PROFILE OF STUDENTS' SPATIAL ABILITY IN SOLVING GEOMETRY PROBLEMS IN TERMS OF DAVID KEIRSEY'S PERSONALITY TYPES

This study aims to describe the ability of spatial geometry of class XI MIPA 1 SMA Negeri 2 Jember in terms of David Keirsey's personality type. Spatial ability in this study is the ability to understand the world of space based on elements of spatial abilities which include: spatial perception, mental rotation, and spatial visualization. This type of research is a descriptive study with a qualitative approach. The data collection method in this research is questionnaire, spatial test, and interview. Then, based on the results of the test and interview analysis, it was found that the Guardian students could fulfill all spatial indicators. Artisan students in imagining and rotating spaces can think quickly and answer questions correctly, compared to guardian and idealistic students. Idealistic students in the ability to see the surface of the unit cubic structure more than the point of view (from the front, right side, and top) cannot describe it precisely. Meanwhile, rational students on the mental rotation element for the first indicator are still unable to rotate a spatial shape and can imagine the rotation or rotation of a spatial shape accurately.

Optimizing dosage-specific treatments in a multi-scale model of a tumor growth

The emergence of cell resistance in cancer treatment is a complex phenomenon that emerges from the interplay of processes that occur at different scales. For instance, molecular mechanisms and population-level dynamics such as competition and cell-cell variability have been described as playing a key role in the emergence and evolution of cell resistances. Multi-scale models are a useful tool to study biology at a very different time and spatial scales, as they can integrate different processes that take place at the molecular, cellular and intercellular levels. In the present work, we use an extended hybrid multi-scale model of 3T3 fibroblast spheroid to perform a deep exploration of the parameter space of effective treatment strategies based on TNF pulses. To explore the parameter space of effective treatments in different scenarios and conditions, we have developed an HPC-optimized model exploration workflow based on EMEWS. We first studied the effect of the cells spatial distribution in the values of the treatment parameters by optimizing the supply strategies in 2D monolayers and 3D spheroids of different sizes. We later study the robustness of the effective treatments when heterogeneous populations of cells are considered. We found that our model exploration workflow can find effective treatments in all the studied conditions. Our results show that cells' spatial geometry, as well as, population variability should be considered when optimizing treatment strategies in order to find robust parameter sets.

Intact finger representation within primary sensorimotor cortex of Musicians Dystonia

Musicians dystonia presents with a persistent deterioration of motor control during musical performance. A predominant hypothesis has been that this is underpinned by maladaptive neural changes to the somatotopic organisation of finger representations within primary somatosensory cortex. Here, we tested this hypothesis by investigating the finger-specific activity patterns in the primary somatosensory and motor cortex using functional magnetic resonance (fMRI) in nine musicians with dystonia and nine healthy musicians. A purpose-built keyboard device allowed fMRI characterisation of activity patterns elicited during passive extension and active finger presses of individual fingers. We analysed the data using both traditional spatial analysis and state-of-the art multivariate analyses. Our analysis reveals that digit representations in musicians were poorly captured by spatial measures. An optimised spatial metric found clear somatotopy but no difference in the spatial geometry between fingers. Representational similarity analysis was confirmed as a highly reliable technique and more consistent than all spatial metrics evaluated. Significantly, the dissimilarity architecture was equivalent for musicians with and without dystonia and no expansion or spatial shift of digit representation maps were found in the symptomatic group. Our results therefore suggest that the neural representation of generic finger maps in primary sensorimotor cortex is intact in Musicians dystonia. These results are against the idea that task-specific dystonia is associated with a distorted hand somatotopy and suggests that task-specific dystonia is due to a higher order disruption of skill encoding. Such a formulation can better explain the task-specific deficit and offers mechanistic insight for therapeutic interventions.

On the Parallel Kinematics of the FET Stretching Press in the Stretch Forming Operations in the Manufacture of Parts with Complex Spatial Geometry

The kinematics of a stretching press mechanism of a parallel structure are investigated. The kinematic dependences aimed at setting the spatial position of the working elements of a cross-stretching press of FET type, which allow positioning its jaws at any time during the technological operations, are obtained. The forward and inverse control kinematics problems of the jaw mechanism stretching press are solved

P-BN48 Utilising spatial geometry to obtain the ideal needle mount for laparoscopic intracorporeal suturing

Background Intracorporeal suturing is an essential component of any advanced laparoscopic procedure like fundoplication, bypass surgery or common bile duct exploration. Obtaining the appropriate needle mount during suturing can be challenging. Spatial geometry defines points in three-dimensional space. Ergonomics in laparoscopic surgery identifies a manipulation angle of 60o to target as being optimal. This knowledge, in combination with the principles of light reflection can be used to understand needle orientation in laparoscopic suturing. Methods An experiment was designed on a laparoscopic trainer with three participants. Using the principles of spatial geometry and light reflection, four different points were identified on an angle chart and labelled for a right-hand dominant participant as; centre, right off-centre (5.5cm), right lateral (10 cm) and left off-centre (5.5cm). Each participant was instructed to mount the needle at the defined points using light reflection on the needle shaft as a reference guide. Three readings were taken for each position. Mounted angle was defined as the angle between the shaft of needle holder and long axis of the needle. This was measured using a special application and an average value determined for each position. Results The average values for the mounted angle measurements for each spatial position were: Centre(112o), Right off centre(101o), Right lateral (88.8o) and Left off centre (124.6o). Conclusions This study describes a novel and reproducible technique to obtain an ideal needle mount. For a needle mount greater than 100o either the centre position or the left off-centre position should be considered.

Tecnologias Educacionais: Software Geogebra Auxiliando na Geometria Espacial do Ensino Médio / Educational Technologies: Geogebra Software Helping High School Spatial Geometry

Resumo: A globalização trouxe uma grande abertura para os mercados internacionais, por ter descaracterizado as fronteiras físicas entre os países que trocam informações em alta velocidade e possibilitam ao comércio internacionalizar-se definitivamente. Por outro lado, disseminou a utilização das novas Tecnologias da Informação e da Comunicação indiscriminadamente, inclusive as instituições de ensino a buscarem estratégias para manterem seus alunos motivados para o aprendizado. Nesse contexto, as escolas têm que apoiar-se em recursos altamente tecnológicos para atender sua clientela ávida por tecnologias, mas que não têm background para utilizá-las de modo conveniente para buscar o conhecimento. São professores que devem esmerar-se no sentido de propiciar meios cada vez mais sofisticados para manterem alunos envolvidos. Esse trabalho tem por objetivo mostrar as vantagens da utilização das ferramentas tecnológicas no ensino da Geometria Espacial. A metodologia adotada para desenvolvimento dessa pesquisa é a pesquisa bibliográfica, mas especificamente, a pesquisa explioratória que tem por disciplina a coleta e seleção dos dados, a escolha das fontes bibliográficas compostas por livros e artigos referentes ao tema.Palavras-Chave: Geometria, espacial, ensino, TICs., Geogebra. Abstract: Globalization has brought a great opening to international markets, as it has de-characterized the physical borders between countries that exchange information at high speed and enable commerce to definitively internationalize. On the other hand, it disseminated the use of new Information and Communication Technologies indiscriminately, including educational institutions to seek strategies to keep their students motivated for learning. In this context, schools have to relyon highly technological resources to serve their clientele who are eager for technologies, but who do not have the background to use them in a convenient way to seek knowledge. They are teachers who must strive to provide increasingly sophisticated means to keep students involved. This work aims to show the advantages of using technological tools in teaching Spatial Geometry. The methodology adopted for the development of this research is the bibliographic research, but specifically, the exploratory research whose discipline is the collection and selection of data, the choice of bibliographic sources composed of books and articles referring to the theme.Keywords: Geometry, spatial, teaching, ICTs., Geogebra.

Collection of Laser Ablation Products by Means of an Electrostatic Field

The work is devoted to the problem of controlled laser micromachining of materials surface layers. The problem of ablation products reverse deposition near the laser processing region is considered. Laser ablation products, in addition to direct interaction with laser radiation, significantly increase lifetime and temperature of laser-induced plasma torch, which leads to decrease in energy entering processing area, as a result of which not removal, but heating of coating material occurs. Ablated particles can be deposited on the processed samples surface, which causes distortions in recorded structure spatial geometry. The possibility of using an electrostatic filtration system is considered as a method for protecting treated surface.