Bridging Ride and Play Comfort

The notion of comfort with respect to rides, such as roller coasters, is typically addressed from the perspective of a physical ride, where the convenience of transportation is redefined to minimize risk and maximize thrill. As a popular form of entertainment, roller coasters sit at the nexus of rides and games, providing a suitable environment to measure both mental and physical experiences of rider comfort. In this paper, the way risk and comfort affect such experiences is investigated, and the connection between play comfort and ride comfort is explored. A roller coaster ride simulation is adopted as the target environment for this research, which combines the feeling of being thrill and comfort simultaneously. At the same time, this paper also expands research on roller coaster rides while bridging the rides and games via the analogy of the law of physics, a concept currently known as motion in mind. This study’s contribution involves a roller coaster ride model, which provides an extended understanding of the relationship between physical performance and the mental experience relative to the concept of motion in mind while establishing critical criteria for a comfortable experience of both the ride and play.

Drag Reduction of TVS Scooty using a Windshield for the Rider Comfort Improvement

Rider comfort and safety has become an essential theme in the design of two-wheeler vehicles. Comfort incorporates wind noise, air pressure on the rider, visibility and the stability of the Scooty handle. Rider comfort and the potential aerodynamics concern have encouraged the current authors to carry out the Computational Fluid Dynamics (CFD) analysis of TVS pep+ Scooty. Numerical computations were carried out using the standard k-ε turbulence model to examine the aerodynamic force coefficients, pressure distribution, velocity vector and streamlines around the Scooty and rider. Simulations were done for a range of speed on an existing and redesigned model of Scooty with a different windshield height. The simulation result shows that there is a reduction in the coefficient of drag (Cd) from 1.58 (baseline model) to 0.95 (model 3) at a speed of 60kmph. The pressure contour reveals the inclusion of the windshield of height 130mm in the baseline model has diminished the pressure drag on the rider. Visual of velocity contour depicts that the velocity of the air decrease above the neck region with in-creasing windshield height at a vehicle speed 120kmph. This study reinforces the need of windshield height of 150mm in the baseline model to avoid unwanted aerodynamic benefits on the rider.

Dimensional Multivariate Statistics on Quality Enhancement Systems Embraced for Rapid Transit Systems

The study revolves around effective quality practices embraced along the construction of a rapid transit system at the Chennai airport station concerning managers and comfort level satisfaction. It also aims to compare various dimensions of quality practices and satisfaction levels. A Dimensional survey on engineers and metro users was made and analyzed using SPSS software. The study includes mid-level managers and users of the rapid transit system at Chennai, Tamilnadu. The study has tracked down ten dimensions of quality practices such as work hardness, material standards, materials rates, alternate methods, design criteria, safety nature, structural efficiency, work efficiency, labour & work time, job satisfaction to mid-level Manager’s job satisfaction. The study also identified the other ten dimensions such as traffic reduction, Reach on-time, Smart ticketing system, female coach, daily waver Fare, Vehicle strand area, elevators, Frequency of trips, workplace access, Rider Comfort concerning Metro User's satisfaction. Besides, the study also confirmed that there is a significant impact on the reduction in Traffic reduction, On-Time, Smart ticketing system and Vehicle Strand area. The critical dimensions of the study may help the stakeholders & management to implement effective quality practices in the construction works of rapid transit systems and Services Offered to the Public community.

Analisis Kontur Paving Block yang Memberi Dampak Bagi Pengendara di Jalan Universitas Sebelas Maret

Installation of paving blocks is currently being done and is one of the alternative choices for road pavement because the attractive and easily applied form of paving blocks makes it often used in various regions, one of which is the university area, Sebelas Maret University. However, over time the condition of paving blocks in the environment has decreased the quality standard so that it has an impact on the vehicle. This writing aims to determine and explain the condition of the paving block contour and its effects on the streets of Sebelas Maret University and encourage motorists to be careful when passing through the streets. The research method used is descriptive qualitative by means of case studies on the streets of the Sebelas Maret University area. The results showed that the installation of paving blocks in Sebelas Maret University was considered ineffective for hardening roads. Moving ground results in uneven contours of the paving block and deflection. Long after, this is causing disruption to the rider comfort while driving and raises the potential danger to the rider.

Rider reported factors influencing choice of stirrup length in dressage, showjumping and eventing, and para equestrianism

The main functions of a saddle are to improve rider stability and comfort, with the stirrups providing support for the rider’s legs. The criteria upon which riders base their choice of stirrup length for different equestrian disciplines does not appear to have been reported. Therefore, this study was designed to investigate the factors that play a role in a rider’s choice of stirrup length for different equestrian and para-equestrian disciplines. An online questionnaire consisting of open and closed demographic questions, and 28 Likert scale questions related to factors which are anecdotally associated with stirrup length was distributed via social media horse pages. Respondents were asked to identify factors that influenced their decision making when setting their stirrup length in dressage, showjumping and eventing (dressage, showjumping and cross-country phases). 2,183 participants took part in this study, the majority were female (97%; n=2,131). 8% of the sample (n=184) categorised themselves as para-equestrians. Most respondents (n=1,200) identified themselves as dressage riders (amateur: 89%, n=1,068; professional: 11%, n=132), 665 riders engaged in showjumping (amateur: 87%, n=579; professional: 13%, n=86) and a further 393 riders selected eventing as their primary discipline (amateur: 89%, n= 350; professional: 11%, n=43). All riders consistently ranked feel of stirrups once mounted, how stable stirrups feel once moving and type of saddle being used as the three most important factors when deciding stirrup length across the disciplines. Dressage riders were more greatly influenced by the factors investigated when setting stirrup length then either showjumping or event riders (Kruskal Wallis: P<0.04). For eventing participants, exercise type, safety, saddle type and rider stability were key factors influencing stirrup length selection between different phases of the competition. These factors were generally ranked as more important for the dressage/flatwork phase compared to showjumping or cross country schooling (Kruskal Wallis: P<0.01). Stirrup length is likely to affect rider comfort, performance and safety while having relatively less effect on the horse’s well-being, therefore it is not surprising that riders from all disciplines placed high emphasis on factors related to the rider and saddle.

An Analytical and Numerical Study of Magnetic Spring Suspension with Energy Recovery Capabilities

As the automotive paradigm shifts towards electric, limited range remains a key challenge. Increasing the battery size adds weight, which yields diminishing returns in range per kilowatt-hour. Therefore, energy recovery systems, such as regenerative braking and photovoltaic cells, are desirable to recharge the onboard batteries in between hub charge cycles. While some reports of regenerative suspension do exist, they all harvest energy in a parasitic manner, and the predicted power output is extremely low, since the majority of the energy is still dissipated to the environment by the suspension. This paper proposes a fundamental suspension redesign using a magnetically-levitated spring mechanism and aims to increase the recoverable energy significantly by directly coupling an electromagnetic transducer as the main damper. Furthermore, the highly nonlinear magnetic restoring force can also potentially enhance rider comfort. Analytical and numerical models have been constructed. Road roughness data from an Australian road were used to numerically simulate a representative environment response. Simulation suggests that 10’s of kW to >100 kW can theoretically be generated by a medium-sized car travelling on a typical paved road (about 2–3 orders of magnitude higher than literature reports on parasitic regenerative suspension schemes), while still maintaining well below the discomfort threshold for passengers (<0.315 m/s 2 on average).