Representation of Emerging COVID-19 in Bangladeshi Newspapers

This study explains how Bangladeshi media responded during the coronavirus crisis focusing on the issues of news related to COVID-19 The study analyzes the content of a total of 744 articles in the ProthomAlo The Daily Star the country s most-read newspapers in-between the timeline from 8th March 2020 to 4th April 2020 It investigates how the COVID-19 presented as furious and deadly virus among the readers In particular this study explores the representation pattern of the phenomena of emerging deadly infectious diseases in the newspapers Using Social Representation Theory SRT the study investigates the collective meaning sharing focus on the news coverage during the early stage of the COVID-19 outbreak in Bangladesh The study also finds out how the newspapers sideline the representation of this pandemic as a health crisis to national economic crisis Thus the representation covers up the government irresponsibility by focusing more on unconscious mass and limitations of a developing country Therefore the panic increases and the solution of this pandemic muffled under it Also this study provides some tentative explanations for this linguistic representation by editorial sections of these newspaper

Clinicopathological significance of preoperative thrombocytosis in patients with epithelial ovarian cancer

Background: Reactive thrombocytosis is reported in a variety of solid tumors. A few studies have documented preoperative thrombocytosis in ovarian cancer. Methods: This was a cross-sectional study conducted in the Department of Gynaecological Oncology, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh, during January to December 2019. A total of 94 patients with epithelial ovarian cancer between 18-70 years of age who underwent primary surgical treatment were included in this study. Chi-square tests were done to see the significance of differences between the two groups where p<0.05 considered as the level of significance with 95% CI. Results: The mean age was 45.39±13.23 years in the thrombocytosis and 48.98±15.46 years in without thrombocytosis group with a range of 18 to 70 years (p=0.231). The difference in education and occupation were statistically significant (p<0.05) between the two groups. The mean Hb% was 10.02±1.47 (gm/dl) in thrombocytosis and 11.15±1.52 (gm/dl) without thrombocytosis group. The difference was statistically significant (p<0.001) between two groups. The study showed that 30 (75.0%) patient’s serum CA-125 was >500 in the thrombocytosis group and 9 (16.7%) in the without thrombocytosis group (p=0,001), OR=15.0, 95.0% CI=4.92 to 47.72, p=0.001. Optimal cytoreduction between two groups were observed statistically significant (p=0.004), OR=3.49, 95.0% CI=1.33 to 9.28. The difference of grade of tumor observed statistically significant between the groups (p=0.022). The 11 (27.5%) patients had lymph node metastasis in thrombocytosis group and 6 (11.1%) in without thrombocytosis, OR=3.03, 95.0% CI=0.91 to 10.48, p=0.022. The OR of developing lymph node metastasis was 3.03 times higher in the thrombocytosis group. Conclusions: Thrombocytosis was commonly detected in preoperative evaluation of women diagnosed with epithelial ovarian cancer. Anemia, higher serum CA-125 level >500, sub-optimal cytoreduction, advanced stage disease, higher grade tumor, and lymphnode metastasis were significantly more frequent in patients with thrombocytosis

State Of Charge And Parameter Estimation Of Electric Vehicle Batteries

Due to rising global environmental issues, electric vehicles (EV) are growing in popularity and will eventually replace vehicles that use internal combustion engines (ICE). EVs draw their power from batteries. Batteries are highly nonlinear storage elements used in a constantly changing environment making them highly dynamic and mathematically complex. In order to approximate the driving range of an EV, the state of charge (SOC) of the battery, which cannot be directly measured, has to be estimated accurately. SOC is highly dependent on the following parameters: internal resistance, temperature, and open circuit voltage. In this paper, two battery equivalent circuit models (ECM) are analyzed in conjunction with a thermal model to track the inner temperature of the battery. The states of the battery are estimated The copyright for the paper content remains with the author.using the popular Kalman filter (KF) and unscented Kalman filter (UKF), and the results are discussed

Financial and Performance Analyses of Microcontroller Based Solar-Powered Autorickshaw for a Developing Country

This paper presents a case study to examine the economic viability and performance analysis of a microcontroller based solar powered battery operated autorickshaw (m-SBAR), for the developing countries, which is compared with different types of rickshaws such as pedal rickshaw (PR), battery operated autorickshaw (BAR), and solar-powered battery operated autorickshaw (SBAR), available in Bangladesh. The BAR consists of a rickshaw structure, a battery bank, a battery charge controller, a DC motor driver, and a DC motor whereas the proposed m-SBAR contains additional components like solar panel and microcontroller based DC motor driver. The complete design considered the local radiation data and load profile of the proposed m-SBAR. The Levelized Cost of Energy (LCOE) analysis, Net Present Worth, payback periods, and Benefit-to-Cost Ratio methods have been used to evaluate the financial feasibility and sensitivity analysis of m-SBAR, grid-powered BAR, and PR. The numerical analysis reveals that LCOE and Benefit-to-Cost Ratio of the proposed m-SBAR are lower compared to the grid-powered BAR. It has also been found that microcontroller based DC motor control circuit reduces battery discharge rate, improves battery life, and controls motor speed efficiency

Experimental investigation of thermoelectric cooling for a new battery pack design in a copper holder

Solid-state thermoelectric refrigeration and heat pump systems can be integrated with battery packs in electric vehicles (EV) and hybrid electric vehicles (HEV) for effective thermal management in both hot and cold environments. Operating modes can be switched by changing the polarity of the input voltage to the thermoelectric system. In this paper, a new design of a battery pack is proposed which includes an acrylic battery container, copper battery holders, liquid cooling medium, and battery cells. This battery pack is integrated with a battery thermal management system (BTMS) which includes thermoelectric cooling (TEC) in combination with liquid and air circulations. The aim of the BTMS is to handle heat generation during operation of the battery pack. Heat, generated by the battery pack, is transported to the cold end of the TEC and then dissipated to the surrounding environment by a heatsink. Fundamental design optimization is carried out on a single cell first. System performance is then validated in the battery pack experiments. For the 40 ​V test, the proposed system reached approximately 20 ​°C lower when compared with only liquid cooling. In the 30 ​V power supply test, the battery pack temperature did not exceed 30 ​°C in a period of 5000 ​s. Furthermore, the battery pack temperature was under 60 ​°C at 3000 ​s during a continuous discharge condition with a 50 ​V input, which is considered an extreme condition for battery operation

Experimental Investigation of the Cooling Effect Generated by a Heat Sink Integrated Thermoelectric-Based U-Shaped Air-Conditioning System

Over the past years, thermoelectric refrigeration has attracted considerable attention due to its compact size, reliability, and environmental friendliness. Traditional refrigeration systems use greenhouse gases, which significantly impacts our environment. Therefore, in this work, a thermoelectric cooler prototype refrigeration system, a solid-state device causing no harm to the environment, was constructed and tested experimentally. A heat sink was attached to the cold side of the thermoelectric cooler (TEC) to cool the air passing through the heat sink. In contrast, a cold plate was attached to the hot side of TEC to remove the generated heat with the help of the liquid circulating in the aluminium cold plate. Experiments were carried out by varying parameters such as input current to the TEC module, inlet air flow rate, water flow rate through the cold plate, etc. The experimental results indicate that the cooling effect is increased by approximately 40%, increasing current from 2A to 8A. However, the cooling effect was decreased with increasing inlet airflow rate by 58% when airflow rate increased from 2.25 m/s to 3.55 m/s. However, the system performance shows approximately 35% increment with an increase in fan speed. Furthermore, a decrease in the water flow rate from 3.04 L/m to 1.80 L/m showed a slight increment in the cooling by 15%