1,815 research outputs found
Dr. Shanesha R.F. Brooks-Tatum, RWWL AUC, July 2011
No full textThis video is a conversation with Dr. Shanesha R.F. Brooks-Tatum. Dr. Brooks-Tatum talks about her book, "The Encyclopedia of Hip Hop Literature." Daniel Le, AUC Woodruff Library, is the interviewer
Letter: R.F. Pettigrew to H.L. Loucks, May 30, 1916
No full textR.F. Pettigrew articulates to H.L. Loucks his distaste for the book that Loucks recommended to him. Pettigrew also mentions that he would prefer to remain distanced from any conference with the author of the book. Pettigrew expresses great admiration and interest in Loucks' manuscript and desire to read it further
The evolution of fat grafting : from soft tissue augmentation to regenerative medicine
No full textThe Author traces the evolution of fat grafting over the years from the first publication in 1893, to the systematization of the technique thanks to the contribution of Sydney Coleman. In recent years studies on the nature of adipose tissue have shown that besides multiple resident cells, fat tissue contains stem cells (ADSCs) capable of differentiating in multiple lineages, such as bone, cartilage, muscle, nerve, etc. Thus, in addition to the traditional notion that fat is a high energy reservoir, it becomes apparent that fat is a repair organ providing the basis for soft tissue regeneration. Manipulation of ADSCs promises to affect different fields of medicine and provide the physician with a variety of regenerative medical therapies
An evaluation of the factors that determine carrier selection
No full textThe selection of freight transport mode in cities like Hong Kong, with little land, is in some
respects obvious. The deciding criterion for mode/carrier selection is based on the selection
of either the lowest total transport cost or the shortest transit time for the cargo. The peculiar
nature of each transport mode, namely; rail, sea, road and air, will definitely earn their own
places when shippers need to make a decision on their shipments. The nature of the cargo
will also affect the choice of carrier/mode when they are transported in break bulk.
Fortunately, the invention of ISO containers in the late 1950s eliminated and overcame the
shortfall in some transport modes. With the extensive usage of ISO containers hereafter,
shippers can now enjoy a much freer choice of transport mode.
When China started its open-door policy in the late 1970s, many local (Hong Kong)
manufacturers relocated their factories to the Pearl River Delta (PRD) due to the low labour
and land costs. Delivery of shipments was mainly carried out by Hong Kong freight
forwarders as they had been in business with the shippers for decades. Road transport was the
only mode choice available at that time due to the inflexibilities in other transport modes such
as sea and rail. Progressively, these factories were relocated northwards at a later time due to
the gradually increasing labour and land costs. Freight forwarders were then faced with a
prolonged delivery time due to the stringent Customs regulations in China as well as a
progressive increase in the physical distance between the factory and the loading port in
Hong Kong. The continuous developments in adjacent ports in Southern China offered
freight forwarders an opportunity to revise the route of consignments so that the lowest cost
and shortest transit times were achievable. Nowadays, consignments from the PRD region can be transported to the loading ports via at least three transport modes, namely, sea (barge),
road (truck) and rail.
In addition to physical constraints in the mode/carrier selection, the mode choice in China is
further complicated due to the inflexible Customs regulations and government policies on tax
rebates.
Considerable research has been done on mode and carrier selection for bulk cargo in Western
countries. However there is no explicit study on the mode choice in China. This thesis studies
factors that will affect the shippers’ mode/carrier choice and ascertains the unique key factors
that will affect their mode/carrier choice in the PRD for their overseas consignments. From
this study, it was observed that shippers irrespective of the consignment size and cargo value
prefer to use a loading port that is reliable and efficienct in operation. This is the first thesis
written about carrier mode choice in China applying systematic and rationale methods to
express the mode selection criteria in PRD area. The results were achieved by using the
pairwise comparison method - Analytical Hierarchy Process (AHP) method so that rigidity of
the results is academically accepted. Nevertheless, further study on the mode choice can be
carried forward through assessing buying behaviour and the shipper-carrier relationship
Low-frequency model-order reduction of electromagnetic fields without matrix factorization
No full textElectrical Engineering, Mathematics and Computer Scienc
In memory of Paul Tessier, MD (1917-2008)
No full textThe Author traces the life and the surgical achievements of Paul Tessier, founder of craniofacial surgery
Old and new in fat grafting
No full textThe author traces the evolution of fat grafting over the years and shows the potential clinical applications in the different areas of the body
Presentazione
No full textThe Author traces the evolution of Aesthetic Rhinoplasty in Italy from the first contribution published by G. Sanvenero Rosselli in 1931
High Accuracy Terrestrial Positioning Based on Time Delay and Carrier Phase Using Wideband Radio Signals
No full textAccurate position solutions are in high demand for many emerging applications. Global navigation satellite systems (GNSS), however, may not meet the required positioning performance, especially in urban environments, due to multipath and weak received power of the GNSS signal that can be easily blocked by surrounding objects. To achieve a high ranging precision and improve resolvability of unwanted reflections in urban areas, a large signal bandwidth is required. In this thesis, a terrestrial positioning system using a wideband radio signal is developed as a complement to the existing GNSS, which can provide a better ranging accuracy and higher received signal power, compared to GNSS. In the terrestrial positioning system presented in this thesis, a wideband ranging signal is implemented by means of a multiband orthogonal frequency division multiplexing (OFDM) signal. All transmitters are synchronized by time and frequency reference signals, which are optically distributed through the white-rabbit precision time protocol (WR-PTP). Like in GNSS, the to-be-positioned receiver is not synchronized to the transmitters. Positioning takes place through range measurements between a number of transmitters and the receiver. Time delay and carrier phase are to be estimated from the received radio signal, which propagated through a multipath channel. This estimation is done on the basis of the channel frequency response and using the maximum likelihood principle. To determine whether or not reflections need to be considered in the estimation model, a measure of dependence is introduced to evaluate the change of the precision (i.e., variance), and the measure of bias is introduced to assess the bias of the estimator when the reflection is not considered. Also, a methodology is proposed for sparsity-promoting ranging signal design in this thesis. Based on a multiband OFDM signal, ranging signal design comes to sparsely select as few signal bands as possible. Using fewer signal bands for ranging leads to less computational complexity in time delay and carrier phase estimation, while the ranging performance can still benefit from a large virtual signal bandwidth, which is defined by the entire bandwidth between the two signal bands at the spectral edges. It is proposed to use the Cramér-Rao lower bound (CRLB) of time delay estimation, the measure of dependence, and the measure of bias as constraints in ranging performance, and formulate an optimization problem to design a sparse multiband signal.Mathematical Geodesy and Positionin
Depolarization and decreased surface expression of K+ channels contribute to NSAID-inhibition of intestinal restitution
No full textNon-steroidal anti-inflammatory drugs (NSAIDs) contribute to gastrointestinal ulcer formation by inhibiting epithelial cell migration and mucosal restitution; however, the drug-affected signaling pathways are poorly defined. We investigated whether NSAID inhibition of intestinal epithelial migration is associated with depletion of intracellular polyamines, depolarization of membrane potential (Em) and altered surface expression of K+ channels. Epithelial cell migration in response to the wounding of confluent IEC-6 and IEC-Cdx2 monolayers was reduced by indomethacin (100μM), phenylbutazone (100μM) and NS-398 (100μM) but not by SC-560 (1μM). NSAID-inhibition of intestinal cell migration was not associated with depletion of intracellular polyamines. Treatment of IEC-6 and IEC-Cdx2 cells with indomethacin, phenylbutazone and NS-398 induced significant depolarization of Em, whereas treatment with SC-560 had no effect on Em. The Em of IEC-Cdx2 cells was: −38.5±1.8mV under control conditions; −35.9±1.6mV after treatment with SC-560; −18.8±1.2mV after treatment with indomethacin; and −23.7±1.4mV after treatment with NS-398. Whereas SC-560 had no significant effects on the total cellular expression of Kv1.4 channel protein, indomethacin and NS-398 decreased not only the total cellular expression of Kv1.4, but also the cell surface expression of both Kv1.4 and Kv1.6 channel subunits in IEC-Cdx2. Both Kv1.4 and Kv1.6 channel proteins were immunoprecipitated by Kv1.4 antibody from IEC-Cdx2 lysates, indicating that these subunits co-assemble to form heteromeric Kv channels. These results suggest that NSAID inhibition of epithelial cell migration is independent of polyamine-depletion, and is associated with depolarization of Em and decreased surface expression of heteromeric Kv1 channels.ID: S0006295207001931; M3: Article; Accession Number: S0006295207001931; Author: L.C. Freeman (b); Author: D.F. Narvaez (a); Author: A. McCoy (a); Author: F.B. von Stein (c); Author: S. Young (b); Author: K. Silver (a); Author: S. Ganta (b); Author: D. Koch (b); Author: R. Hunter (b); Author: R.F. Gilmour (c); Author: J.D. Lillich (a, ⁎); Affiliation: Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Anatomy and Physiology, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, United States; Keyword: Non-steroidal anti-inflammatory drugs; Keyword: Intestinal epithelial cells; Keyword: Membrane potential; Keyword: Potassium channels; Number of Pages: 12; Language: English;Source type: Electronic(1)http://search.ebscohost.com/login.aspx?direct=true&db=edselp&AN=S0006295207001931&site=eds-live&scope=sit
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