Front Seat Research Articles

Risk perceptions and risk behavior among children attending a road safety education program in Greece

Abstract Background Road Traffic Injuries (RTI’s) are a significant public health concern for children, placing a considerable burden on their well-being. Greece has consistently recorded high numbers of RTI’s among adolescents. Methods A university lab (LaHeRS, HMU) offers a road safety education program for primary and secondary students in Heraklion, Greece. The program consists of two parallel sessions (practical training using a driving simulator and activity-based risk-perception training) aimed at enhancing competencies in resilience to peer influence, empowering children to engage in informed decision-making and fostering hazard perceptions skills. The current presentation reports on 800 students who attended the program between October 2023 and April 2024. A structured questionnaire was used to collect data on student’s beliefs, attitudes and practices on road safety. Results A total of 800 students attended the program from the broader Crete Region. 50.5% were girls with a mean age of 12.6 (SD = 2.3) years, 60.9% secondary education students, 58% resided in rural areas. 33.9% reported using a motorcycle and 33.8% a car without a driving license. 23.3% reported experiencing a road traffic incident while commuting. 57.1% identified road safety as a problem in their place of residence, only 26.5% felt safe on local streets and only 9.1% considered other road users as watchful. Additionally, 66.8% highly valued helmet use as a precaution in short distances. 71.6% reported always wearing seatbelt in front seats and 68.9% thought seatbelts are important at back seats. 52.1% did not identify themselves as risk takers on the street, and only 22.5% felt competent in avoiding road risks. 32.9% admitted experiencing peer pressure while commuting. Conclusions Risk taking behaviors and low use of protective measures are prevalent among school aged children and need to be addressed through targeted road safety education programs and interventions. Key messages • Promoting safe behaviors and enhancing risk perception is critical among children and young adolescents. • Road safety education should be integrated into school curricula, starting from pre-school education.

Study of the forces in the pretensioned seat belt and their effects on the human body

Abstract The paper aims to analyze the potential injuries induced by the seat belt in case of triggering the pretensioning mechanism. Two mannequins, with different geometries, have been installed on the front seat of the vehicle and were subjected to the efforts generated by the pretensioning of the seat belt, in the absence of an impact of the vehicle. The force due to the impact has been analyzed in various bibliographic resources, in the proposed model it can be taken into account. Efforts were measured in the belt strap for adult passenger and adult pregnant female passenger, or adult passenger with high BMI body mass index. The efforts that act on the human body, with emphasis on the abdominal loop, have been determined. It has been found that stress on the abdomen can cause internal damage, even just by simply triggering the pretensioning system, without taking into account the force on the body due to the impact.

Negative emotions and marketing retrenchment during crisis: attribution effects through crisis severity and strategic orientations

PurposeEmotions are widely acknowledged decision-making drivers, taking the front seat when managers lack objective information. Existing evidence indicates that negative emotions often lead to the decision to retrench. Contrary to these insights, our research aims to show that negative emotions can sometimes push top managers to withdraw from retrenching marketing activities. By drawing on the affect-as-information approach, this study aims to examine the direct and conditional effects of top managers’ negative emotions on small and medium-sized enteprises (SMEs’) intention to retrench marketing activities during the recent economic crisis caused by the COVID-19 pandemic.Design/methodology/approachThis study uses a descriptive research design and surveys a sample of 155 chief executive officers from business-to-business (B2B) SMEs in Croatia. The authors empirically test the conceptual framework with hierarchical regression.FindingsBased on the sample of 155 top managers of SMEs operating in B2B industries, negative emotions positively drive marketing retrenchment. However, additional insights reveal that this relationship is conditioned by crisis severity and SMEs' strategic orientations (exploration and exploitation). The relationship between negative emotions and marketing retrenchment weakens for SMEs severely hampered by the crisis and for SMEs following the exploitative orientation. In contrast, this relationship becomes stronger for SMEs whose business customers have been severely hampered and for SMEs following exploratory orientation.Originality/valueThis research advances the body of knowledge by demonstrating that, depending on the severity of the crisis and the strategic orientation of the SME, top managers may interpret negative emotions quite differently, which eventually has lasting consequences on marketing retrenchment during crises. Therefore, by focusing on emotional microfoundations and unique crisis- and firm-level contingencies, this study goes beyond existing theoretical discussions that contrast marketing retrenchment vs investment and offers a different understanding of why and when SMEs retrench their marketing activities during crises.

An evaluation of front seat distance from rear facing child restraint systems in prevention of injury in frontal crash tests

Objectives Elevated head injury incidence in infants compared to toddlers involved as occupants in motor vehicle crashes has been demonstrated in multiple population-representative crash databases. Further, experimental studies have revealed a potential injury mechanism via impact between a rear-facing, CRS-restrained child and the back of the vehicle seat or console on the row in front of the CRS. Subsequently, experimental studies have suggested that bracing the CRS against the seat immediately in front of the CRS could mitigate head injury, but also indicated that more research was necessary. Thus, we investigated the effect of bracing against the front seat, as well as distance from the front seat with rear-facing infant carriers and rear-facing convertibles, with a focus on changes to measured head, neck and chest injury metrics in rear facing CRSs. Further, we examined the effect of using the infant carrier with and without a base on these injury metrics. Methods 34 frontal sled tests at 30 or 35 mph were conducted using a simulated rear-row vehicle seat and structure representing the front seatback. A Q1.5 anthropomorphic test device (ATD) was placed in a single make/model LATCH-affixed rear-facing convertible or single make/model infant carrier; infant carrier without base was affixed with lap and shoulder belt. To evaluate the effect of bracing and distance, tests were conducted with a 300, 140, 70, or 15 mm gap between the CRS seatback and the front seatback, or a touching (0 mm) or braced (-20 mm) condition. Bayesian regression models quantified the effects of various predictors and model uncertainty. Results For tests with the convertible CRS, no head contact was observed between the head and the front vehicle seatback. For the infant carrier, head contact occurred at both 70 and 140 mm distances but not the other distances. On average, the −20, 0, or 15 mm distances yielded a 60% reduction in head injury criterion with 15 millisecond window (HIC15), and a 60% to 80% reduction in neck tension, compared to the 70 and 140 mm distances; chest acceleration also decreased for the convertible seat only. In the case of both carriers and convertibles, each mm of distance the CRS moves away from the front seatback up to 70 mm, adds 5.3 HIC15 points (95% Credible Interval (CrI):[4.6, 6.2]), and 3.5 Newtons (95% CrI: [2.2, 4.8]) of neck tension, on average. Conclusions Placing a rear facing CRS, both convertibles and infant carriers, against or close to the seatback of the seat immediately in front of the CRS reduces head and tensile neck injury criteria in ATDs. The amount of gap between the front seat and the rear facing CRS is strongly and positively correlated with HIC for both convertibles and infant carriers. RF infant carriers with and without a base yield comparable injury metrics and kinematics when touching or nearly touching the back of the front vehicle seatback.

How Safe Are Nepal’s Roads? A Study of Road Safety Legislation and WHO Standards

Around the world, traffic accidents result in significant catastrophes. The consequences of traffic accidents go far beyond the immediate suffering of the individuals involved. This paper aims to examine the road safety legislation and WHO standards adopted in Nepal. The paper is based on secondary data and policy documents related to road safety and WHO standards in the context of Nepal. It presents Nepal’s road network, significant improvements in road safety indicators, and encouraging advancements in road safety. The study finds five major areas for improvement in road safety laws in Nepal: seat-belt regulations, helmet laws, speed laws, child restraint laws, and drinking and driving laws. The study also reveals that Nepal’s current regulatory framework needs to be improved by monitoring actual appropriate helmet fastening and standardization. There is a lack of precise BAC restrictions for drivers and insufficient speed limits under WHO recommendations. Nepal’s child restraint rules also need to be expanded to include seat belt usage in all cars and forbid children from sitting in the front seats. To close those regulatory gaps and protect Nepalese citizens’ safety on the roads, it ends by providing a strict set of recommendations, such as increased enforcement, public awareness campaigns, and changes to road design and concrete making plans. Policymakers, researchers, and stakeholders working to promote street safety measures in Nepal and abroad would find great assistance from this article, which offers a detailed examination and smart recommendations.

Evaluation of airborne transmission of respiratory contaminants in a passenger car cabin with window opening

Exhaled aerosols can be suspended in the air for long periods, facilitating the transmission of highly infectious respiratory diseases. The risk of exposure to occupants varies due to different usage conditions and driving scenarios of moving vehicles. Therefore, the present study investigates the airborne transmission of contaminants generated by coughing in a moving vehicle and explores the relationship between aerosol dispersion and fluid exchange between the interior and exterior domains of the car under the influence of window opening configurations, seating layouts and driving speeds. The results show that the cross-opening configurations provide a superior contaminant removal efficiency. The effect of seating layout on removal efficiency is significant, although it has a slight effect on air change rate (ACH). The best removal efficiency can be obtained when the passenger sits in the front seat with the right front window opening. Furthermore, the in-cabin ACH is almost linearly correlated with the driving speed. Higher speeds reduce contaminant concentrations faster. However, the risk of driver exposure does not depend solely on ACH, the peak cumulative contaminant concentration and residence time also need to be considered. This study offers data for the prevention and control of respiratory infectious diseases.

Clinical development of ileofemoral thrombosis caused by malposition of the ileosacral screw

Introduction Treatment of unstable injuries of the pelvic bones is one of the unsolved problems in modern traumatology. The instability of the injuries is determined by the nature of the destruction of the posterior semi-ring of the pelvis. The most used technique for osteosynthesis of sacral fractures for unstable pelvic injuries is ileosacral screw fixation.The purpose of the work was to demonstrate a clinical case of an iatrogenic complication: ileofemoral thrombosis caused by compression of the internal iliac vein due to malposition of the ileosacral screw.Materials and methods Medical records of a 34-year-old patient injured in a traffic accident (front seat passenger) were studied, who was referred from a district hospital on the fourth day after the injury diagnosed with a fracture of the transverse process of L2 vertebra on the left, closed fracture of the pubic and ischial bones on the left, fracture of the lateral mass of the sacrum on the right. Alcohol intoxication. Traumatic shock stage 1. Treatment results were monitored throughout the inpatient and outpatient treatment periods. Long-term follow-up was 6 months.Results Timely suspicion of the complication based on physical examination data with CT angiography that assisted to exclude internal bleeding and urgently carry out repeated surgical intervention to correct the implant malposition, reosteosynthesis of S1 body without loss of reduction, to achieve regression of the clinical picture of ileofemoral thrombosis, and also to mobilize the patient in the shortest possible time. During inpatient treatment, regression of the symptoms of the complication was achieved, the patient was fully activated, and was discharged for outpatient follow-ups.Discussion Variability in the anatomy of the sacrum and the characteristics of fractures hinder the navigation while inserting iliosacral screws, which in some cases result in malposition. Compression of the common iliac vein without damaging it causes difficulty in blood outflow and the development of a clinical picture of ileofemoral thrombosis in the early postoperative period.Conclusion This clinical case shows that X-ray images in standard views are not a reliable method for diagnosing sacral injuries and are not sufficient for preoperative planning. The use of standard C-arm did not provide sufficient intraoperative visualization to correctly assess the position of the iliosacral screw, especially in cases with sacral dysmorphia. The 3D volumetric image reconstruction significantly influenced the correct perception of the anatomical structure of the bony structures of the pelvis. Malposition of the screw and its exit to the anterior surface of the sacrum caused disruption of the iliac vein outflow and development of thrombosis in the early postoperative period.

Light‐Dependent Reactivity of Heavy Pnictogen Double Bonds

AbstractThe chemistry of light dipnictenes has been widely investigated in the last century with remarkable achievements especially for azobenzene derivatives. In contrast, distibenes and dibismuthenes are relatively rare and show very limited reactivity. Herein, we have designed a protocol using visible light to enhance the reactivity of heavy dipnictenes. Exploiting the distinctive π–π* transition, we have been able to isolate unique examples of dipnictene‐cobalt complexes. The reactivity of the distibene complex was further exploited using red light in the presence of a diazoolefin to access an unusual four‐membered bicyclo[1.1.0]butane analog, containing only a single carbon atom. These findings set the bases to a conceptually new strategy in heavy element double bonds chemistry where visible light is at the front seat of bond activation.

Light-Dependent Reactivity of Heavy Pnictogen Double Bonds.

The chemistry of light dipnictenes has been widely investigated in the last century with remarkable achievements especially for azobenzene derivatives. In contrast, distibenes and dibismuthenes are relatively rare and show very limited reactivity. Herein, we have designed a protocol using visible light to enhance the reactivity of heavy dipnictenes. Exploiting the distinctive π-π* transition, we have been able to isolate unique examples of dipnictene-cobalt complexes. The reactivity of the distibene complex was further exploited using red light in the presence of a diazoolefin to access an unusual four-membered bicyclo[1.1.0]butane analog, containing only a single carbon atom. These findings set the bases to a conceptually new strategy in heavy element double bonds chemistry where visible light is at the front seat of bond activation.

Reducing the risk of droplet inhalation for taxi drivers by regulating the air supply position according to the exhalation source

The environment inside taxis is relatively closed, making it easy for the drivers to contact with droplets exhaled by the passengers and creating a high risk of respiratory diseases. To study the diffusion of droplets in taxis, the numerical simulation was performed based on gas–solid two–phase flow. The renormalization-group k–epsilon (RNG k–ε) turbulence model and the discrete phase model were used to study the transmission characteristics of droplets with different exhalation sources, and the air-supply positions were chosen to reduce the risk of driver infection from droplet inhalation. Based on the likelihood–exposure–consequence (LEC) method, the cumulative inhalation ratio of droplets was used to assess drivers' infection risk during working. The results show that, the driver's infection risk is least when the passenger sits in the front seat, reducing the risk by 32%–87%. Furthermore, the risk is reduced by 38%–85% when the air supply is changed from two-sided to central. Therefore, the combination that minimizes the risk of inhalation infection for taxi drivers is the passenger sitting in the front seat and the air being supplied centrally in the taxi, which can provide a reference for improving the car layout and ventilation system of the taxi.

Child face detection on front passenger seat through deep learning

Objective One of the main causes of death worldwide among young people are car crashes, and most of these fatalities occur to children who are seated in the front passenger seat and who, at the time of an accident, receive a direct impact from the airbags, which is lethal for children under 13 years of age. The present study seeks to raise awareness of this risk by interior monitoring with a child face detection system that serves to alert the driver that the child should not be sitting in the front passenger seat. Methods The system incorporates processing of data collected, elements of deep learning such as transfer learning, fine-tunning and facial detection to identify the presence of children in a robust way, which was achieved by training with a dataset generated from scratch for this specific purpose. The MobileNetV2 architecture was used based on the good performance shown when compared with the Inception architecture for this task; and its low computational cost, which facilitates implementing the final model on a Raspberry Pi 4B. Results The resulting image dataset consisted of 102 empty seats, 71 children (0-13 years), and 96 adults (14-75 years). From the data augmentation, there were 2,496 images for adults and 2,310 for children. The classification of faces without sliding window gave a result of 98% accuracy and 100% precision. Finally, using the proposed methodology, it was possible to detect children in the front passenger seat in real time, with a delay of 1 s per decision and sliding window criterion, reaching an accuracy of 100%. Conclusions Although our 100% accuracy in an experimental environment is somewhat idealized in that the sensor was not blocked by direct sunlight, nor was it partially or completely covered by dirt or other debris common in vehicles transporting children. The present study showed that is possible the implementation of a robust noninvasive classification system made on Raspberry Pi 4 Model B in any automobile for the detection of a child in the front seat through deep learning methods such as Deep CNN.

IJCM_246A: Estimating the prevalence of seat belt usage in motor cars: A descriptive cross-sectional study in Mangalore

Background: Every year 1.25 million people die of road traffic accidents. Several safety measures can be taken to prevent RTAs. The SDG 2030 set the target to halve the number of global death and injuries from road traffic accidents by the year 2020. The aim of this study is to estimate the prevalence of seat belt use and factors influencing it including driver characteristics, type of car and time of day and distractions while driving. Methodology: This Descriptive cross-sectional study was set on the major roads and intersections of Mangalore, recruiting the drivers and front-seat passengers in the motor cars at the time and site of observation. Results: A total of 6165 motor cars were observed. 15 (0.2%) of these cars had completely tinted car windows, therefore out of the total, 6150 motor cars could be properly observed. 70.91% (4361) of drivers were wearing seat belts. Seat belt usage among drivers was found to be higher on highways (76.6%) as compared to on residential and city roads (69.3%). In vicinity of traffic police, 76.5% of drivers were observed to be wearing seat belts in contrary only 67.8% of them were wearing seatbelts in the absence of traffic police. Prevalence of mobile phone use and other distractions amongst drivers was 2.1%. Out of 2646 adult front seat passengers observed, only 10.9% were wearing seat belts. Conclusion: Among drivers, type of motor car, traffic zone and type of road and presence of traffic police in vicinity are significantly associated factors with seatbelt usage. Among adult front seat passengers, type of motor car, traffic zone, type of road and presence of traffic police in vicinity are significantly associated. Among front seat child passengers, type of road and traffic zone are significantly associated with seat belt usage.

Sustainable manufacturing through empowering machine tools with IoT innovations: a literature review

In the 21st century, sustainability takes the front seat as one of the main objectives while designing and developing new technologies. Machine tools have significant contributions in fuelling all four industrial revolutions. One of the major stepping stones to the fifth Industrial Revolution is making these machine tools sustainable. In this paper, we review the major developments driven by the integration of internet of things (IoT) in the field of machine tools which contribute to achieving a sustainable future. This integration of IoT in machine tools is also significant in contributing to different sustainable development goals of the United Nations. Through this work, we aim to reach a better understanding of current improvements in machine tool operations and ecosystem achieved through IoT innovations. The future research directions that are opening in this domain and their scope and limitations are also covered.

The influence of seated postures and anthropometry on lap belt fit in vehicle occupants: A 3D computed tomography study

Objective In vehicle frontal collisions, it is crucial that the lap belt is designed to engage with the anterior superior iliac spine (ASIS) of occupants for a reliable restraint. This study aims to understand the influence of different seated postures on the geometrical relationship of the seat belt and the pelvis for various occupants using 3D upright and supine computed tomography (CT) systems. Methods The 3D shapes of bones and soft tissues around the pelvis were acquired through a CT scan for 30 participants. They were seated in a rigid seat equipped with a lap belt simulating the front seat of a small car, and wore a lap belt in three seated postures: upright, slouched and reclined. Parameters related to the likelihood of submarining occurrences, such as belt-ASIS overlap (an index for assessing the potential engagement of the lap belt with the ASIS) and the belt-pelvis angle (the difference between the belt angle and the normal direction of the anterior edge of the ilium) were compared. Results It was observed that the pelvis angle tilted rearward as the hip point was positioned forward and seatback angle increased. This can be seen in the slouched and reclined posture. The belt-pelvis angle was comparable between the slouched and the reclined postures, and was closer to zero (indicating that the lap belt path is closer to perpendicular to the anterior edge of the ilium) compared to the upright posture. In contrast, the belt-ASIS overlap increased with an increasing flesh margin of the ASIS and shallower belt angle. This suggests that the belt-pelvis angle is influenced by the seated posture whereas the belt-ASIS overlap is dependent more on an individual’s anthropometry. The plot of belt-pelvis angle and belt-ASIS overlap exhibited significant variability among participants. Conclusions The belt-pelvis angle and the belt-ASIS overlap of individuals will provide valuable information for understanding the current belt-fit location and predicting submarining occurrences for individuals in various postures when designing restraint systems.

Summary of influences that led to introduction of frontal airbags on US passenger vehicles

Objective The history of airbags for occupant protection in frontal crashes is reviewed from the perspective of a former Senior Executive at NHTSA from the early 1970’s to the late 1980’s. This paper summarizes the factors that led to regulatory delays as well as those that led to voluntary adoption of airbags by several manufacturers. Methods The regulatory history and interactions with airbag suppliers and vehicle manufactures is recounted citing key steps in the evolution of frontal airbags. Results When the Advanced Notice of Proposed Rulemaking for Standard 208, “Occupant Protection” was issued on July 2, 1969 the Safety Agency anticipated that the industry response would provide automatic frontal crash protection from airbags that deployed to protect all front seat occupants from injury in severe frontal crashes. It was not until, September 1, 1998 that airbags were required in all cars and light trucks. The interim 29 years involved a series of stops and starts during which most of the original airbag suppliers lost interest and abandoned the airbag market. The issues associated with airbags and their place in Standard 208 were directly influenced by interventions from the President, the Congress, the Supreme Court, Secretaries of Transportation, NHTSA Administrators, the Presidents of US Auto Companies and Senior Executives of Insurance Companies. Conclusion In 1966, there was support from the US auto industry for a single source of safety regulations that apply to new vehicles sold in the US. This is evidenced by the unanimous passage by the House of Representatives and Senate of the Law that created the Federal auto safety regulatory framework. The Law also required seatbelts in new cars and prohibited States from making separate safety rules. However, the large safety benefits offered by seatbelts were negated because they were rarely used. Consequently, finding ways of providing high levels of protection without requiring action by occupants became a goal of the new Safety Agency. The airbag offered the possibility of achieving that goal. From the initial airbag notice of proposed rulemaking on July 2, 1969, Safety Agency required 2 years to resolve objections before a final Standard 208 could be issued (on July 8,1971). The subsequent industry opposition to the Standard 208 employed Presidential influence and Court suits to cause a 5½ year delay until the Coleman Decision on December 6, 1976. Changes in regulatory approach of the Ford, Carter, and Reagan Administrations and associated Court suits caused another 7½ year delay until the Dole Decision on July 17, 1984. It required another 7 ½, until December 18, 1991, for market forces to reduce industry opposition to airbags and permit Congress to pass a law that mandated them. Another 6½ years of lead time was required before all cars and light trucks were required to meet the airbag standard. During the mid and late 1980’s vehicle safety ratings, seatbelt use laws, and Vince and Larry PSA’s had all acted to increase safety awareness and safety belt use. Consequently, added public demand for vehicle safety features slowly developed. Changes in economic incentives encouraged a number of vehicle lines to install driver airbags as standard equipment and the feature was being widely advertised by Chrysler. This combination of events made it possible for Congress to pass and President Bush 41 to sign legislation requiring airbags in cars and light trucks by September 1, 1998 – more than 29 years after the initial rulemaking notice in 1969.

Effect of spraying air freshener on particulate and volatile organic compounds in vehicles

People in these days spend approximately 6 % of their time in a means of transport. Air fresheners are frequently used in vehicles to mask odors; however, they can cause adverse health effects such as cardiovascular disease, systemic inflammation and autonomic dysfunction. This study aimed to identify the effects of air fresheners on the concentrations of particulate and volatile organic compounds (VOCs) in different vehicle cabins. Scanning mobility and optical particle sizers were used for the particle measurements. VOCs (e.g., BTEX and d-limonene) were collected using a Tenax TA. The products were sprayed for less than a minute. The study assessed three spray products (all trigger types), vehicle size (small, medium, and large), cabin temperature (10 °C, 20 °C, and 25 °C), and in-vehicle ventilation mode (all-off, recirculation, and external inflow modes). The particle concentration increased rapidly during the 1-min spraying of the products. The proportion of nanoparticles in the front seat (67.2 % ± 2.2 %) was 11.1 % ± 2.2 % lower than that in the rear seat (75.6 % ± 2.1 %). The spray product and vehicle size did not significantly affect the particle or VOC concentrations. With an increase in the temperature of the front seat, the proportion of nanoparticles increased by 25.3 % ± 3.2 %. Moreover, the maximum total VOC concentrations (front seat: 364.3 μg/m3; back seat: 241.3 μg/m3) were observed at 20 °C. Under in-vehicle ventilation, recirculation effectively reduced the overall particle concentration within the cabin; however, the generated VOCs circulated. The external inflow proved effective in cabin air purification by reducing the total VOC concentration to 56.0–57.2 % compared with other ventilation modes. These findings provide substantial insight into the persistence of particles and the dynamics of their dispersion, thereby enabling informed decision-making for particle-related risk management.

Voyage Out, Voyage Up?

In studies of the Black-British Bildungsroman, “race” and/or gender tend to take the front seat, even if class rarely goes unmentioned as yet another obstacle in the narrated formation of upwardly mobile subjectivities of post-migration. However, there is no critical consensus about the political and affective concerns that drive these appropriations of the Bildungsroman genre for imagining post-migrant experiences of (de)marginalisation. While Mark Stein has influentially emphasised the symbolic agency represented in and exerted by such “novels of transformation”, others have noted the ambiguities that resonate in narratives of post-migrant upward mobility. Intervening in this debate with a sustained focus on class, I reread two texts rarely discussed in these generic terms – Zadie Smith’s White Teeth (2000) and NW (2012) – against the backdrop of neoliberal meritocracy and its cruel optimism. Both novels stage post-migrant achievement against all intersectional odds in politically conflicted and literarily productive ways that challenge the good-life fantasy of upward mobility conventionalised in the Black-British Bildungsroman as a demarginalising, socially transformative genre. I argue that Smith’s novels unmake the cruel optimism of post-migrant success stories by remaking the Bildungsroman as most contradictory of modern symbolic forms.

Novel approaches to biometric security using enhanced session keys and elliptic curve cryptography

Biometric systems have taken the front seat as having core foundations in 21stcentury digital information technology, biometric systems hold a position therein or authentication processes. But the growing complexity of cyber threats requires greater security practices. This paper presents an innovative biometric security approach based on the combination of ECC and more advanced session keys. The goal is to strengthen biometric systems against sophisticated cyber threats ensuring fast and effective authentication methods. The proposed approach takes advantage of ECC’s strength in generating secure biometric data along with session keys dynamically to build a more resilient, yet flexible, security model. It is shown on the simulations that security metrics increase significantly in terms of resistance to common cryptographic attacks and data breaches without decreasing the system performance. This study describes not only the current vulnerabilities in biometric security systems towards more secure and reliable authentication systems by the convergence of biometric data to advanced cryptographic techniques.

Development of a Restraint System for Rear-Facing Car Seats

In self-driving vehicles, passengers can set their seats in an unconventional seating position, such as rear-facing. Sitting in such an orientation can increase the risk of whiplash in the head-and-neck system in a frontal impact, as frontal crashes usually have higher severities compared with rear-end crashes. This paper shows that a forward-facing front seat optimised for rear-impact protection needs to be redesigned to be used as a rear-facing seat. In the second and main part of this paper, a restraint system for rear-facing car seats is developed, and frontal impact simulations with 64 km/h of delta-V are used to evaluate its performance. The designed seating system comprises two rigid torso plates, a fixed recliner and an energy absorber under the seat pan. Without using the developed restraint system, the 50th percentile male human model is exposed to neck shear forces exceeding 600 N. With the developed restraint system, neck shear forces are less than 350 N in frontal impacts with 64 km/h of delta-V. Apart from whiplash, the risk of head, chest, lower extremity and lower back injuries are also evaluated. The results confirm that the developed restraint system successfully protects the occupant since all assessment criteria values are lower than the injury assessment reference values.

In-car occupants' exposure to airborne fine particles under different ventilation settings: Practical implications

Passenger cars/taxis represent the commonly used mode of transport in cities worldwide. This study offers insights into in-car occupants' exposure to fine particles (PM2.5) in the city-state of Singapore. Real-time assessment of personal exposure to PM2.5 was carried out simultaneously among four seating positions (two seats on the front side and two seats on the rear side) in a petrol-driven passenger car under different ventilation settings. Results show that the windows-open setting exposes car commuters to higher PM2.5 concentrations, while the windows-closed configuration with the operation of the air-conditioning system and internal/external air circulation leads to relatively lower PM2.5 exposure. To gain insights into airflow patterns inside the car, we carried out Computational Fluid Dynamics (CFD) simulations, which reveal that the internal mixing of air inside the car cabin is restricted on its backside during the windows-closed ventilation setting, leading to higher exposure of passengers seated in rear seats than those sitting in front seats (about two times). In contrast, with the open ventilation, the PM2.5 concentration is almost identical among the four seating positions, indicating that the car cabin is a well-mixed microenvironment in this ventilation setting. This is the first study in which PM2.5 concentrations in multiple seating positions were simultaneously measured and their spatial distributions were simulated under different ventilation settings. Based on the study outcomes, we provide recommendations to reduce commuters' exposure to traffic-related airborne particles inside passenger cars.