Multiple Access System Based on ARM7 and 1-Wire TechnologyÂ

This paper presents a multiple hardware applications based on ARM and 1-wire protocol. In this paper, the single i-button is used for different purposes like authentication, vending purpose , eCash, electronic toll tax system. This application has several components such as 1-wire network of iButton, EEPROM memory, mode selection keypad and LCD display

Investigation of the Effect of Ski Jump on the Flow Dynamics around Generic Aircraft Carrier

The landing operation on an aircraft carrier is a complicated and risky process. Unlike land-based operations, the landing area available on carriers is in continuous motion in all the six degrees of freedom. The ski jump, flight deck, hull, and superstructure of the carrier interact with the oncoming wind’s flow-field which creates a turbulent airflow behind the carrier. This ‘burble effect’ is very dangerous and has caused various mishaps in the past. To complement the work being undertaken at IIT Delhi to study the flow dynamics in the carrier environment, the present study investigates the effect of ski jump and superstructure on the flow around the generic aircraft carrier (GAC). Computational fluid dynamics (CFD) studies are undertaken to simulate the airwake and establish a baseline with the ski jump. Subsequently, further studies are carried out to analyse the sensitivity of the wake to changes in carrier geometry. The introduction of the ski generates a major proportion of turbulence encountered in the aft by the approaching pilot. This is reduced significantly by optimising ski jump geometry in various ways

Adding the Third Dimension to Building Construction Technology in Architecture Education

This paper looks into conventional teaching practices and intends to generate a new approach towards the teaching of Building Construction in architecture schools. With the fast pace of the current world and changing technology, conventional teaching practices that are largely based on information assimilation have ceased to serve us adequately. The rate of change in trends and technologies in the current times do not match the content of our existing syllabus. This paper tries to identify the role and application of Building Construction Technology for training the young minds for handling future challenges and coping up with upcoming developments. It talks about various experimentation and exploration techniques aimed at enhancing the student’s analytical ability as well as his/her understanding of materials, techniques, systems, etc. The Building Construction Technology team at IDEAS has tried to bridge the gap between conventional teaching methods and the changing technology by adding a third dimension to reaching-learning methodology. The paper presents methods devised and tested in the Second Year Building Construction Studio for enabling the students for creative handling of materials and technology

Constant-Roll Inflation in modified f(R,ϕ)f(R,\phi) gravity model using Palatini Formalism

In this work, we study a constant-roll inflationary model in the Palatini formalism using modified gravity. Here our action consists a non-minimal coupling of a scalar field $\phi$ with Ricci scalar $R$ in a general form of $f(R,\phi)$. Using Palatini approach, we write its equivalent scalar-tensor form in the Einstein frame and then apply the constant-roll condition in the equation of motion for the inflaton field. Later the tensor-to-scalar ratio and the spectral index are calculated using the slow-roll parameters and the results obtained are matched with the Planck 2018 data. We found that the results agree nicely with the observations within the parameter regime under consideration.Comment: 13 Pages and 10 Figure

Investigating the Hubble Tension: Effect of Cepheid Calibration

Recent observations of Type Ia supernovae (SNe) by SH0ES collaboration (R11 and R16) diverge from the value reported by recent CMBR observations utilising the Planck satellite and application of the $\Lambda CDM$ cosmological model by at least $3 \sigma$. It is among the most challenging problems in contemporary cosmology and is known as the Hubble tension. The SNe Ia in R11 and R16 were calibrated through cepheid variables in three distinct galaxies: Milky Way, LMC, and NGC4258. Carnegie Hubble Program (CHP) observations of type Ia SNe calibrated using the tip of the red giant approach yielded a somewhat different estimate for the Hubble constant. This decreased the Hubble tension from over 3$\sigma$ to below 2$\sigma$. It is a legitimate question to answer whether there are any issues with SNe Ia calibration and to investigate whether the Hubble tension is real or not. We use statistical techniques namely, ANOVA, K-S test, and t-test to examine whether the cepheid calibration is host-dependent. Our analysis shows that (i) both R11 and R16 data suffer from non-Gaussian systematic effects, (ii) $H_0$ values in the sub-samples (different anchor-based) in both R11 and R16 groups are significantly different at a 99\% confidence level, and (iii) neglecting the metal-rich MW sample does not reduce the $H_0$ value significantly, and thus Hubble tension persists. A small reduction in the Hubble constant could be linked to the differences in the host environment. Hence instead of using a single universal relation environment based slope and zero point should be preferred.Comment: 15 pages (single column), 7 figure

MeshSOS: An IoT Based Emergency Response System

Due to the limited mobility and technical knowledge, senior and disabled citizens of the society face difficulties during emergencies. Most hardware/software emergency assistance/response systems available in the market have a complex user interface even for the general public. Requesting help using these systems requires sharing information such as type and location of the event, which wastes precious time to respond to the event. Often, citizens end up handling the event themselves instead of waiting for someone to arrive at the event location. Hence, it is necessary to design a simple but incredibly robust system which bypasses the challenges of traditional emergency response systems. In this paper, we propose an Internet of Things (IoT) based mesh-enabled emergency response system called MeshSOS, which enables senior and disabled citizens to get assistance by simply pressing a button. Use of mesh networking along with WiFi made our system robust to network failures. We have also developed a central monitoring application for healthcare and security agencies to handle emergency events proactively. Initial field experiments and simulations show that our system has the potential to improve the robustness and response time in an energy and cost-efficient manner

The wounded healer during COVID-19: unraveling the violence against healthcare workers in Nepal

On 27th May 2021, a nurse was working in the intensive care unit (ICU) at Bheri Hospital, Nepal when she was startled by a commotion. A hand grabbed her neck and choked her just as she looked behind. “She’s the one responsible,” said the perpetrator, whose brother had succumbed to the coronavirus disease (COVID-19), as his henchmen thrashed other staff on duty. Luckily a relative of another patient rescued the nurse from the vice of the attacker. The staff fled to the duty room. Huddled in the duty room, they wailed for their safety as the perpetrators banged at the door. They then ran into the toilet inside the duty room just as the duty room’s door was broken open. As the door of the toilet could not keep them from the offenders, three nurses and a doctor jumped off the second floor, fearing for their lives. Fortunately, they landed on the sand and ran to safety. Two patients died because of lack of care amidst the chaos.1,

A starch edible surface coating delays banana fruit ripening

A rice starch edible coating blended with sucrose esters was developed for controlling the postharvest physiological activity of Cavendish banana to extend postharvest quality during ripening at 20 ± 2 °C. Coating effectiveness was assessed against changes in fruit physiochemical parameters such as weight loss, titratable acidity, total soluble solids, flesh fruit firmness, ion leakage, colour change, respiration, ethylene production, chlorophyll degradation and starch conversion were determined. The topography of coating material on the fruit surface was evaluated by scanning electron microscope (SEM). Surface morphology studies highlighted the binding compatibility of the coating matrix with the fruit peel character and formed a continuous uniform layer over the fruit surface. The results showed that the coating was effective in delaying ethylene biosynthesis and reducing respiration rate. Other factors impacting included delayed chlorophyll degradation, reduced weight loss and retention of fruit firmness for the first six days, all of which improved the commercial value of the fruit. The shelf life of coated fruit was prolonged for 12 days in comparison with the untreated control which ripened within seven days and lost marketability after Day 6. The pilot study demonstrates the effectiveness of a starch-based edible coating formulation for improving the ambient storage capacity of banana fruit