Analysis of Heart-Sound Characteristics during Motion Based on a Graphic Representation

In this paper, the graphic representation method is used to study the multiple characteristics of heart sounds from a resting state to a state of motion based on single- and four-channel heart-sound signals. Based on the concept of integration, we explore the representation method of heart sound and blood pressure during motion. To develop a single- and four-channel heart-sound collector, we propose new concepts such as a sound-direction vector of heart sound, a motion–response curve of heart sound, the difference value, and a state-change-trend diagram. Based on the acoustic principle, the reasons for the differences between multiple-channel heart-sound signals are analyzed. Through a comparative analysis of four-channel motion and resting-heart sounds, from a resting state to a state of motion, the maximum and minimum similarity distances in the corresponding state-change-trend graphs were found to be 0.0038 and 0.0006, respectively. In addition, we provide several characteristic parameters that are both sensitive (such as heart sound amplitude, blood pressure, systolic duration, and diastolic duration) and insensitive (such as sound-direction vector, state-change-trend diagram, and difference value) to motion, thus providing a new technique for the diverse analysis of heart sounds in motion.

PENGARUH MODEL PEMBELAJARAN INKUIRI TERBIMBING BERBANTUAN LABORATORIUM VIRTUAL TERHADAP KEMAMPUAN REPRESENTASI GRAFIK SISWA SMA DI SEKOLAH

This study aims to determine the effect of the guided inquiry learning model assisted by a virtual laboratory on the graphic representation ability of high school students in schools. The multi-representation used in this study is a graphical representation. This study uses a quasi-experimental method with a post test only design. The sample used in this study was taken by purposive sampling technique. This research was conducted at SMAN Pakusari with the research subjects of class X MIA 4 as the experimental class and class X MIA 1 as the control class. Data collection techniques using tests, tests in this study as data collection containing questions / exercises that are used to measure the ability of graphic representation owned by each individual. Based on the results of the t-test, with the 2 independent sample t-test or Mann-Whitney U test, it can be seen that the output of the Statistic Test for the asymp value. Sig. (2-tailed) that is 0.002 < 0.05 so that there is a significant effect between the ability of graphic representation in the experimental class and the control class. Keywords: Guided Inquiry, Virtual Laboratory, Graphic Representation Ability

Children’s graphic representation as a language and its role in preschool education under a whole-child approach

The objective of the present study is to analyze the drawings of the space by children as a representation system involving spatial thinking and higher mental functions such as memory and imagination. Our analysis is based on the historical-cultural theory on human development and on studies about the relation between spatial thinking and the graphic representation of space. Drawing is a language, the first written production by children and is characterized by elements associated with the cognition, culture, motor development and affectivity. Three elements were considered in our analysis: a) the creation of graphic equivalents; b) volume translation; c) perspective. We understand that the topological and projective notions must be based on the development of higher mental functions that mobilize the creation activity, such as memory and imagination, since such these functions constitute instruments to access systematized knowledge.

Graphic Representation of The Degree of Historical-Archaeological Evidence: The 3D Reconstruction of The “Baker’s House”

Over the years, the methodologies used for graphic representation in archaeology have evolved. The substantial change in representation was achieved with the use of computer software. Currently, sketch scanning and photogrammetry are predominating tools used in this field. A new methodology, i.e., the use of the historical-archaeological evidence level scale, has entered this discipline to show the veracity of archaeological studies, as well as that of the vestiges found. The present study is focused on the virtual reconstruction of the ‘Baker’s House’ in the archaeological site of Torreparedones (Córdoba, Spain). The main aim of this study was to show and identify the veracity of the obtained reconstruction, through the use of the historical-archaeological evidence scale. The methodology used shows the evidence level employed by experts in the creation of virtual representations. The dissemination of the proposed historical-archaeological evidence scale entails the graphical identification of the veracity of reconstructions in this type of representations, always complying with the scientific quality criteria established by the Seville Letter.

Drawing and architectural analysis of San Ildefonso’s Baths in Seville (1542)

This paper deals with the first hypotheses of elevations and of the architectural analysis of San Ildefonso’s Baths on the basis of unpublished data offered by the Book of written descriptive records (apeos) of 1542 in the Chapter on Seville Cathedral. Our own transformation methodology has been applied to this hitherto largely unknown book in order to attain and encompass graphic representation from the literary description. After giving a brief history of the Baths, the objective is to ascertain its location, by drawing hypothetical floor plans and elevations and analysing its typology, dimensions, spaces, and building elements. This research has shown that it was one of the most important bathing complexes in the historical centre of Seville, at least in the 13th Century, although it later became obsolete and was demolished in the 18th Century.

A comparison between analogic and digital media in Engineering teaching

Form representation is essential for any area that involves the creation of artefacts, since without it the project is just an idea in the mental field. In general terms, it is the ability to perceive and understand shapes and represent them through perspectives and orthographic views, as well as through models and geometric models. Given the issues raised, it is possible to understand the importance of knowledge related to the graphic representation of architecture for professionals involved with the Aeco Industry (Architecture, Engineering, Construction and Operation) and, also the relevance of graphic geometry disciplines on the development of Visiographic Three-dimensional Capacity. So, this paper aims to investigate the impact caused by the use of traditional and digital media in the teaching of graphic representation. To this end, two groups of students were compared, one exposed to the use of both media - analogic and digital - and another that used just digital media. From the application of questionnaires, it was possible to identify the student’s profile, their preferences of media and difficulties encountered. The work presumes that students exposed to more disciplines of graphic geometry will have less difficulties compared to those who had less contact. The main results indicated that: there is a preference, in both groups, for digital media to perform practical activities; the need to adapt the content to each specific engineering and that the most significant difficulties were related to work management, regardless of the media used.

Reconstrucción protorromance desde la fonética: problemas metodológicos y propuestas cronológicas

The main goal of this paper is to establish an ordered timeline of the phonetic shifts that oral Latin experienced since the split of Sardinian up to the disintegration of the western family; at the same time, some methodological problems about the graphic representation of the relations among languages are discussed. Consequently, we propose a division of the branches of the Romance family and outline the phonological systems that characterized each group.

Pure cross-anisotropy for geotechnical elastic potentials

The pure cross-anisotropy is understood as a special scaling of strain (or stress). The scaled tensor is used as an argument in the elastic stiffness (or compliance). Such anisotropy can be overlaid on the top of any elastic stiffness, in particular on one obtained from an elastic potential with its own stress-induced anisotropy. This superposition does not violate the Second Law. The method can be also applied to other functions like plastic potentials or yield surfaces, wherever some cross-anisotropy is desired. The pure cross-anisotropy is described by the sedimentation vector and at most two constants. Scaling with more than two purely anisotropic constants is shown impossible. The formulation was compared with experiments and alternative approaches. Static and dynamic calibration of the pure anisotropy is also discussed. Graphic representation of stiffness with the popular response envelopes requires some enhancement for anisotropy. Several examples are presented. All derivations and examples were accomplished using the algebra program Mathematica.