Although the cognitive model of depression has evolved appreciably since its first formulation over 40 years ago, the potential interaction of genetic, neurochemical, and cognitive factors has only ...recently been demonstrated. Combining findings from behavioral genetics and cognitive neuroscience with the accumulated research on the cognitive model opens new opportunities for integrated research. Drawing on advances in cognitive, personality, and social psychology as well as clinical observations, expansions of the original cognitive model have incorporated in successive stages automatic thoughts, cognitive distortions, dysfunctional beliefs, and information-processing biases. The developmental model identified early traumatic experiences and the formation of dysfunctional beliefs as predisposing events and congruent stressors in later life as precipitating factors. It is now possible to sketch out possible genetic and neurochemical pathways that interact with or are parallel to cognitive variables. A hypersensitive amygdala is associated with both a genetic polymorphism and a pattern of negative cognitive biases and dysfunctional beliefs, all of which constitute risk factors for depression. Further, the combination of a hyperactive amygdala and hypoactive prefrontal regions is associated with diminished cognitive appraisal and the occurrence of depression. Genetic polymorphisms also are involved in the overreaction to the stress and the hypercortisolemia in the development of depression-probably mediated by cognitive distortions. I suggest that comprehensive study of the psychological as well as biological correlates of depression can provide a new understanding of this debilitating disorder.
International relationships are increasingly critical to business performance. Yet despite a recent surge in international research on relationship marketing (RM), it is unclear whether or how RM ...should be adapted across cultures. The authors adopt Hofstede's dimensions of culture to conduct a comprehensive, multivariate, metaregression analysis of 47,864 relationships across 170 studies, 36 countries, and six continents. To guide theory, they propose four tenets that parsimoniously capture the essence of culture's effects on RM. Study 1 affirms these tenets and emphasizes the importance of taking a fine-grained perspective to understand the role of culture in RM because of the high degree of heterogeneity across different cultural dimensions and RM linkages. For example, the magnitude of individualism's effect is 71% greater on RM than other cultural dimensions, whereas masculinity has almost no effect; however, accounting only for individualism ignores significant moderating effects of power distance and uncertainty avoidance dimensions. To guide managers, Study 2 adopts a country-level approach and reveals that RM is much more effective outside the United States such that relationships are 55% more effective, on average, for increasing business performance in Brazil, Russia, India, and China.
Poor social and vocational outcomes have long been observed in schizophrenia. Two of the most consistent predictors are negative symptoms and cognitive impairment. We investigate the hypothesis that ...cognitive content-defeatist beliefs regarding performance-provides a link between cognitive impairment, negative symptoms, and poor functioning in schizophrenia. A total of 77 individuals (55 patients diagnosed with schizophrenia or schizoaffective disorder and 22 healthy controls) participated in a cross-sectional study of psychopathology. Tests of memory, abstraction, attention, and processing speed, as well as current psychopathology, functioning, and endorsement of defeatist beliefs, were employed. Greater neurocognitive impairment was associated with elevated defeatist belief endorsement, higher negative symptom levels, and worse social and vocational functioning. Notably, statistical modeling indicated that defeatist belief endorsements were mediators in the relationship between cognitive impairment and both negative symptoms and functioning. These effects were independent of depression and positive symptom levels. The results add to the emerging biopsychosocial understanding of negative symptoms and introduce defeatist beliefs as a new psychotherapeutic target.
•Risk analysis addresses epistemic uncertainties in loading scenarios, quality of manufacturing or workmanship, human errors.•Risk analysis contributes a latent failure probability to structural ...design problem.•Optimal structural design largely dependent on latent failure probabilities.•System Reliability‐based Design Optimization and Risk Optimization formulations addressed.
In spite of extended recent interest in System Reliability-Based Design Optimization (System RBDO) and life-cycle cost or Risk Optimization (RO), there is a lack of published studies on optimal design of redundant hyperstatic systems with objective consideration of (a) progressive collapse and (b) the impact of epistemic uncertainties. This paper investigates the fundamental aspects of the problem, by addressing the optimal design of simple two-bar active and passive redundant systems. Progressive collapse is objectively addressed, differentiating consequences of direct collapse of statically determinate structures, and progressive collapse of redundant, statically indeterminate structures. A comprehensive study is performed, considering material post-failure behavior (fragile-ductile), strength correlation, dynamic amplification factors in load re-distribution, and material strength ratios. Physical uncertainty in material strengths and loads is considered. However, it is well known that reliability of a structural system also depends on nonstructural factors, or factors beyond structural design, such as unanticipated loading, manufacturing quality, quality of workmanship and human errors. These factors can be taken into account in an encompassing risk analysis, which accounts for physical and epistemic uncertainties, and which contributes a fixed latent failure probability to the structural optimization problem. Results presented herein show that the latent failure probability is the single most important parameter in determining optimal solutions, in System RBDO and in RO solutions. When the latent failure probability is smaller than target (System RBDO) or optimal (RO) failure probabilities, there is an equivalence between redundant and non-redundant (hyperstatic and isostatic) designs. However, when the latent reliability is smaller than target or optimal reliabilities, optimal designs become necessarily redundant (hyperstatic); as the only way to make system reliability larger than the latent reliability is by making structural systems redundant. This result is widely known in context of system reliability, but has been overlooked in past studies involving structural System RBDO and Risk Optimization.
•MILP optimization model for operation and investment of residential energy systems.•Influence of heat pump systems on photovoltaic self-consumption and self-sufficiency.•Assessment of economical ...efficiency of flexibility options for heat pump systems.•PV as a robust measure to decrease TCO of heat pumps under scenarios assumptions.
A rapid growth in interest in self-consumption of electricity generated by rooftop photovoltaic (PV) systems has been observed in recent years. This is fueled by decreasing levelized cost of electricity and feed-in tariffs for PV-systems as well as by increasing electricity prices, especially in the residential sector. Besides PV-battery systems, electrical heat pumps are a promising measure to increase self-consumption of electricity generated by distributed generation technologies in residential dwellings. However, little scientific research on the ability of heat pump systems to increase self-consumption of PV-electricity has been carried out so far. Therefore in this paper a mixed integer linear programing model for the optimal operation, system configuration and sizing for heat pump based house energy systems is developed and applied under different scenario conditions. The results show that the dimensioning of the heat pump is hardly influenced by the scenario assumptions, whereas the optimal sizing of PV is strongly dependent on the scenarios and in particular on the electrical load profiles. Over all scenario variations, the sizing of electrical and thermal storages is demand-driven and hardly any interdependencies with respect to optimal sizing can be observed between the different storage technologies. The availability of feed-in-tariffs generally yields large PV systems with high levels of self-sufficiency but low levels of self-consumption. Stricter feed-in-limitations lead to a reduction of the optimal PV systems size, but not to an increase in the optimal size of storage technologies. Over a wide range of base scenarios and scenario variations PV systems as well as additional flexibility options are part of the optimal system configuration, rendering it a promising and robust measure to decrease the operating cost of heat pump systems in the future. The results obtained in this study can provide valuable guidelines for manufacturers, installers and end-customers for the design of cost-effective self-consumption driven heat pump systems in the future.
Abstract
Brand leaders possess tremendous agency, with the ability to shape a sweeping variety of outcomes. Does this fact confer psychological value to consumers? We posit that external conditions ...that undermine feelings of personal control cause consumers to affiliate more with brand leaders. This occurs because affiliating with such high-agency brands gives consumers a sense of personal agency and thereby restores feelings of control. An initial study using archival data from nearly 18,000 consumers reporting on over 1,200 brands documents real-world effects that are consistent with these propositions. Four follow-up experiments demonstrate the effect of low control on brand leader (vs. nonleader) purchase intentions using direct manipulations in controlled settings, capture the underlying process, and rule out alternative explanations. This research thus reveals that the psychology of personal control underlies a process that benefits brand leaders.
The CHEOPS mission Benz, W.; Broeg, C.; Fortier, A. ...
Experimental astronomy,
2021, Letnik:
51, Številka:
1
Journal Article, Web Resource
Recenzirano
Odprti dostop
The CHaracterising ExOPlanet Satellite (CHEOPS) was selected on October 19, 2012, as the first small mission (S-mission) in the ESA Science Programme and successfully launched on December 18, 2019, ...as a secondary passenger on a Soyuz-Fregat rocket from Kourou, French Guiana. CHEOPS is a partnership between ESA and Switzerland with important contributions by ten additional ESA Member States. CHEOPS is the first mission dedicated to search for transits of exoplanets using ultrahigh precision photometry on bright stars already known to host planets. As a follow-up mission, CHEOPS is mainly dedicated to improving, whenever possible, existing radii measurements or provide first accurate measurements for a subset of those planets for which the mass has already been estimated from ground-based spectroscopic surveys. The expected photometric precision will also allow CHEOPS to go beyond measuring only transits and to follow phase curves or to search for exo-moons, for example. Finally, by unveiling transiting exoplanets with high potential for in-depth characterisation, CHEOPS will also provide prime targets for future instruments suited to the spectroscopic characterisation of exoplanetary atmospheres. To reach its science objectives, requirements on the photometric precision and stability have been derived for stars with magnitudes ranging from 6 to 12 in the V band. In particular, CHEOPS shall be able to detect Earth-size planets transiting G5 dwarf stars (stellar radius of 0.9
R
⊙
) in the magnitude range 6 ≤
V
≤ 9 by achieving a photometric precision of 20 ppm in 6 hours of integration time. In the case of K-type stars (stellar radius of 0.7
R
⊙
) of magnitude in the range 9 ≤
V
≤ 12, CHEOPS shall be able to detect transiting Neptune-size planets achieving a photometric precision of 85 ppm in 3 hours of integration time. This precision has to be maintained over continuous periods of observation for up to 48 hours. This precision and stability will be achieved by using a single, frame-transfer, back-illuminated CCD detector at the focal plane assembly of a 33.5 cm diameter, on-axis Ritchey-Chrétien telescope. The nearly 275 kg spacecraft is nadir-locked, with a pointing accuracy of about 1 arcsec rms, and will allow for at least 1 Gbit/day downlink. The sun-synchronous dusk-dawn orbit at 700 km altitude enables having the Sun permanently on the backside of the spacecraft thus minimising Earth stray light. A mission duration of 3.5 years in orbit is foreseen to enable the execution of the science programme. During this period, 20% of the observing time is available to the wider community through yearly ESA call for proposals, as well as through discretionary time approved by ESA’s Director of Science. At the time of this writing, CHEOPS commissioning has been completed and CHEOPS has been shown to fulfill all its requirements. The mission has now started the execution of its science programme.
In the 40 years since Aaron Beck first proposed his cognitive model of depression, the elements of this model--biased attention, biased processing, biased thoughts and rumination, biased memory, and ...dysfunctional attitudes and schemas--have been consistently linked with the onset and maintenance of depression. Although numerous studies have examined the neural mechanisms that underlie the cognitive aspects of depression, their findings have not been integrated with Beck's cognitive model. In this Review, we identify the functional and structural neurobiological architecture of Beck's cognitive model of depression. Although the mechanisms underlying each element of the model differ, in general the negative cognitive biases in depression are facilitated by increased influence from subcortical emotion processing regions combined with attenuated top-down cognitive control.
Celotno besedilo
Dostopno za:
DOBA, IJS, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
Using a firm-level survey database covering 48 countries, we investigate how financial and institutional development affects financing of large and small firms. Our database is not limited to large ...firms but includes small and medium-size firms and data on a broad spectrum of financing sources, including leasing, supplier, development, and informal finance. Small firms and firms in countries with poor institutions use less external finance, especially bank finance. Protection of property rights increases external financing of small firms significantly more than of large firms, mainly due to its effect on bank finance. Small firms do not use disproportionately more leasing or trade finance compared with larger firms, so these financing sources do not compensate for lower access to bank financing of small firms. We also find that larger firms more easily expand external financing when they are constrained than small firms. Finally, we find suggestive evidence that the pecking order holds across countries.
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