on backbone H-bond fluctuations. HDX/MS thus represents a promising avenue for probing the relationship between enzyme dynamics and catalysis. A seemingly straightforward strategy for such studies involves comparative measurements during substrate turnover and in the resting state. We examined the feasibility of this approach using rabbit muscle pyruvate kinase (rM1-PK) which catalyzes the conversion of phosphoenolpyruvate and Mg-ADP to pyruvate and …

2017 Fall Engr333 Project Final Report (Section B), Eric Ball, Mitchell Debruin, Raymond Kolocek, Edwin Kpodzro, Jacob Vandekieft, Nate Anderson, Brennan Steenhoek, Darbi Meyer, Derek Vermerris, Jessica Bouma, Devon Loerop, Reuben Saarloos, Richmond Amoh, Matthew Boelens, Tyson Butler, Laura Van Winkle, Alex Keizer, Kwame Ohemeng, Cameron Richman, Julie Van De Riet

ENGR 333

Currently, Calvin College spends $2.8M on electricity and natural gas. In the recent past Calvin has alleviated some of these costs by running a cogeneration system that combusts fuel and produces electricity and heat, this old system has since been removed due to age. With the old system removed Calvin is fully reliant on grid, leading to increased electricity cost. In addition to saving Calvin money, President Leroy formally signed the President’s Carbon Commitment that announced Calvin’s intent to be Carbon neutral by 2057. To meet both the cost and emissions saving needs, the objective of the energy savings project …

Developing A Virtual Reality Android Application To Remote Explore A Room, Jamie Nelson

Honors Program Theses and Projects

Virtual reality is a rapidly growing area of research. Many scholars are emphasizing its importance and creators are designing cheaper equipment to acquire it. The purpose of this research was to create a simple virtual reality mobile application that allows the user to explore a room. For this thesis, we created a robot and, with the help from a fellow researcher, we optimized the robot for this specific task. We programed the robot to move forward in small increments and to spin a platform holding a Go Pro camera. The camera sends a live stream video to an Android mobile …

A Developmental Study On Assessing The Cybersecurity Competency Of Organizational Information System Users, Richard K. Nilsen, Yair Levy, Steven R. Terrell Ph.D., Dawn Beyer

Journal of Cybersecurity Education, Research and Practice

Organizational information system users (OISUs) that are open to cyber threats vectors are contributing to major financial and information losses for individuals, businesses, and governments. Moreover, technical cybersecurity controls may be rendered useless due to a lack of cybersecurity competency of OISUs. The main goal of this research study was to propose and validate, using subject matter experts (SMEs), a reliable hands-on assessment prototype tool for measuring the knowledge, skills, and abilities (KSAs) that comprise the cybersecurity competency of an OISU. Primarily using the Delphi methodology, this study implemented four phases of data collection using cybersecurity SMEs for proposing and …

A Toolkit Approach To Information Security Awareness And Education, Peter Korovessis, Steven Furnell, Maria Papadaki, Paul Haskell-Dowland

Journal of Cybersecurity Education, Research and Practice

In today’s business environment where all operations are enabled by technology, information security has become an established discipline as more and more businesses realize its value. The human component has been recognized to have an important role in information security since the only way to reduce security risks is through making employees more information security aware. Towards this goal the research will appreciate the importance of information security awareness by illustrating the need for more effective user training. Further to that it proposes and develops an information security toolkit as a prototype awareness raising initiative. Apart from the elements of …

From The Editors, Herbert J. Mattord, Michael E. Whitman, Carole L. Hollingsworth

Journal of Cybersecurity Education, Research and Practice

No abstract provided.

Social Media Risk Perceptions Of Human Resource Professionals: Issues Undergraduate Students Should Consider, Julio C. Rivera, Jack Howard, Samuel Goh, James L. Worrell, Paul Di Gangi

Journal of Cybersecurity Education, Research and Practice

This study contrasts the social media risk perceptions of undergraduate students, versus those of certified Human Resource professionals. Social media is widely used by most segments of the population, and particularly among the age group that includes most undergraduate students. Organizations hiring employees are increasingly examining job applicant's social media postings as part of the applicant screening process. In this study we examine how these groups differ in their perceptions of the risks inherent in using social media, and what these differences may mean for students seeking employment. Recommendations are made for raising undergraduate student awareness of these risks.

Synergistic Security: A Work System Case Study Of The Target Breach, Martha Nanette Harrell

Journal of Cybersecurity Education, Research and Practice

Recent publicized security breaches can be used to evaluate information security programs. The processes and procedures that allowed the event to occur can be examined in a case study and then be used to find methods for future mitigation of risk. The Target security breach is used in this study to examine the organization’s information security program using a macro-ergonomic model. This research posits that an information security program should consider the work system design, based in macro-ergonomics, to help mitigate information security risk to the organization and ensure an efficient and effective information security program. Based on a seminal …