Performance analysis of free piston Stirling engine based on the phasor notation method

The free piston Stirling engine (FPSE) is a couple system of dynamics and thermodynamics. Due to the complicated and interactive relationships between the dynamic parameters and thermodynamic parameters, the performance of the FPSE is always difficult to predict and evaluate. The phasor notation method is proposed based on a thermodynamic-dynamic coupled model of a beta-type FPSE in this paper. The output power and efficiency under the different heating temperature and charging pressure are analysed and compared. In addition, based on the Sage numerical model, the influences of heating temperature and charging pressure on the pistons’ displacement amplitudes, power work and efficiency are revealed. This study can provide the assistance for the performance analysis, prediction and optimization of the FPSE.

A novel and simple technique for correcting localised rotations in the early alignment stage

Correcting severe tooth rotations can be challenging. There are many ways to de-rotate teeth with fixed or removable appliances. Mechanically, the best and most effective way is one that produces a two-force couple system to rotate a tooth around its centre of rotation (longitudinal axis). The aim of this article was to introduce a simple and efficient technique using a closed coil to correct localised tooth rotations in the early alignment stage, utilising a simple two-force couple system. Furthermore, some of the biomechanical principles concerning de-rotation will be revisited.

Wonder Findings of Number of Cells in a Body Including Sexual Cells, Remedy of Corona Virus, Increase of Memory, and other Cells by Couple System

It is difficult to calculate fixed data of a number of cells in a body. It is varying on time and age of life. The time increasing that cells are increasing, though we can estimate the number of cells in various nerves in a body, brain, sexual platform, etc through a couple system. The coupling system is a new system of the finding of peculiar series of numbers [1], which is applies to many fields. In the cases of Medical Science, it has been observed by calculation that due to disturbing of the couple caused different difficulties in the body. A smooth Coupling cell may produce a healthy body, and it is possible to increase memory by adding particular cells number in a loss position. The coupling system is interesting that, can explain the real mechanism of every cell. There are many types of cells in a living body. Almost all cells follow a couple of system. The coupling system performs coupling between two (say, A, 1st party & B, 2nd party) with keeping relation as 3rd party, denoted by R (Relative Number) mathematically.

Strengthening Vicarious Resilience in Adult Survivors of Childhood Sexual Abuse: A Narrative Approach to Couples Therapy

Childhood sexual abuse (CSA) is correlated with numerous adverse effects, both intrapersonal and interpersonal. Couples where one or more partners is a CSA survivor often report problems in social/relational adjustment, emotional expressiveness, revictimization, low relationship satisfaction and stability, and sexual dysfunction. Despite the adverse effects of CSA, some individuals with a history of CSA retain typical levels of functioning, and data from studies of resilience in CSA survivors suggest the importance of social and relational support for favorable outcomes. Resilience is not only an individual factor but also a social, ecological process, and research on vicarious resilience in therapist–client relationships suggests that resilience can be transmitted across relationship systems through a combination of witnessing resilience stories and beliefs about the possibility of resilience and its transmission. We suggest that in romantic partnerships (including nonheteronormative configurations) where one or more partners has a history of CSA, narrative couples therapy is well suited to address the systemic impacts of trauma and resilience by facilitating the transmission of each partner’s resilience to the other. Two narrative interventions, mapping and definitional ceremonies, are suggested to facilitate the transmission of resilience within the couple system through the sharing and witnessing of each other’s subjugated resilience narratives, thereby promoting a re-authored preferred identity based on acceptance, strength, and agency rather than shame, avoidance, and interpersonal difficulty.

The Effects of Alcohol and Substance Use on a Couple System

This case study aims to analyze the effects of alcohol and substance use on a couple system. An African American, heterosexual couple was selected for analysis due to dual alcohol and substance use negatively impacting their relationship in addition to generalized anxiety and major depressive disorder. The reliance of alcohol and substance use to cope with relational stressors and mental health systems was detrimental to the relationship. The clients initially presented with trust issues stemming from infidelity; throughout the course of treatment, it became apparent the alcohol and substance use was hindering the couple’s ability to repair trust and meet their other clinical goals. The couple struggled to find alternative means of coping outside of alcohol and substance use, exacerbating their toxic patterns of interaction. This study displays how cognitive behavioral therapy interventions can be implemented within alcohol and substance abuse context to create change in a couple system.

Dyadic Dynamics in Young Couples Reporting Dating Violence

This study uses a combination of observational methods and dyadic data analysis to understand how boyfriends’ and girlfriends’ perpetration of dating violence (DV) may shape their own and their partners’ problem-solving communication behaviors. A sample of 39 young heterosexual couples aged between 15 and 20 years (mean age = 17.8 years) completed a set of questionnaires and were observed during a 45-min dyadic interaction, which was coded using the Interactional Dimension Coding System (IDCS). Results suggest that neither boyfriends’ nor girlfriends’ own perpetration of DV was related to their display of positive and negative communication behaviors. However, estimates revealed significant partner effects, suggesting that negative communication behaviors displayed by girls and boys and positive communication behavior displayed by girls were associated to their partner’s DV but not to their own. Such results confirm the need to shift our focus from an individual perspective to examining dyadic influences and processes involved in the couple system and the bidirectionality of violent relationships.

Response of the maxillary dentition to a statically determinate one-couple system with tip-back mechanics: A prospective clinical trial

ABSTRACT Objective: To quantify the effects of tip-back mechanics on the maxillary first molars and incisors. Materials and Methods: Sixteen subjects with Class II end-on malocclusion were treated with an intrusion arch to achieve distalization of the maxillary molar through tip-back mechanics. Lateral cephalograms were taken prior to molar tip-back (T1), after molar tip-back (T2), and after molar root uprighting (T3). Data were analyzed using the Friedman’s and Wilcoxon signed rank tests to evaluate differences in time points (P ≤ .016). Results: The maxillary first molar distalized 1.53 mm (P = .001) with 6.65° (P = .001) of distal tipping and 0.86 mm (P = .001) of extrusion at T2. Minor relapse of the first molar (mesial direction) was seen at T3. The maxillary incisors flared labially 0.4 mm, and the incisor root apex moved palatally 1.19 mm (P = .005) at T2. At T3, the incisor root apex moved palatally 1.5 mm (P = .003) from T1. An angular change from T1 of 3.31° (P = .008) and 3.53° (P = .014) was seen at T2 and T3, respectively, as a result of palatal root movement of the maxillary incisors. Conclusions: A significant amount of distalization of maxillary molars was attained at the crown level with tip-back mechanics. Palatal root angulation change was significant in the incisors with minimal anteroposterior movement of the incisal edge.