Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2016

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 34501 - 34530 of 36010

Full-Text Articles in Entire DC Network

Transverse Energy Production And Charged-Particle Multiplicity At Midrapidity In Various Systems From √Snn =7.7 To 200 Gev, Andrew Marshall Adare, Gyöngyi Baksay, László A. Baksay, Klaus Dehmelt, Marcus Hohlmann, S. Rembeczki Jan 2016

Transverse Energy Production And Charged-Particle Multiplicity At Midrapidity In Various Systems From √Snn =7.7 To 200 Gev, Andrew Marshall Adare, Gyöngyi Baksay, László A. Baksay, Klaus Dehmelt, Marcus Hohlmann, S. Rembeczki

Aerospace, Physics, and Space Science Faculty Publications

Measurements of midrapidity charged-particle multiplicity distributions, dNch/dη, and midrapidity transverse-energy distributions, dET/dη, are presented for a variety of collision systems and energies. Included are distributions for Au+Au collisions at sNN=200, 130, 62.4, 39, 27, 19.6, 14.5, and 7.7 GeV, Cu+Cu collisions at √sNN=200 and 62.4 GeV, Cu+Au collisions at √sNN=200 GeV, U+U collisions at √sNN=193 GeV, d+Au collisions at √sNN=200 GeV, ³He+Au collisions at √sNN=200 GeV, and p+p collisions at √sNN=200 GeV. Centrality-dependent distributions at midrapidity are presented in terms of the number of nucleon participants, Npart, and the number of constituent quark participants, Nqp. For all A+A collisions down …

Go to article

Measurement Of The Higher-Order Anisotropic Flow Coefficients For Identified Hadrons In Au + Au Collisions At √Snn =200 Gev, Andrew Marshall Adare, Baksay Gyöngyi, Baksay A. László, Marcus Hohlmann, Phenix Collaboration Jan 2016

Measurement Of The Higher-Order Anisotropic Flow Coefficients For Identified Hadrons In Au + Au Collisions At √Snn =200 Gev, Andrew Marshall Adare, Baksay Gyöngyi, Baksay A. László, Marcus Hohlmann, Phenix Collaboration

Aerospace, Physics, and Space Science Faculty Publications

Measurements of the anisotropic flow coefficients v₂{Ψ₂}, v₃{Ψ₃}, v₄{Ψ₄}, and v₄{Ψ₂} for identified particles (π±,K±, and p+p⁻) at midrapidity, obtained relative to the event planes Ψm at forward rapidities in Au + Au collisions at √sNN=200GeV, are presented as a function of collision centrality and particle transverse momenta pT. The vn coefficients show characteristic patterns consistent with hydrodynamical expansion of the matter produced in the collisions. For each harmonic n, a modified valence quark-number Nq scaling [plotting vn{Ψm}/(Nq)n/2 versus transverse kinetic energies (KET)/Nq] is observed to yield a single curve for all the measured particle species for a broad range …

Go to article

Azimuthally Anisotropic Emission Of Low-Momentum Direct Photons In Au + Au Collisions At √Snn =200 Gev, Andrew Marshall Adare, Baksay Gyöngyi, Baksay A. László, Klaus Dehmelt, Marcus Hohlmann, Phenix Collaboration Jan 2016

Azimuthally Anisotropic Emission Of Low-Momentum Direct Photons In Au + Au Collisions At √Snn =200 Gev, Andrew Marshall Adare, Baksay Gyöngyi, Baksay A. László, Klaus Dehmelt, Marcus Hohlmann, Phenix Collaboration

Aerospace, Physics, and Space Science Faculty Publications

The PHENIX experiment at the BNL Relativistic Heavy Ion Collider has measured second- and third-order Fourier coefficients of the azimuthal distributions of direct photons emitted at midrapidity in Au+Au collisions at √sNN=200 GeV for various collision centralities. Combining two different analysis techniques, results were obtained in the transverse momentum range of 0.4

Go to article

Modification Of The Lower Ionospheric Conductivity By Thunderstorm Electrostatic Fields, Mohammad A. Salem, Ningyu Liu, Hamid K. Rassoul Jan 2016

Modification Of The Lower Ionospheric Conductivity By Thunderstorm Electrostatic Fields, Mohammad A. Salem, Ningyu Liu, Hamid K. Rassoul

Aerospace, Physics, and Space Science Faculty Publications

This paper reports a modeling study of the modifications of the nighttime lower ionospheric conductivity by electrostatic fields produced by underlying thunderstorms. The model used combines Ohm's law with a simplified lower ionospheric ion chemistry model to self-consistently calculate the steady state nighttime conductivity above a thunderstorm. The results indicate that although the electron density is generally increased, the lower ionospheric conductivity can be reduced by up to 1-2 orders of magnitude because electron mobility is significantly reduced due to the electron heating effect. For a typical ionospheric density profile, the resulting changes in the reflection heights of extremely low …

Go to article

Officer Accountability, Megan Wischmeier Shaner Jan 2016

Officer Accountability, Megan Wischmeier Shaner

Faculty Articles

The officer is at the center of modern corporate governance. Wielding immense power and influence, officers’ conduct and decision-making can determine the success or failure of their companies and impact the economy more broadly. Fiduciary duties under state law serve as a vital check on officer power. This article is the third piece in a study of the role of fiduciary duties in regulating officer behavior. It examines an underlying premise in prior scholarship – that officers are rarely being held accountable for their conduct in the traditional fiduciary duty litigation context of state court. This article reviews opinions of …

Go to article

The Effect Of Trinexapac-Ethyl And Seeding Rate On Rice Milling Yields, İsmai̇l Sezer, Rasi̇m Ünan, Mevlüt Şahi̇n, Michael Orrin Way Jan 2016

The Effect Of Trinexapac-Ethyl And Seeding Rate On Rice Milling Yields, İsmai̇l Sezer, Rasi̇m Ünan, Mevlüt Şahi̇n, Michael Orrin Way

Turkish Journal of Agriculture and Forestry

The effects of the plant growth regulator trinexapac-ethyl (TE), conjoined with different seeding rates of rice (Oryza sativa L.) milling yields, were evaluated in Turkey between 2009 and 2010. Two rice cultivars (Osmancık-97 and Karadeniz), three seeding rates (400, 500, and 600 seeds m-2), and four doses of TE (0, 100, 200, and 300 g ai ha-1) were compared. The experiments were designed in a randomized block in factorial ordering with 3 replicates. Quality factors including head, cargo, and total rice milling yields, 1000 grain weight, and lodging score were evaluated. Head rice milling yield was affected significantly; however, no …

Go to article

Correlation Between Browning Degree And Composition Of Importantturkish White Wine Grape Varieties, Mustafa Ümi̇t Ünal, Aysun Şener Jan 2016

Correlation Between Browning Degree And Composition Of Importantturkish White Wine Grape Varieties, Mustafa Ümi̇t Ünal, Aysun Şener

Turkish Journal of Agriculture and Forestry

This study was undertaken to investigate the correlation between browning degree and composition of important Turkish white wine grape varieties during the 2006 and 2007 seasons. Large seasonal and cultivar variations were found in all measured variables. The highest browning degree was found in the Narince cultivar in both years, followed by Emir and Sultaniye, with Narince being the most susceptible to browning and Sultaniye being the least. No correlation (P < 0.05) was found between browning degrees and cysteine, glutathione, polyphenol oxidase activity, or total phenolic contents. Effects of harvest year and variety on all measured parameters, except total phenolics, were statistically significant (P < 0.01).

Go to article

Characterization Of Some Bioactive Compounds And Physicochemical Propertiesof Grape Varieties Grown In Turkey: Thermal Degradation Kinetics Of Anthocyanin, Sali̇h Karasu, Mehmet Başlar, Safa Karaman, Mahmut Kiliçli, Ahmet Abdullah Us, Hasan Yaman, Osman Sağdiç Jan 2016

Characterization Of Some Bioactive Compounds And Physicochemical Propertiesof Grape Varieties Grown In Turkey: Thermal Degradation Kinetics Of Anthocyanin, Sali̇h Karasu, Mehmet Başlar, Safa Karaman, Mahmut Kiliçli, Ahmet Abdullah Us, Hasan Yaman, Osman Sağdiç

Turkish Journal of Agriculture and Forestry

In the present study, five different grapes varieties grown in Turkey were comprehensively characterized in terms of physicochemical properties, total bioactive content, antiradical activity, and volatile sugar compounds. Thermal degradation kinetics of anthocyanin in the selected grape varieties were also analyzed. All the bioactive compounds and antiradical activity varied depending on variety and grape part (skin, pulp, or seed). Higher amounts of total phenolics, total flavonoids, anthocyanin, and antiradical capacity were obtained from seeds. Fifty-nine volatile compounds were observed in the grape varieties. Terpenoid compounds were determined to be the predominant aroma compounds, of which limonene and citral had the …

Go to article

A Modeling Study With An Artificial Neural Network: Developing Estimationmodels For The Tomato Plant Leaf Area, Hande Küçükönder, Sedat Boyaci, Adi̇l Akyüz Jan 2016

A Modeling Study With An Artificial Neural Network: Developing Estimationmodels For The Tomato Plant Leaf Area, Hande Küçükönder, Sedat Boyaci, Adi̇l Akyüz

Turkish Journal of Agriculture and Forestry

The leaf area measurement is an important parameter in understanding the growth and physiology of a plant. Therefore, this study aimed to develop the best leaf area estimation model for tomato plants grown in plastic greenhouse conditions. The artificial neural network (ANN) and regression analysis techniques were used in the formation of a leaf area estimation model by using the leaf width and leaf length measurements determined by the linear measurement method. The plant material for the study consisted of 420 leaf samples of the Typhoon F1 tomato type grown in plastic greenhouse conditions. In the comparison of the created …

Go to article

Evaluation Of Effects Of Water-Saving Superabsorbent Polymer On Corn (Zea Mays L.)Yield And Phosphorus Fertilizer Efficiency, Adem Güneş, Nurgül Kitir, Meti̇n Turan, Erdal Elkoca, Ertan Yildirim, Nazmi̇ye Avci Jan 2016

Evaluation Of Effects Of Water-Saving Superabsorbent Polymer On Corn (Zea Mays L.)Yield And Phosphorus Fertilizer Efficiency, Adem Güneş, Nurgül Kitir, Meti̇n Turan, Erdal Elkoca, Ertan Yildirim, Nazmi̇ye Avci

Turkish Journal of Agriculture and Forestry

There is growing interest in using a reduced rate of mineral fertilizer along with water-saving superabsorbent polymer (WSAP) for field crop production in arid and semiarid regions of the world. The overall objective of this study was to evaluate the effects of hydrogel applications on the phosphorus fertilizer efficiency parameter, yield, and selected physiological properties of corn (Zea mays L.) grown at different levels of water deficiency in greenhouse conditions. The experimental design consisted of 3 completely randomized blocks in a factorial arrangement, with 9 hydrogel doses (0%, 0.01%, 0.02%, 0.04%, 0.08%, 0.12%, 0.2%, 0.4%, and 0.6%), 4 phosphorus fertilizer …

Go to article

Combined Effects Of Oxalic Acid Treatment And Modified Atmosphere Packaging On Postharvest Quality Of Loquats During Storage, Ayşe Tüli̇n Öz, Nesi̇be Ebru Kafkas, Adnan Bozdoğan Jan 2016

Combined Effects Of Oxalic Acid Treatment And Modified Atmosphere Packaging On Postharvest Quality Of Loquats During Storage, Ayşe Tüli̇n Öz, Nesi̇be Ebru Kafkas, Adnan Bozdoğan

Turkish Journal of Agriculture and Forestry

Effectiveness of two different (3 mM and 6 mM) concentrations of oxalic acid (OA) application in combination with modified atmosphere packaging (MAP) on skin browning, fruit skin color (L*, a*, b*) values, fruit flesh firmness, total soluble solids (TSS), titratable acidity (TA), ratio of TSS/TA, pH total phenolic content (TPC), total flavonoid content (TFC), organic acids and soluble sugars, and percentage of O2/CO2 change in Hafif Çukurgöbek loquats stored at 5 °C for 30 days were evaluated. Findings indicated that skin browning was reduced by pre-storage OA application in loquats. Furthermore, OA treatment produced the promising effects of inhibiting increases …

Go to article

A Web-Based Decision Support System To Select Proper Machinery Size And Tractor Power, Çağdaş Ci̇velek, Sai̇t Muharrem Say Jan 2016

A Web-Based Decision Support System To Select Proper Machinery Size And Tractor Power, Çağdaş Ci̇velek, Sai̇t Muharrem Say

Turkish Journal of Agriculture and Forestry

One of the most important key factors for efficient and profitable agricultural production is agricultural mechanization. Since agricultural mechanization system expenses are nearly 30% of an agricultural enterprise investment, the mechanization system should be planned very carefully. Since internet technologies have spread into all areas, including agriculture, a web-based decision support system (DSS) was developed to plan an agricultural machinery system to be used in Turkey's farm enterprises. The developed DSS was written in PHP and the databases were created using the MySQL database administration system. Several tables to select proper machine size and tractor power, including tractor test report …

Go to article

Short-Term Effects Of Warming Treatment And Precipitation Manipulation On The Ecophysiological Responses Of Pinus Densiflora Seedlings, Soon Jin Yun, Saerom Han, Seung Hyun Han, Seongjun Kim, Guanlin Li, Minji Park, Yowhan Son Jan 2016

Short-Term Effects Of Warming Treatment And Precipitation Manipulation On The Ecophysiological Responses Of Pinus Densiflora Seedlings, Soon Jin Yun, Saerom Han, Seung Hyun Han, Seongjun Kim, Guanlin Li, Minji Park, Yowhan Son

Turkish Journal of Agriculture and Forestry

The aim of this study was to investigate the short-term effects of warming treatment and precipitation manipulation on the growth, photosynthetic rate, and chlorophyll content of Pinus densiflora seedlings based on a climate change scenario in Korea. Two-year-old P. densiflora seedlings were planted in a nursery in April 2013. The air temperature of warmed plots (W) was set to increase by 3 °C compared to control plots (C) using an infrared heater in May 2013. The three precipitation manipulations consisted of decreased precipitation using transparent panels (-30%; P-), increased precipitation using pumps and drip irrigation (+30%; P+), and a control …

Go to article

Identification Of Olive Cultivars Using Image Processing Techniques, Abdullah Beyaz, Ramazan Öztürk Jan 2016

Identification Of Olive Cultivars Using Image Processing Techniques, Abdullah Beyaz, Ramazan Öztürk

Turkish Journal of Agriculture and Forestry

As a country in an olive production zone, olive (Olea europaea L.) production is of great economic importance for Turkey. Turkey has 88 domestic and 28 foreign cultivars of olive, all of which are located in the Kemalpaşa Production and Research Garden (Olive Gene Bank) at the Olive Research Station in İzmir (38°25'34.7628''N, 27°25'22.9872''E). The aim of this study was the identification of olive cultivars using image processing techniques. For this aim, images of olives, taken at 2896 x 1944 pixel and 300 dpi resolution, were captured using a DSLR camera, and evaluations of pixels were used for considering the …

Go to article

Bread Wheat Responds Salt Stress Better Than Einkorn Wheat Does During Germination, Di̇dem Aslan, Nusret Zenci̇rci̇, Murat Etöz, Bülent Ordu, Sara Bataw Jan 2016

Bread Wheat Responds Salt Stress Better Than Einkorn Wheat Does During Germination, Di̇dem Aslan, Nusret Zenci̇rci̇, Murat Etöz, Bülent Ordu, Sara Bataw

Turkish Journal of Agriculture and Forestry

Salt stress during germination degenerates crop establishment and declines yield in wheat (Triticum subsp.). Against salt (NaCl) stress, we investigated 12 bread (Triticum aestivum L.) and 10 einkorn wheat (T. monococcum subsp. monococcum) entries for germination rate, germinating power, coleoptile length, shoot length, root length, shoot/root length ratio, root fresh weight, root dry weight, and root fresh/dry weigh ratio. An effective blocking in variance analysis improved statistical significance and differentiation between germination stages and wheat entries. Salt total and salt ranking tolerance indices grouped the wheat entries into tolerant (Bayraktar 2000, Gerek 79, İkizce 96, Gün 91, Demir 2000, and …

Go to article

Color, Phenolic Composition, And Antioxidant Properties Of Hardaliye(Fermented Grape Beverage) Under Different Storage Conditions, Buket Aşkin, Azi̇ze Ati̇k Jan 2016

Color, Phenolic Composition, And Antioxidant Properties Of Hardaliye(Fermented Grape Beverage) Under Different Storage Conditions, Buket Aşkin, Azi̇ze Ati̇k

Turkish Journal of Agriculture and Forestry

This study was conducted to determine the effects of storage temperature and time on color and antioxidant properties of hardaliye. Hardaliye was obtained from papazkarası blue-black grapes as a potential source of anthocyanin pigment and high antioxidant activity. Grape variety plays a significant role in color, flavor, and chemical properties. However, the effects of storage conditions on products and especially on phenolic composition and antioxidant properties are not known because there is not any research about storage effects at different temperatures. For this purpose, hardaliye was produced by the conventional method. After having been exposed to lactic acid fermentation, it …

Go to article

Effects Of High Temperature Stress On Enzymatic And Nonenzymaticantioxidants And Proteins In Strawberry Plants, Sergül Ergi̇n, Hati̇ce Gülen, Müge Kesi̇ci̇, Ece Turhan, Ahmet İpek, Nezi̇he Köksal Jan 2016

Effects Of High Temperature Stress On Enzymatic And Nonenzymaticantioxidants And Proteins In Strawberry Plants, Sergül Ergi̇n, Hati̇ce Gülen, Müge Kesi̇ci̇, Ece Turhan, Ahmet İpek, Nezi̇he Köksal

Turkish Journal of Agriculture and Forestry

The mechanism of tolerance to high temperatures was investigated in two strawberry (Fragaria x ananassa Duch) cultivars, 'Redlands Hope' ('R. Hope', heat tolerant) and 'Cal. Giant 3' ('CG3', heat sensitive). Leaves were collected from plants that were exposed to gradual heat stress and heat-shock stress separately. The contents of nonenzymatic antioxidants such as ascorbic acid (AsA) and glutathione (GSH) and the activities of enzymatic antioxidants such as ascorbate peroxidase (APX) (EC 1.11.1.11), catalase (CAT) (EC 1.11.1.6), and glutathione reductase (GR) (EC. 1.6.4.2) were measured followed by heat treatments. Additionally, proline content was determined, and heat shock proteins (HSPs) were analyzed …

Go to article

Estimation Of Submarine Groundwater Discharge Into The Indian River Lagoon, Ashok Pandit, N. Ali, H. Heck, K. Mamoua Jan 2016

Estimation Of Submarine Groundwater Discharge Into The Indian River Lagoon, Ashok Pandit, N. Ali, H. Heck, K. Mamoua

Mechanical and Civil Engineering Faculty Publications

A calibrated and validated finite difference numerical model was used to estimate the spatial and temporal distribution of the Meteoric Groundwater Discharge (MGWD) and Submarine Groundwater Discharge (SGD) into a coasted estuary known as the Indian River Lagoon (IRL) at two transects. Specifically, this paper describes the methodology used to determine: a) the quantity of MGWD originating from the mainland and the barrier island, b) the spatial distribution of the SGD into the IRL, c) the groundwater salinity and hydraulic head distribution below the IRL, and d) the regional flow directions of the MGWD and the Oceanic Groundwater Discharge (OGWD) …

Go to article

Cfd Prediction And Simulation Of A Pumpjet Propulsor, Lin Lu, Guang Pan, Prasanta K. Sahoo Jan 2016

Cfd Prediction And Simulation Of A Pumpjet Propulsor, Lin Lu, Guang Pan, Prasanta K. Sahoo

Ocean Engineering and Marine Sciences Faculty Publications

In this study an attempt has been made to study the hydrodynamic performance of pumpjet propulsor. Numerical investigation based on the Reynolds Averaged NaviereStokes (RANS) computational fluid dynamics (CFD) method has been carried out. The structured grid and SST keu turbulence model have been applied. The numerical simulations of open water performance of marine propeller E779A are carried out with different advance ratios to verify the numerical simulation method. Results show that the thrust and the torque are in good agreements with experimental data. The grid independent inspection is applied to verify accuracy of numerical simulation grid. The numerical predictions …

Go to article

Designing Sustainable Urban Futures: Concepts And Practices From Different Countries, Marius Albiez, Gerhard Banse, Kenyon C. Lindeman, Alexandra Quint Jan 2016

Designing Sustainable Urban Futures: Concepts And Practices From Different Countries, Marius Albiez, Gerhard Banse, Kenyon C. Lindeman, Alexandra Quint

Ocean Engineering and Marine Sciences Faculty Publications

Many 21st century cities have the potential to be sustainable and resource-saving living spaces when multifunctional structures, well-integrated transportation infrastructure, and democratic governance processes are present. Sustainable urban futures require a focus on the needs of humans and environmental best practices, as well as on the creative scope for community-driven sustainability innovations. This book is based on contributions from science and practice to the international symposium on “Sustainable Urban Development at Different Scales” organized by the Institute for Technology Assessment and Systems Analysis at the Karlsruhe Institute of Technology, Karlsruhe, Germany, in May 2014. The symposium used the global urbanization …

Go to article

Benthic Marine Calcifiers Coexist With Caco3-Undersaturated Seawater Worldwide, Mario Lebrato, Andreas J. Andersson, Justin Baker Ries, Richard B. Aronson, Miles D. Lamare, Wolfgang Koeve, Andreas Oschlies, Maria Débora Iglesias-Rodríguez, Sven Thatje, M. Amsler, Stephanie C. Vos, D. O. B. Jones, H. A. Ruhl, A. R. Gates, J. B. Mcclintock Jan 2016

Benthic Marine Calcifiers Coexist With Caco3-Undersaturated Seawater Worldwide, Mario Lebrato, Andreas J. Andersson, Justin Baker Ries, Richard B. Aronson, Miles D. Lamare, Wolfgang Koeve, Andreas Oschlies, Maria Débora Iglesias-Rodríguez, Sven Thatje, M. Amsler, Stephanie C. Vos, D. O. B. Jones, H. A. Ruhl, A. R. Gates, J. B. Mcclintock

Ocean Engineering and Marine Sciences Faculty Publications

Ocean acidification and decreasing seawater saturation state with respect to calcium carbonate (CaCO3) minerals have raised concerns about the consequences to marine organisms that build CaCO3 structures. A large proportion of benthic marine calcifiers incorporate Mg2+ into their skeletons (Mg-calcite), which, in general, reduces mineral stability. The relative vulnerability of some marine calcifiers to ocean acidification appears linked to the relative solubility of their shell or skeletal mineralogy, although some organisms have sophisticated mechanisms for constructing and maintaining their CaCO3 structures causing deviation from this dependence. Nevertheless, few studies consider seawater saturation state with respect to the actual Mg-calcite mineralogy …

Go to article

Sands Of Time: A Renourished Beach Vs. A Non-Renourished Beach, Tania Kilcullen Jan 2016

Sands Of Time: A Renourished Beach Vs. A Non-Renourished Beach, Tania Kilcullen

Ocean Engineering and Marine Sciences Student Publications

The effects of beach renourishment were examined at two different beaches located in Brevard County, Florida: Avenue Band Ponce Landing. Two profiles were taken the summer of 2015 at Avenue B and one profile was taken at Ponce Landing. These profiles were then compared to previous years at the same beaches. Avenue B, a renourished beach, and Ponce Landing, a non-renourished beach, showed variability in the elevation, volume, and mean elevation difference between the years 2010-2015. The results indicated that beach renourishment has a significant difference in the mean elevation difference. Even though a renourished beach will have a net …

Go to article

Onshore Wind Acceleration Across The Indian River Lagoon, Mohamed Al Sabri Jan 2016

Onshore Wind Acceleration Across The Indian River Lagoon, Mohamed Al Sabri

Ocean Engineering and Marine Sciences Student Publications

A study of the onshore (easterly) flow crossing the barrier island and Indian River Lagoon (IRL), in east central Florida, was conducted during the summer of 2015 in association with the DMES Field Projects. Wind observations were collected from three instruments including a vertically pointing lidar, a Kestrel sensor mounted at 10 m, and an AirMar sensor deployed (at 2 m) on a pontoon boat. The observations indicate that the downstream (IRL) wind speed (10 m) was actually higher than beachside. Surface roughness estimates are obtained from the lidar-observed wind profiles beachside and downwind along the western shore of the …

Go to article

International Female Graduate Students' Experience At A Midwestern University: Sense Of Belonging And Identity Development, Anh T. Le, Barbara Lacost, Michael Wismer Jan 2016

International Female Graduate Students' Experience At A Midwestern University: Sense Of Belonging And Identity Development, Anh T. Le, Barbara Lacost, Michael Wismer

Department of Educational Administration: Faculty Publications

International female graduate students have to negotiate multiple aspects of their identities as non-native learners and women in a society with different gender norms than their home countries. However, their experiences have not been well researched within the scholarship on international students. In this study, using the phenomenological approach, we explored the phenomenon of being an international female graduate student in the U.S. The seven participants are diverse in terms of countries of origin, academic programs, and life situations. Using open-ended questions, we conducted indepth one-on-one interviews with the participants. The findings indicate that the participants perceived being international female …

Go to article

Noninvasive Measurement Of Electrical Events Associated With A Single Chlorovirus Infection Of A Microalgal Cell, Seung-Woo Lee, Eun-Hee Lee, Gerhard Thiel, James L. Van Etten, Ravi Saraf Jan 2016

Noninvasive Measurement Of Electrical Events Associated With A Single Chlorovirus Infection Of A Microalgal Cell, Seung-Woo Lee, Eun-Hee Lee, Gerhard Thiel, James L. Van Etten, Ravi Saraf

Department of Chemical and Biomolecular Engineering: Faculty Publications

Chlorovirus Paramecium bursaria chlorella virus 1 (PBCV-1) contains a viral-encoded K+ channel imbedded in its internal membrane, which triggers host plasma membrane depolarization during virus infection. This early stage of infection was monitored at high resolution by recording the cell membrane depolarization of a single Chlorella cell during infection by a single PBCV-1 particle. The measurement was achieved by depositing the cells onto a network of one-dimensional necklaces of Au nanoparticles, which spanned two electrodes 70 μm apart. The nanoparticle necklace array has been shown to behave as a single-electron device at room temperature. The resulting electrochemical field-effect transistor …

Go to article

The Metal/Organic Interface In Cobalt/Vinylidene Fluoride Heterostructures, Keith Foreman, E Echeverria, Mark A. Koten, R. M. Lindsay, N. Hong, Jeffrey E. Shield, Shireen Adenwalla Jan 2016

The Metal/Organic Interface In Cobalt/Vinylidene Fluoride Heterostructures, Keith Foreman, E Echeverria, Mark A. Koten, R. M. Lindsay, N. Hong, Jeffrey E. Shield, Shireen Adenwalla

Shireen Adenwalla Papers

Organic-based electronic devices are rapidly increasing in popularity, making it essential to understand and characterize the interface between organic materials and metallic electrodes. This work reports on the characterization of the interface between thin films of an emerging organic ferroelectric, vinylidene fluoride (VDF) oligomer, and Co, an important high Curie temperature ferromagnet. Using a wide battery of experimental techniques, it is shown that VDF oligomer thin films as thin as 15 nm can halt, or prevent, Co oxidization in atmospheric conditions, a necessary condition for device applications. Selectivity of magnetic properties, such as remanent magnetization, is enabled by the clarification …

Go to article

Ferroelectric Characterization And Growth Optimization Of Thermally Evaporated Vinylidene Fluoride Thin Films, Keith Foreman, N. Hong, C. Labedz, C. Shearer, Stephen Ducharme, Shireen Adenwalla Jan 2016

Ferroelectric Characterization And Growth Optimization Of Thermally Evaporated Vinylidene Fluoride Thin Films, Keith Foreman, N. Hong, C. Labedz, C. Shearer, Stephen Ducharme, Shireen Adenwalla

Shireen Adenwalla Papers

Organic thin films have numerous advantages over inorganics in device processing and price. The large polarization of the organic ferroelectric oligomer vinylidene fluoride (VDF) could prove useful for both device applications and the investigation of fundamental physical phenomena. A VDF oligomer thin film vacuum deposition process, such as thermal evaporation, preserves film and interface cleanliness, but is challenging, with successful deposition occurring only within a narrow parameter space. We report on the optimal deposition parameters for VDF oligomer thin films, refining the parameter space for successful deposition, resulting in a high yield of robust ferroelectric films. In particular, we investigate …

Go to article

Magnetic And Magneto-Transport Studies Of Substrate Effect On The Martensitic Transformation In A Nimnin Shape Memory Alloy, Andrei Sokolov, Eugene Kirianov, Albina Zlenko, Abdiel Quetz, Anil Aryal, Sudip Pandey, Igor Dubenko, Shane Stadler, Naushad Ali, Nabil M. Al-Aqtash, Renat F. Sabirianov Jan 2016

Magnetic And Magneto-Transport Studies Of Substrate Effect On The Martensitic Transformation In A Nimnin Shape Memory Alloy, Andrei Sokolov, Eugene Kirianov, Albina Zlenko, Abdiel Quetz, Anil Aryal, Sudip Pandey, Igor Dubenko, Shane Stadler, Naushad Ali, Nabil M. Al-Aqtash, Renat F. Sabirianov

Department of Physics and Astronomy: Faculty Publications

The effect of substrates on the magnetic and transport properties of Ni2Mn1.5In0.5 ultra-thin films were studied theoretically and experimentally. High quality 8-nm films were grown by laser-assisted molecular beam epitaxy deposition. Magnetotransport measurements revealed that the films undergo electronic structure transformation similar to those of bulk materials at the martensitic transformation. The temperature of the transformation depends strongly on lattice parameters of the substrate. To explain this behavior, we performed DFT calculations on the system and found that different substrates change the relative stability of the ferromagnetic (FM) austenite and ferrimagnetic (FiM) martensite states. We …

Go to article

Stability Of Skyrmion Lattices And Symmetries Of Quasi-Two-Dimensional Chiral Magnets, Utkan Güngördü, Rabindra Nepal, Oleg A. Tretiakov, Kirill D. Belashchenko, Alexey Kovalev Jan 2016

Stability Of Skyrmion Lattices And Symmetries Of Quasi-Two-Dimensional Chiral Magnets, Utkan Güngördü, Rabindra Nepal, Oleg A. Tretiakov, Kirill D. Belashchenko, Alexey Kovalev

Department of Physics and Astronomy: Faculty Publications

Recently there has been substantial interest in realizations of skyrmions, in particular in quasi-two-dimensional (2D) systems due to increased stability resulting from reduced dimensionality. A stable skyrmion, representing the smallest realizable magnetic texture, could be an ideal element for ultradense magnetic memories. Here we use the most general form of the quasi-2D free energy with Dzyaloshinskii-Moriya interactions constructed from general symmetry considerations reflecting the underlying system. We predict that the skyrmion phase is robust and it is present even when the system lacks the in-plane rotational symmetry. In fact, the lowered symmetry leads to increased stability of vortex-antivortex lattices with …

Go to article

Magnetoelectric Domain Wall Dynamics And Its Implications For Magnetoelectric Memory, Kirill D. Belashchenko, Oleg Tchernyshyov, Alexey Kovalev, Oleg A. Tretiakov Jan 2016

Magnetoelectric Domain Wall Dynamics And Its Implications For Magnetoelectric Memory, Kirill D. Belashchenko, Oleg Tchernyshyov, Alexey Kovalev, Oleg A. Tretiakov

Department of Physics and Astronomy: Faculty Publications

Domain wall dynamics in a magnetoelectric antiferromagnet is analyzed, and its implications for magnetoelectric memory applications are discussed. Cr2O3 is used in the estimates of the materials parameters. It is found that the domain wall mobility has a maximum as a function of the electric field due to the gyrotropic coupling induced by it. In Cr2O3, the maximal mobility of 0.1 m/(s Oe) is reached at E = 0.06 V/nm. Fields of this order may be too weak to overcome the intrinsic depinning field, which is estimated for B-doped Cr2O3 …

Go to article

First Prev Next Last