Statistical Analysis of Trading Volumes on the Energy Market using a Local Parametric Approach

International electricity trading in the European Union (EU) is the result of a liberalized energy market. Having access to inter-regional and international energy markets grants electric power producers and industrial consumers the possibility to hedge against diverse financial and non-financial risks. Therefore, a precise forecast of the energy demand becomes imminent to improve the risk management process of the electricity market players. A local adaptive multiplicative error model (MEM) is used to analyze and forecast German electricity demand traded at the European Power Exchange (EPEX SPOT). In order to assess the adaptive forecasts’ performance, we compare them against ad hoc fixed window forecasts. We find that in the relatively short-term both methods perform equally, while in the long-term the local adaptive forecasts outperform the ad hoc fixed window forecasts

Middle Schoolers’ Texting Behaviors: A look at Individual Differences and Parental Attachment

The present study was conducted to assess individual differences in middle schoolers’ texting behaviors. Individual difference variables of interest were attachment to parents, gender, and age. Participants were recruited from a public middle school in Florida, and received permission from their parents to participate in this study. Once they provided their assent, they completed several self-reports which assessed the frequency and endorsement of texting behaviors, and their attachment to parents. The texting scale that was included for this study is based on a six sub-type texting scale which was normed on multiple groups of college students in Florida and derived from factor analyses. This scale included sub-types which were not relevant to middle school students (e.g., middle schoolers cannot drive, so questions specific to texting and driving were not included). For this study, the four relevant sub-types were included: (1) Social Connection Texting – texting to socially connect with others (2) Escapist Texting – texting to withdraw from the current environment or social situations, (3) Distracted Texting – texting in environments which distracts the user or others around them, (4) Audacious Texting – texting without regard for social or sexual norms which may be perceived as rude or aggressive. The attachment scale included questions that assess the degree to which participants show mutual trust with their parents and quality communication with parents, but also the degree to which they feel resentment or alienation from their parents. Also, participants were asked about their attitudes regarding parental influence on their technology habits, for example, “My parents ask to see my text messages,” or “If my parents read my text messages, I do not like it.” All research was conducted on-site at the middle school, so as to ensure that parental influence on participant responses was minimal. Results generally indicated that, as middle schoolers felt angrier with or alienated from their parents, they tended to text more across all four sub-types of texting that we measured. Additionally, students who did not like that their parents read their text messages reported higher frequency texting across all four sub-types of texting. Furthermore, female participants, and those higher in class rank (e.g., 8th grade) showed more frequent texting in general. Further analyses indicate that gender was a significant moderator variable for grade level, such that those who were female and higher in class rank tended to report disproportionately high texting frequencies as compared to the rest of the sample. These results provide a glimpse into an under-studied population, with most research gravitating toward problematic topics such as sexting and cyberbullying. Additionally, moderation analyses reveal some distinction among the four sub-types of texting with respect to individual differences, parent attachment, and attitudes toward parental involvement in technology use. Future research may seek to examine these differences in young populations with respect to other kinds of technology, such as video game play or social media use. In sum, this study supports the notion that technology behaviors reveal underlying psychological differences

Kv4.2 Mediates Histamine Modulation of Preoptic Neuron Activity and Body Temperature

Histamine regulates arousal, circadian rhythms, and thermoregulation. Activation of H3 histamine receptors expressed by preoptic GABAergic neurons results in a decrease of their firing rate and hyperthermia. Here we report that an increase in the A-type K+ current in preoptic GABAergic neurons in response to activation of H3 histamine receptors results in decreased firing rate and hyperthermia in mice. The Kv4.2 subunit is required for these actions in spite of the fact that Kv4.2−/− preoptic GABAergic neurons display A-type currents and firing characteristics similar to those of wild-type neurons. This electrical remodeling is achieved by robust upregulation of the expression of the Kv4.1 subunit and of a delayed rectifier current. Dynamic clamp experiments indicate that enhancement of the A-type current by a similar amount to that induced by histamine is sufficient to mimic its robust effect on firing rates. These data indicate a central role played by the Kv4.2 subunit in histamine regulation of body temperature and its interaction with pERK1/2 downstream of the H3 receptor. We also reveal that this pathway provides a mechanism for selective modulation of body temperature at the beginning of the active phase of the circadian cycle

Individual Differences of Directed Forgetting

The present study set out to evaluate the relationship between list-method directed forgetting and one’s individual differences. Previous research has found personality and emotion as having an influence in how well participants were able to intentionally forget stimuli. Participants were split into a remember group and a forget group of 22 each and tasked to memorize a list of 10 words. They were then given a free recall test and the results for individual differences such as Need for Cognition, Mini-IPIP personality test, and Beck’s Depression Inventory were analyzed. Our first hypothesis presumes that participants in the forget group will have impaired recall of words. The second hypothesis predicts that individual differences have an effect with how many words participants recall. Results in this study indicated that while individual measures proved not significant between both groups, overall recall for the first list was lower than recall for the second list. There were also indications of an interaction between amount recalled from lists and whether they were in the remember group or in the forget group. Analyses showed that remember group had a recall mean similar in lists 1 and list 2, while the forget group had a higher recall mean in list 2 and a lower recall mean in the list 1, indicating that directed forgetting had taken place in the forget group

Mapping Memories of Exiles: Combining Conventional and Alternative Cartographic Approaches

Mapping memories is useful for revealing and understanding the relationships that individuals and communities have with places, but extremely challenging given the complex and fluid nature of memories. To address these challenges, we developed a series of cartographic approaches to map the memories of exiles. In the first approach, we converted ten video recordings of life story interviews into conventional cartographic representations to identify structures and potential patterns in and between these stories. In the second, we invited those who told these stories to comment and provide feedback on the maps, triggering additional memories, untold in the original life story. In the third approach, exiles worked with artists and cartographers to develop their own spatial representations of their life stories. In this chapter, we argue that this mobilization of complementary cartographic approaches is key to mapping memories in a way that both respects the complexity of personal memories of exiles and contributes to a better understanding of individual and collective geographies