LCD Panel에서 Dynamic Global Backlight Dimming을 위한 Optimal Power Control Algorithm의 개발

MasterIn today’s trend of energy saving and environment protection, reducing the power consumption of consumer products has become a major concern during their design process. Since LCD is a dominant technology in the display market, this technology is not an exception to this rule. In the whole system, as the backlight is the part of the LCD panel that consumes the most of power, researches have been mainly focused on reducing its power consumption. However, reducing the power consumption of the panel by lowering the backlight brightness is not a simple task since it also means reducing the overall brightness of the displayed image.This thesis first presents two dynamic backlight dimming methods that enable to reduce the power consumption of the LCD panel by considering the input image characteristics. Indeed, these methods enable to reach a good compromise between power reduction and image quality preservation. Then, both methods are compared and the best one is designed and tested in hardware using Verilog HDL for FPGA implementation. Furthermore, research on the clipping perception is performed in order to model the distribution of the clipped pixels in a more accurate way than the PSNR metric, which was used to evaluate the performances of the two proposed methods

Cancer et VIH : actualités 2017

International audienceSince the era of combined antiretroviral therapy, life expectancy of people living with HIV has been improved and is associated with a change in causes of death. Cancer, both AIDS-defining or non-AIDS-defining cancers, has become the leading cause of death in people living with HIV associated with an increase in the incidence of some cancers compared to the general population. Epidemiology and the identification of risk factors is a crucial issue, particularly to determine the most appropriate prevention and screening strategies in this population. In the absence of dedicated clinical trials, the cancer management in these patients is based on general recommendations, with specific attention to comorbidities and drug interactions. In addition, the development of new innovative therapies such as immunotherapy with inhibitory antibodies of immune checkpoints receptor represents a hope for the patient care, both infected or not with HIV. In this context, the establishment of the national network CancerVIH makes sense, allowing the establishment of multi-disciplinary consultation meetings involving all the practitioners involved in the care of these patients with cancer, as well as the constitution of a national cohort and the promotion of dedicated trials, to improve and optimize the management for these patients

Immunotherapy for cancer in people living with HIV: safety with an efficacy signal from the series in real life experience

International audienceObjective: To report efficacy and tolerance of nivolumab or pembrolizumab, PD-1 inhibitors, in people living with HIV (PLWHIV) and cancer.Design: Series of PLWHIV cancer patients treated with anti-PD1 agents in real-life clinical practice.Methods: From May 2014 to January 2019, 575 HIV-infected patients have been discussed in the French CANCERVIH national multidisciplinary board and included in the network database. Twenty-three patients were treated with immune checkpoint inhibitors in daily practice. We report the demographic characteristics, CD4+ T-cell counts, HIV viral loads, safety and efficacy data of these 23 PLWHIV treated in routine practice with nivolumab or pembrolizumab for nonsmall cell lung cancer (n = 21), melanoma (n = 1) and head and neck cancer (n = 1) retrospectively collected from the database CANCERVIH network. The median CD4+ T-cell count at treatment initiation was 370 cells/μl (IQR: 125–1485). HIV viral load was undetectable in all patients.Results: As of 29 April 2019, with a median follow-up of 10.8 months (2.0–27.7), the median number of injections was 6 (IQR: 4–18). Only two grade 3 adverse reactions were reported (no toxic deaths or immune-related deaths). Among the 23 patients, a partial response was observed in five patients (22%), a stabilization for five (22%) and a progression in 13 (57%). Only one patient experienced a positive HIV viral load, but this occurred following ART interruption.Conclusion: Treatment with PD-1 inhibitors seems to have an efficacy signal and be well tolerated in PLWHIV, including impact on CD4+ lymphocyte count and HIV load, that should be monitored during treatment course (regarding real-life experience)

First-Line Carboplatin Plus Pemetrexed with Pemetrexed Maintenance in HIV+ Patients with Advanced Non-Squamous Non-Small Cell Lung Cancer: The Phase II IFCT-1001 CHIVA Trial

International audiencePurpose HIV infection is an exclusion criterion in lung cancer trials. This multicenter phase II trial aimed to assess feasibility, efficacy and safety of first-line carboplatin plus pemetrexed (CaP) followed by pemetrexed (P) maintenance in people living with HIV (PLHIV) with advanced non-squamous non-small cell lung cancer (NS-NSCLC). Methods Four cycles of CaP were followed by P-maintenance therapy in patients with Eastern Cooperative Oncology Group performance status (PS) ≤2. The primary objective was a disease control rate (DCR) ≥30% after 12 weeks. Results Of the 61 PLHIV enrolled 49 (80%) had a PS 0–1, 19 (31%) brain metastases. Median CD4 lymphocyte count was 418 cells·µL −1 (range: 18–1230), median CD4 lymphocyte nadir 169.5 cells·µL −1 (1–822); 48 patients (80%) were virologically controlled. Four-cycle inductions were achieved by 38 patients (62%), and 31 (51%) started P maintenance [median of 4.1 cycles (range: 1–19)]. The 12-week DCR was 50.8% (95%CI: 38.3;63.4) and partial response rate 21.3%. Median PFS and OS were respectively 3.5 (95%CI: 2.7;4.4) and 7.6 months (5.7;12.8). Patients with PS 0–1 had the longest median PFS (4.3 months, 95%CI: 3.1;5.2) and OS (11.9 months, 95%CI: 6.4;14.3). During induction, CaP doublet was well tolerated apart from grade 3–4 hematologic toxicities (neutropenia, 53.8%; thrombocytopenia, 35.0%; anemia, 30.0%). Two fatal treatment-related sepsis were reported. No opportunistic infections were experienced. Conclusion In PLHIV with advanced NS-NSCLC, first-line 4-cycle CaP induction followed by P maintenance was effective and reasonably well-tolerated. Further studies should evaluate combination strategies of CaP with immunotherapy in PLHIV

Protease inhibitors exposure is not related to lung cancer risk in HIV smoker patients: a nested case-control study

International audienceOBJECTIVE: We aimed at assessing in persons living with HIV with a smoking history an association between lung cancer risk and protease inhibitors exposure, especially ritonavir. DESIGN: A nested case-control study was conducted within the ANRS CO4 FHDH, CO3 Aquitaine and Tenon's Hospital Cohorts. METHODS: Cases and controls were eligible if they were ex-smokers or current smokers at the index date, and had a CD4 cell count reported in the year preceding the index date. Cases were incident cases of lung cancer diagnosed between 1 January 2000 and 31 December 2011. All cancer cases were validated and histological types identified when available. Three controls were randomly selected by incidence density sampling using calendar time as the time axis, with individual matching on cohort, age (± 5 years), route of HIV acquisition, sex and hospital. Analyses were performed using conditional logistic regression adjusted for nadir CD4 cell count and smoking status. Ritonavir and protease inhibitors exposures were represented in separate models using categorical variables (never exposed, ever exposed). Several sensitivity analyses were performed. RESULTS: This study performed in 1447 persons living with HIV with a smoking history (383 lung cancer cases and 1064 control patients) did not evidence any association between lung cancer risk and protease inhibitors exposure including ritonavir. CONCLUSION: These results suggest that the risk of lung cancer is not influenced by pharmacologically induced P450 cytochrome protease inhibitors inhibition among smokers or ex-smoker

Assessment of nivolumab in HIV-Infected patients with advanced non-small cell lung cancer after prior chemotherapy. The IFCT-1602 CHIVA2 phase 2 clinical trial

International audienceTherapies targeting immune checkpoints, such as the programmed cell death 1 (PD-1) receptor, have become the standard-of-care for patients with non-small cell lung cancer (NSCLC), but people living with HIV (PLWH) were excluded from these studies.EudraCT.ema.europa.eu registration number: 2016-003796-22