On the Stationarity Time of a Vehicle-to-Infrastructure Massive Radio Channel in a Line-of-Sight Suburban Environment.

Massive multiple-input multiple-output (mMIMO) communication systems are a pillar technology for 5G. However, the wireless radio channel models relying on the assumption of wide-sense stationary uncorrelated scattering (WSSUS) may not always be valid for dynamic scenarios. Nonetheless, an analysis of the stationarity time that validates this hypothesis for mMIMO vehicular channels as well as a clear relationship with the scattering properties is missing in the literature. Here, time-varying single-user mMIMO radio channels were measured in a suburban environment at the 5.89 GHz vehicular band with a strong Line-of-Sight (LOS) to study the non-WSSUS and large scale characteristics of the vehicle-to-infrastructure (V2I) link. The generalized local scattering function (GLSF), computed from the sampled channels, was used to derive (1) the spatial distribution of the stationarity time using the channel correlation function (CCF) and empirical collinearity methods and (2) the root mean square delay/angular spread and coherence time/bandwidth values from the projected power delay profile (PDP) and Doppler power spectra (DPS). The results highlight the high degree of correlation between the spatial distribution of the stationarity time and the scattering properties along the measurement route.

Process-oriented dynamic group psychotherapy for depression as a teaching modality in a family medicine residency program- A pilot study.

Background and Objectives This pilot study provides a description and evaluation of process-oriented dynamic group psychotherapy for depression as a teaching modality for family medicine residents. The main purpose of using this modality was to teach family medicine residents a variety of psychological clinical skills. A secondary benefit of this modality was to provide in-house, primary care treatment to depressed patients, although the efficacy of this was not evaluated in the present study. Methods A 10-item, self-report, Likert-type questionnaire was administered to a convenience sample of family medicine residents who had participated in the program. Results Completed questionnaires were received from 100% of the family medicine resident participants. Responses to the questionnaires indicate that the residents felt they acquired a variety of clinical skills from the training modality, to include developing active listening and interviewing skills; methods to improve the doctor-patient relationship; increased skills in empathy, intuitive processes, and emotional support; a depth understanding of how intra-psychic conflicts and interpersonal problems contribute to depression; how to give effective feedback that promotes behavioral change; and how to place interventions at the appropriate level of change. Eighty-eight percent of residents indicated they would recommend this learning modality to a family medicine physician colleague. Conclusions The family medicine residents' responses to the questionnaires indicate that they perceived process-oriented dynamic group psychotherapy for depression as a constructive and beneficial modality for both patient care and learning a variety of clinical skills.

Psychoanalytic principles as a heuristic framework to bridge the gap between psychology and the law in SVP evaluations: Assessing emotional and volitional impairment.

The legal concepts of emotional and volitional impairment in SVP evaluations are vague and ill-defined. This article reviews the legal terms of emotional and volitional impairment as they have been contemplated in extant SVP statutes, SVP case law, logical constructions, and limited empirical studies. To bridge the gap between psychiatry and the law, a broad, theory-based heuristic framework is furnished for understanding emotional and volitional impairment at a deep psychological (and intra-psychic) level. Specifically discussed are the concepts of transference, repetition compulsion, fixation, cathexis, regression, identification with the aggressor, and the object-relations and self-psychology concepts related to a loss of possession of the self.