Mixed Generation Sensitivity Analysis: An Optimal Scenario Study

There are several generating units available to meet the load demand on any given day. The mixed‐integer programme case engages generating units that can be shut down or operated between minimum and maximum output levels within a specific time demand block. An examination of these conditions espouses the utilization of renewable energy technology as a reliable power generation source and its effectiveness and augmentation in a robust, heavily subjugated thermal generation system. The mixed‐integer problem has the predisposition to generate many subproblems during the computation. However, with careful selection of the parameters in the model, the challenges are easily overcome. Hydroelectric energy is significant from an operational standpoint as it requires little or no ramp‐up time, commonly found in many combustion technologies. The essential load‐following capability, peaking capacity and voltage stability attributes render hydroelectric energy as a significant part in ensuring reliable electricity service and in meeting customer needs in a market‐driven industry. When this renewable resource is combined with the thermal generation, an improved reliability function is apparent. Yet, in order to minimize the environmental effects inherent in this type of energy resource, the renewable power supply is expected to produce an effectual, consistent output. The integration of renewable generation within the electrical system entails intricate analysis of the transmission line upgrades throughout the system. These upgrades are designed to relieve congestion, improve reliability and provide voltage support by thoroughly evaluating the alternatives to accommodate the new expansion efforts. This paper examines the system integration of renewable generators, via simulated studies, in the context of electrical operations from the hydroelectric generation perspective. Copyright © 2014 John Wiley & Sons, Ltd.     

Inclusion of Alternative and Complementary Therapies in CACREP Training Programs

Abstract

Given a heightened focus within the mental health profession on creative, complementary, and alternative practices, the authors surveyed CACREP programs with respect to their inclusion of such approaches in counselor training. For the purpose of this study, these approaches were designated as complementary and alternative methods (CAM) and defined as those therapeutic practices that fall outside of the established traditional realm of medical, psychiatric, and psychological practice (hypnotherapy, breath work, meditation, Qigong, Reiki, Thought Field Therapy, etc.). Sixty-two programs responded. Over half (54%) stated that they currently include these approaches in course offerings. This article includes a discussion of creativity, expressive arts, and energy psychology as they relate to complementary and alternative therapies in mental health and medicine.     

时间知觉的脑机制:时钟模型的困境和新导向

长期以来人们认为神经系统是通过类似于时钟的方式来实现对一段时间的知觉的,并认为多巴胺能系统(基地神经节)和时钟的快慢有关。与多巴胺信号有关的药物的动物实验的结果以及帕金森氏症(parkinson’s disease)患者的行为表现被看作是支持以上看法的证据。然而,最近的大量研究对这个理论提出了挑战,结合行为研究和脑机制研究的新成果,研究者提出了知觉信息可以通过神经活动状态或加工中的能量消耗来表达。     

Animal model of posterior cingulate cortex hypometabolism implicated in amnestic MCI and AD

The posterior cingulate cortex (PCC) is the brain region displaying the earliest sign of energy hypometabolism in patients with amnestic mild cognitive impairment (MCI) who develop Alzheimer’s disease (AD). In particular, the activity of the mitochondrial respiratory enzyme cytochrome oxidase (C.O.) is selectively inhibited within the PCC in AD. The present study is the first experimental analysis designed to model in animals the localized cortical C.O. inhibition found as the earliest metabolic sign of early-stage AD in human neuroimaging studies. Rats were used to model local inhibition of C.O. by direct injection of the C.O. inhibitor sodium azide into the PCC. Learning and memory were examined in a spatial holeboard task and brains were analyzed using quantitative histochemical, morphological and biochemical techniques. Behavioral results showed that sodium azide-treated rats were impaired in their memory of the baited pattern in probe trials as compared to their training scores before treatment, without non-specific behavioral differences. Brain analyses showed that C.O. inhibition was specific to the PCC, and sodium azide increased lipid peroxidation, gliosis and neuron loss, and lead to a network functional disconnection between the PCC and interconnected hippocampal regions. It was concluded that impaired memory by local C.O. inhibition in the PCC may serve to model in animals a metabolic lesion similar to that found in patients with amnestic MCI and early-stage AD. This model may be useful as an in vivo testing platform to investigate neuroprotective strategies to prevent or reduce the amnestic effects produced by posterior cingulate energy hypometabolism.     

Paul Tillich and Pitirim A. Sorokin on Love

An analysis of Paul Tillich's three‐volume Systematic Theology and Pitirim A. Sorokin's The Ways and Power of Love: Types, Factors, and Techniques of Moral Transformation reveals how a metaphysical dialogue on God and love contributes to scientific and theological scholarship on altruism. This article focuses on similarities and differences in Tillich and Sorokin. Similarities include a belief in the importance of the ontological/love connection and the conclusion that a special state, ecstasy, is integral to the experience of genuine love. Differences serve to complement rather than negate. For example, Tillich's recognition that ecstatic connections with the divine within finitude are fragmentary balances Sorokin's view that these ecstatic peaks are reached only by the few. The similarities give resonance and point to the overall creation, while the differences often serve as counterpoint to balance the ideas of the scientist and the theologian.     

Extending Energy Optimization in Goal-Directed Aiming from Movement Kinematics to Joint Angles

Energy optimization in goal-directed aiming has been demonstrated as an undershoot bias in primary movement endpoint locations, especially in conditions where corrections to target overshoots must be made against gravity. Two-component models of upper limb movement have not yet considered how joint angles are organized to deal with the energy constraints associated with moving the upper limb in goal-directed aiming tasks. To address this limitation, participants performed aiming movements to targets in the up and down directions with the index finger and two types of rod extensions attached to the index finger. The rod extensions were expected to invoke different energy optimizing strategies in the up and down directions by allowing the distal joints the opportunity to contribute to end effector displacement. Primary movements undershot the farthest target to a greater extent in the downward direction compared to the upward direction, showing that movement kinematics optimize energy expenditure in consideration of the effects of gravity. As rod length increased, shoulder elevation was optimized in movements to the far-up target and elbow flexion was optimally minimized in movements to the far-down target. The results suggest energy optimization in the control of joint angles independent of the force of gravity.     

Melting point depression method for determining the solid–liquid interfacial energy of metal elements: theoretical validation and updated compilation of data

Comparative analyses of the crystal nucleation method and the melting point depression (MPD) method for measuring the solid–liquid interface energy γ_sl are carried out. The MPD method is found more reliable and has several advantages from experiment through data analysis to theoretical generalisation. The MPD data in use, all reported before the 1970s, are updated with the derived γ_sl re-compiled. Finally, by invoking a melting model that we developed recently, an equation for calculating γ_sl is proposed on basis of the melting point depression method.     

Transcending the evidentiary boundary: Prediction error minimization,embodied interaction,and explanatory pluralism

In a recent paper, Jakob Hohwy argues that the emerging predictive processing (PP) perspective on cognition requires us to explain cognitive functioning in purely internalistic and neurocentric terms. The purpose of the present paper is to challenge the view that PP entails a wholesale rejection of positions that are interested in the embodied, embedded, extended, or enactive dimensions of cognitive processes. I will argue that Hohwy’s argument from analogy, which forces an evidentiary boundary into the picture, lacks the argumentative resources to make a convincing case for the conceptual necessity to interpret PP in solely internalistic terms. For this reason, I will reconsider the postulation and explanatory role of the evidentiary boundary. I will arrive at an account of prediction error minimization and its foundation on the free energy principle that is fully consistent with approaches to cognition that emphasize the embodied and interactive properties of cognitive processes. This gives rise to the suggestion that explanatory pluralism about the application of PP is to be preferred over Hohwy’s explanatory monism that follows from his internalistic and neurocentric view of predictive cognitive systems.     

工作中的能量:基于多层面表现形态的对流转化

工作中能量的研究经历了个体-交互-集体的发展历程。基于权变视角,本文对工作中能量的表现形态进行内涵解读与构念辨析,依托互动仪式理论,构建并解读能量表现形态的对流转化模型,为组织中工作能量的维持和补充提供思考。未来研究应重视关系能量与集体能量在组织中产生的双重效应,开展工作中能量构念的跨层面本土化实证研究。     

心脑血管疾病防治观的上游与下游

促发心脑血管疾病的多重危险因素属于关系链的上游,糖尿病和代谢综合征属于中游,而心绞痛、心肌梗死和脑卒中属于疾病的下游,干预下游是一种高成本高风险的模式,如将干预重点转移到上游则风险不大,成本低廉,有充分的选择余地。