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An Extension of Slow Feature Analysis for Nonlinear Blind Source Separation
No full textWe present and test an extension of slow feature analysis as a novel approach to nonlinear blind source separation. The algorithm relies on temporal correlations and iteratively reconstructs a set of statistically independent sources from arbitrary nonlinear instantaneous mixtures. Simulations show that it is able to invert a complicated nonlinear mixture of two audio signals with a reliability of more than \%. The algorithm is based on a mathematical analysis of slow feature analysis for the case of input data that are generated from statistically independent sources
Effectiveness of teaching styles on learning motivation
No full textIt is common wisdom in the area of adult education that the educator's relational attitudes influence knowledge construction on the part of the learners. It is the aim of this paper to contribute to an empirical evaluation of this idea. We identified four basic relational attitudes of the educator's, namely: (i) favoring cooperation, (ii) directivity, (iii) flexibility, and (iv) ability to focus on the participants. Then, we identified 31 prototypical types of behavior that are commonly enacted by educators in the classroom. We performed multiple observations of several adult education courses, scoring each educator on the list of 31 behavior types. We performed factor analysis and then correlated such scores and the corresponding attitudes to indexes of the participants' levels of attention, participation and comprehension. The results corroborate our hypotheses. Interestingly, several differences was found between novice and expert teachers. Overall, our findings support the socio-constructivist idea that knowing is a transformational process of learning that takes place within a relational context.\u
A Logical Defence of Maher's Model of Polythematic Delusions
No full textWe proceed to describe a model for the formation and maintenance of polythematic delusions encountered in schizophrenia, which is in adequacy with Brendan Maher's account of delusions. Polythematic delusions are considered here as the conclusions of arguments triggered by apophenia that include some very common errors of reasoning such as post hoc fallacy and confirmation bias. We describe first the structure of reasoning which leads to delusions of reference, of telepathy and of influence, by distinguishing between the primary, secondary, tertiary and quaternary types of delusional arguments. These four levels of arguments correspond to a stage the nature of which is respectively instantial, inductive, interpretative at a monothematic level and interpretative at a polythematic level. We also proceed to identify accurately the fallacious steps in the corresponding reasoning. We expose then the role of apophenia in the elaboration of delusional ideas. Lastly, we describe the role played by the hallucinations in the present model
Negative affective environments improve complex solving performance
No full textBased on recent affect-cognition theories (Bless et al., 1996; Fiedler, 2001; Sinclair, 1988), the present study predicted and showed a differentiated influence of nice and nasty environments on complex problem solving (CPS). Environments were constructed by manipulating the target value ‘capital’ of a complex scenario: Participants in the nice environment (N=42) easily raised the capital and received positive feedback, whereas those in the nasty environment (N=42) hardly enhanced the capital and got negative feedback. The results showed that nasty environments increased negative and decreased positive affect. The reverse was true for nice environments. Furthermore, nasty environments influenced CPS by leading to a higher information retrieval and a better CPS performance. Surprisingly, the influence of environment on CPS was not mediated through affect (cf. Soldat & Sinclair, 2001), as recent affect-cognition theories suggest. The missing influence of affect and the strong impact of environment are discussed
SMEs; Virtual research and development (R&D) teams and new product development: A literature review
No full textSmall and medium-sized enterprises (SMEs) are indeed the engines of global economic growth. Their continued growth is a major subject for the economy and employment of any country. Towards that end, virtual research and development (R&D) could be a viable option to sustain and ease the operations of SMEs. However, literature shows there has not been a great deal of research into the diverse characteristic of virtual R&D teams in SMEs. This article provides a comprehensive literature review on different aspects of virtual R&D teams collected from the reputed publications. The purpose of the literature review is to provide an outline on the structure and dynamics of R&D collaboration in SMEs. Specifying the rationale and relevance of virtual teams, the relationship between virtual R&D team for SMEs and new product development (NPD) has been examined. It concludes with identifying the gaps and feebleness in the existing literature and calls for future research in this area. It is argued to form of virtual R&D team deserves consideration at top level management for venturing into the new product development within SMEs
Multivariate methods and small sample size: combining with small effect size
No full textThis manuscript is the author's response to: "Dochtermann, N.A. & Jenkins, S.H. Multivariate methods and small sample\ud
sizes, Ethology, 117, 95-101." and accompanies this paper: "Budaev, S. Using principal components and factor analysis in animal behaviour research: Caveats and guidelines. Ethology, 116, 472-480"\u
SNARE proteins as molecular masters of interneuronal communication
No full textIn the beginning of the 20th century the groundbreaking work\ud
of Ramon y Cajal firmly established the neuron doctrine, according to which neurons are the basic structural and functional units of the nervous system. Von Weldeyer coined the term “neuron” in 1891, but the huge leap forward in\ud
neuroscience was due to Cajal’s meticulous microscopic observations of brain sections stained with an improved version of Golgi’s la reazione nera (black reaction). The latter improvement of Golgi’s technique made it possible to visualize the arborizations of single neurons that were “colored brownish black even to their finest branchlets, standing out with unsurpassable clarity upon a transparent yellow background. All was sharp as a sketch with Chinese ink”. The high quality of both the visualization of individual nerve cells and the work performed on studying the anatomy of the central nervous system lead Ramon y Cajal to the conclusion that axons output the nervous impulses to the dendrites or the soma of other target neurons
Organ Transplants: Ethical, Social, and Religious Issues in a Multicultural Society
No full textRecent advances in the fields of organ donation and organ transplant have introduced new hope for the treatment of serious diseases. However, this promise has been accompanied by several issues. The most common issue raised is ethical implications, but in a multicultural society like Malaysia, additional concerns arise pertaining to social and religious issues. These concerns needs to be addressed as attitudes toward and acceptability of organ donation varies according to social, culture, and religion. The diverse cultural, religious, and traditional concepts pertaining to organ donation may hamper its acceptability and cause a lack of willingness to donate organs. The purpose of this article is to briefly explore the ethical issues involved in organ transplant and the various religious opinions on organ donation. It is hoped that this knowledge and understanding may benefit both health care providers and patients in a multicultural society like Malaysia
Illicit ketamine induced frequency of micturition in a young Malay woman
No full textIssues. The growing use of illicit ketamine among young adults poses a public health concern in Malaysia. In contrast to medical use of ketamine, illicit use has been reported to produce adverse effects on the urinary tract and, in particular the bladder. Approach and Key Findings. This case report describes a young Malay woman who developed severe bladder symptoms (urinary frequency) after consuming illicit ketamine. A history of illicit ketamine use was initially missed, and she was consequently diagnosed and treated for a urinary tract infection. Her symptoms persisted despite several courses of antibiotics. The patient was subsequently referred to an urologist where cystoscopic examination and biopsy of the bladder found changes consistent with interstitial cystitis. This was despite the absence of haematuria. Renal function was normal. Implication. The patient's ketamine use was the most likely cause for the urinary symptoms and bladder changes. Conclusion. Illicit ketamine use may lead to severe urinary tract problems that can be irreversible even after ketamine has ceased. Early diagnosis is critical although difficult when ketamine use is not divulged during the consultation with the physician. Physician consideration of this new clinical entity is important, particularly in cases where the symptoms do not resolve with usual treatment
A Validation Study of the Persian Version of Mckenzie's (1999) Multiple Intelligences Inventory to Measure MI Profiles of Pre-University Students
No full textTraditionally, intelligence was viewed as a single static entity. Revolutionizing the once-dominated “single-static entity” conceptualization, Gardner initially (1983) proposed his theory of Multiple intelligences (MI) that encompasses seven different areas of intelligence (verbal-linguistic, logical-mathematical, musical-rhythmic, visual-spatial, bodily-kinesthetic, interpersonal, and intrapersonal), and later on added the eighth and ninth areas (naturalist and existential) in 1999. Based on the theory of Multiple Intelligences (MI), a person may be viewed as intelligent in any of these areas, and the identification of the dominant intelligence type has proven to have pedagogic implications. McKenzie’s MI questionnaire (1999) is one of the established tools to identify the typology of intelligence. The present study aims to validate the Persian version of the MI Inventory (questionnaire) proposed by McKenzie (1999). This instrument provides an objective measure of MI. This paper describes the validation exercise of the abovementioned questionnaire that involved 173 pre-university students of both genders in Tehran. In addition, the variables gender and discipline were also considered in this study. The findings of the study indicate that overall, the Persian version of the questionnaire has a high reliability. In addition, the results show a moderate to high relationship between gender and MI profiles of the students