Using naturalistic data to assess e-cyclist behavior

In Europe, the use of electric bicycles is rapidly increasing. This trend raises important safety concerns: Is their use compatible with existing infrastructure and regulations? Do they present novel safety issues? How do they impact other traffic? This study sought to address these concerns, using instrumented electric bicycles to monitor e-cyclists’ behavior in a naturalistic fashion. Data was collected from 12 bicyclists, each of whom rode an instrumented bicycle for two weeks. In total, 1500 km worth of data were collected, including 88 critical events (crashes and near-crashes). Analysis of these critical events identified pedestrians, light vehicles and other bicycles as main threats to a safe ride. Other factors also contributed to crash causation, such as being in proximity to a crossing or encountering a vehicle parked in the bicycle lane. A comparison between electric and traditional bicycles was enabled by the availability of data from a previous study a year earlier, which collected naturalistic cycling data from traditional bicycles using the same instrumentation as in this study. Electric bicycles were found to be ridden faster, on average, than traditional bicycles, in addition to interacting differently with other road users. The results presented in this study also suggest that countermeasures to bicycle crashes should be different for electric and traditional bicycles. Finally, increasing electric bicycle conspicuity appears to be the easiest, most obvious way to increase their safety.     

Housing design and people with severe mental illness: An observational approach to the investigation of supported housing facilities

An observational approach was employed to investigate the role played by architectural characteristics of supported housing facilities (SHF) in sustaining interactional behavior among people with severe mental illness (SMI) (N = 29) and staff (N = 27). The observations were carried out in dining areas, corridors and outdoor environments of SHF (N = 4). In order to test differences in the observed behaviors two SHFs with high physical‐environment quality (HQ) and two with low physical‐environment quality (LQ) according to the perception of people with SMI were chosen. Results showed that the dining areas of HQ better support social interactions between SHF users. No differences between the housing facilities were found concerning corridors areas, while housing facilities that provided proximity and accessibility to outdoor environments, such as those with HQ, were significantly more supportive for social interactional behavior than LQ housing. These results corroborate previous findings from this project and suggest that the characteristics of the housing design have a significant impact on the use of the environment and on the behavior patterns in the setting.     

Infants’ emotional states influence maternal behaviors during holding

Previous studies have mainly examined how maternal behaviors influence infants during holding. However it is unclear how infants influence maternal holding. This current study investigated how infants’ emotional states influence maternal holding behaviors, and whether maternal holding behaviors are also influenced by the mothers’ parenting stress. We manipulated infants’ emotional states and videotaped mothers’ holding behaviors. The mothers also completed a questionnaire about their parental stress. Results showed that mothers varied their holding behaviors depending on their infants’ emotional states. When infants were comfortable, mothers rocked them horizontally and quietly. When infants were uncomfortable, mothers rocked them vertically at a high frequency. Furthermore, some types of parenting stress were related to several types of maternal behaviors in the context of holding. These findings suggest that maternal holding behaviors are influenced by both the infants’ emotional states and the mothers’ parenting stress.     

Effects of perceived weight discrimination on willingness to adopt unhealthy behaviours: influence of genomic information

Objective: Weight-based discrimination negatively influences health, potentially via increased willingness to engage in unhealthful behaviours. This study examines whether the provision of genomic obesity information in a clinical context can lead to less willingness to engage in unhealthy eating and alcohol consumption through a mediated process including reduced perceptions of blame and discrimination.

Design: A total of 201 overweight or obese women aged 20–50 interacted with a virtual physician in a simulated clinical primary care environment, which included physician-delivered information that emphasised either genomic or behavioural underpinnings of weight and weight loss.

Main Outcome Measures: Perceived blame and weight discrimination from the doctor, and willingness to eat unhealthy foods and consume alcohol.

Results: Controlling for BMI and race, participants who received genomic information perceived less blame from the doctor than participants who received behavioural information. In a serial multiple mediation model, reduced perceived blame was associated with less perceived discrimination, and in turn, lower willingness to eat unhealthy foods and drink alcohol.

Conclusion: Providing patients with genomic information about weight and weight loss may positively influence interpersonal dynamics between patients and providers by reducing perceived blame and perceived discrimination. These improved dynamics, in turn, positively influence health cognitions.     

Electron-phonon interactions in conducting polymers

The magnetic properties of conducting polymers are investigated within a one-dimensional periodic Anderson model in which effects stemming from electron–lattice intercations are explicitly included. The effective Hamiltonian derived via bosonization exhibits ferromagnetic ground state in the intermediate coupling regime. For these ferromagnetic polymers, the results show that phononic contributions have insignificant effect on ferromagnetism.     

A validity study of existential/dialectical marital questionnaire [EDMQ]: A psychometric questionnaire for assessing marital interaction

This paper reports the successful development of a psychometric questionnaire for analyzing marital functioning and interaction based on an existential/dialectical model originally presented by Charny as the basis for a clinical model for rating couples,Existential/Dialectical Marital Profile [EDMP]. The clinical model and psychometric questionnaire address five main areas of functioning in marriage: family management, companionship, relationship and communication, attraction and sexuality, and parenting; as well as five main dimensions of marital relationship: competence, commitment, respect, power, and closeness.Presented at the Conference of the International Family Therapy Association, Amsterdam, May, 1993. This study was completed as a master's thesis by Shlomit Asineli in collaboration with and under the supervision of Professor Israel Charny at the Bob Shapell School of Social Work, Tel Aviv University.