2,224,252 research outputs found

    Conceptual Model for Communication

    Get PDF
    A variety of idealized models of communication systems exist, and all may have something in common. Starting with Shannons communication model and ending with the OSI model, this paper presents progressively more advanced forms of modeling of communication systems by tying communication models together based on the notion of flow. The basic communication process is divided into different spheres (sources, channels, and destinations), each with its own five interior stages, receiving, processing, creating, releasing, and transferring of information. The flow of information is ontologically distinguished from the flow of physical signals, accordingly, Shannons model, network based OSI models, and TCP IP are redesigned.Comment: 13 pages IEEE format, International Journal of Computer Science and Information Security, IJCSIS November 2009, ISSN 1947 5500, http://sites.google.com/site/ijcsis

    Penerapan Model Conceptual Understanding Procedures untuk Meningkatkan Hasil Belajar Kognitif Siswa dalam Pembelajaran IPA Fisika di Kelas VII SMPN 4 Pekanbaru

    Full text link
    This research aims to determine the increase cognitif result in physics learning of the first grade students through conceptual understanding procedures (CUPs) learning model. This research was conducted from November to December 2015 in SMPN 4 Pekanbaru with research subject is class VII10 consist of 36 students as a control group with conventional learning and class VII8 consist of 34 students as a experimental group with conceptual understanding procedures (CUPs) learning model. This research is pre-experimental with Intact Group Comparison Design. Instrument of collecting data in this research is a cognitive achievement test consisting of 15 multiple choice items. The data that collected was analyzed through descriptive and inferensial analyze. The result of descriptive analysis obtained that average absorption and effectiveness of learning in the experimental class is 84% and 73% of control class with high category and effective. The results of inferential analysis through the sign test obtained a value sig.2 tailed < 0,05 (0,00<0,05) which means Ha is accept. It show there is a significant difference between CUPs learning with conventional learning of cognitif result students of the subject matter expansion. Based on data analysis,it can be concluded that implementation of conceptual understanding procedures was able to improve the cognitive result in physics learning of the first grade students of SMPN 4 pekanbaru

    Penerapan Model Conceptual Understanding Procedures untuk Meningkatkan Sikap Keingintahuan(curiosity) Siswa dalam Pembelajaran IPA Fisika di Kelas VII SMPN 4 Pekanbaru

    Full text link
    This research is to determine the gain of students' curiousity to learning physics at SMPN 4 in Pekanbaru by applying the model of Conceptual Understanding Procedures (CUPs). Survey and Observation are applied to respondents consisting of 7th grade students at SMPN 4 in Pekanbaru. Data analysis is conducted by using Gain curiosity students of developed questionnaire responses that distributed to 36 students for experiment class and 34 students for control class. Observation is made by observing 2 groups of students from experiment class consisting 12 students each group. The results of this research indicate that the results of questionnaires and observations can be concluded that the implementation of models of Conceptual Understanding Procedures (CUPs) that have been applied to the class VII SMPN 4 in Pekanbaru can improve the curiosity of the students in the learning process

    Developing a conceptual model for exploring emergence

    Get PDF
    Emergence is a fundamental property of complex systems and can be thought of as a new property or behaviour which appears due to non-linear interactions within the system; emergence may be considered to be the 'product' or by-product of the system. For example, within social systems, social capital, the World Wide Web, law and indeed civilization in general may be considered emergent, although all within different time scales. As our world becomes increasingly more interconnected, understanding how emergence arises and how to design for and manage specific types of emergence is ever more important. To date, the concept of emergence has been mainly used as an explanatory framework (as used by Johnson 2001), to inform the logic of action research (Mitleton-Kelly 2004) or as a means of exploring the range of emergent potential of simulation of real complex systems (Axelrod 2003). If we are to improve our ability to manage and control emergence, we need first to directly study the phenomenon of emergence, its causes and consequences across real complex systems

    Conceptual Problems of the Standard Cosmological Model

    Full text link
    The physics of the expansion of the universe is still a poorly studied subject of the standard cosmological model. This because the concept of expanding space can not be tested in the laboratory and because ``expansion'' means continuous creation of space, something that leads to several paradoxes. We re-consider and expand here the discussion of conceptual problems, already noted in the literature, linked to the expansion of space. In particular we discuss the problem of the violation of energy conservation for local comoving volumes, the exact Newtonian form of the Friedmann equations, the receding velocity of galaxies being greater than the speed of light, and the Hubble law inside inhomogeneous galaxy distribution. Recent discussion by Kiang, Davis \& Lineweaver, and Whiting of the non-Doppler nature of the Lemaitre cosmological redshift in the standard model is just a particular consequence of the paradoxes mentioned above. The common cause of these paradoxes is the geometrical description of gravity (general relativity), where there is not a well defined concept of the energy-momentum tensor for the gravitational field and hence no energy-momentum conservation for matter plus gravity.Comment: 13 pages, to be published in the Proceedings of the 1st Crisis in Cosmology Conference, AIP proc. serie

    A conceptual disease model for adult Pompe disease

    Get PDF
    __Background:__ Studies in orphan diseases are, by nature, confronted with small patient populations, meaning that randomized controlled trials will have limited statistical power. In order to estimate the effectiveness of treatments in orphan diseases and extrapolate effects into the future, alternative models might be needed. The purpose of this study is to develop a conceptual disease model for Pompe disease in adults (an orphan disease). This conceptual model describes the associations between the most important levels of health concepts for Pompe disease in adults, from biological parameters via physiological parameters, symptoms and functional indicators to health perceptions and final health outcomes as measured in terms of health-related quality of life. __Methods:__ The structure of the Wilson-Cleary health outcomes model was used as a blueprint, and filled with clinically relevant aspects for Pompe disease based on literature and expert opinion. Multiple observations per patient from a Dutch cohort study in untreated patients were used to quantify the relationships between the different levels of health concepts in the model by means of regression analyses. __Results:__ Enzyme activity, muscle strength, respiratory function, fatigue, level of handicap, general health perceptions, mental and physical component scales and utility described the different levels of health concepts in the

    A Conceptual UX-aware Model of Requirements

    Full text link
    User eXperience (UX) is becoming increasingly important for success of software products. Yet, many companies still face various challenges in their work with UX. Part of these challenges relate to inadequate knowledge and awareness of UX and that current UX models are commonly not practical nor well integrated into existing Software Engineering (SE) models and concepts. Therefore, we present a conceptual UX-aware model of requirements for software development practitioners. This layered model shows the interrelation between UX and functional and quality requirements. The model is developed based on current models of UX and software quality characteristics. Through the model we highlight the main differences between various requirement types in particular essentially subjective and accidentally subjective quality requirements. We also present the result of an initial validation of the model through interviews with 12 practitioners and researchers. Our results show that the model can raise practitioners' knowledge and awareness of UX in particular in relation to requirement and testing activities. It can also facilitate UX-related communication among stakeholders with different backgrounds.Comment: 6th International Working Conference on Human-Centred Software Engineerin

    Conceptual model of E. coli transcriptional machinery

    Get PDF
    At the moment one type of analysis of transcription regulatory networks (TRNs) in prokaryotes is topological analysis of graph structure of possible regulatory interaction links (see for example [1]). That type of analysis takes into account possibility links that designate the fact that one gene product in some conditions can modulate transcription of the other. The benefit of such approach is that it is allow analyzing TRN at the whole cell level. At the same type it is known that at least some responses are regulated by abundance of elements of transcription machinery [2-3]. We have developed conceptual model of whole cell E. coli TRN with SBGN ER, SBGN PD and SBGN AF languages [4]. That model is the first step towards incorporation of some quantitative information into whole cell TRN modeling.&#xd;&#xa;&#xd;&#xa;1.&#x9;Freyre-Gonz&#xe1;lez et al. Functional architecture of Escherichia coli: new insights provided by a natural decomposition approach. Genome Biol (2008) vol. 9 (10) pp. R154&#xd;&#xa;2.&#x9;Klumpp and Hwa. Growth-rate-dependent partitioning of RNA polymerases in bacteria. Proc Natl Acad Sci USA (2008) vol. 105 (51) pp. 20245-50&#xd;&#xa;3.&#x9;Barker et al. Mechanism of regulation of transcription initiation by ppGpp. II. Models for positive control based on properties of RNAP mutants and competition for RNAP. J Mol Biol (2001) vol. 305 (4) pp. 689-702&#xd;&#xa;4.&#x9;Le Nov&#xe8;re et al. The systems biology graphical notation. Nature biotechnology (2009) vol. 27 (8) pp. 735-41&#xd;&#xa
    corecore