Machine Learning in Stock Price Prediction Using Long Short-Term Memory Networks and Gradient Boosted Decision Trees

Quantitative analysis has been a staple of the financial world and investing for many years. Recently, machine learning has been applied to this field with varying levels of success. In this paper, two different methods of machine learning (ML) are applied to predicting stock prices. The first utilizes deep learning and Long Short-Term Memory networks (LSTMs), and the second uses ensemble learning in the form of gradient tree boosting. Using closing price as the training data and Root Mean Squared Error (RMSE) as the error metric, experimental results suggest the gradient boosting approach is more viable. Honors Symposium: ML is an unbelievably powerful tool, and the application of ML must be subject to our biblical calling as stewards. As technology progresses to make us increasingly productive, we must direct what we produce towards ends that glorify God. Just as importantly, we must be vigilant to the great temptation to become lost in decadence. ML has wildly successful applications in the financial world that far surpass the scope of this paper, but we cannot lose sight of He who provides. A firm grounding in scripture and a healthy understanding of Providence should be enough to keep those of us who pursue the blessing of technology from becoming lost in our own grandeur

The quality of details when children and youths with intellectual disabilities are interviewed about their abuse experiences

The question for this study was to further understand how children and youths with intellectual disabilities (IDs) provide central and peripheral details when interviewed about their abuse experiences. Through a quantitative method we examined police officers' first formal investigative interviews with 32 children and youths with IDs. We analyzed the details they reported about abuse in relation to types of questions asked. The findings showed that few open-ended invitations were used and that a large number of option-posing questions were asked. The children and youths tended to agree with option-posing and suggestive statements but were nonetheless able to report important information about their abuse experiences without the ‘help’ from these potentially contaminating questions. The results of this study are limited because of the selective nature of the sample and that we did not have access to complete information about the participants specific diagnosis. Although it shows that police officers need to provide children and youths with IDs greater opportunities to report details using open-ended invitations. If they do not develop their responses when asked open-ended invitations they may be asked open directive questions to facilitate the elicitation of both central and peripheral information

Representations of Children’s Voices about Their Health in Social Services Arguments in Support of Their Decision

Research points to the importance of involving children in social investigations, since their perception of their own situation and needs may differ from what others take to be the case. There is however no specific recommendation of how children’s voices should be inscribed in such investigations. This study explores if and how children’s voices are represented in the final part of the social investigations where social workers argue in support of their decision. It has a specific focus on how children’s voices about their health are included when, at the point of initiating an investigation, concerns have been raised about their physical and psychological well-being. Inspired by a social constructionist and discursive analytical approach we analyzed 60 arguments in as many social investigations. The findings are that children’s psychological-, physical health or general well- being was mentioned in 46 of the 60 argumentations. The child’s own thoughts about his or her health were represented in12 of these 46 arguments. Instead, children’s health was mostly represented by referrals to other persons. In those 12 arguments where children’s views are presented they were reported in different ways. Their view could, for example, be sparingly reported and be used in order to confirm a previous statement or opinion. Two of the cases go more into details about what the children actually have said about their health. We conclude that if the representation of the child’s own voice is excluded it is difficult to understand if and how children’s perspective of their health has been taken into consideration in the decision process

Repetition of contaminating question types when children and youths with intellectual disabilities are interviewed

Background The present study examined the effects of repeating questions in interviews investigating the possible sexual abuse of children and youths who had a variety of intellectual disabilities. We predicted that the repetition of option-posing and suggestive questions would lead the suspected victims to change their responses, making it difficult to understand what actually happened. Inconsistency can be a key factor when assessing the reliability of witnesses. Materials Case files and transcripts of investigative interviews with 33 children and youths who had a variety of intellectual disabilities were obtained from prosecutors in Sweden. The interviews involved 25 females and 9 males whose chronological ages were between 5.4 and 23.7 years when interviewed (M = 13.2 years). Results Six per cent of the questions were repeated at least once. The repetition of focused questions raised doubts about the reports because the interviewees changed their answers 40% of the time. Conclusions Regardless of the witnesses' abilities, it is important to obtain reports that are as accurate and complete as possible in investigative interviews. Because this was a field study, we did not know which responses were accurate, but repetitions of potentially contaminating questions frequently led the interviewees to contradict their earlier answers. This means that the interviewers' behaviour diminished the usefulness of the witnesses' testimony

Child abuse, child protection and disabled children : a review of recent research

This paper reports the results of a scoping study which reviewed research about child abuse, child protection and disabled children published in academic journals between 1996 - 2009. The review was conducted using a five stage method for scoping studies. Several studies have revealed a strong association between disability and child maltreatment, indicating that disabled children are significantly more likely to experience abuse than their non-disabled peers. Those with particular impairments are at increased risk. There is evidence that the interaction of age, gender and/or socio-cultural factors with impairment results in different patterns of abuse to those found among non-disabled children although the reasons for this require further examination. It appears that therapeutic services and criminal justice systems often fail to take account of disabled children's needs and heightened vulnerability. In Britain, little is known about what happens to disabled children who have been abused and how well safeguarding services address their needs. Very few studies have sought disabled children's own accounts of abuse or safeguarding. Considerable development is required, at both policy and practice level, to ensure that disabled children's right to protection is upheld. The paper concludes by identifying a number of aspects of the topic requiring further investigation

Research Expanding Current Understandings of Bullying in Sweden

This paper discusses the on-going research on the phenomenon of bullying in the Department of Child andYouth Studies at Stockholm University. The paper describes the reasons, and how to contribute with anunderstanding of bullying as a social group phenomenon, and specifically focuses on inductive ethnographicand cyberethnographic approaches toward peer-to-peer interactions in schools, preschools and on theInternet. The understanding of this phenomenon is based on a Swedish interdisciplinary approach whichincludes children’s perspectives. The objective is to explore bullying as a complex social group phenomenonwhich allows for a focus on the process of bullying, thus creating an opportunity for the enhancement of theunderstanding of inter- and intra-connected actions and perspectives. This article is intended to contribute toa discussion on a broadening of the conceptualization of the phenomenon of bullying

Living with children who have coeliac disease: a parental perspectivec ch_1273 484..489

Abstract Background This study explores how a child's coeliac disease (CD) influences the daily life o

From Language to Motor Gavagai: Unified Imitation Learning of Multiple Linguistic and Non-linguistic Sensorimotor Skills

International audienceWe identify a strong structural similarity between the Gavagai problem in language acquisition and the problem of imitation learning of multiple context-dependent sensorimotor skills from human teachers. In both cases, a learner has to resolve concurrently multiple types of ambiguities while learning how to act in response to particular contexts through the observation of a teacher's demonstrations. We argue that computational models of language acquisition and models of motor skill learning by demonstration have so far only considered distinct subsets of these types of ambiguities, leading to the use of distinct families of techniques across two loosely connected research domains. We present a computational model, mixing concepts and techniques from these two domains, involving a simulated robot learner interacting with a human teacher. Proof-of-concept experiments show that: 1) it is possible to consider simultaneously a larger set of ambiguities than considered so far in either domain; 2) this allows us to model important aspects of language acquisition and motor learning within a single process that does not initially separate what is "linguistic" from what is "non-linguistic". Rather, the model shows that a general form of imitation learning can allow a learner to discover channels of communication used by an ambiguous teacher, thus addressing a form of abstract Gavagai problem (ambiguity about which observed behavior is "linguistic", and in that case which modality is communicative). Keywords: language acquisition, sensorimotor learning, imitation learning, motor Gavagai problem, discovering linguistic channels, robot learning by demonstration

A social learning formalism for learners trying to figure out what a teacher wants them to do

International audienceThis article presents a theoretical foundation for approaching the problem of how a learner can infer what a teacher wants it to do through strongly ambigu-ous interaction or observation. The article groups the in-terpretation of a broad range of information sources un-der the same theoretical framework. A teacher's motion demonstration, eye gaze during a reproduction attempt, pushes of "good"/"bad" buttons and speech comment are all treated as specific instances of the same general class of information sources. These sources all provide (partially and ambiguously) information about what the teacher wants the learner to do, and all need to be interpreted con-currently. We introduce a formalism to address this chal-lenge, which allows us to consider various strands of pre-vious research as different related facets of a single gener-alized problem. In turn, this allows us to identify impor-tant new avenues for research. To sketch these new direc-tions, several learning setups are introduced, and algorith-mic structures are introduced to illustrate some of the prac-tical problems that must be overcome