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Preparation Of Fe$_{3}$O$_{4}$ @ Montmorillonite Composite As An Effective Sorbent For The Removal Of Lead And Cadmium From Wastewater Samples, Hande Tinas, Ece Çalişkan, Ni̇l Özbek, Süleyman Akman

Turkish Journal of Chemistry

A magnetic Fe$_{3}$O$_{4}$ @ montmorillonite composite was prepared and used for the separation of lead and cadmium from aqueous solutions. For this purpose, magnetite (Fe$_{3}$O$_{4})$ was generated by co-precipitation of FeSO$_{4}$ and FeCl$_{3}$ onto montmorillonite. The effects of various experimental parameters such as pH of the solution, amount of sorbent, initial concentration of analytes, and contact time on the sorption efficiencies of lead and cadmium ions were investigated and optimized by applying a batch technique. The concentrations of analytes were determined by high resolution continuum source flame atomic absorption spectrometry. The maximum adsorption occurred at pH 2.0. The adsorption capacity …

A Simple And Efficient Approach For Preconcentration Of Some Heavy Metals In Cosmetic Products Before Their Determinations By Flame Atomic Absorption Spectrometry, Nai̇l Altunay, Ramazan Gürkan

Turkish Journal of Chemistry

In the current study, a simple and efficient analytical method for preconcentration and determination of Cd(II), Pb(II), and Sn(II) in some cosmetic samples, using ultrasonic assisted-cloud point extraction and flame atomic absorption spectrometry, was developed. The method is based on the ternary complex formations of Sn(II), Pb(II), and Cd(II), which are available in the form of neutral and/or anionic hydroxo complexes (Sn(OH)$_{3}^{-}$, Pb(OH)$_{3}^{-}$, Cd(OH)$_{2}$, and/or Cd(OH)$_{3}^{-})$, with Victoria Pure Blue BO (VPB$^{+})$ in the presence of cetylpyridinium chloride at pH 8.5, and then extraction of the formed ternary complexes into the micellar phase of polyoxyethylene sorbitan monostearate (Tween 60). Using …

Analytical Capabilities Of Two-Phase Hollow-Fiber Liquid Phase Microextraction For Trace Multielement Determination In Aqueous Samples By Means Of Portable Total Reflection X-Ray Instrumentation, Eva Margui, Manuela Hidalgo

Turkish Journal of Chemistry

Liquid phase microextraction (LPME) procedures have been widely used in combination with atomic and emission spectroscopic techniques for the isolation and preconcentration of trace elements. However, its application in combination with total reflection X-ray spectrometry (TXRF) is still scarce. In this paper, we evaluate the possibilities and drawbacks of a two-phase hollow fiber LPME procedure in combination with TXRF for the simultaneous determination of trace amounts of Cr, Ni, Cu, Zn, Pb, and Cd in aqueous samples. After extraction of the analytes by using the optimum conditions (sample volume: 25 mL, complexing agent: APDC, organic solvent: hexylbenzene, extraction time: 2 …

Separation And Preconcentration Of Pb(Ii) And Cu(Ii) Ions Via Carrier Element-Free Coprecipitation Using An Acetohydrazide Derivative, Süreyya Oğuz Tümay, Murat Yazar, Duygu Özdeş, Hakan Bektaş, Celal Duran

Turkish Journal of Chemistry

A new method based on the combination of carrier element-free coprecipitation and flame atomic absorption spectrometric determination has been investigated for simultaneous separation and preconcentration of Pb(II) and Cu(II) ions in some environmental solid and liquid samples. The 2-{3-(4-methylbenzyl)-4-[2-(1H-indol-3-yl)ethyl]-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl} -N'-(phenylmethylene) acetohydrazide (MITA) was utilized as an organic coprecipitating agent without using a carrier element for coprecipitation of the analyte ions. The effects of experimental conditions including aqueous solution pH, MITA quantity, sample volume, standing time, and centrifugation rate and time were investigated in detail and optimized. The influences of some foreign ions were also evaluated on the quantitative recoveries of …

Solidified Floating Organic Drop Microextraction For Speciation Of Se (Iv) And Se (Vi) In Water Samples Prior To Electrothermal Atomic Absorption Spectrometric Detection, Demi̇rhan Çitak, Mustafa Tüzen

Turkish Journal of Chemistry

A simple and fast solidified floating organic drop microextraction (SFODME) method is suggested for the speciation of Se (IV) and Se (VI) in water samples prior to electrothermal atomic absorption spectrometric (ETAAS) detection. For that purpose, 1-phenylthiosemicarbazide (PTC) was used as chelating agent and undecanol was used as extraction solvent. The pH of solution, extraction solvent volume, amount of ligand, effect of time for complex formation, and effect of possible foreign ions were also evaluated for quantitative and effective extraction of analyte. Under optimized parameters, detection limit (0.19 $\mu $g L$^{-1})$, limit of quantification (0.60 $\mu $g L$^{-1})$, relative standard …

Biosorption Potential Of Surface-Modified Waste Sugar Beet Pulp For The Removal Of Reactive Yellow 2 (Ry2) Anionic Dye, Si̇bel Tunali Akar, Sema Çeli̇k, Di̇lek Tunç, Yasemi̇n Yeti̇moğlu Balk, Tamer Akar

Turkish Journal of Chemistry

Tetra-$n$-butylammonium bromide modified sugar beet pulp (TBAB-SBP) with good biosorption and regeneration potential was prepared for removal of dye from contaminated solutions. The decolorization performance of TBAB-SBP was investigated using Reactive Yellow 2 (RY2) as a model dye. The characterization of the modified biosorbent was investigated by IR, SEM, zeta potential, and BET surface area analysis to discuss the decolorization mechanism. The effects of initial pH, biosorbent amount, contact time, dye concentration, and flow rate on the treatment process were examined. The experimental kinetic data were well predicted by the pseudo-second-order kinetic model and Langmuir isotherm with a maximum monolayer …

Synthesis And Photochromism Of New Asymmetrical Diarylethenes With A Variable Heteroaryl Ring And A Quinoline Unit, Hongyan Xu, Renjie Wang, Congbin Fan, Gang Liu, Shouzhi Pu

Turkish Journal of Chemistry

Three new asymmetrical photochromic diarylethenes containing a variable heteroaryl ring and a quinoline unit were synthesized and their structures were determined by single-crystal X-ray diffraction analysis. Their properties, including photochromism, acidichromism, and fluorescence, were investigated systematically. For these diarylethenes, the one with an indole moiety had the largest absorption maximum, cyclization quantum yield, photoconversion ratio, emission peak, and fluorescent modulation efficiency. In addition, these diarylethenes exhibited an evident dual switching behavior induced by the stimulation of acid/base and UV/Vis. Addition of trifluoroacetic acid to solution of the diarylethenes produced protonated derivatives with notable changes in their absorption spectra. These results …

Kicm: A Knowledge-Intensive Context Model, Fredrick Mtenzi, Denis Lupiana

Conference papers

A context model plays a significant role in developing context-aware architectures and consequently on realizing context-awareness, which is important in today's dynamic computing environments. These architectures monitor and analyse their environments to enable context-aware applications to effortlessly and appropriately respond to users' computing needs. These applications make the use of computing devices intuitive and less intrusive. A context model is an abstract and simplified representation of the real world, where the users and their computing devices interact. It is through a context model that knowledge about the real world can be represented in and reasoned by a context-aware architecture. This …

Women In Science 2016, Clark Science Center's Summer Research Fellows Program

SURF Abstracts (Women in Science)

Women in Science 2016 summarizes research done by Smith College’s Summer Research Fellowship (SURF) Program participants. Ever since its 1967 start, SURF has been a cornerstone of Smith’s science education. In 2016, 150 students participated in SURF (144 hosted on campus and nearby eld sites), supervised by 56 faculty mentor-advisors drawn from the Clark Science Center and connected to its eighteen science, mathematics, and engineering departments and programs and associated centers and units. At summer’s end, SURF participants were asked to summarize their research experiences for this publication.

Identifying The Potential Environmental Impacts Of Engineered Nanomaterials, Therese Garvey

Theses

Engineered Nanomaterials (ENMs) are increasingly manufactured and incorporated into a diverse array of consumer products and industrial uses. While ENMs are touted for their technological and efficiency benefits, the potential impacts of increasing emissions and exposures to ENMs are poorly understood. This dissertation takes a critical look at the current knowledge in impact assessment of nanomaterials. First, the current metrics for impact assessment of traditional methods are compared with the proposed set of metrics necessary for nanomaterial impact assessment. Next, in order to understand the potential environmental impacts in context, characterization factors for four case study nanomaterials are modeled using …

Ipo Firms' Voluntary Compliance With Sox 404 As Evidence On The Value Relevance Of Internal Control Quality, Qianyun Huang, Kimberly Gleason, Leonard Rosenthal, Deborah Smith

Business Faculty Publications

Newly public firms are not required to comply with SOX 404 for their initial public offerings. This provides a unique setting in which to investigate the benefits of voluntary disclosure with SOX 404 and the value of information revealed as a consequence of compliance. We investigate whether voluntary compliance with SOX 404, either fully or partially, impacts the perceived risk of firms conducting IPOs on the first day of trading (reflected in underpricing) or following the IPO. Our results indicate that neither full compliance with SOX 404 at the time of the IPO, nor a managerial discussion of internal controls …

Effects Of Temperature, Irradiance And Pco2 On The Growth And Nitrogen Utilization Of Prorocentrum Donghaiense, Zhangxi Hu, Margaret R. Mulholland, Ning Xu, Shunshan Duan

OES Faculty Publications

Environmental factors such as temp erature, irradiance, and nitrogen (N) supply affect the growth of Prorocentrum donghaiense, but the interactive effects of these physical factors and the effects of atmospheric CO₂ (pCO₂) on growth and N uptake have not been examined. We compared growth kinetics of P. donghaiense grown on 4 different N substrates (nitrate [NO₃ -], ammonium [NH₄ +], urea, and glutamic acid [glu]) with respect to temperature, irradiance, and pCO₂. Temperature (15 to 30°C) had a positive effect on growth (max. growth rates: 0.17 to 0.65 d …

The Muzzled Hope: Utilizing Black Protest Thought To Examine African American Males' Identity Development And Academic Success In The Rural U.S. South, Latoya D. Jenkins

College of Graduate Studies: Theses & Dissertations

The problems faced by African American males in the United States is often the result of misconstrued images and stereotypes that present this segment of the population in a distasteful manner. If one chimes in to various circuits of popular culture, glances over the latest headlines of newspapers, and/or listens to the confluent lyrics of hip hop that, eloquently, bridges life struggles with melodic hooks to expose the oppression faced by people of color, one thing becomes apparent: Social progression is dependent upon society’s ability to magnify, listen to, and incorporate the voices of marginalized groups.

With the majority of …

Team Training In Safety And Security Via Simulation : A Practical Dimension Of Maritime Education And Training, Michael Baldauf, Dimitrios Dalaklis, Aditi Kataria

Conference Papers

In the rather extended maritime domain, a term that should be the epicentre of any successful careerbuilding path is tailor-made training via cutting-edge simulators. To cut a long story short, the breadth of operations on the various types of ships has expanded to such a large extent that extensive practical training drills are becoming a compelling need to contribute to competent seafarers. This type of training can guarantee the positive outcome in their decision-making process and help the seafarers often being under continuous pressure, to suitably respond to the various safety and security threats on-board a vessel. The several conventions …

2015-2016 Georgia Southern University Basketball Media Guide, Georgia Southern University

Men's Basketball Records

• 2015-2016 Media Guide Men's Basketball

Local Health Departments’ Activities To Address Health Disparities And Inequities: Are We Moving In The Right Direction?, Gulzar H. Shah, John P. Sheahan

Health Policy & Management: Faculty Publications (2006-2018)

Context: Health disparities are among the critical public health challenges.

Objectives: To analyze the extent to which local health departments (LHDs) perform activities for addressing health disparities, changes in proportion of LHDs’ performing those activities since 2005, and factors associated with variation in such engagement.

Methods: We used the 2013 National Profile of LHDs Survey to perform Logistic Regression of activities LHDs performed to address health disparities.

Results: About 20 percent of LHDs did not perform any activity to address health disparities. Significant decreases occurred since 2005 in the proportion of LHDs that performed health disparity reduction/elimination activities for four …

Ultra-Thin Film Near Perfect Light Absorbers And Transmission Filters In Visible And Ultraviolet Spectrum, Omar Alzain

Theses

Two layer structures have been investigated for absorbing light in the ultraviolet (UV) spectral range from 200 nm to 400 nm. A narrow-band near perfect light absorber is demonstrated which is composed of ultra-thin metal-dielectric-metal films. The absorber is designed and fabricated in the visible frequency region from 400 nm to 700 nm wavelength. By tuning the cavity layer thickness, spectral selective near perfect light absorption was achieved. In a additional narrow band transmission filter is designed and fabricated at the visible range using four-layer structures.

The Theory Of Planned Behavior As Applied To Helmet Use In Equestrians, Kelly L. Arnold

Theses

The theory of planned behavior is a model wherein beliefs give rise to intention which results in action. We tested it by separating equestrians into helmet users and non-users then presented framed health messages manipulated in a 2 (Helmet: Present, Absent) x 2 (Valence: Positive, Negative) x 2 (Icon: Circle, Rosette) between subjects design. We measured equestrians' intent to use a helmet after viewing a short horse-accident video and found that helmet non-users were most responsive to positively framed messages focusing on helmet use instead of non-use. Reasons for helmet non-use in equestrians as well as information on head injuries …

This Is Rocket City, U.S.A., Let Freedom Begin Here : A Museum Exhibit On The Civil Rights Movement In Huntsville, Alabama, Kelly Fisk Hamlin

Theses

Huntsville, Alabama saw dramatic changes throughout the 1950s and 1960s with the development of a federal military installation and NASA space center within its city limits, bringing millions of federal dollars and tens of thousands of highly educated residents to the northern Alabama city. This growth set the stage for a highly motivated group of grassroots civil rights organizers whose persistence would make Huntsville the first in the state of Alabama to integrate its public facilities, businesses, public schools, and universities. Despite the hardships inherent to civil rights activism in Governor George Wallace’s Alabama, the locally-organized Community Service Committee targeted …

Heat Deposition During Turbulence Distorted Laser Irradiation, William Vaden Dent Iii

Theses

Realistically modeled heat deposition by a laser source under a variety of turbulent conditions generated from the classic Kolmogorov model is presented. Predicted heat deposition data is created from solutions to the differential heat flow equation and for representative example turbulence distorted waveforms.

Demo: Profiling Power Utilization Behaviours Of Smartwatch Applications, Joseph Joo Keng Chan, Lingxiao Jiang, Rajesh Krishna Balan, Youngki Lee, Archan Misra

Research Collection School Of Computing and Information Systems

Smartwatches complement the main mobile phone and are able to profile user-activity as well as provide links, updates and notifications with work or personal utilities (e.g. Email, Social Media, Messaging etc.). Although very promising, smartwatches are still limited by low battery life. This is due to the small size of the battery as well as the need to continuously perform sensing. Battery drain issues by apps as well as the system are a common complaint by users. Improved tools for power analysis and profiling of smartwatch apps can help both developers (by providing a platform for pre-release analysis) and users …

On Analyzing Geotagged Tweets For Location-Based Patterns, Philips Kokoh Prasetyo, Palakorn Achananuparp, Ee Peng Lim

Research Collection School Of Computing and Information Systems

Geotagged social media is becoming highly popular as social media access is now made very easy through a wide range of mobile apps which automatically detect and augment social media posts with geo-locations. In this paper, we analyze two kinds of location-based patterns. The first is the association between location attributes and the locations of user tweets. The second is location association pattern which comprises a pair of locations that are co-visited by users. We demonstrate that through tracking the Twitter data of Singapore-based users, we are able to reveal association between users tweeting from school locations and the school …

Data Analytics On Consumer Behavior In Omni-Channel Retail Banking, Card And Payment Services, Geng Dan

Research Collection School Of Computing and Information Systems

Innovations in financial services have created challenges for banks that Information Systems (IS) research can address. My interests involve transaction cost theory, substitution and complementarity theory, and consumer informedness theory to understand consumer behavior and firm performance in the omni-channel world of digital banking. At a high level, my research inquiry asks: How can financial institutions take advantage of the deep insights that data analytics and management science modeling create on consumer behavior and channel management decision-making? And how can changes in payments and services in retail banking be understood in spatial and temporal terms? I am working on three …

The Pursuit Of Information Sharing: Expressing Task Conflicts As Debates Vs. Disagreements Increases Perceived Receptivity To Dissenting Opinions In Groups, Ming-Hong Tsai, Corinne Bendersky

Research Collection School of Social Sciences

Group members often over-weigh shared information and under-value unique information during discussions to the detriment of decision quality. Fortunately, perceiving other group members as receptive to dissenting opinions may enhance information sharing. We distinguish between two ways of expressing opinion-differences about tasks-debates and disagreements-that we predict are perceived by others as conveying varying degrees of receptivity to dissenting opinions. In four studies with mixed methods and a causal chain design, we manipulate and measure group members' (the "senders") expressions of debates and disagreements, others' (the "receivers") perceptions of the senders' receptivity to dissenting opinions, and receivers' information sharing intentions and …

Ideas, Interests And Practical Authority In Reform Politics: Decentralization Reform In South Korea In The 2000s, Yooil Bae

Research Collection School of Social Sciences

This paper explains the reason why the hitherto statist country, Korea, has carried out significant decentralization since the 2000s. In explaining the motivation for decentralization, extant literature has focused on the role of parties, bureaucratic politics, democratization, or territorial interests. Yet there is still limited explanation of how the decentralization laws in Korea could be successfully passed in the 2000s, while cental stakeholders still persisted. By tracing the process of decentralization reform in the 2000s, this article demonstrates how structural factors created favourable circumstances and discursive background for institutional change, and how the idea of decentralization, through the idea diffusion …

Piling On: The Rise Of Sanctions Cooperation Between Regional Organizations, The United States, And The Eu, Inken Von Borzyskowski, Clar Portela

Research Collection School of Social Sciences

Of all the countries identified as rising powers on the world stage, Brazil appears to have drawn considerable economic and political strength from its engagement with various forms of regionalism during the expansionist years when Lula was president. Whether by helping create a local, intra-regional entity (Mercosul) or, later, proposing a continental one (UNASUL), Brasilia appeared to have the capacity to further its own economic and political interests by generating cooperative interactions with its smaller neighbors. Subsequently it took a leading role in inter-regional negotiations between Mercosul and the European Union in the global North and between Mercosul and ASEAN …

Analyzing The Analysts: The Effect Of Technical And Social Skills On Analyst Career, Congcong Li, An-Ping Lin, Hai Lu

Research Collection School Of Accountancy

This paper investigates how technical and social skills of financial analysts affect theirperformance and career advancement. Using a sample of LinkedIn profiles of financial analysts,we document that analysts with good social skill, proxied by the number of social connections,generate more accurate earnings forecasts and produce more informative stock recommendations.These analysts are also more likely to be voted as All-Star analysts and to move to high-statusbrokers when changing jobs. However, the effect of technical skills, proxied by the quantitativeskills disclosed on LinkedIn, only affect earnings forecast accuracy. The analysts with technicalskills are indifferent in the likelihood of being voted as star …

Curriculum Studies Summer Collaborative Program [2016], Curriculum Studies Summer Collaborative

Curriculum Studies Summer Collaborative (2011-2025)

Not available.

2016 Spring Commencement, Georgia Southern University

Commencement Programs

No abstract provided.

Sociology Of Mass Media Syllabus, Brandon Bosch

Department of Sociology: Faculty Publications

This class will focus on mass media representations of gender, race, class, and politics, as well as the cultural, legal, economic, and institutional factors influencing the production of media texts. We will also discuss the ways in which media audiences (not just media scholars) make sense of media texts. Types of media to be discussed include advertisements, film (including romantic comedies, drama, horror, action, and war films), news media, comic books, video games, “reality” television, and sitcoms. Due to time constraints, popular music, novels, and “new” media will receive relatively less attention. Much of the class will focus on classic …