Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physical Sciences and Mathematics (3322)
- Education (1068)
- Engineering (850)
- Social and Behavioral Sciences (689)
- Environmental Sciences (673)
-
- Computer Sciences (628)
- Physics (544)
- Chemistry (463)
- Arts and Humanities (428)
- Law (422)
- Life Sciences (405)
- Earth Sciences (368)
- Higher Education (315)
- Mathematics (269)
- Electrical and Computer Engineering (217)
- Statistics and Probability (207)
- History (196)
- Science and Mathematics Education (191)
- Oceanography and Atmospheric Sciences and Meteorology (183)
- Business (169)
- Mechanical Engineering (165)
- Medicine and Health Sciences (153)
- Geology (142)
- Educational Administration and Supervision (140)
- Communication (139)
- Astrophysics and Astronomy (135)
- Natural Resources and Conservation (124)
- Computer Engineering (120)
- Materials Science and Engineering (117)
- Teacher Education and Professional Development (117)
- Institution
-
- University of Nebraska - Lincoln (662)
- TÜBİTAK (257)
- Louisiana State University (198)
- University of South Florida (193)
- Nova Southeastern University (178)
-
- California Polytechnic State University, San Luis Obispo (176)
- University of Nevada, Las Vegas (175)
- Missouri University of Science and Technology (148)
- Old Dominion University (127)
- University of Northern Iowa (124)
- Wright State University (119)
- University of New Hampshire (114)
- Utah State University (112)
- Brigham Young University (111)
- Air Force Institute of Technology (108)
- West Virginia University (107)
- University of Kentucky (106)
- Singapore Management University (102)
- University of Montana (99)
- Eastern Illinois University (96)
- Wayne State University (92)
- COBRA (87)
- New Jersey Institute of Technology (79)
- Rochester Institute of Technology (78)
- University of Mississippi (76)
- Chinese Chemical Society | Xiamen University (73)
- Syracuse University (73)
- Portland State University (72)
- University of North Dakota (72)
- Dartmouth College (71)
- Keyword
-
- Education (109)
- Newspaper (64)
- Research (56)
- Newsletter (49)
- Students (45)
-
- Water (45)
- Faculty (41)
- Mathematics (41)
- Economics (39)
- Periodicals (37)
- Higher education (35)
- Western Australia (35)
- EIU (34)
- Student achievement (34)
- Eastern Illinois University (32)
- Kentucky (32)
- Climate (31)
- Daily Eastern News (31)
- Teachers (31)
- Bowling Green State University (30)
- Faculty Senate (29)
- Western Kentucky University (29)
- Geology (28)
- UAB (28)
- College publications (27)
- EReporter (27)
- Professional development (27)
- Physics (26)
- Academic achievement (25)
- Alumni (25)
- Publication
-
- Theses and Dissertations (253)
- Faculty Publications (190)
- United States Department of Agriculture Wildlife Services: Staff Publications (125)
- Abraham S. Fischler College of Education ETD Archive (113)
- Theses (109)
-
- Graduate Theses, Dissertations, and Problem Reports (ETD) (98)
- Turkish Journal of Chemistry (95)
- Research Collection School Of Computing and Information Systems (77)
- LSU Master's Theses (76)
- Journal of Electrochemistry (73)
- LSU Doctoral Dissertations (71)
- Dissertations (65)
- Turkish Journal of Physics (62)
- Electronic Theses and Dissertations (61)
- Journal of Modern Applied Statistical Methods (60)
- United States Geological Survey: Staff Publications (52)
- Nebraska Tractor Tests (51)
- Articles (50)
- Theses Digitization Project (50)
- Physics Faculty Publications (46)
- USF Tampa Graduate Theses and Dissertations (46)
- Thai Environment (42)
- Commencement Programs (40)
- Physics Faculty Research & Creative Works (39)
- Turkish Journal of Mathematics (39)
- UNLV Retrospective Theses & Dissertations (39)
- Department of Computer Science Technical Reports (38)
- Masters Theses (38)
- Cal Poly Student Newspaper (37)
- Graduate Research Papers (37)
- Publication Type
- File Type
Articles 7441 - 7470 of 8167
Full-Text Articles in Entire DC Network
The Effect Of Tert-Butylhydroperoxide On The Thiol Redox Status In Human Erythrocytes And The Protective Role Of Glucose And Antioxidants, Yasemi̇n Aksoy, İ. Hamdi̇ Öğüş, Nazmi̇ Özer
The Effect Of Tert-Butylhydroperoxide On The Thiol Redox Status In Human Erythrocytes And The Protective Role Of Glucose And Antioxidants, Yasemi̇n Aksoy, İ. Hamdi̇ Öğüş, Nazmi̇ Özer
Turkish Journal of Chemistry
For survival, living cells maintain their thiol redox status within acceptable limits by three different mechanisms: i. glutathione disulfide export, ii. reduction of glutathione disulfide by pentose phosphate pathway and, iii. reduction of glutathione disulfide by Protein-SH. To assess the relative contribution of each one of the systems, intracellular [glutathione], [glutathione disulfide] and their export, in fresh and aged erythrocytes subjected to oxidative stress, in \pm glucose and \pm antioxidants, were measured. Glutathione was rapidly oxidized by tert-butylhydroperoxide in \pm glucose in both groups. The regeneration of glutathione, in both groups, in \pm glucose was about 100 and 50%, respectively. …
Synthesis Of New Antimicrobial Agents; Amide Derivatives Of Pyranones And Pyridinones, Mutlu Di̇lsi̇z Aytemi̇r, Robert C. Hider, Di̇lek Demi̇r Erol, Meral Özalp, Meli̇ke Eki̇zoğlu
Synthesis Of New Antimicrobial Agents; Amide Derivatives Of Pyranones And Pyridinones, Mutlu Di̇lsi̇z Aytemi̇r, Robert C. Hider, Di̇lek Demi̇r Erol, Meral Özalp, Meli̇ke Eki̇zoğlu
Turkish Journal of Chemistry
In this study, 4(1H)-pyridinones with an amide function in Position 2 of the pyridinone ring showed antimicrobial activity. The synthesis and the biological properties of some novel amide derivatives of pyran-4(1H)-one and 4(1H)-pyridinone have been reported. Amide derivatives of pyran-4(1H)-one and 4(1H)-pyridinone were prepared using two different methods. Antimicrobial activities were determined as MIC values using the microdilution broth method against the bacteria Staphylococcus aureus, Enterococcus faecalis, Escherichia coli and Pseudomonas aeruginosa and the fungi Candida albicans, Candida krusei and Candida parapsilosis. Compounds 6 and 9 exhibited the best inhibitor activity against S. aureus.
Voltammetric And Flow Injection Amperometric Determination Of Cysteine At A Glassy Carbon Electrode In The Presence Of Copper(Ii) Ions, Zekerya Dursun, İlyas Şahbaz, F. Ni̇l Ertaş, Gürel Ni̇şli̇
Voltammetric And Flow Injection Amperometric Determination Of Cysteine At A Glassy Carbon Electrode In The Presence Of Copper(Ii) Ions, Zekerya Dursun, İlyas Şahbaz, F. Ni̇l Ertaş, Gürel Ni̇şli̇
Turkish Journal of Chemistry
The voltammetric behaviour of cysteine was investigated in the presence of Cu(II) ions at a rotating glassy carbon electrode (RGCE). Two reduction peaks related to the successive reduction of the cysteine complexes of Cu(II) and Cu(I) ions were observed at --0.30 and --0.60 V vs. SCE respectively. These peaks were increased upon the addition of cysteine into a pH 9.20 borate buffer solution containing 0.1 M KNO_{3} and 1.0 x 10^{-5} M Cu(II) ions. The calibration curve was linear in the concentration range of 5.0 x 10^{-10}- 2.0 x 10^{-8} M for cysteine by utilising the peak current at --0.6 …
Differential Pulse Polarographic Determination Of Cadmium After Solid Liquid Extraction And Preconcentration Using Pan, Mohammad Ali Taher
Differential Pulse Polarographic Determination Of Cadmium After Solid Liquid Extraction And Preconcentration Using Pan, Mohammad Ali Taher
Turkish Journal of Chemistry
A highly selective, sensitive, rapid and economical differential pulse polarographic method has been developed for the determination of trace amounts of cadmium in various samples after the adsorption of its 1-(2-pyridylazo)-2-naphthol (PAN) complex on microcrystalline naphthalene in the pH range of 8.2-11.0. After filtration, the solid mass is shaken with 9.0 mL of 1 M hydrochloric acid and cadmium is determined by differential pulse polarography. Cadmium can alternatively be quantitatively adsorbed on [1-(2-pyridylazo)-2-naphthol]-naphthalene adsorbent packed in a column and determined similarly. The detection limit is 0.07 \mu g/mL (signal-to noise ratio = 2) and the linearity is maintained in the …
Thermogravimetric Characterization Of Turkish Bituminous Coals For Combustion, Sai̇t Kizgut, Di̇lek Cuhadaroğlu, İhsan Toroğlu
Thermogravimetric Characterization Of Turkish Bituminous Coals For Combustion, Sai̇t Kizgut, Di̇lek Cuhadaroğlu, İhsan Toroğlu
Turkish Journal of Chemistry
This study focused on the thermal gravimetric characterization of Turkish bituminous coals for combustion. The combustion properties considered were based on the burning profile of coal samples and their chars produced in a PL 1500 TGA apparatus. The coal seam samples used in the study were obtained from TTK (Turkish Hardcoal Enterprise) mines as channel samples. The majority of the samples from 12 seams were medium-volatile bituminous and only three of them were high-volatile bituminous. Combustion profile parameters of coal samples and chars were correlated with petrographic, proximate and ultimate analysis data in order to establish the combustion differences of …
Dna Cleavage Activity Of Diazonium Salts: Chemical Nucleases, Murat Kizil, Ebru İnce Yilmaz, Necmetti̇n Pi̇ri̇nççi̇oğlu, Çeti̇n Ayteki̇n
Dna Cleavage Activity Of Diazonium Salts: Chemical Nucleases, Murat Kizil, Ebru İnce Yilmaz, Necmetti̇n Pi̇ri̇nççi̇oğlu, Çeti̇n Ayteki̇n
Turkish Journal of Chemistry
4-Fenoldiazonium tetrafluoroborate and 4-benzoicaciddiazonium tetrafluoroborate was prepared and was shown to be an effective DNA cleavage agent in the presence of the 1-electron donor copper(II) chloride. Its mechanism involves the generation of the aryl radical cleaving DNA by hydrogen atom abstraction from deoxyribose sugar.
Study On Papain Immobilization On A Macroporous Polymer Carrier, Liang Ding, Zihua Yao, Tong Li, Qiang Yue, Jia Chai
Study On Papain Immobilization On A Macroporous Polymer Carrier, Liang Ding, Zihua Yao, Tong Li, Qiang Yue, Jia Chai
Turkish Journal of Chemistry
Macroporous resin microbeads of methyl methacrylate-divinyl benzene copolymer were synthesized by radical suspension polymerization of acrolein with divinylbenzene in the presence of a pore-creating agent, petroleum ether. The microbeads had a large specific surface area and large pores covered the entire surface of the resin. This macroporous polymer carrier was aminated by hydrazine hydrate that produced a large number of amino groups on the carrier. Papain was immobilized on the porous polymer carrier by glutaraldehyde cross-linking or diazo-coupling. The factors involved in the activity recovery of the immobilized papain and the enzymic properties of the resulting immobilized papain were studied …
Synthesis, Characterization And Biological Applications Of Organotin(Iv) Derivatives Of 2-(2-Fluoro-4-Biphenyl)Propanoic Acid, Sohail Mahmood, Saqib Ali, Moazzam Hussain Bhatti, Mohammad Mazhar, Rashid Iqbal, Khalid Mohammed Khan, Ghulam Mustafa Maharvi
Synthesis, Characterization And Biological Applications Of Organotin(Iv) Derivatives Of 2-(2-Fluoro-4-Biphenyl)Propanoic Acid, Sohail Mahmood, Saqib Ali, Moazzam Hussain Bhatti, Mohammad Mazhar, Rashid Iqbal, Khalid Mohammed Khan, Ghulam Mustafa Maharvi
Turkish Journal of Chemistry
A series of organotin(IV) derivatives with the general formula R_{4 - n}SnL_{n} (where n = 1 or 2, R = Me, Et, n-Bu, Ph and L = 2-(2-fluoro-4-biphenyl)propanoate) have been synthesized and characterized by infrared, multinuclear NMR (^{1}H, ^{13}C, ^{119}Sn), ^{119m}Sn Mössbauer spectroscopy and mass spectrometry. Screening tests of these compounds showed that they are highly active against various bacteria and fungi.
Effects Of Epiphyte Load On Optical Properties And Photosynthetic Potential Of The Seagrasses Thalassia Testudinum Banks Ex König And Zostera Marina L, Lisa A. Drake, Fred C. Dobbs, Richard C. Zimmerman
Effects Of Epiphyte Load On Optical Properties And Photosynthetic Potential Of The Seagrasses Thalassia Testudinum Banks Ex König And Zostera Marina L, Lisa A. Drake, Fred C. Dobbs, Richard C. Zimmerman
OES Faculty Publications
The biomass and optical properties of seagrass leaf epiphytes were measured to evaluate their potential impact on the photosynthetic performance of the seagrasses Thalassia testudinum Banks ex König (turtlegrass) and Zostera marina L. (eelgrass). Turtlegrass was obtained from oligotrophic waters near Lee Stocking Island, Bahamas; eelgrass was collected from a eutrophic environment in Monterey Bay, California. Leaf–epiphyte loads were characterized visually and quantified using measurements of their phospholipid biomass. Light absorption and reflectance of the intact epiphyte layer were determined spectrophotometrically. Turtlegrass epiphytes from the oligotrophic site absorbed a maximum of 36% of incident light in peak chlorophyll absorption …
Kinetics Of Oxidation Of Pyridylmethylsulphinylbenzimidazole By Cerium(Iv) In An Aqueous Perchloric Acid Medium, Dinesh C. Bilehal, Ravi̇raj M. Kulkarni, Sharanappa T. Nandibewoor
Kinetics Of Oxidation Of Pyridylmethylsulphinylbenzimidazole By Cerium(Iv) In An Aqueous Perchloric Acid Medium, Dinesh C. Bilehal, Ravi̇raj M. Kulkarni, Sharanappa T. Nandibewoor
Turkish Journal of Chemistry
The kinetics of oxidation of pyridylmethylsulphinylbenzimidazole [PMSB] by Ce(IV) in an aqueous perchloric acid medium at a constant ionic strength of 1.50 mol dm^{-3} were studied spectrophotometrically. The reaction showed first order kinetics with respect to Ce(IV) concentration and an apparent less than unit order dependence in [PMSB] and a zero order in [H^+]. The initial addition of products has no significant effect on the rate of the reaction. A possible mechanism is proposed here. The reaction constants involved in the mechanism have been computed. There is good agreement between the observed and calculated rate constants under different experimental conditions. …
Controls On Middle To Late Ordovician Synorogenic Deposition In The Southeastern Corner Of Laurentia, German Bayona
Controls On Middle To Late Ordovician Synorogenic Deposition In The Southeastern Corner Of Laurentia, German Bayona
University of Kentucky Doctoral Dissertations
Middle and Upper Ordovician strata in the southernmost Appalachians document initial collision along the southeastern margin of Laurentia during the Blountian orogeny, an early phase of the Taconic orogeny. Coeval drowning and exposure of different parts of the former platform and variations in stratal architecture have been attributed to tectonic and depositional loading along the collisional margin. Stratigraphic correlations, using a bentonite-graptoliteconodont time framework, a palinspastic map, and a map of subsurface basement structures, suggest that basement-fault reactivation, flexural subsidence, and eustasy variously controlled uplift, subsidence, and deposition at different sites within the peripheral foreland basin. This dissertation documents how …
Study Of The "Poor Man's Navier-Stokes" Equation Turbulence Model, Stewart Andrew Bible
Study Of The "Poor Man's Navier-Stokes" Equation Turbulence Model, Stewart Andrew Bible
University of Kentucky Master's Theses
The work presented here is part of an ongoing effort to develop a highly accurate and numerically efficient turbulence simulation technique. The paper consists of four main parts, viz., the general discussion of the procedure known as Additive Turbulent Decomposition, the derivation of the "synthetic velocity" subgrid-scale model of the high wavenumber turbulent fluctuations necessary for its implementation, the numerical investigation of this model and a priori tests of said models physical validity. Through these investigations we have demonstrated that this procedure, coupled with the use of the "Poor Mans Navier-Stokes" equation subgrid-scale model, has the potential to be …
The Effect Of Visual Art On Music Listening, Jennifer Sue Shank
The Effect Of Visual Art On Music Listening, Jennifer Sue Shank
University of Kentucky Doctoral Dissertations
The purpose of this study was to examine the effect of visual stimuli on music listening skills in pre-service elementary teachers. Visual Stimuli in this study refers to the presentation of arts elements in selected visually projected images of paintings. Music listening skills are defined as those skills needed to identify and interpret musical excerpts. A Pretest-Posttest Control-group Design was used in this study. Subjects were pre-service elementary general educators enrolled in a large southern university (N=93). Students from intact classes were randomly placed into either the experimental group or the control group. The treatment consisted of six music listening …
Tunneling Study Of Superconductivity In Magnesium Diboride, Mohamed Hosiny Badr
Tunneling Study Of Superconductivity In Magnesium Diboride, Mohamed Hosiny Badr
University of Kentucky Doctoral Dissertations
Although the pairing mechanism in MgB2 is thought to be phonon mediated, there are still many experimental results that lack appropriate explanation. For example, there is no consensus about the magnitude of the energy gap, its temperature dependence, and whether it has only one-gap or not. Many techniques have been used to investigate this, like Raman spectroscopy, farinfrared transmission, specific heat, high-resolution photoemission and tunneling. Most tunneling data on MgB2 are obtained from mechanical junctions. Measurements of energy gap by these junctions have many disadvantages like the instability to temperature and field changes. On the other hand, sandwich-like planar junctions …
Technology As A Scapegoat, Wendi B. Denman
Revising Horn Formulas, Jignesh Umesh Doshi
Revising Horn Formulas, Jignesh Umesh Doshi
University of Kentucky Master's Theses
Boolean formulas can be used to model real-world facts. In some situation we may havea Boolean formula that closely approximates a real-world fact, but we need to fine-tune itso that it models the real-world fact exactly. This is a problem of theory revision where thetheory is in the form of a Boolean formula. An algorithm is presented for revising a class ofBoolean formulas that are expressible as conjunctions of Horn clauses. Each of the clausesin the formulas considered here has a unique unnegated variable that does not appear inany other clauses, and is not `F'. The revision algorithm uses equivalence …
An Approach To The Measurement Of Sexual Behavior In The Bull (Bos Taurus) Using Variable Female Stimulus Conditions, John Denver Bailey
An Approach To The Measurement Of Sexual Behavior In The Bull (Bos Taurus) Using Variable Female Stimulus Conditions, John Denver Bailey
University of Kentucky Doctoral Dissertations
Most researchers studying sexual behavior of the bull have adopted the practice of severely restraining and sedating female stimuli, utilizing so-called "service stanchions" and quantifying behavioral events expressed by each bull. Based on these observations, bulls are classified as having high, medium, or low libido and ranked according to their ability to "service" the inanimate stimuli. It has been assumed that these methods represent appropriate measurements of reproductive behavior that will be expressed in a natural mating scenario and that bull sexual behavior can be studied in a manner that is independent of the context of the female. Hence, conventional …
A Survey Of Limited Nondeterminism In Computational Complexity Theory, Matthew Asher Levy
A Survey Of Limited Nondeterminism In Computational Complexity Theory, Matthew Asher Levy
University of Kentucky Master's Theses
Nondeterminism is typically used as an inherent part of the computational models used incomputational complexity. However, much work has been done looking at nondeterminism asa separate resource added to deterministic machines. This survey examines several differentapproaches to limiting the amount of nondeterminism, including Kintala and Fischer's βhierarchy, and Cai and Chen's guess-and-check model.
A Spatial Model For Evaluating Variable-Rate Fertilizer Application Accuracy, John Patrick Fulton
A Spatial Model For Evaluating Variable-Rate Fertilizer Application Accuracy, John Patrick Fulton
University of Kentucky Doctoral Dissertations
The popularity of variable-rate technology (VRT) has grown. However, the limitations and errors ofthis technology are generally unknown. Therefore, a spatial data model was developed to generate "asapplied"surfaces to advance precision agricultural (PA) practices. A test methodology based on ASAEStandard S341.2 was developed to perform uniform-rate (UR) and variable-rate (VR) tests to characterizedistribution patterns testing four VRT granular applicators (two spinner spreaders and two pneumaticapplicators). Single-pass UR patterns exhibited consistent shapes for three of the applicators with patternsshifts observed for the fourth applicator. Simulated overlap analysis showed that three of the applicatorsperformed satisfactorily with most CVs less than 20% while …
Transmission Electron Microscopy And Flow Field-Flow Fractionation: Exploration Of The Nanoscopic Components In Partially Reduced Polyoxomolybdates By Kinetic Precipitation With De Novo Organic Molecules, Yan Zhu
University of Kentucky Doctoral Dissertations
Although molybdenum blue solutions have been known for more than twocenturies, an understanding of their chemical nature is only beginning to emerge.This dissertation aimed at elucidating the structural nature of the polydisperse,nanoscopic components in the solution phases and the solid states of partiallyreduced polyoxomolybdate (Mo-POM). The study offered at least fourcontributions to the area: (1) a rational protocol for the molecular recognition ofMo-POM with de novo organic hosts. (2) demonstration of kinetic precipitation ofa dynamic mixture of polyoxomolybdates and application of the technique to thestudy of the dynamic mixture by TEM (3) characterization of the Mo-POMnanostructures by an unusual combination …
Linear And Nonlinear Modeling Of Asperity Scale Frictional Melting In Brittle Fault Zones, Ravi V. S. Kanda
Linear And Nonlinear Modeling Of Asperity Scale Frictional Melting In Brittle Fault Zones, Ravi V. S. Kanda
University of Kentucky Master's Theses
Study of pseudotachylytes (PT) (frictional melts) can provide information on the physical and chemical conditions at the earthquake source. This study examines the influence of asperityscale fault dynamics on asperity temperature distribution, and therefore, the potential for frictional melting to occur. Frictional melting occurs adiabatically, and is initiated between opposing asperity tips during fault slip. Our model considers 2-D heat conduction in elastic, isotropic, hemispherical asperities, with temperature dependent thermal properties. The only heat source is a point heat flux pulse at the asperity tip. The non-linear problem was solved using the -form of Newton-Kantorovich procedure coupled with the -form …
Analysis And Application Of Capacitive Displacement Sensors To Curved Surfaces, Philip T. Smith Jr.
Analysis And Application Of Capacitive Displacement Sensors To Curved Surfaces, Philip T. Smith Jr.
University of Kentucky Master's Theses
Capacitive displacement sensors have many applications where non-contact, high precision measurement of a surface is required. Because of their non-contact nature they can easily measure conductive surfaces that are flexible or otherwise unable to be measured using a contact probe. Since the output of the capacitance gage is electrical, data points can be collected quickly and averaged to improve statistics. It is often necessary for capacitive displacement sensors to gage the distance from a curved (non-flat) surface. Although displacements can easily be detected, the calibration of this output can vary considerably from the flat case. Since a capacitance gage is …
Pattern Evaluation For In-Plane Displacement Measurement Of Thin Films, Phanikrishna Thota
Pattern Evaluation For In-Plane Displacement Measurement Of Thin Films, Phanikrishna Thota
University of Kentucky Master's Theses
The term Gossamer is used to describe ultra-lightweight spacecraft structures that solve the aerospace challenge of obtaining maximum performance while reducing the launch costs of the spacecraft. Gossamer structures are extremely compliant, which complicates control design and ground testing in full scale. One approach is to design and construct smaller test articles and verify their computational models experimentally, so that similar computational models can be used to predict the dynamic performance of full-scale structures. Though measurement of both in-plane and out-of-plane displacements is required to characterize the dynamic response of the surface of these structures, this thesis lays the groundwork …
Design Of A Lorentz, Slotless Self-Bearing Motor For Space Applications, Barrett Alan Steele
Design Of A Lorentz, Slotless Self-Bearing Motor For Space Applications, Barrett Alan Steele
University of Kentucky Master's Theses
The harsh conditions of space, the stringent requirements for orbiting devices, and the increasing precision pointing requirements of many space applications demand an actuator that can provide necessary force while using less space and power than its predecessors. Ideally, this actuator would be able to isolate vibrations and never fail due to mechanical wear, while pointing with unprecedented accuracy. This actuator has many space applications from satellite optical communications and satellite appendage positioning to orbiting telescopes. This thesis presents the method of design of such an actuator a self-bearing motor. The actuator uses Lorentz forces to generate both torque and …
Analysis Of Hydrodynamic Effects Of Microasperity Shapes On Thrust Bearing Surfaces, Ravinder Babu Siripuram
Analysis Of Hydrodynamic Effects Of Microasperity Shapes On Thrust Bearing Surfaces, Ravinder Babu Siripuram
University of Kentucky Master's Theses
The present thesis is a comparative study of the hydrodynamic effects of a few deterministic microasperity shapes in a thrust slider application. Numerical study based on finite difference methods is used to find the trend of important tribological properties such as friction and leakage. Also, this work utilizes a distinctive and practical approach for comparison by considering constant load conditions, instead of constant film thickness, as is expected in an operating thrust bearing. The results are encouraging and clearly reveal the existence of a transition point for asperity area fraction where a reversal in trends for both the coefficient of …
Mode-Cleaning And Injection Optics Of The Gravitational-Wave Detector Geo600, S. Goßler, M. M. Casey, A. Grant, H. Grote, Volker Quetschke
Mode-Cleaning And Injection Optics Of The Gravitational-Wave Detector Geo600, S. Goßler, M. M. Casey, A. Grant, H. Grote, Volker Quetschke
Physics & Astronomy Faculty Publications
The British–German interferometric gravitational-wave detector GEO600 uses two high-finesse triangular ring cavities of 8 m optical pathlength each, as an optical mode-cleaning system. The modecleaner system is housed in an ultrahigh-vacuum environment to avoid contamination of the optics and to minimize both the influence of refractive index variations of the air and acoustic coupling to the optics. To isolate the cavities from seismic noise, all optical components are suspended as double pendulums. These pendulums are damped at their resonance frequencies at the upper pendulum stage with magnet-coil actuators. A suspended reaction mass supports three coils matching magnets bonded onto the …
Polyethyleneimine-Coated Capillaries For The Separation Of Dna By Capillary Electrophoresis, M. Sai̇d Nutku, F. Bedi̇a Eri̇m Berker
Polyethyleneimine-Coated Capillaries For The Separation Of Dna By Capillary Electrophoresis, M. Sai̇d Nutku, F. Bedi̇a Eri̇m Berker
Turkish Journal of Chemistry
A new capillary electrophoresis of DNA fragments has been achieved with the cooperative effects of the electrophoretic and electroosmotic mobilities realized via the polyethyleneimine (PEI) coating of the capillary walls. As a result, seven of the 11 different-sized DNA fragments have produced resolved CE peaks. Our results demonstrate that analyses of DNA constituents can be performed under a wide range of conditions by the appropriate tuning of the coating and filler within the capillary.
Synthesis Of Some New Benzimidazole Carbamate Derivatives For Evaluation Of Antifungal Activity, Canan Kuş, Nurten Altanlar
Synthesis Of Some New Benzimidazole Carbamate Derivatives For Evaluation Of Antifungal Activity, Canan Kuş, Nurten Altanlar
Turkish Journal of Chemistry
The synthesis and structure elucidation of methyl 5(6)-fluoro-6(5)-substituted-1H-benzimidazole carbamate derivatives are performed and their antifungal activities evaluated against Candida albicans.