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| 1 | Thermal diffusivity measurements on ternary Ge–Te–Tl glasses using Photo-thermal Deflection method: Effect of thallium addition显示文摘 | Mohammad Mahbubur Rahman K. Rukmani Rajam Sekhar S. Asokan | 2012 | Journal of Non-Crystalline Solids (-)2012，，12： | 1 |
| 2 | Design of an automated secure garage sys- tem using license plate recognition technique显示文摘 | Afaz Uddin Ahmed Taufiq Mahmud Masum Mohammad Mahbubur Rahman | 2014 | International Journal of Intelligent Systems and Applications2014，6，2： | 1 |
| 3 | Impact of lockdown relaxation and implementation of the facecovering policy on mental health: A United Kingdom COVID-19 study显示文摘BACKGROUND Pandemic mitigation policies,such as lockdown,are known to impact on mental health of individuals.Compulsory face covering under relaxed lockdown restrictions gives assurance of less transmission of airborne infection and has the potential to improve mental health of individuals affected by restrictions.AIM To examine the association of the lockdown relaxation and the implementation of the face covering policy on the mental health of the general population and subgroups in the United Kingdom using interrupted time series model.METHODS Using a web-based cross-sectional survey of 28890 United Kingdom adults carried out during May 1,2020 to July 31,2020,changes in mental health status using generalised anxiety disorder(GAD-7),and impact of events scale-revised(IES-R)scales are examined,at the dates of the first lockdown relaxation(July 4,2020)and the subsequent introduction of face covering(July 24,2020)in United Kingdom.A sharp regression discontinuity design is used to check discontinuities in mental health outcomes at policy-change dates.RESULTS Average GAD-7 scores of participants were 5.6,5.6 and 4.3 during the lockdown period,the lockdown relaxation phase and the phase of compulsory face covering,respectively,with lower scores indicating lower anxiety levels.Corresponding scores for IES-R were 17.3,16.8 and 13.4,with lower scores indicating less distress.Easing lockdown measures and subsequent introduction of face covering,on average,reduced GAD-7 by 0.513(95%CI:0.913-0.112)and 1.148(95%CI:1.800-0.496),respectively.Corresponding reductions in IES-R were 2.620(95%CI:4.279-0.961)and 3.449(95%CI:5.725-1.172).These imply that both lockdown relaxation and compulsory face-covering have a positive association with mental health scores(GAD-7 and IES-R).CONCLUSION The differential impact of lockdown and relaxation on the mental health of population sub-groups is evident in this study with future implications for policy.Introduction of face covering in public places had a stronger positive association with mental health than lockdown relaxation. | Shanaya Rathod Saseendran Pallikadavath Elizabeth Graves Mohammad Mahbubur Rahman Ashlea Brooks Mustafa G Soomro Pranay Rathod Peter Phiri | 2021 | World Journal of Psychiatry2021，11，12： | 0 |
| 4 | Bandwidth Allocation and Control Message Scheduling Algorithms for Improving the QoSs of High Priority Traffic in PON显示文摘The passive optical network(PON)is the most promising candidate for supporting multiple service classes,i.e.,high priority(HP)traffic and best-effort(BE)traffic,in the next-generation broadband access networks.Providing an efficient dynamic bandwidth allocation(DBA)algorithm is the most important issue for supporting multiple service classes of traffic simultaneously.This paper presents a new DBA algorithm,which is the modified version of the hybrid slot-size/rate(HSSR)scheme,and is called the modified HSSR(MHSSR)algorithm.We have also modified the control message scheduling algorithm to fit it to the proposed scheme.In the proposed MHSSR scheme,each cycle time,i.e.,the length of a time cycle,is equally divided into two parts.In the 1st part of the cycle time,the bandwidth is dynamically allocated to the HP traffic of all the optical network units(ONUs).In contrast,in the 2nd part of the cycle time,the bandwidth is dynamically allocated to the BE traffic of one or multiple ONUs.Furthermore,to ensure guaranteed service for the HP traffic,the 1st part of the cycle time is extended while the 2nd part of the cycle time is compressed if the demand of the HP traffic is very high.However,the 1st part of the cycle time will never be compressed,even at the lightly loaded condition of the HP traffic.The modified control message-scheduling algorithm effectively coordinates the timing sequence between the two parts of the cycle time and ensures the synchronization between two Gate messages to each ONU.We have evaluated the performance of the proposed schemes through numerical simulations in terms of endto-end packet delay,bandwidth wastage,remaining bytes per time cycle,jitter,and throughput for different offered loads.From the comparative analysis,it can be seen that the proposed scheme provides better performance than the existing HSSR and delay variation-guaranteed schemes. | Mohammad Mahbubur Rahman Monir Hossen | 2018 | Journal of Communications and Information Networks2018，3，4： | 0 |
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