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Jones Michael,Moran Brendan,Heald Richard John,Bunni John 대한대장항문학회 2024 Annals of Coloproctolgy Vol.40 No.1
Anastomotic and rectal stump leaks are feared complications of colorectal surgery. Diverting stomas are commonly used to protect low rectal anastomoses but can have adverse effects. Studies have reported favorable outcomes for transanal drainage devices instead of diverting stomas. We describe our use of the Heald anal stent and its potential impact in reducing anastomotic or rectal stump leak after elective or emergency colorectal surgery. We performed a single-center retrospective analysis of patients in whom a Heald anal stent had been used to “protect” a colorectal anastomosis or a rectal stump, in an elective or emergency context, for benign and malignant pathology. Intraoperative and postoperative outcomes were reviewed using clinical and radiological records. The Heald anal stent was used in 93 patients over 4 years. Forty-six cases (49%) had a colorectal anastomosis, and 47 (51%) had an end stoma with a rectal stump. No anastomotic or rectal stump leaks were recorded. We recommend the Heald anal stent as a simple and affordable adjunct that may decrease anastomotic and rectal stump leak by reducing intraluminal pressure through drainage of fluid and gas.
Developing a Paradigm to Study and Model the Eutrophication Process in Korean Reservoirs
John R . Jones,Mattew F . Knowlton,Kwang Guk An 한국하천호수학회 1997 생태와 환경 Vol.30 No.5
N/A In the task of quantifying eutrophication and its abatement, Korean limnologists and engineers have the advantage of being able to draw on the theoretical framework, comparative analyses and experimentation of colleagues in other temperate regions. Classical eutrophication theory and global models provide an appropriate framework for this evaluation but modifications may be needed to account for the Korean situation. Korean lakes differ from glacial, temperate lakes in that they are mostly artificially constructed reservoirs, and they experience an annual hydrologic cycle dominated by a summer monsoon. In this essay we address major points of distinction between reservoirs and natural lakes, and between Monsoon and non-monsoon climates that should be considered in this regional assessment. Developing a paradigm to quantify how reservoir water quality responds to monsoon inflow should be an immediate concern because this seasonal event is likely a major source of variation within and among lakes. We suggest that a long-term study of Korea`s reservoir resources be undertaken to provide a data base to better understand existing conditions, construct models, and position scientists to make resource decisions.
Two-step polarization reversal in biased ferroelectrics
Daniels, John E.,Cozzan, Clayton,Ukritnukun, Supphatuch,Tutuncu, Goknur,Andrieux, Jerome,Glaum, Julia,Dosch, Chris,Jo, Wook,Jones, Jacob L. American Institute of Physics 2014 JOURNAL OF APPLIED PHYSICS - Vol.115 No.22
Polarization reversal in polycrystalline ferroelectrics is shown to occur via two distinct and sequential domain reorientation steps. This reorientation sequence, which cannot be readily discriminated in the overall sample polarization, is made apparent using time-resolved high-energy x-ray diffraction. Upon application of electric fields opposite to the initial poling direction, two unique and significantly different time constants are observed. The first (faster time constant) is shown to be derived by the release of a residual stress due to initial electrical biasing and the second (slower time constant) due to the redevelopment of residual stress during further domain wall motion. A modified domain reorientation model is given that accurately describes the domain volume fraction evolution during the reversal process. (C) 2014 AIP Publishing LLC.
CT myelography of the thoraco-lumbar spine in 8 dogs with degenerative myelopathy
Jeryl C.Jones,John H. Rossmeisl,Robert L. Bergman,Tana Wells,Katherine Butler,Karen D. Inzana 대한수의학회 2005 Journal of Veterinary Science Vol.6 No.4
CT myelography of the T11-L2 region was performed in 8 large-breed dogs with a clinical diagnosis of degenerative myelopathy (DM) and 3 large-breed dogs that were clinically normal. CT myelographic characteristics were recorded for each dog, at each disc level. Area measurements of the spinal cord, dural sac, vertebral canal, and vertebral body were recorded at 4 slice locations for each disc level. Mean area ratios were calculated and graphically compared, by slice location and group. In all dogs, CT myelography identified morphologic abnormalities that were not suspected from conventional myelograms. Characteristics observed with higher frequency in DM versus normal dogs were: spinal stenosis, disc protrusion, focal attenuation of the subarachnoid space, spinal cord deformity, small spinal cord, and paraspinal muscle atrophy. Mean spinal cord:dural sac, spinal cord:vertebral canal, dural sac: vertebral canal, and vertebral canal:vertebral body ratios were smaller in DM versus normal dogs at more than one disc level. Some CT myelographic characteristics in DM dogs were similar to those previously reported in humans, dogs and horses with stenotic myelopathy.
Utilizing Expanded Polystyrene (EPS) Blocks for Landslide Mitigation
Kasey D. Jones,Jeffrey A. Young,Dun Can John 한국지반공학회 2011 international journal of geo-engineering Vol.3 No.1
In recent years, expanded polystyrene (EPS) blocks have been utilized for a variety of applications including landslide mitigation. Due to uniform geometry and low unit weight, EPS blocks have proven versatile and cost effective, while at the same time eliminating hazards and construction difficulties associated with other types of lightweight fill materials. This paper describes both the global and internal design methodology as well as installation procedures associated with EPS blocks. Also included is a detailed case study of the Wingert Slide mitigation project. Wingert Slide was an area of historic instability that affected approximately 60 meters of U.S. Highway 287/26 in the Wind River Mountain Range near Togwotee Pass. Togwotee Pass connects Dubois and Jackson Hole, Wyoming and serves as one of the highest traveled thoroughfares from the eastern side of the Rocky Mountains to Grand Teton and Yellowstone National Park. After years of monitoring, the Wyoming Department of Transportation (WYDOT) decided to mitigate the slide area through utilization of EPS blocks. Approximately 2,450 cubic meters of overburden was replaced by the lightweight blocks, thus reducing the driving forces in the slide and consequently increasing stability. This was the first time in WYDOT history that EPS blocks were utilized to mitigate a landslide.
Madeleine Nina Jones,Weranja Ranasinghe,Richard Cetti,Bradley Newell,Kevin Chu,Matthew Harper,John Kourambas,Philip McCahy 대한비뇨의학회 2016 Investigative and Clinical Urology Vol.57 No.4
Purpose: The traditional prone positioning of percutaneous nephrolithotomy (PCNL) is associated with various anesthetic and logistic difficulties. We aimed to compare the surgical outcomes of PCNLs performed using our modified supine position with those performed in the standard prone position. Materials and Methods: A prospective group of 236 renal units (224 patients) undergoing PCNL were included in this 2 site study: 160 were performed in the modified supine position were compared with 76 undergoing PCNL in the prone position. The outcomes of radiation dose, radiation time, stone free rate, body mass index (BMI), stone size, operative time, length of stay (LOS), in hospital and complications were compared. Chi-square and t-tests were used. Results: There were no significant differences in mean radiation time, radiation dose or stone size between the modified supine and prone groups. The supine group had a higher mean BMI (31 kg/m2 vs. 28 kg/m2, p=0.03), shorter mean surgical time (93 minutes vs. 123 minutes, p<0.001), shorter mean LOS (2 days vs. 3 days, p=0.005) and higher stone free rate (70% vs. 50%, p=0.005). There were no differences in septic or bleeding complications but the prone group had a higher rate of overall complications. Conclusions: Modified supine PCNL has significantly lower operative time, shorter LOS and higher stone-free rate compared with prone in our series, while remaining a safe procedure.
Multidisciplinary fingerprints: forensic reconstruction of an insect reinvasion
Kim, Kyung Seok,Jones, Gretchen D.,Westbrook, John K.,Sappington, Thomas W. The Royal Society 2010 Journal of the Royal Society, Interface Vol.7 No.45
<P> An unexpected outbreak of boll weevils, <I>Anthonomus grandis</I> , an insect pest of cotton, across the Southern Rolling Plains (SRP) eradication zone of west-central Texas, USA, was detected soon after passage of Tropical Storm Erin through the Winter Garden district to the south on 16 August 2007. The synchrony and broad geographic distribution of the captured weevils suggest that long-distance dispersal was responsible for the reinvasion. We integrated three types of assessment to reconstruct the geographic origin of the immigrants: (i) DNA fingerprinting; (ii) pollen fingerprinting; and (iii) atmospheric trajectory analysis. We hypothesized the boll weevils originated in the Southern Blacklands zone near Cameron, or in the Winter Garden district near Uvalde, the nearest regions with substantial populations. Genetic tests broadly agree that the immigrants originated southeast of the SRP zone, probably in regions represented by Uvalde or Weslaco. The SRP pollen profile from weevils matched that of Uvalde better than that of Cameron. Wind trajectories supported daily wind-aided dispersal of weevils from the Uvalde region to the SRP from 17 to 24 August, but failed to support migration from the Cameron region. Taken together the forensic evidence strongly implicates the Winter Garden district near Uvalde as the source of reinvading boll weevils. </P>