101
|
Xie J, Sreenivasan S, Korniss G, Zhang W, Lim C, Szymanski BK. Social consensus through the influence of committed minorities. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 84:011130. [PMID: 21867136 DOI: 10.1103/physreve.84.011130] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 04/25/2011] [Indexed: 05/18/2023]
Abstract
We show how the prevailing majority opinion in a population can be rapidly reversed by a small fraction p of randomly distributed committed agents who consistently proselytize the opposing opinion and are immune to influence. Specifically, we show that when the committed fraction grows beyond a critical value p(c) ≈ 10%, there is a dramatic decrease in the time T(c) taken for the entire population to adopt the committed opinion. In particular, for complete graphs we show that when p < pc, T(c) ~ exp [α(p)N], whereas for p>p(c), T(c) ~ ln N. We conclude with simulation results for Erdős-Rényi random graphs and scale-free networks which show qualitatively similar behavior.
Collapse
|
102
|
Zhang W, Lim C, Sreenivasan S, Xie J, Szymanski BK, Korniss G. Social influencing and associated random walk models: Asymptotic consensus times on the complete graph. CHAOS (WOODBURY, N.Y.) 2011; 21:025115. [PMID: 21721793 DOI: 10.1063/1.3598450] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We investigate consensus formation and the asymptotic consensus times in stylized individual- or agent-based models, in which global agreement is achieved through pairwise negotiations with or without a bias. Considering a class of individual-based models on finite complete graphs, we introduce a coarse-graining approach (lumping microscopic variables into macrostates) to analyze the ordering dynamics in an associated random-walk framework. Within this framework, yielding a linear system, we derive general equations for the expected consensus time and the expected time spent in each macro-state. Further, we present the asymptotic solutions of the 2-word naming game and separately discuss its behavior under the influence of an external field and with the introduction of committed agents.
Collapse
|
103
|
Ossovskaya V, Lim C, Schools G, Kalurupalle S, Broude E, Roninson IB. The chemosensitizing properties of iniparib in combination with gemcitabine (G) and carboplatin (C) in OVCAR-3 ovarian adenocarcinoma. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e15532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
104
|
Donovan S, Lim C, Diaz N, Browner N, Rose P, Sudarsky L, Tarsy D, Fahn S, Simon D. Laserlight cues for gait freezing in Parkinson’s disease: An open-label study. Parkinsonism Relat Disord 2011; 17:240-5. [DOI: 10.1016/j.parkreldis.2010.08.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2010] [Revised: 06/07/2010] [Accepted: 08/06/2010] [Indexed: 10/19/2022]
|
105
|
Lee J, Kim H, Han S, Kim S, Lim C, Lee M. P109 Idiopathic granulomatous mastitis; a case series. Breast 2011. [DOI: 10.1016/s0960-9776(11)70053-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
106
|
Lee J, Han S, Lim C, Kang E, Kim SW, Park S, Ahn S, Lee HD, Jeong J, Lee M. P147 The prevalence of ovarian cancer in Korean women at high risk of hereditary breast-ovarian cancer syndrome. Breast 2011. [DOI: 10.1016/s0960-9776(11)70090-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
107
|
Welker TL, Lim C, Yildirim-Aksoy M, Klesius PH. Effect of short-term feeding duration of diets containing commercial whole-cell yeast or yeast subcomponents on immune function and disease resistance in channel catfish, Ictalurus punctatus. J Anim Physiol Anim Nutr (Berl) 2011; 96:159-71. [DOI: 10.1111/j.1439-0396.2011.01127.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
108
|
Lim C, van Gaal W, Burrell L, Testa L, Arnold R, Digby J, Neubauer S, Banning A. Does Troponin Elevation After Percutaneous Coronary Intervention Really Represent Myocardial Infarction? Insights from a Biomarker and MRI Study of Complex PCI. Heart Lung Circ 2010. [DOI: 10.1016/j.hlc.2010.06.969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
109
|
Xu L, Polur I, Lim C, Servais JM, Dobeck J, Li Y, Olsen BR. Early-onset osteoarthritis of mouse temporomandibular joint induced by partial discectomy. Osteoarthritis Cartilage 2009; 17:917-22. [PMID: 19230720 PMCID: PMC2941347 DOI: 10.1016/j.joca.2009.01.002] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Revised: 12/18/2008] [Accepted: 01/05/2009] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The objective of this study is to characterize mouse temporomandibular joint (TMJ) following partial discectomy, since there is no documentation of whether or not partial discectomy can induce early-onset osteoarthritis (OA) in mouse TMJ. METHODS Partial discs of TMJ in mice were removed by microsurgery. Histology was performed to characterize articular cartilages from the TMJ of mice. The morphology of the articular cartilages was evaluated using a modified Mankin scoring system. Immunohistostaining was carried out to examine the expression of discoidin domain receptor 2 (Ddr2), a type II collagen receptor, matrix metalloproteinase-13 (Mmp-13), and Mmp-derived type II collagen fragments in the articular cartilage of condyles from the mouse TMJ. RESULTS Articular cartilage degeneration was seen in the mouse TMJ post-discectomy, including increased proteoglycan staining in the extracellular matrix at 4 weeks, the appearance of chondrocyte clusters at 8 weeks, reduced proteoglycan staining and fibrillation at 12 weeks and the loss of articular cartilage at 16 weeks. Increased immunostaining for Ddr2, Mmp-13, and Mmp-derived type II collagen fragments was detected. CONCLUSION Results indicate that partial discectomy induces early-onset OA in mouse TMJ and that increased expression of Mmp-13, likely due to the elevated expression of Ddr2, may be one of the factors responsible for the early-onset OA in mouse TMJ.
Collapse
|
110
|
Kim S, Lee M, Woo H, Han S, Lim C, Sohn D, Kim E. 0050 Expression of ER, p53 and HER-2/neu in medullary carcinoma and infiltrating ductal carcinoma with medullary feature. Breast 2009. [DOI: 10.1016/s0960-9776(09)70095-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
|
111
|
Wong M, Kong A, Constantine S, Pathi R, Parrish FJ, Verma R, Lim C, Steer C. Radiopathological review of small bowel carcinoid tumours. J Med Imaging Radiat Oncol 2009; 53:1-12. [DOI: 10.1111/j.1754-9485.2009.02031.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
112
|
Shin Y, Lim C, Koh Y, Hong S. Clinical outcome in patients who experienced inhospital cardiac arrest by underlying disease. Crit Care 2009. [PMCID: PMC4083951 DOI: 10.1186/cc7229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
113
|
Chon G, Lim C, Koh Y, Hong S. Effects of systemic steroid in patients with severe community-acquired pneumonia requiring mechanical ventilation. Crit Care 2009. [PMCID: PMC4084216 DOI: 10.1186/cc7494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
114
|
Lim C, Sundkvist T, Nair P, Godward S, Pereira A, Brown G, Bracebridge S. Avian Influenza (H5N1) Outbreak in Suffolk - The Rapid Setup of a Database. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
115
|
Munasinghe S, Ahmed A, Lim C, Rodrigues B, Sundkvist T, Nair P. Knowledge, Risk perception, Poultry workers and Avian influenza. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
116
|
Beddy D, Hyland JMP, Winter DC, Lim C, White A, Moriarty M, Armstrong J, Fennelly D, Gibbons D, Sheahan K. A simplified tumor regression grade correlates with survival in locally advanced rectal carcinoma treated with neoadjuvant chemoradiotherapy. Ann Surg Oncol 2008; 15:3471-7. [PMID: 18846402 DOI: 10.1245/s10434-008-0149-y] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Revised: 08/19/2008] [Accepted: 08/20/2008] [Indexed: 02/06/2023]
Abstract
BACKGROUND Locally advanced rectal cancer is frequently treated with neoadjuvant chemoradiotherapy to reduce local recurrence and possibly improve survival. The tumor response to chemoradiotherapy is variable and may influence the prognosis after surgery. This study assessed tumor regression and its influence on survival in patients with rectal cancer treated with chemoradiotherapy followed by curative surgery. METHODS One hundred twenty-six patients with locally advanced rectal cancer (T3/T4 or N1/N2) were treated with chemoradiotherapy followed by total mesorectal excision. Patients received long-course radiotherapy (50 Gy in 25 fractions) in combination with 5-flourouracil over 5 weeks. By means of a standardized approach, tumor regression was graded in the resection specimen using a 3-point system related to tumor regression grade (TRG): complete or near-complete response (TRG1), partial response (TRG2), or no response (TRG3). RESULTS The 5-year disease-free survival was 72% (median follow-up 37 months), and 7% of patients had local recurrence. Chemoradiotherapy produced downstaging in 60% of patients; 21% of patients experienced TRG1. TRG1 correlated with a pathological T0/1 or N0 status. Five-year disease-free survival after chemoradiotherapy and surgery was significantly better in TRG1 patients (100%) compared with TRG2 (71%) and TRG3 (66%) (P = .01). CONCLUSION Tumor regression grade measured on a 3-point system predicts outcome after chemoradiotherapy and surgery for locally advanced rectal cancer.
Collapse
|
117
|
Lim C, Macaigne G, Boivin JF, Auriaul ML, Deplus R. Colite lymphocytaire associée à la prise de Stalevo®. ACTA ACUST UNITED AC 2008; 32:698-9. [DOI: 10.1016/j.gcb.2008.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2007] [Revised: 02/07/2008] [Accepted: 02/08/2008] [Indexed: 10/22/2022]
|
118
|
Chen WF, Low KH, Lim C, Edery I. Thermosensitive splicing of a clock gene and seasonal adaptation. COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY 2008; 72:599-606. [PMID: 18419319 DOI: 10.1101/sqb.2007.72.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Similar to many diurnal animals, the daily distribution of activity in Drosophila exhibits a bimodal pattern with clock-controlled morning and evening peaks separated by a midday "siesta." In prior work, we showed that the thermosensitive splicing of a 3'-terminal intron in the RNA product from the Drosophila period (per) gene (dper) is critical for temperature-induced adjustments in the timing of evening activity. Cold temperatures enhance the splicing efficiency of this intron (termed dmpi8, Drosophila melanogaster per intron 8), an event that stimulates the daily accumulation of dper RNA and protein, leading to earlier evening activity. Conversely, warm temperatures attenuate dmpi8 splicing efficiency contributing to delayed evening activity, likely ensuring that flies avoid activity during the hot midday sun when they are at increased risk of desiccation. Here, we discuss the underlying molecular mechanisms governing the thermosensitive splicing of dmpi8 and how it contributes to seasonal changes in the daily activity patterns of Drosophila. On a broader perspective, RNA-RNA interactions likely have fundamental roles in the thermal adaptation of life forms to the daily and seasonal changes in temperature.
Collapse
|
119
|
Azhar A, Lim C, Kelly E, O'Rourke K, Dudeney S, Hurson B, Quinlan W. Cost induced by hip fractures. IRISH MEDICAL JOURNAL 2008; 101:213-215. [PMID: 18807812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Hip fracture is the most common fracture in the elderly population. Treating hip fractures is a major burden on the Irish Health system. There is no recent Republic of Ireland study detailing hospital costs for such injuries. A comprehensive analysis of 143 patients admitted with a hip fracture was performed to determine current medical expenditure incurred during acute hospitalization for hip fractures during 2005 in a major university hospital. Costs associated with surgery (implant & theatre costs), laboratory, radiology, physiotherapy and ward were calculated on individual basis. All the hip fractures were above 60 years of age (mean 82 years); average stay in the hospital was 11 days. The mean total hospital expenditure per patient was Euro 9236.01 of which ward costs contributed 55.33%, operative costs 39.82% and investigations 4.83%. The result clearly show that hip fractures have a major economic impact arising from the inpatient treatment, most of which relate to length of hospital stay.
Collapse
|
120
|
Onyiaodike C, Young A, Lim C, Graham A, Freeman D. ABCA1, LDL receptor and STARD3 cholesterol transporter mRNA expression are upregulated in placentae from preeclamptic pregnancies. Atherosclerosis 2008. [DOI: 10.1016/j.atherosclerosis.2008.04.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
121
|
Lah J, Lim C, Suh T. SU-FF-T-219: Evaluation of the Long-Term Stability for the Cylindrical Ionization Chambers. Med Phys 2007. [DOI: 10.1118/1.2760880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
122
|
Frei H, Everts R, von Ammon K, Kaufmann F, Walther D, Schmitz SFH, Collenberg M, Steinlin M, Lim C, Thurneysen A. Randomised controlled trials of homeopathy in hyperactive children: treatment procedure leads to an unconventional study design. Experience with open-label homeopathic treatment preceding the Swiss ADHD placebo controlled, randomised, double-blind, cross-over trial. HOMEOPATHY 2007; 96:35-41. [PMID: 17227746 DOI: 10.1016/j.homp.2006.11.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2006] [Revised: 11/02/2006] [Accepted: 11/06/2006] [Indexed: 11/15/2022]
Abstract
BACKGROUND Treatment of patients with attention deficit hyperactivity disorder (ADHD) with homeopathy is difficult. The Swiss randomised, placebo controlled, cross-over trial in ADHD patients (Swiss ADHD trial) was designed with an open-label screening phase prior to the randomised controlled phase. During the screening phase, the response of each child to successive homeopathic medications was observed until the optimal medication was identified. Only children who reached a predefined level of improvement participated in the randomised, cross-over phase. Although the randomised phase revealed a significant beneficial effect of homeopathy, the cross-over caused a strong carryover effect diminishing the apparent difference between placebo and verum treatment. METHODS This retrospective analysis explores the screening phase data with respect to the risk of failure to demonstrate a specific effect of a randomised controlled trial (RCT) with randomisation at the start of the treatment. RESULTS During the screening phase, 84% (70/83) of the children responded to treatment and reached eligibility for the randomised trial after a median time of 5 months (range 1-18), with a median of 3 different medications (range 1-9). Thirteen children (16%) did not reach eligibility. Five months after treatment start, the difference in Conners Global Index (CGI) rating between responders and non-responders became highly significant (p = 0.0006). Improvement in CGI was much greater following the identification of the optimal medication than in the preceding suboptimal treatment period (p < 0.0001). CONCLUSIONS Because of the necessity of identifying an optimal medication before response to treatment can be expected, randomisation at the start of treatment in an RCT of homeopathy in ADHD children has a high risk of failure to demonstrate a specific treatment effect, if the observation time is shorter than 12 months.
Collapse
|
123
|
Jung Y, Cho Y, Kim J, Suh Y, Oh S, Lim C, Kim M, Park H. P63 Can the histoculture drug response assay (HDRA) predict the clinical results of chemotherapy in breast cancer? Breast 2007. [DOI: 10.1016/s0960-9776(07)70128-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|
124
|
Russell DB, McNamee H, Lim C, Leamy J, de Costa C. 32. EXPERIENCE OF EARLY MEDICAL ABORTION IN A REGIONAL CENTRE. Sex Health 2007. [DOI: 10.1071/shv4n4ab32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Access to abortion services is often severely limited in parts of regional Australia, including north Queensland. In December 2005 one of the authors made a joint application to the Therapeutic Goods Administration (TGA) for approval to prescribe and supply the drug mifepristone (RU486) for the purpose of induced abortion. This was successful, and to date 10 medical abortions using a combination of mifepristone and misoprostol have been carried out.
Clinicians at the Cairns Sexual Health Service have been unable to prescribe mifepristone, but since April 2006 have been using a combination of methotrexate and misoprostol to perform medical abortions up to 9 weeks' gestation. To date 16 have been performed. The mean age of patients undergoing the procedure was 25 (range 17-36) with the indications being for mental health and/or psychosocial reasons. The gestational age at abortion ranged from 4-8 weeks. One woman required a surgical abortion for an unsuccessful medical abortion.
The procedure, whether using mifepristone of methotrexate, is generally well-tolerated and has been shown to be safe. The clinical outcomes will be presented in detail.
Collapse
|
125
|
Kim DY, Lim C, Parasuraman R, Raoufi M, Yoshida A, Arenas J, Denny J, Malinzak L, Almarastani M, Moonka D, Brown K, Sherbondy M, Gordon S, Abouljoud M. Renal Disease Burden Following Liver Transplantation. Transplant Proc 2006; 38:3663-5. [PMID: 17175361 DOI: 10.1016/j.transproceed.2006.10.054] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2006] [Indexed: 02/03/2023]
Abstract
UNLABELLED Significant chronic kidney disease (CKD) occurs following orthotopic liver transplant (OLT). Since CKD is associated with increased cardiovascular events, mortality, and hepatic allograft dysfunction, early recognition of CKD and implementation of changes may improve the long-term outcome. The purpose of this study was to determine the burden of renal disease following OLT. PATIENTS AND METHODS We retrospectively reviewed our OLT recipients from 1997 until 2004. We calculated glomerular filtration rates (GFR) using the Modification of Diet in Renal Disease study (MDRD) method. The GFRs were further subdivided into pre-MELD and post-MELD eras. RESULTS During the study period, we performed 407 OLTs. We censored data from living donor liver transplants (n = 14), combined liver-kidney transplants (n = 12), and from patients whom we did not have complete data for 6 months after transplant (n = 40). Mean MELD score at the time of transplant was 18 +/- 7 (mean +/- standard deviation). The mean GFR at 6 months following OLT was 63.7 +/- 30.2 mL/min per 1.73 m(2). Only 14% (n = 47) of our patients had normal renal function at 6 months, while 78% (n = 266) of our patients had mild to moderate risk for renal failure. Eight percent (n = 28) had stage 4 or 5 CKD. There were no differences between the pre-MELD and post-MELD GFRs. CONCLUSIONS The burden of renal disease is significant in our patient population at 6 months posttransplantation. It may be important to introduce CKD management as early as 6 months after transplant to impact the outcomes of OLT recipients.
Collapse
|