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Erlikhman G, Ghose T, Kellman P. Contours and Surfaces Affect Stereoscopic Depth Perception in Dynamically Specified Displays. J Vis 2012. [DOI: 10.1167/12.9.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Erlikhman G, Ghose T, Kellman P. Spatiotemporal contour interpolation in four dimensions. J Vis 2011. [DOI: 10.1167/11.11.1046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Ghose T, Liu Z. View propagation in internal object memory representation. J Vis 2011. [DOI: 10.1167/11.11.892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Ghose T, Swendeman DT, George SM. The role of brothels in reducing HIV risk in Sonagachi, India. QUALITATIVE HEALTH RESEARCH 2011; 21:587-600. [PMID: 21266706 DOI: 10.1177/1049732310395328] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
High rates of empowerment, HIV-related knowledge, and condom use among sex workers in Sonagachi, India have been attributed to a community-led intervention called the Sonagachi HIV/AIDS Intervention Program (SHIP). In this research we examined the crucial role of brothels in the success of the intervention. In-depth, semistructured interviews were conducted with 55 participants of SHIP. The results indicate that brothels help sex workers reduce HIV risk by (a) serving as targeted sites for SHIP's HIV intervention efforts, (b) being operated by madams (women managers of brothels) who participate in SHIP's intervention efforts and promote healthy regimes, (c) structuring the economic transactions and sexual performances related to sex work, thus standardizing sex-related behavior, and (d) promoting community empowerment among brothel residents. Implications of these results are discussed for future efforts to replicate SHIP's success in other sex work communities.
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Ghose T, Liu J, Kellman P. Recovering metric object properties through spatiotemporal interpolation: What is the size of an object that is never present in the stimulus? J Vis 2010. [DOI: 10.1167/9.8.911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Ghose T, Palmer S. Gradient cut alignment: A cue to ground in figure-ground and depth perception. J Vis 2010. [DOI: 10.1167/7.9.903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Palmer S, Ghose T. Extremal edges dominate other cues to figure-ground organization. J Vis 2010. [DOI: 10.1167/6.6.96] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Ghose T, Palmer S. Edge alignment effects for gradient cuts in figure-ground organization. J Vis 2010. [DOI: 10.1167/8.6.1013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Ghose T, Hillis JM, Watt SJ, Landy MS, Banks MS. Slant anisotropy and tilt-dependent variations in stereo precision. J Vis 2010. [DOI: 10.1167/3.9.80] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Zhang ZL, Ghose T, Schor CM. Temporal limit of the smoothness constraint for binocular matching. J Vis 2010. [DOI: 10.1167/3.9.319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Ghose T, Banks M, Hillis J. Eye dominance changes with eye position and image magnification. J Vis 2010. [DOI: 10.1167/2.7.326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Ghose T, Swendeman D, George S, Chowdhury D. Mobilizing collective identity to reduce HIV risk among sex workers in Sonagachi, India: the boundaries, consciousness, negotiation framework. Soc Sci Med 2008; 67:311-20. [PMID: 18455855 DOI: 10.1016/j.socscimed.2008.03.045] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2007] [Indexed: 10/22/2022]
Abstract
The significantly low rate of HIV infection and high rate of condom use among sex workers in Kolkata, India is partially attributable to a community-led structural intervention called the Sonagachi Project which mobilizes sex workers to engage in HIV education, formation of community-based organizations and advocacy around sex work issues. This research examines how Sonagachi Project participants mobilize collective identity and the manner in which collective identity influences condom use. Using purposive sampling methods, 46 Sonagachi Project participants were selected in 2005 for in-depth qualitative interviews. Taylor and Whittier's (Taylor, V & Whittier, N (1992). Collective identities in social movement communities: lesbian feminist mobilization. In A. Morris & C. Mueller (Eds.) Frontiers in social movement theory. New Haven, CT: Yale University Press) model of identity-formation through boundaries, consciousness and negotiation was used to interpret results. Subjects mobilized collective identity by (1) building boundaries demarcating in-group sex workers from out-group members, (2) raising consciousness about sex work as legitimate labor and the transformative change that results from program participation, and (3) negotiating identity with out-group members. This research establishes a conceptual link between the boundaries, consciousness and negotiation framework of collective identity mobilization and condom use. Condom use among sex workers is motivated by each element of the boundaries, consciousness and negotiation model: condoms mark boundaries, enunciate the consciousness that sex with clients is legitimate labor, and help negotiate the identity of sex workers in interactions with clients.
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Ghose T. Organizational- and individual-level correlates of posttreatment substance use: a multilevel analysis. J Subst Abuse Treat 2007; 34:249-62. [PMID: 17600654 DOI: 10.1016/j.jsat.2007.04.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2006] [Revised: 04/02/2007] [Accepted: 04/05/2007] [Indexed: 11/18/2022]
Abstract
In addressing the need to study the effects of organizational factors on individual-level treatment outcomes, this study used hierarchical models to examine the organizational- and individual-level correlates of posttreatment substance use. Risk for posttreatment use varied significantly across organizations. Factors in the external institutional environment of facilities significantly influenced risk for use: managed care regulation increased the risk, whereas Joint Commission on the Accreditation of Healthcare Organizations accreditation decreased it (p < .01 for both). On the individual level, longer treatment episodes and treatment completion reduced the risk (p < .01 for both) after controlling for client characteristics. The benefits of length of stay in treatment were modified by elements of the external institutional environment and organizational treatment technology. The ameliorative effects of prolonged treatment were reduced by higher levels of managed care regulation, organizational monitoring, caseload size (p < .01 for all), and proportion of degreed staff (p < .05). The results highlight the influence of organizational factors on posttreatment use.
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Ghose T, Palmer SE. Surface convexity and extremal edges in depth and figure-ground perception. J Vis 2005. [DOI: 10.1167/5.8.970] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Sapra R, Kaul U, Gupta RK, Kachru R, Ghose T, Sharma S, Parida AK, Samal MP, Singh B. Delayed occurrence of restenosis in drug eluting stents: an evidence of delayed healing. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2005; 53:483-5. [PMID: 16124361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Drug eluting stents have made a significant impact on restenosis. However, there are concerns regarding delayed "catch-up" of restenosis. In this case report we present two such patients with delayed occurrence of restenosis after drug eluting stent implantation.
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Sapra R, Kaul U, Singh B, Sudan D, Isser HS, Ghose T, Kachru R. Coronary stent implantation without lesion predilatation (direct stenting): our experience with this evolving technique. Indian Heart J 2001; 53:308-13. [PMID: 11516029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
BACKGROUND Until recently, conventional intracoronary stent deployment required predilatation of the lesion with a balloon. However, "direct stenting" of the lesion without predilatation offers certain theoretical and practical advantages. We assessed the safety and feasibility of direct stenting in a select group of patients who were likely to benefit most from these advantages, namely, those with acute coronary syndromes. saphenous vein graft lesions, associated renal or left ventricular dysfunction and those requiring multivessel intervention. METHODS AND RESULTS After direct stenting, intravascular ultrasound was used to assess the adequacy of stent expansion in 51 patients. One hundred and twenty patients with a total of 125 lesions (83.3% males, average age 54.6+/-12.4 years) were enrolled for direct stenting. Of these, 90% of patients had presented with acute coronary syndromes, 21.6% of patients had associated moderate-to-severe left ventricular systolic dysfunction, 6.7% of patients had associated renal dysfunction and 30.8% of patients required multivessel intervention. Angiographically visible thrombus was present in 35.2% of patients. The mean reference diameter of the lesion was 3.18+/-0.32 mm and mean percentage diameter stenosis was 76.4+/-11.2%. Almost all varieties of stents were used (8.8% bare and 91.2% mounted). Procedural success was achieved in 98.3% of patients (98.4% of lesions). In two cases, the lesion had to be predilated prior to stenting. On angiography, the need for postdilatation of the stent was apparent in 29 (23.6%) lesions. In contrast, on intravascular ultrasound evaluation done in 51 lesions after stent deployment, the need for postdilatation to optimize stent expansion was seen in 43 (84.3%) lesions. There was one instance of acute stent thrombosis and two instances of slow-flow phenomenon. There were no deaths, myocardial infarction or need for urgent bypass surgery. CONCLUSIONS We conclude that direct stenting is feasible and safe in selected groups of patients. Optimization of stent expansion after direct stenting may often require aggressive postdilatation.
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Kaul U, Singh B, Sudan D, Sapra R, Kachru R, Ghose T, Dixit NS. Multi-vessel coronary stenting--procedural results and late clinical outcomes: a comparison with single-vessel stenting. THE JOURNAL OF INVASIVE CARDIOLOGY 2000; 12:410-5. [PMID: 10953105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The purpose of this study was to assess the 1-year clinical outcome of patients with multi-vessel coronary artery disease (CAD) who underwent coronary stenting, and to compare the results with single-vessel coronary stenting carried out during the same period. We evaluated the in-hospital and 12-month clinical outcomes [death, Q-wave myocardial infarction (MI) and repeat revascularization rates at one year] in 384 consecutive patients treated with coronary stents in 2 (92% of patients) or 3 of the native coronary arteries and compared the outcome to 624 consecutive patients undergoing stenting in a single coronary artery between January 1, 1997 and January 31, 1999. The overall procedural success was obtained in 99% of patients with 2- or 3-vessel stenting and 98% of patients with single-vessel stenting. Procedural complications were similar (2.9% vs 2.6%; p = 0.12). During follow-up, target lesion revascularization was 16% in multi-vessel and 14% in single-vessel stenting (p = 0.38) and repeat revascularization was also similar for both groups (19% vs. 20%; p = 0.73). There was no difference in death (0.8% vs. 1.3%; p = 0.31) and Q-wave MI (0.7% vs. 1.4%; p = 0. 16) in the 2 groups. Overall cardiac event-free survival was similar for both groups (76% vs. 78%; p = 0.54). Multi-vessel stenting in carefully selected patients in our experience had a high procedural success with very low complication rates. The one-year clinical outcomes were acceptable and were similar to the results of single-vessel stenting.
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Sapra R, Ghose T, Sudan D, Singh B, Kaul U, Wasir HS. Exceptional survival of a patient with ventricular septal defect and Eisenmenger syndrome. Indian Heart J 1999; 51:555-7. [PMID: 10721652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
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Kaul U, Shawl F, Singh B, Sudan D, Sapra R, Ghose T, Dixit NS. Percutaneous transluminal myocardial revascularization with a holmium laser system: Procedural results and early clinical outcome. Catheter Cardiovasc Interv 1999; 47:287-91. [PMID: 10402278 DOI: 10.1002/(sici)1522-726x(199907)47:3<287::aid-ccd5>3.0.co;2-o] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Surgical transmyocardial laser revascularization has been reported to improve clinical outcome in patients with refractory angina who are not candidates for angioplasty or bypass surgery. We investigated the feasibility and safety of a nonsurgical, percutaneous technique for laser channel creation using energy from a holmium:yttrium-aluminium-garnet (YAG) laser. The laser energy was directed through a fiber enclosed in a catheter to the ventricular myocardium creating channels between the blood pool and the myocardium. Thirty-five patients with angina and coronary anatomy not amenable to revascularization with coronary angioplasty or bypass surgery underwent percutaneous transluminal myocardial revascularization. A total of 15 +/- 5 channels were formed per patient. There was no procedure-related mortality. One patient developed cardiac tamponade requiring thoracotomy and another a minor self-limiting pericardial effusion. There was no worsening of regional wall motion function in any patient. All patients were discharged alive after a postprocedure hospital stay of 2.1 +/- 1.4 days. Mean Canadian Cardiovascular Society (CCS) functional class declined from 3.68 +/- 0.4 before procedure to 0.82 +/- 0.7 at 30 days (P < 0.01). At 3 months, mean angina class was 0.94 +/- 0.65 (n = 35; P < 0.01) and at 6 months, mean angina class was 1.08 +/- 0.58 (n = 26; P < 0.01). One patient required repeat revascularization after 5 months for progression of disease in a degenerated saphenous venous graft supplying different region of myocardium. We conclude that transmyocardial revascularization using holmium:YAG laser by percutaneous technique can be carried out safely with encouraging early results and a very low complication rate. The symptomatic relief seen up to 6 months has been excellent. The long-term effects of this technique on mortality and relief of angina, however, remain to be defined. Cathet. Cardiovasc. Intervent. 47:287-291, 1999.
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Ghose T, Kaul U. Reciprocal ST segment changes in acute pancreatitis simulating acute myocardial infarction. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 1999; 47:743-4. [PMID: 10778604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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Kaul U, Singh B, Sudan D, Sapra R, Yadav RD, Ghose T, Dixit NS. Primary stenting in acute myocardial infarction: a 30-day follow up study. Catheter Cardiovasc Interv 1999; 46:4-10. [PMID: 10348556 DOI: 10.1002/(sici)1522-726x(199901)46:1<4::aid-ccd2>3.0.co;2-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Primary coronary stenting is being increasingly used in patients undergoing primary coronary angioplasty for acute myocardial infarction. In this prospective study we evaluated our experience of direct angioplasty in 68 patients with acute myocardial infarction of whom 57 received intracoronary stents using high-pressure deployment (> or =12 atmospheres) with adjunct aspirin and ticlopidine therapy without coumadin. All patients underwent pre-discharge follow-up angiography. Stent implantation was successful in all patients. Stent thrombosis was not seen in any patient. However, TIMI grade 3 flow was obtained in only 51 patients (89.6%) with evidence of slow flow present in remaining six patients. Follow-up angiograms showed no stent thrombosis but five out of the six patients (83%) with slow-flow phenomenon persisted to have slow flow. These patients had lower left ventricular ejection fraction as compared to patients with TIMI 3 flow at follow-up angiography (27.5 +/- 10.2% vs. 42.1 +/- 15.2%, P < .001) and a high mortality (two out of six) within 30 days. Primary stenting is safe and feasible in the majority of patients with good short-term outcomes, but persistent slow-flow phenomenon with adverse clinical outcome is seen in a small but significant number of patients.
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Sapra R, Kaul U, Singh B, Sudan D, Yadav RD, Ghose T. Simplified approach of cannulating anomalously arising right coronary artery from left sinus of Valsalva. CATHETERIZATION AND CARDIOVASCULAR DIAGNOSIS 1998; 45:346-7. [PMID: 9829902 DOI: 10.1002/(sici)1097-0304(199811)45:3<346::aid-ccd29>3.0.co;2-e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kaul U, Singh B, Sudan D, Sapra R, Mittal B, Dev Yadav R, Ghose T, Dixit NS. Outcomes of primary stenting for acute myocardial infarction. Indian Heart J 1998; 50:402-8. [PMID: 9835199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
Primary coronary stenting is being increasingly used in patients undergoing primary coronary angioplasty for acute myocardial infarction. In this prospective study we analysed our experience of direct angioplasty in 76 patients with acute myocardial infarction of whom 65 received intracoronary stents using high pressure deployment (> or = 12 atm) with adjunctive aspirin and ticlopidine therapy but without coumadin. All patients underwent pre-discharge angiography. Stent implantation was successful in all patients. Stent thrombosis was not seen in any patient. However, TIMI grade 3 flow was obtained in only 58 (89.2%) patients with evidence of slow-flow present in the remaining seven patients. Pre-discharge angiograms showed no-stent thrombosis but five out of the seven (71%) patients with slow-flow phenomenon persisted to have slow-flow. These patients had lower left ventricular ejection fraction as compared to patients with TIMI 3 flow at pre-discharge angiography (27.5 +/- 10.2% vs 42.1 +/- 15.2%; p < 0.001) and a high mortality (2 out of 7) within 30 days. Primary stenting is safe and feasible in the majority of patients with good short-term outcome. But persistent slow-flow phenomenon with adverse clinical outcome is seen in a small but significant number of patients.
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Kaul U, Singh B, Vijan V, Sudan D, Ghose T. Rotablation-induced coronary perforation during management of in-stent restenosis. Indian Heart J 1998; 50:203-5. [PMID: 9622991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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