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Bahram H. Arjmandi,Lauren T. Ormsbee,Marcus L. Elam,Sara C. Campbell,Nader Rahnama,Mark E. Payton,Ken Brummel-Smith,Bruce P. Daggy 한국식품영양과학회 2014 Journal of medicinal food Vol.17 No.6
The extracts of Scutellaria baicalensis and Acacia catechu have been shown in previous studies to alleviate joint discomfort, reduce stiffness, and improve mobility by reducing the production of proinflammatory molecules over long periods of supplementation. The acute effects of intake of these extracts have not yet been investigated. Thus, we carried out a 1 week clinical trial to examine the extent to which UP446—a natural proprietary blend of S. baicalensis and A. catechu (UP446)—decreases knee joint pain, mobility, and biomarkers of inflammation in comparison to naproxen. Seventy-nine men and women (40–90 years old) diagnosed as having mild to moderate osteoarthritis (OA) consumed either 500 mg/day of the UP446 supplement or 440mg/day of naproxen for 1 week in a double-blind randomized control trial. Pain, knee range of motion (ROM), and overall physical activity were evaluated at the start and at the end of treatment. Fasting blood was collected to determine serum interleukins 1b and 6, tumor necrosis factor-a, C-reactive protein, and hyaluronic acid. The UP446 group experienced a significant decrease in perceived pain (P = .009) time dependently. Stiffness was significantly reduced by both treatments (P= .002 UP446, P = .008 naproxen). Significant increases in mean ROM over time (P = .04) were found in the UP446 group. These findings suggest that UP446 is effective in reducing the physical symptoms associated with knee OA.
THE FIBONACCI LENGTH OF CERTAIN CENTRO-POLYHEDRAL GROUPS
CAMPBELL, C. M.,CAMPBELL, P. P. 한국전산응용수학회 2005 Journal of applied mathematics & informatics Vol.19 No.1
We examine the Fibonacci length of certain centro-polyhedral groups and show that in some cases the lengths depend on tribonacci sequences. Further we obtain specific examples of infinite families of three-generator groups with constant, linear and (3-step) Wall number dependent Fibonacci lengths.
Campbell, S.,Kwok, K.C.S.,Hitchcock, P.A.,Tse, K.T.,Leung, H.Y. Techno-Press 2007 Wind and Structures, An International Journal (WAS Vol.10 No.5
Field measurements of the wind-induced response of two residential reinforced concrete buildings, among the tallest in the world, have been performed during two typhoons. Natural periods and damping values have been determined and compared with other field measurements and empirical predictors. Suitable and common empirical predictors of natural period and structural damping have been obtained that describe the trend of tall, reinforced concrete buildings whose structural vibrations have been measured in the collection of studies in Hong Kong compiled by the authors. This data is especially important as the amount of information known about the dynamic parameters of buildings of these heights is limited. Effects of the variation of the natural period and damping values on the alongwind response of a tall building for serviceability-level wind conditions have been profiled using the gust response factor approach. When using this approach on these two buildings, the often overestimated natural periods and structural damping values suggested by empirical predictors tended to offset each other. Gust response factors calculated using the natural periods and structural damping values measured in the field were smaller than if calculated using design-stage values.
The Fibonacci length of certain centro-polyhedral groups
C. M. Campbell,P. P. Campbell 한국전산응용수학회 2005 Journal of applied mathematics & informatics Vol.19 No.1-2
We examine the Fibonacci length of certain centro-polyhedral groups and show that in some cases the lengths depend on tribonacci sequences. Further we obtain specific examples of infinite families of threegenerator groups with constant, linear and (3-step)Wall number dependent Fibonacci lengths.
S. Campbell,K.C.S. Kwok,P.A. Hitchcock,K.T. Tse,H.Y. Leung 한국풍공학회 2007 Wind and Structures, An International Journal (WAS Vol.10 No.5
Field measurements of the wind-induced response of two residential reinforced concrete buildings, among the tallest in the world, have been performed during two typhoons. Natural periods and damping values have been determined and compared with other field measurements and empirical predictors. Suitable and common empirical predictors of natural period and structural damping have been obtained that describe the trend of tall, reinforced concrete buildings whose structural vibrations have been measured in the collection of studies in Hong Kong compiled by the authors. This data is especially important as the amount of information known about the dynamic parameters of buildings of these heights is limited. Effects of the variation of the natural period and damping values on the alongwind response of a tall building for serviceability-level wind conditions have been profiled using the gust response factor approach. When using this approach on these two buildings, the often overestimated natural periods and structural damping values suggested by empirical predictors tended to offset each other. Gust response factors calculated using the natural periods and structural damping values measured in the field were smaller than if calculated using design-stage values.
Direct observation of a two-dimensional hole gas at oxide interfaces
Lee, H.,Campbell, N.,Lee, J.,Asel, T. J.,Paudel, T. R.,Zhou, H.,Lee, J. W.,Noesges, B.,Seo, J.,Park, B.,Brillson, L. J.,Oh, S. H.,Tsymbal, E. Y.,Rzchowski, M. S.,Eom, C. B. Nature Publishing Group UK 2018 Nature materials Vol.17 No.3
<P>The discovery of a two-dimensional electron gas (2DEG) at the LaAlO3/SrTiO3 interface(1) has resulted in the observation of many properties(2-5) not present in conventional semiconductor heterostructures, and so become a focal point for device applications(6-8). Its counterpart, the two-dimensional hole gas (2DHG), is expected to complement the 2DEG. However, although the 2DEG has been widely observed(9), the 2DHG has proved elusive. Herein we demonstrate a highly mobile 2DHG in epitaxially grown SrTiO3/LaAlO3/SrTiO3 heterostructures. Using electrical transport measurements and in-line electron holography, we provide direct evidence of a 2DHG that coexists with a 2DEG at complementary heterointerfaces in the same structure. First-principles calculations, coherent Bragg rod analysis and depth-resolved cathodoluminescence spectroscopy consistently support our finding that to eliminate ionic point defects is key to realizing a 2DHG. The coexistence of a 2DEG and a 2DHG in a single oxide heterostructure provides a platform for the exciting physics of confined electron-hole systems and for developing applications.</P>
Putting Function into Fashion: Organic Conducting Polymer Fibres and Textiles
Wallace, G.G.,Campbell, T.E.,Innis, P.C. The Korean Fiber Society 2007 Fibers and polymers Vol.8 No.2
Textiles have traditionally been employed over the centuries with great utility in areas as diverse as fashion through to technical textiles. In all these instances the textile itself has been a structural element that once fabricated has limited utility beyond the intended structural and aesthetic application. In recent years there has been a shift towards the incorporation of electronic systems into textile structures. The new paradigm for textiles is the development of systems that not only provide the more traditional aspects of textiles but expands upon this to provide a unique capability to transmit and store information and energy. More importantly these next generation materials will be capable of responding to external stimuli, modifying features of the textile in a direct response to its working environment. A potential route to truly functional electronic textiles is through the application of conducting polymers.
Akshay Mehta,Charles C. Lin,Ronald A. Campbell,Garwin Chin,Michelle H. McGarry,Thay Q. Lee,Gregory J. Adamson 대한정형외과학회 2019 Clinics in Orthopedic Surgery Vol.11 No.1
Background: The purpose of this study was to compare the tibial tunnel aperture contact characteristics simulating an anteromedial and transtibial anterior cruciate ligament (ACL) tunnel preparation. Methods: Seven matched pairs of cadaveric knees were tested. From each knee, a 10-mm quadriceps ACL graft was prepared. The native ACL was arthroscopically removed and tibial tunnels were drilled. In one knee, a transtibial technique was performed with femoral tunnel drilling approached through the tibial tunnel. For the anteromedial technique on the contralateral knee, the posterior tibial tunnel was chamfered with a rasp. The knees were then disarticulated and tibial tunnel aperture geometry was measured. A pressure sensor was placed between the graft and the posterior aspect of the tibial tunnel and the graft was secured with an interference screw. Contact force, contact area, contact pressure, peak contact pressure, hysteresis and stiffness were measured at cyclic loads of 50 N, 100 N, 150 N, and 200 N. Results: Tibial tunnel aperture area, diameter and deviation from a circle were significantly larger with the transtibial technique (p < 0.05). There was no significant difference in hysteresis, stiffness, contact area, contact force and mean contact pressure. The peak contact pressure between the ACL graft and the tibial tunnel was significantly higher with the anteromedial technique for 100 N (p = 0.04), 150 N (p = 0.01), and 200 N (p = 0.002) cyclic loading. Conclusions: Increased peak contact pressure on the graft at the tibial aperture with the anteromedial technique may increase the stress on the graft and possibly lead to failure following ACL reconstruction.
The horned Australian burrowing mayfly Jappa (Ephemeroptera: Leptophlebiidae)
배연재,Kyla J. Finlay,C. CAMPBELL 한국곤충학회 2013 Entomological Research Vol.43 No.1
The horned Australian burrowing mayfly genus Jappa Harker (Leptophlebiidae) is revised based on adult and larval material collected throughout Australia. Five named species [J. campbelli Bae & Finlay, J. edmundsi Skedros & Polhemus, J. furcifera (Eaton), J. serrata Skedros & Polhemus and J. strigata (Eaton 1871) (= J. bicornis Ulmer 1916; = J. kutera Harker 1954, syn. n.)] are recognised, and two new species [J. harkerae n. sp. and J. suteri n. sp.] are described. Descriptions, diagnoses, line‐drawings and images of key characters, distributional information, taxonomic remarks and keys to adults and larvae are provided. The species Jappa tristis Harker 1954 is transferred to the genus Tillyardophlebia Dean.